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Length: 183625 (0x2cd49)
Types: TextFile
Notes: Uncompressed file
└─⟦52210d11f⟧ Bits:30007239 EUUGD2: TeX 3 1992-12
└─⟦beba6c409⟧ »unix3.0/Unsupported.tar.Z«
└─⟦25c524ae4⟧
└─⟦d7caca8c6⟧ »Unsupported/tex82.sh.Z«
└─⟦this⟧
# This is a shell archive.
# Remove everything above and including the cut line.
# Then run the rest of the file through sh.
#-----cut here-----cut here-----cut here-----cut here-----
#!/bin/sh
# shar: Shell Archiver
# Run the following text with /bin/sh to create:
# Makefile.PYR
# Makefile.SUN_V2
# Makefile.SUN_V3
# Makefile.SYS_V
# Makefile.VAX4_2
# Makefile.VAX4_3
# dist_initex.BSD4_n.ch
# dist_initex.PYR.ch
# dist_initex.SYS_V.ch
# ini_to_trip.BSD4_n
# ini_to_trip.PYR
# ini_to_trip.SYS_V
# ini_to_vir.BSD4_n
# ini_to_vir.PYR
# ini_to_vir.SYS_V
# maketex.SYS_V
# texsep.SYS_V.sed
# This archive created: Sat Jul 2 22:26:36 1988
cat << \SHAR_EOF > Makefile.PYR
#
# Makefile for Pyramid OSX version of TeX, 4.2 bsd Release 4.5
#
#
# Note: The variable MAKELOCALCOPY below should be set to the name of a
# shell script if you need to change the Unix TeX change files from
# that distributed. Typically, that change file would use 'sed' to
# effect the change. If you are going with the status quo, you should
# set MAKELOCALCOPY to the system command ``/bin/cp''. Note that if
# you need to change the locations of fonts and TeX libraries, the
# proper file to adjust is named 'texpaths.h'
#
# At present, the Pascal compiler needs to use a non-standard assembler
# supplied by Pyramid in /bin/nas. Unlike the UCB compiler, nothing
# special is required to handle "other" CASE clauses (but the change
# file has to tell TANGLE that they're pronounced "otherwise:")
PFLAGS= -T4/bin/nas
PC= pascal
PCLIB=
TANGLE= ./TeXware/tangle
MAKELOCALCOPY= /bin/cp
BINDIR=/usr/local
LIBDIR=/usr/lib/tex
default: tangle initex virtex undump
all: tangle initex virtex triptex undump
install: all
mv initex virtex $(BINDIR)
mv initex.pool $(LIBDIR)/tex.pool
-mv triptex.pool $(LIBDIR)/triptex.pool
#
# Tangle---must make sure this is present first
#
tangle:
cd ./TeXware; make tangle
#
# undump
#
undump:
cd ../undump; make undump
#
# INITEX: The slow version of TeX which is able to make .fmt files,
# read hyphenation patterns, etc.
#
initex: initex.o ext.o
$(PC) $(PFLAGS) -g -w -o initex initex.o ext.o $(PCLIB)
initex.s: initex.p
$(PC) -S $(PFLAGS) -w initex.p
initex.o: initex.s
$(PC) -c $(PFLAGS) -w initex.s
initex.p: tex.web initex.ch
$(TANGLE) tex.web initex.ch
mv tex.p initex.p
mv tex.pool initex.pool
initex.ch: dist_initex.pyramid-ch
$(MAKELOCALCOPY) dist_initex.pyramid-ch initex.ch
#
# VIRTEX: The fast version of TeX which relies on .fmt files to perform
# the necessary initiations.
#
virtex: virtex.o ext.o
$(PC) $(PFLAGS) -w -o virtex virtex.o ext.o $(PCLIB)
# we would love to use the -O flag here but it seems to cause buggy
# results
virtex.s: virtex.p
$(PC) $(PFLAGS) -S -w virtex.p
# we would love to use the -O flag here but it seems to cause buggy
# results
virtex.o: virtex.s
$(PC) $(PFLAGS) -w -c virtex.s
virtex.p: tex.web virtex.ch
$(TANGLE) tex.web virtex.ch
mv tex.p virtex.p
virtex.ch: initex.ch
ini_to_vir initex.ch virtex.ch
#
# TRIPTEX: The version of TeX with the constants set to the special values
# needed when running the infamous and nefarious ``trip'' test.
#
triptex: triptex.o ext.o
$(PC) $(PFLAGS) -w -o triptex triptex.o ext.o $(PCLIB)
triptex.o: triptex.p
$(PC) $(PFLAGS) -S -w triptex.p
$(PC) $(PFLAGS) -w -c triptex.s
triptex.p: tex.web triptex.ch
$(TANGLE) tex.web triptex.ch
mv tex.pool triptex.pool
mv tex.p triptex.p
triptex.ch: initex.ch
ini_to_trip initex.ch triptex.ch
#
# Miscelaneous stuff.
#
# we would love to use the -O flag here but it seems to cause buggy
# results
ext.o: ext.c ext.h h00vars.h texpaths.h
cc -c -I/usr/include/sys ext.c
clean:
rm -f core
rm -f initex.o virtex.o triptex.o
rm -f initex.p virtex.p triptex.p tex.p
rm -f initex.ch virtex.ch triptex.ch
rm -f initex.s virtex.s triptex.s
rm -f ext.o
SHAR_EOF
cat << \SHAR_EOF > Makefile.SUN_V2
# NOTE !!!!!!!!This is the old makefile for early versions of the
# Sun Operating system which took weeks to compile a complete
# source file for TeX. Use the new Makefile if you can.
#
# Makefile for Berkeley UNIX version of TeX, 4.2 bsd for the Sun
#
#
# Note: The variable MAKELOCALCOPY below should be set to the name of a
# shell script if you need to change the Unix TeX change files from
# that distributed. Typically, that change file would use 'sed' to
# effect the change. If you are going with the status quo, you should
# set MAKELOCALCOPY to the system command ``/bin/cp''. Note that if
# you need to change the locations of fonts and TeX libraries, the
# proper file to adjust is named 'texpaths.h'
#
# Also, the local variable FIXOTHERS is set to ``pxp -O -f'' for 4.2
# since you are not going to use a hacked pc compiler that recognizes
# the ``others:'' clause. You will need the new Berkeley pxp program
# that has the -O option to transform case statements with such
# clauses into code that doesn't use ``others:''.
# We use ``pxp -O -f'' here instead of ``pxp -O'' because we
# want to have expressions fully parenthesized to avoid a pxp bug.
# If you are using a hacked pc compiler, then set FIXOTHERS
# to ``cat''.
PFLAGS= -O -w -t /usr/tmp
PC= pc
PCLIB=
TANGLE= ./TeXware/tangle
MAKELOCALCOPY= /bin/cp
FIXOTHERS= pxp -O -f
BINDIR=/usr/bin
LIBDIR=/usr/lib/tex
# We have to break the input file into a lot of little files. If we don't
# do this, it takes the assembler a *long* time to assemble the program.
#
# Pieces for initex
IPIECES=initex1.o initex2.o initex3.o initex4.o
# Pieces for virtex
VPIECES=virtex1.o virtex2.o virtex3.o virtex4.o
# Pieces for triptex
TPIECES=triptex1.o triptex2.o triptex3.o triptex4.o
default: tangle initex virtex undump
all: tangle initex virtex triptex undump
install: all
mv initex virtex $(BINDIR)
mv initex.pool $(LIBDIR)/tex.pool
-mv triptex.pool $(LIBDIR)/triptex.pool
#
# Tangle---must make sure this is present first
#
tangle:
cd ./TeXware; make tangle
#
# undump
#
undump:
cd ../undump; make undump
#
# INITEX: The slow version of TeX which is able to make .fmt files,
# read hyphenation patterns, etc.
#
initex: $(IPIECES) ext.o
$(PC) $(PFLAGS) -w -o initex $(IPIECES) ext.o $(PCLIB)
initex.p: tex.web initex.ch
$(TANGLE) tex.web initex.ch
$(FIXOTHERS) tex.p > initex.p
mv tex.pool initex.pool
initex.ch: dist_initex.ch
$(MAKELOCALCOPY) dist_initex.ch initex.ch
# The Sun assembler seems to go into an infinite loop on TeX, so we
# break it up into separate compilations to circumvent the problem
# Note that this is VERY sensitive to changes in the TeX source
# These sed scripts were provided by Steve Correll of Lawrence
# Livermore Labs.
initex1.p: initex.p
sed < initex.p > initex.h \
-e '/function/s/[:(].*/(*&*);/' \
-e '/procedure/s/[(].*/(*&*);/' \
-e '/program TEX/w initex4.p' \
-e '/program TEX/s/.*/#include "initex.h"/' \
-e '/#include "initex.h"/w initex1.p' \
-e '/#include "initex.h"/w initex2.p' \
-e '/#include "initex.h"/w initex3.p' \
-e '/#include "initex.h"/w initex4.p' \
-e '/#include "initex.h"/d' \
-e '/procedure initialize/,/end; { getnext }/w initex1.p' \
-e '/procedure initialize/,/end; { getnext }/d' \
-e '/procedure firmuptheline/,/end; { fractionrul/w initex2.p' \
-e '/procedure firmuptheline/,/end; { fractionrul/d' \
-e '/function overbar/,/end; { alignerror }/w initex3.p' \
-e '/function overbar/,/end; { alignerror }/d' \
-e '/procedure noalignerror/,$$w initex4.p' \
-e '/procedure noalignerror/,$$d'
sed < initex.p -n >> initex.h \
-e '/function/s/$$/ external;/p' \
-e '/procedure/s/$$/ external;/p'
#
# VIRTEX: The fast version of TeX which relies on .fmt files to perform
# the necessary initiations.
#
virtex: $(VPIECES) ext.o
$(PC) $(PFLAGS) -w -o virtex $(VPIECES) ext.o $(PCLIB)
virtex.p: tex.web virtex.ch
$(TANGLE) tex.web virtex.ch
$(FIXOTHERS) tex.p > virtex.p
virtex.ch: initex.ch
ini_to_vir initex.ch virtex.ch
# These sed scripts were provided by Steve Correll of Lawrence
# Livermore Labs.
virtex1.p: virtex.p
sed < virtex.p > virtex.h \
-e '/[^{\]]function/s/[:(].*/(*&*);/' \
-e '/[^{\]]procedure/s/[(].*/(*&*);/' \
-e '/program TEX/w virtex4.p' \
-e '/program TEX/s/.*/#include "virtex.h"/' \
-e '/#include "virtex.h"/w virtex1.p' \
-e '/#include "virtex.h"/w virtex2.p' \
-e '/#include "virtex.h"/w virtex3.p' \
-e '/#include "virtex.h"/w virtex4.p' \
-e '/#include "virtex.h"/d' \
-e '/procedure initialize/,/end; { getnext }/w virtex1.p' \
-e '/procedure initialize/,/end; { getnext }/d' \
-e '/procedure firmuptheline/,/end; { fractionrul/w virtex2.p' \
-e '/procedure firmuptheline/,/end; { fractionrul/d' \
-e '/function overbar/,/end; { alignerror }/w virtex3.p' \
-e '/function overbar/,/end; { alignerror }/d' \
-e '/procedure noalignerror/,$$w virtex4.p' \
-e '/procedure noalignerror/,$$d'
sed < virtex.p -n >> virtex.h \
-e '/[^{\]]function/s/$$/ external;/p' \
-e '/[^{\]]procedure/s/$$/ external;/p'
#
# TRIPTEX: The version of TeX with the constants set to the special values
# needed when running the infamous and nefarious ``trip'' test.
#
triptex: $(TPIECES) ext.o
$(PC) $(PFLAGS) -w -o triptex $(TPIECES) ext.o $(PCLIB)
triptex.p: tex.web triptex.ch
$(TANGLE) tex.web triptex.ch
mv tex.pool triptex.pool
$(FIXOTHERS) tex.p > triptex.p
triptex.ch: initex.ch
ini_to_trip initex.ch triptex.ch
# This script is a modification of the virtex1 script above
triptex1.p: triptex.p
sed < triptex.p > triptex.h \
-e '/[^{\]]function/s/[:(].*/(*&*);/' \
-e '/[^{\]]procedure/s/[(].*/(*&*);/' \
-e '/program TEX/w triptex4.p' \
-e '/program TEX/s/.*/#include "triptex.h"/' \
-e '/#include "triptex.h"/w triptex1.p' \
-e '/#include "triptex.h"/w triptex2.p' \
-e '/#include "triptex.h"/w triptex3.p' \
-e '/#include "triptex.h"/w triptex4.p' \
-e '/#include "triptex.h"/d' \
-e '/procedure initialize/,/end; { getnext }/w triptex1.p' \
-e '/procedure initialize/,/end; { getnext }/d' \
-e '/procedure firmuptheline/,/end; { fractionrul/w triptex2.p' \
-e '/procedure firmuptheline/,/end; { fractionrul/d' \
-e '/function overbar/,/end; { alignerror }/w triptex3.p' \
-e '/function overbar/,/end; { alignerror }/d' \
-e '/procedure noalignerror/,$$w triptex4.p' \
-e '/procedure noalignerror/,$$d'
sed < triptex.p -n >> triptex.h \
-e '/[^{\]]function/s/$$/ external;/p' \
-e '/[^{\]]procedure/s/$$/ external;/p'
#
# Miscelaneous stuff.
#
# we would love to use the -O flag here but it seems to cause buggy
# results
ext.o: ext.c ext.h h00vars.h texpaths.h
cc -c -O ext.c
clean:
rm -f core
rm -f initex.o virtex.o triptex.o
rm -f initex?.o virtex?.o triptex?.o
rm -f initex.p virtex.p triptex.p tex.p
rm -f initex?.p virtex?.p triptex?.p
rm -f initex.ch virtex.ch triptex.ch
rm -f initex.s virtex.s triptex.s
rm -f ext.o
rm -f initex.h virtex.h triptex.h
SHAR_EOF
cat << \SHAR_EOF > Makefile.SUN_V3
#
# Makefile for Berkeley UNIX version of TeX, 4.2 bsd for the Sun
# Sun3 OS 3.0 and above. Sun2 OS 3.2 and above
# (TeX cannot be compiled on a Sun2 running OS 3.0 or 3.1)
#
# Note: The variable MAKELOCALCOPY below should be set to the name of a
# shell script if you need to change the Unix TeX change files from
# that distributed. Typically, that change file would use 'sed' to
# effect the change. If you are going with the status quo, you should
# set MAKELOCALCOPY to the system command ``/bin/cp''. Note that if
# you need to change the locations of fonts and TeX libraries, the
# proper file to adjust is named 'texpaths.h'
#
# The SUN pc allows ``otherwise'' for the default case, and you get
# better code by using this and setting FIXOTHERS to ``cat''.
PFLAGS= -w -temp=/usr/tmp
PPFLAGS= -O
PC= pc
PCLIB=
TANGLE= ./TeXware/tangle
MAKELOCALCOPY= /bin/cp
FIXOTHERS= cat
#
# Try setting FIXOTHERS= pxp -O -f if this fails. You will also
# have to eliminate the sed scripts and change them to
# cp dist_initex.ch initex.ch
BINDIR=/usr/bin
LIBDIR=/usr/lib/tex
# Versions of the SUN pc after 3.0 (Sun3 only) and 3.2 (Sun2 and Sun3)
# seem to be able to compile TeX in one piece.
# If it takes the assembler a *long* time to assemble the program, you
# will have to go back and try Makefile.SUN_V2
#
default: tangle initex virtex undump
all: tangle initex virtex triptex undump
install: all
mv initex virtex $(BINDIR)
mv initex.pool $(LIBDIR)/tex.pool
-mv triptex.pool $(LIBDIR)/triptex.pool
#
# Tangle---must make sure this is present first
#
tangle:
cd ./TeXware; make tangle
#
# undump
#
undump:
cd ../undump; make undump
#
# INITEX: The slow version of TeX which is able to make .fmt files,
# read hyphenation patterns, etc.
#
initex: initex.o ext.o
$(PC) $(PFLAGS) -g -w -o initex initex.o ext.o $(PCLIB)
initex.p: tex.web initex.ch
$(TANGLE) tex.web initex.ch
$(FIXOTHERS) tex.p > initex.p
mv tex.pool initex.pool
initex.ch: dist_initex.ch
sed.Sun_changes
#
# VIRTEX: The fast version of TeX which relies on .fmt files to perform
# the necessary initiations.
#
virtex: virtex.o ext.o
$(PC) $(PPFLAGS) $(PFLAGS) -w -o virtex virtex.o ext.o $(PCLIB)
virtex.p: tex.web virtex.ch
$(TANGLE) tex.web virtex.ch
$(FIXOTHERS) tex.p > virtex.p
virtex.ch: initex.ch
ini_to_vir initex.ch virtex.ch
#
# TRIPTEX: The version of TeX with the constants set to the special values
# needed when running the infamous and nefarious ``trip'' test.
#
triptex: triptex.o ext.o
$(PC) $(PFLAGS) -w -o triptex triptex.o ext.o $(PCLIB)
triptex.p: tex.web triptex.ch
$(TANGLE) tex.web triptex.ch
mv tex.pool triptex.pool
$(FIXOTHERS) tex.p > triptex.p
triptex.ch: initex.ch
ini_to_trip initex.ch triptex.ch
#
# Miscellaneous stuff.
#
ext.o: ext.c ext.h h00vars.h texpaths.h
cc -c -O ext.c
clean:
rm -f core
rm -f initex.o virtex.o triptex.o
rm -f initex.p virtex.p triptex.p tex.p
rm -f initex.ch virtex.ch triptex.ch
rm -f initex.s virtex.s triptex.s
rm -f ext.o
rm -f initex.h virtex.h triptex.h
SHAR_EOF
cat << \SHAR_EOF > Makefile.SYS_V
#
# Makefile for System V UNIX version of TeX
#
# Note: The variable MAKELOCALCOPY below should be set to the name of a
# shell script if you need to change the Unix TeX change files from
# that distributed. Typically, that change file would use 'sed' to
# effect the change. If you are going with the status quo, you should
# set MAKELOCALCOPY to the system command ``/bin/cp''. Note that if
# you need to change the locations of fonts and TeX libraries, the
# proper file to adjust is named 'texpaths.h'
#
# The local variable FIXOTHERS is set to ``pxp -O -f -L100'' for System V
# since you are not going to use a hacked pc compiler that recognizes
# the ``others:'' clause. You will need a modified Berkeley pxp program
# that has the -O option to transform case statements with such
# clauses into code that doesn't use ``others:'' and the -L option
# to break up long lines.
#
# We use ``pxp -O -f -L100'' here instead of ``pxp -O -L100'' because we
# want to have expressions fully parenthesized to avoid a pxp bug.
# If you are using a hacked pc compiler, then set FIXOTHERS
# to ``cat''.
PFLAGS= -Tr
PC= pc
PCLIB=
TANGLE= tangle
MAKELOCALCOPY= /bin/cp
FIXOTHERS= pxp -O -f -L100
BINDIR=/usr/local
LIBDIR=/usr/local/lib/tex
default: tangle initex virtex undump
all: tangle initex virtex triptex undump
install: all
mv initex virtex $(BINDIR)
mv initex.pool $(LIBDIR)/tex.pool
-mv triptex.pool $(LIBDIR)/triptex.pool
#
# Tangle---must make sure this is present first
#
tangle:
cd ./TeXware; make tangle
#
# undump
#
undump:
cd ../undump; make undump
#
# INITEX: The slow version of TeX which is able to make .fmt files,
# read hyphenation patterns, etc.
#
initex: initex.p ext.o
maketex initex
initex.p: tex.web initex.ch
$(TANGLE) tex.web initex.ch
$(FIXOTHERS) tex.p > initex.p
mv tex.pool initex.pool
initex.ch: dist_initex.ch
$(MAKELOCALCOPY) dist_initex.ch initex.ch
#
# VIRTEX: The fast version of TeX which relies on .fmt files to perform
# the necessary initiations.
#
virtex: virtex.p ext.o
maketex virtex
virtex.p: tex.web virtex.ch
$(TANGLE) tex.web virtex.ch
$(FIXOTHERS) tex.p > virtex.p
virtex.ch: initex.ch
ini_to_vir initex.ch virtex.ch
#
# TRIPTEX: The version of TeX with the constants set to the special values
# needed when running the infamous and nefarious ``trip'' test.
#
triptex: triptex.p ext.o
maketex triptex
triptex.p: tex.web triptex.ch
$(TANGLE) tex.web triptex.ch
mv tex.pool triptex.pool
$(FIXOTHERS) tex.p > triptex.p
triptex.ch: initex.ch
ini_to_trip initex.ch triptex.ch
#
# Miscelaneous stuff.
#
# we would love to use the -O flag here but it seems to cause buggy
# results
ext.o: ext.c ext.h h00vars.h texpaths.h
cc -c -O ext.c
clean:
rm -f initex?.? virtex?.? triptex?.? initex.sed virtex.sed triptex.sed
rm -f initex.p virtex.p triptex.p tex.p initex.pool triptex.pool tex.pool
rm -f initex.ch virtex.ch triptex.ch
rm -f core ext.o initex virtex triptex
SHAR_EOF
cat << \SHAR_EOF > Makefile.VAX4_2
#
# Makefile for Berkeley UNIX version of TeX, 4.2 bsd
#
# Note: The -J option on the 'pc' commands below is the only way to
# 'pc' to use the -J option to the assembler (which makes it
# do the sensible thing with branches). This flag is not
# documented, which is correct, since 'pc' should really be
# using it all of the time... (Grrr..)
# The -S option is used because on some systems this is needed
# to keep from running out of tmp space.
#
# Note: The variable MAKELOCALCOPY below should be set to the name of a
# shell script if you need to change the Unix TeX change files from
# that distributed. Typically, that change file would use 'sed' to
# effect the change. If you are going with the status quo, you should
# set MAKELOCALCOPY to the system command ``/bin/cp''. Note that if
# you need to change the locations of fonts and TeX libraries, the
# proper file to adjust is named 'texpaths.h'
#
# Also, the local variable FIXOTHERS is set to ``pxp -O -f'' for 4.2
# since you are not going to use a hacked pc compiler that recognizes
# the ``others:'' clause. You will need the new Berkeley pxp program
# that has the -O option to transform case statements with such
# clauses into code that doesn't use ``others:''.
# We use ``pxp -O -f'' here instead of ``pxp -O'' because we
# want to have expressions fully parenthesized to avoid a pxp bug.
# If you are using a hacked pc compiler, then set FIXOTHERS
# to ``cat''.
PFLAGS= -J
PC= pc
PCLIB=
TANGLE= ./TeXware/tangle
MAKELOCALCOPY= /bin/cp
FIXOTHERS= pxp -O -f
BINDIR=/usr/local
LIBDIR=/usr/lib/tex
default: tangle initex virtex undump
all: tangle initex virtex triptex undump
install: all
mv initex virtex $(BINDIR)
mv initex.pool $(LIBDIR)/tex.pool
-mv triptex.pool $(LIBDIR)/triptex.pool
#
# Tangle---must make sure this is present first
#
tangle:
cd ./TeXware; make tangle
#
# undump
#
undump:
cd ../undump; make undump
#
# INITEX: The slow version of TeX which is able to make .fmt files,
# read hyphenation patterns, etc.
#
initex: initex.o ext.o
$(PC) $(PFLAGS) -g -w -o initex initex.o ext.o $(PCLIB)
initex.s: initex.p
$(PC) -S $(PFLAGS) -w initex.p
initex.o: initex.s
$(PC) -c $(PFLAGS) -w initex.s
initex.p: tex.web initex.ch
$(TANGLE) tex.web initex.ch
$(FIXOTHERS) tex.p > initex.p
mv tex.pool initex.pool
initex.ch: dist_initex.ch
$(MAKELOCALCOPY) dist_initex.ch initex.ch
#
# VIRTEX: The fast version of TeX which relies on .fmt files to perform
# the necessary initiations.
#
virtex: virtex.o ext.o
$(PC) $(PFLAGS) -w -o virtex virtex.o ext.o $(PCLIB)
# we would love to use the -O flag here but it seems to cause buggy
# results
virtex.s: virtex.p
$(PC) $(PFLAGS) -S -w virtex.p
# we would love to use the -O flag here but it seems to cause buggy
# results
virtex.o: virtex.s
$(PC) $(PFLAGS) -w -c virtex.s
virtex.p: tex.web virtex.ch
$(TANGLE) tex.web virtex.ch
$(FIXOTHERS) tex.p > virtex.p
virtex.ch: initex.ch
ini_to_vir initex.ch virtex.ch
#
# TRIPTEX: The version of TeX with the constants set to the special values
# needed when running the infamous and nefarious ``trip'' test.
#
triptex: triptex.o ext.o
$(PC) $(PFLAGS) -w -o triptex triptex.o ext.o $(PCLIB)
triptex.o: triptex.p
$(PC) $(PFLAGS) -S -w triptex.p
$(PC) $(PFLAGS) -w -c triptex.s
triptex.p: tex.web triptex.ch
$(TANGLE) tex.web triptex.ch
mv tex.pool triptex.pool
$(FIXOTHERS) tex.p > triptex.p
triptex.ch: initex.ch
ini_to_trip initex.ch triptex.ch
#
# Miscelaneous stuff.
#
# we would love to use the -O flag here but it seems to cause buggy
# results
ext.o: ext.c ext.h h00vars.h texpaths.h
cc -c ext.c
clean:
rm -f core
rm -f initex.o virtex.o triptex.o
rm -f initex.p virtex.p triptex.p tex.p
rm -f initex.ch virtex.ch triptex.ch
rm -f initex.s virtex.s triptex.s
rm -f ext.o
SHAR_EOF
cat << \SHAR_EOF > Makefile.VAX4_3
#
# Makefile for Berkeley UNIX version of TeX, 4.2 bsd
#
# Note: The -J option on the 'pc' commands below is the only way to
# 'pc' to use the -J option to the assembler (which makes it
# do the sensible thing with branches). This flag is not
# documented, which is correct, since 'pc' should really be
# using it all of the time... (Grrr..)
# The -S option is used because on some systems this is needed
# to keep from running out of tmp space.
#
# Note: The variable MAKELOCALCOPY below should be set to the name of a
# shell script if you need to change the Unix TeX change files from
# that distributed. Typically, that change file would use 'sed' to
# effect the change. If you are going with the status quo, you should
# set MAKELOCALCOPY to the system command ``/bin/cp''. Note that if
# you need to change the locations of fonts and TeX libraries, the
# proper file to adjust is named 'texpaths.h'
#
# Also, the local variable FIXOTHERS is set to ``pxp -O -f'' for 4.2
# since you are not going to use a hacked pc compiler that recognizes
# the ``others:'' clause. You will need the new Berkeley pxp program
# that has the -O option to transform case statements with such
# clauses into code that doesn't use ``others:''.
# We use ``pxp -O -f'' here instead of ``pxp -O'' because we
# want to have expressions fully parenthesized to avoid a pxp bug.
# If you are using a hacked pc compiler, then set FIXOTHERS
# to ``cat''.
PFLAGS= -J
PC= pc
PCLIB=
TANGLE= ./TeXware/tangle
MAKELOCALCOPY= /bin/cp
FIXOTHERS= pxp -O -f
BINDIR=/usr/local
LIBDIR=/usr/lib/tex
default: tangle initex virtex undump
all: tangle initex virtex triptex undump
install: all
mv initex virtex $(BINDIR)
mv initex.pool $(LIBDIR)/tex.pool
-mv triptex.pool $(LIBDIR)/triptex.pool
#
# Tangle---must make sure this is present first
#
tangle:
cd ./TeXware; make tangle
#
# undump
#
undump:
cd ../undump; make undump
#
# INITEX: The slow version of TeX which is able to make .fmt files,
# read hyphenation patterns, etc.
#
initex: initex.o ext.o
$(PC) $(PFLAGS) -g -w -o initex initex.o ext.o $(PCLIB)
initex.s: initex.p
$(PC) -S $(PFLAGS) -w initex.p
initex.o: initex.s
$(PC) -c $(PFLAGS) -w initex.s
initex.p: tex.web initex.ch
$(TANGLE) tex.web initex.ch
$(FIXOTHERS) tex.p > initex.p
mv tex.pool initex.pool
initex.ch: dist_initex.ch
$(MAKELOCALCOPY) dist_initex.ch initex.ch
#
# VIRTEX: The fast version of TeX which relies on .fmt files to perform
# the necessary initiations.
#
virtex: virtex.o ext.o
$(PC) $(PFLAGS) -w -o virtex virtex.o ext.o $(PCLIB)
# we would love to use the -O flag here but it seems to cause buggy
# results
virtex.s: virtex.p
$(PC) $(PFLAGS) -S -w virtex.p
# we would love to use the -O flag here but it seems to cause buggy
# results
virtex.o: virtex.s
$(PC) $(PFLAGS) -w -c virtex.s
virtex.p: tex.web virtex.ch
$(TANGLE) tex.web virtex.ch
$(FIXOTHERS) tex.p > virtex.p
virtex.ch: initex.ch
ini_to_vir initex.ch virtex.ch
#
# TRIPTEX: The version of TeX with the constants set to the special values
# needed when running the infamous and nefarious ``trip'' test.
#
triptex: triptex.o ext.o
$(PC) $(PFLAGS) -w -o triptex triptex.o ext.o $(PCLIB)
triptex.o: triptex.p
$(PC) $(PFLAGS) -S -w triptex.p
$(PC) $(PFLAGS) -w -c triptex.s
triptex.p: tex.web triptex.ch
$(TANGLE) tex.web triptex.ch
mv tex.pool triptex.pool
$(FIXOTHERS) tex.p > triptex.p
triptex.ch: initex.ch
ini_to_trip initex.ch triptex.ch
#
# Miscelaneous stuff.
#
# we would love to use the -O flag here but it seems to cause buggy
# results
ext.o: ext.c ext.h h00vars.h texpaths.h
cc -c ext.c
clean:
rm -f core
rm -f initex.o virtex.o triptex.o
rm -f initex.p virtex.p triptex.p tex.p
rm -f initex.ch virtex.ch triptex.ch
rm -f initex.s virtex.s triptex.s
rm -f ext.o
SHAR_EOF
cat << \SHAR_EOF > dist_initex.BSD4_n.ch
% Change file for Berkeley UNIX, for a hacked version of the pc pascal
% compiler (with the others: clause in case statements).
%
% Distant relation of David Fuchs' Sep 13, 1982 TOPS20 version, greatly
% modified by Howard Trickey and Pavel Curtis
% Modification History:
%
% (10/9) HWT Brought up to version 0.1
% (10/13) HWT Fixed bug in hpack
% (10/17) HWT Changed to version 0.3
% (10/22) HWT Brought up to version 0.4
% (10/26) HWT Changed to use version 0.5 source
% (11/19) HWT Changed to use version 0.8 source; fixed glue_ratios to use
% external C procedures
% (11/30) HWT Changed to use new tangle, with verbatim Pascal mode, to avoid
% need for editing in the #include statement
% (changed modules 4,9)
% (1/15/83) HWT Changed to use version 0.94 source; added Pavel's changes to
% allow undumping; added Grim's fix for grtofl, etc.;
% modified for Knuth's new tangle.
% (2/1/83) PC Consolidated with Pavel's version, changed the fl<->gr
% routines to avoid slow and messy union type.
% (3/18/83) HWT Changed to use version 0.96 source (means changing fltogr and
% grtofl to unfloat and float, then getting rid of a lot of
% changes); made TeX print a newline
% at the end of the run.
% (4/2/83) PC Added call to exit() at end of run, with exit-value dependent
% upon the value of `history'.
% (4/16/83) PC Brought up to version 0.97 of TeX.
% (5/23/83) HWT Changed mem_max to 30000 for initex (because of latex)
% (6/2/83) HWT Brought up to version 0.98 of TeX. Changed some of the
% string-related constants to match the latest tops20
% change file. Modified input_ln and write_dvi to use external
% C procedures, for speed increase. Changed file opening
% procedures to use external C procedure to test for
% accessibility, so that now none of the pc runtime library
% programs need to be modified (though close1 is still needed)
% (6/28/83) HWT Brought up to 0.99, with new change file format.
% (7/17/83) HWT Brought up to 0.999. Added switch-to-editor stuff.
% (7/29/83) HWT Brought up to 0.9999.
% (11/4/83) HWT Brought up to 0.999999.
% (11/16/83) HWT Brought up to 1.0. Upped max_strings, string_vacancies,
% pool_size, hash_size, and hash_prime, to agree with
% TOPS20-changes constants.
% (1/4/84) HWT Again, upped pool_size to 40000 for LaTeX.
% (2/18/84) HWT Made changes to use search path stuff in new ext.c. Now all
% the path specific stuff is localized to texpaths.h
% (6/6/84) HWT Brought up to 1.1. Upped pool_size and hash_size for LaTeX.
% (31/7/84) HWT Removed the forgetting of the full file name, so that
% switch-to-editor works for non-primary file.
% (11/16/84) RKF Brought up to 1.2
% (12/26/84) RKF Brought up to 1.3, consulting changes already done by
% SVB@Purdue, rusty@sdcarl, and a related file from HWT
% (3/11/85) RKF Brought up to 1.3b
% (9/2/85) RKF Brought up to 1.5 (yep, missed 1.4)
% (1/30/86) PAM brought up to 2.0
% (12/11/86) PAM commented out the patch which turns on debug. This is
% partly since debug is no longer necessary at this point of development
% but also because debug turns on range checking in the pc, and in
% recent months the pc range check has been giving bogus error
% messages.
% (2/27/87) PAM No change in working code, but noted places where SUNMakefile
% makes alterations for more efficient SUN code.
% (3/7/87) PAM Changed version number for TeX 2.1
% (9/23/87) PAM Changed version number for TeX 2.3
% (10/25/87) PAM Changed version number for TeX 2.5
% (12/5/87) PAM Changed version number for TeX 2.7
% (1/15/88) PAM Changed version number for TeX 2.9
% Use this file as is to make an INITEX. To get production TEX, use the
% shell script ``ini_to_vir'' and re-TANGLE.
% NOTE: the module numbers in this change file refer to the Version 0.999
% listing (red cover) made in July 1983.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [0] WEAVE: only print changes
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
@y
\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
\let\maybe=\iffalse
\def\title{\TeX82 changes for Berkeley {\mc UNIX}}
\def\glob{13}\def\gglob{20, 26} % these are defined in module 1
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.2] banner line
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d banner=='This is TeX, Version 2.9' {printed when \TeX\ starts}
@y
@d banner=='This is TeX, Version 2.9 for Berkeley UNIX'
{printed when \TeX\ starts}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.4] program header
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
Actually the heading shown here is not quite normal: The |program| line
does not mention any |output| file, because \ph\ would ask the \TeX\ user
to specify a file name if |output| were specified here.
@^system dependencies@>
@d mtype==t@&y@&p@&e {this is a \.{WEB} coding trick:}
@y
@d mtype==t@&y@&p@&e {this is a \.{WEB} coding trick:}
@d standard_input==i@&n@&p@&u@&t {and another}
@z
@x
program TEX; {all file names are defined dynamically}
@y
program TEX(standard_input,output); {other file names are defined dynamically}
@z
@x
var @<Global variables@>@/
@y
var @<Globals variables@>@/
@#
@\@=#include "ext.h"@>@\ {declarations for external C procedures}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.7] debug..gubed, stat..tats
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%@x
%@d debug==@{ {change this to `$\\{debug}\equiv\null$' when debugging}
%@d gubed==@t@>@} {change this to `$\\{gubed}\equiv\null$' when debugging}
%@y
%@d debug==
%@d gubed==
%@z
@x
@d stat==@{ {change this to `$\\{stat}\equiv\null$' when gathering
usage statistics}
@d tats==@t@>@} {change this to `$\\{tats}\equiv\null$' when gathering
usage statistics}
@y
@d stat==
@d tats==
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.8] init..tini
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d init== {change this to `$\\{init}\equiv\.{@@\{}$' in the production version}
@d tini== {change this to `$\\{tini}\equiv\.{@@\}}$' in the production version}
@y
@d init==
@d tini==
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.9] compiler directives
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@{@&$C-,A+,D-@} {no range check, catch arithmetic overflow, no debug overhead}
@!debug @{@&$C+,D+@}@+ gubed {but turn everything on when debugging}
@y
@=(*$C-*)@> {no range check}
@!debug @=(*$C+*)@> @+ gubed {debug with range check (may cause bogus errors)}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.10] othercases--useless on Vax, changed by sed in SUNMakefile
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% othercases target for sed
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.11] compile-time constants, use logical names
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@!mem_max=30000; {greatest index in \TeX's internal |mem| array;
must be strictly less than |max_halfword|;
must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
@!mem_min=0; {smallest index in \TeX's internal |mem| array;
must be |min_halfword| or more;
must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
@!buf_size=500; {maximum number of characters simultaneously present in
current lines of open files and in control sequences between
\.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
@!error_line=72; {width of context lines on terminal error messages}
@!half_error_line=42; {width of first lines of contexts in terminal
error messages; should be between 30 and |error_line-15|}
@!max_print_line=79; {width of longest text lines output; should be at least 60}
@!stack_size=200; {maximum number of simultaneous input sources}
@!max_in_open=6; {maximum number of input files and error insertions that
can be going on simultaneously}
@!font_max=75; {maximum internal font number; must not exceed |max_quarterword|
and must be at most |font_base+256|}
@!font_mem_size=20000; {number of words of |font_info| for all fonts}
@!param_size=60; {maximum number of simultaneous macro parameters}
@!nest_size=40; {maximum number of semantic levels simultaneously active}
@!max_strings=3000; {maximum number of strings; must not exceed |max_halfword|}
@!string_vacancies=8000; {the minimum number of characters that should be
available for the user's control sequences and font names,
after \TeX's own error messages are stored}
@!pool_size=32000; {maximum number of characters in strings, including all
error messages and help texts, and the names of all fonts and
control sequences; must exceed |string_vacancies| by the total
length of \TeX's own strings, which is currently about 23000}
@!save_size=600; {space for saving values outside of current group; must be
at most |max_halfword|}
@!trie_size=8000; {space for hyphenation patterns; should be larger for
\.{INITEX} than it is in production versions of \TeX}
@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
@!file_name_size=40; {file names shouldn't be longer than this}
@!pool_name='TeXformats:TEX.POOL ';
{string of length |file_name_size|; tells where the string pool appears}
@y
@!mem_max=30000; {greatest index in \TeX's internal |mem| array;
must be strictly less than |max_halfword|;
must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
@!mem_min=-30000; {smallest index in \TeX's internal |mem| array;
must be |min_halfword| or more;
must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
@!buf_size=500; {maximum number of characters simultaneously present in
current lines of open files and in control sequences between
\.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
@!error_line=79; {width of context lines on terminal error messages}
@!half_error_line=50; {width of first lines of contexts in terminal
error messages; should be between 30 and |error_line-15|}
@!max_print_line=79; {width of longest text lines output; should be at least 60}
@!stack_size=200; {maximum number of simultaneous input sources}
@!max_in_open=15; {maximum number of input files and error insertions that
can be going on simultaneously}
@!font_max=100; {maximum internal font number; must not exceed |max_quarterword|
and must be at most |font_base+256|}
@!font_mem_size=25000; {number of words of |font_info| for all fonts}
@!param_size=60; {maximum number of simultaneous macro parameters}
@!nest_size=40; {maximum number of semantic levels simultaneously active}
@!max_strings=4400; {maximum number of strings; must not exceed |max_halfword|}
@!string_vacancies=15000; {the minimum number of characters that should be
available for the user's control sequences and font names,
after \TeX's own error messages are stored}
@!pool_size=45000; {maximum number of characters in strings, including all
error messages and help texts, and the names of all fonts and
control sequences; must exceed |string_vacancies| by the total
length of \TeX's own strings, which is currently about 23000}
@!save_size=600; {space for saving values outside of current group; must be
at most |max_halfword|}
@!trie_size=8000; {space for hyphenation patterns; should be larger for
\.{INITEX} than it is in production versions of \TeX}
@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
@!file_name_size=1024; {file names shouldn't be longer than this}
@!pool_name='tex.pool';
{string of length |file_name_size|; the string pool name}
@.TeXformats@>
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.12] sensitive compile-time constants
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d mem_bot=0 {smallest index in the |mem| array dumped by \.{INITEX};
must not be less than |mem_min|}
@d mem_top==30000 {largest index in the |mem| array dumped by \.{INITEX};
must be substantially larger than |mem_bot|
and not greater than |mem_max|}
@d font_base=0 {smallest internal font number; must not be less
than |min_quarterword|}
@d hash_size=2100 {maximum number of control sequences; it should be at most
about |(mem_max-mem_min)/10|, but 2100 is already quite generous}
@d hash_prime=1777 {a prime number equal to about 85\% of |hash_size|}
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@y
@d mem_bot=-30000 {smallest index in the |mem| array dumped by \.{INITEX};
must not be less than |mem_min|}
@d mem_top==30000 {largest index in the |mem| array dumped by \.{INITEX};
must be substantially larger than |mem_bot|
and not greater than |mem_max|}
@d font_base=0 {smallest internal font number; must not be less
than |min_quarterword|}
@d hash_size=3000 {maximum number of control sequences; it should be at most
about |(mem_max-mem_min)/10|, but 2100 is already quite generous}
@d hash_prime=2551 {a prime number equal to about 85\%\ of |hash_size|}
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [2.23] form-feed and tab are legal characters
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@^character set dependencies@>
@^system dependencies@>
@<Set init...@>=
for i:=1 to @'37 do xchr[i]:=' ';
@y
@^character set dependencies@>
@^system dependencies@>
The code shown here is intended to be used on systems
where only the printable ascii set, along with
|carriage_return|, |tab|, and |form_feed| will show up in text files.
All |null| characters are skipped.
@d form_feed=@'14 {ascii code used at end of a page}
@d tab=@'11
@<Set initial values...@>=
for i:=1 to @'37 do xchr[i]:=' ';
xchr[form_feed]:=chr(form_feed);
xchr[tab]:=chr(tab);
xchr[null_code]:=chr(null_code);
@z
@x
for i:=first_text_char to last_text_char do xord[chr(i)]:=invalid_code;
@y
for i:=first_text_char to last_text_char do xord[chr(i)]:=invalid_code;
xord[xchr[null_code]]:=null_code;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.25] file types
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
The program actually makes use also of a third kind of file, called a
@y
The pc compiler on Berkeley {\mc UNIX} won't pack a range into one byte unless
the lower bound is |-128| or more, and the upper bound is |127| or less.
This applies to files, too. To make the program work with compiler range
checking turned on, we'll have to adjust |eight_bits| codes by sometimes
adding or subtracting |256|.
Note that |eight_bits| really takes 16 bits here.
The program actually makes use also of a third kind of file, called a
@z
@x
@!alpha_file=packed file of text_char; {files that contain textual data}
@!byte_file=packed file of eight_bits; {files that contain binary data}
@y
@!alpha_file=t@&e@&x@&t; {files that contain textual data}
@!byte_file=packed file of -128..127; {files that contain binary data}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.23] add real_name_of_file array
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
is crucial for our purposes. We shall assume that |name_of_file| is a variable
of an appropriate type such that the \PASCAL\ run-time system being used to
implement \TeX\ can open a file whose external name is specified by
|name_of_file|.
@^system dependencies@>
@<Glob...@>=
@!name_of_file:packed array[1..file_name_size] of char;@;@/
{on some systems this may be a \&{record} variable}
@!name_length:0..file_name_size;@/{this many characters are actually
relevant in |name_of_file| (the rest are blank)}
@y
is crucial for our purposes. We shall assume that |name_of_file| is a variable
of an appropriate type such that the \PASCAL\ run-time system being used to
implement \TeX\ can open a file whose external name is specified by
|name_of_file|.
The Berkeley {\mc UNIX} version uses search paths to look for files to open.
We use |real_name_of_file| to hold the |name_of_file| with a directory
name from the path in front of it.
@^system dependencies@>
@<Glob...@>=
@!name_of_file,@!real_name_of_file:packed array[1..file_name_size] of char;
@;@/
@!name_length:0..file_name_size;@/{this many characters are actually
relevant in |name_of_file| (the rest are blank)}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.27] file opening
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The \ph\ compiler with which the present version of \TeX\ was prepared has
extended the rules of \PASCAL\ in a very convenient way. To open file~|f|,
we can write
$$\vbox{\halign{#\hfil\qquad&#\hfil\cr
|reset(f,@t\\{name}@>,'/O')|&for input;\cr
|rewrite(f,@t\\{name}@>,'/O')|&for output.\cr}}$$
The `\\{name}' parameter, which is of type `{\bf packed array
$[\langle\\{any}\rangle]$ of \\{char}}', stands for the name of
the external file that is being opened for input or output.
Blank spaces that might appear in \\{name} are ignored.
The `\.{/O}' parameter tells the operating system not to issue its own
error messages if something goes wrong. If a file of the specified name
cannot be found, or if such a file cannot be opened for some other reason
(e.g., someone may already be trying to write the same file), we will have
|@!erstat(f)<>0| after an unsuccessful |reset| or |rewrite|. This allows
\TeX\ to undertake appropriate corrective action.
@:PASCAL H}{\ph@>
@^system dependencies@>
\TeX's file-opening procedures return |false| if no file identified by
|name_of_file| could be opened.
@d reset_OK(#)==erstat(#)=0
@d rewrite_OK(#)==erstat(#)=0
@p function a_open_in(var f:alpha_file):boolean;
{open a text file for input}
begin reset(f,name_of_file,'/O'); a_open_in:=reset_OK(f);
end;
@#
function a_open_out(var f:alpha_file):boolean;
{open a text file for output}
begin rewrite(f,name_of_file,'/O'); a_open_out:=rewrite_OK(f);
end;
@#
function b_open_in(var f:byte_file):boolean;
{open a binary file for input}
begin reset(f,name_of_file,'/O'); b_open_in:=reset_OK(f);
end;
@#
function b_open_out(var f:byte_file):boolean;
{open a binary file for output}
begin rewrite(f,name_of_file,'/O'); b_open_out:=rewrite_OK(f);
end;
@#
function w_open_in(var f:word_file):boolean;
{open a word file for input}
begin reset(f,name_of_file,'/O'); w_open_in:=reset_OK(f);
end;
@#
function w_open_out(var f:word_file):boolean;
{open a word file for output}
begin rewrite(f,name_of_file,'/O'); w_open_out:=rewrite_OK(f);
end;
@y
@ The \ph\ compiler with which the present version of \TeX\ was prepared has
extended the rules of \PASCAL\ in a very convenient way for file opening.
Berkeley {\mc UNIX} \PASCAL\ isn't nearly as nice as \ph.
Normally, it bombs out if a file open fails.
An external C procedure, |test_access| is used to check whether or not the
open will work. It is declared in the ``ext.h'' include file, and it returns
|true| or |false|. The |name_of_file| global holds the file name whose access
is to be tested.
The first parameter for |test_access| is the access mode,
one of |read_access_mode| or |write_access_mode|.
We also implement path searching in |test_access|: its second parameter is
one of the ``file path'' constants defined below. If |name_of_file|
doesn't start with |'/'| then |test_access| tries prepending pathnames
from the appropriate path list until success or the end of path list
is reached.
On return, |real_name_of_file| contains the original name with the path
that succeeded (if any) prepended. It is the name used in the various
open procedures.
Note that |a_open_in| has been redefined to take an additional argument,
which should be one of the ``file path'' specifiers.
Since |b_open_in| is only used for \.{TFM} files, and
|w_open_in| is only used for format files, we don't need a path specifying
argument for them.
Path searching is not done for output files.
@d read_access_mode=4 {``read'' mode for |test_access|}
@d write_access_mode=2 {``write'' mode for |test_access|}
@d no_file_path=0 {no path searching should be done}
@d input_file_path=1 {path specifier for \.{\\input} files}
@d read_file_path=2 {path specifier for \.{\\read} files}
@d font_file_path=3 {path specifier for \.{TFM} files}
@d format_file_path=4 {path specifier for format files}
@d pool_file_path=5 {path specifier for the pool file}
@p function a_open_in(var f:alpha_file;@!path_specifier:integer):boolean;
{open a text file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,path_specifier) then
begin reset(f,real_name_of_file); ok:=true@+end
else
ok:=false;
a_open_in:=ok;
end;
@#
function a_open_out(var f:alpha_file):boolean;
{open a text file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,real_name_of_file); ok:=true @+end
else ok:=false;
a_open_out:=ok;
end;
@#
function b_open_in(var f:byte_file):boolean;
{open a binary file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,font_file_path) then
begin reset(f,real_name_of_file); ok:=true @+end
else ok:=false;
b_open_in:=ok;
end;
@#
function b_open_out(var f:byte_file):boolean;
{open a binary file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,real_name_of_file); ok:=true @+end
else ok:=false;
b_open_out:=ok;
end;
@#
function w_open_in(var f:word_file):boolean;
{open a word file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,format_file_path) then
begin reset(f,real_name_of_file); ok:=true @+end
else ok:=false;
w_open_in:=ok;
end;
@#
function w_open_out(var f:word_file):boolean;
{open a word file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,name_of_file); ok:=true @+end
else ok:=false;
w_open_out:=ok;
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.28] file closing
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
This makes |f| available to be opened again, if desired; and if |f| was used for
output, the |close| operation makes the corresponding external file appear
on the user's area, ready to be read.
These procedures should not generate error messages if a file is
being closed before it has been successfully opened.
@p procedure a_close(var f:alpha_file); {close a text file}
begin close(f);
end;
@#
procedure b_close(var f:byte_file); {close a binary file}
begin close(f);
end;
@#
procedure w_close(var f:word_file); {close a word file}
begin close(f);
end;
@y
This makes |f| available to be opened again, if desired; and if |f| was used for
output, the |close| operation makes the corresponding external file appear
on the user's area, ready to be read.
With the pc library, files will be automatically closed when the program stops
and when one reopens them.
There is however, the problem of opening a file and writing it, and then
wanting to read it again, but from a different file variable.
For this purpose we use external procedures |close_a|, |close_b|, and
|close_w|.
There should be an ``include'' statement above, to declare these external
procedures.
@p procedure a_close(var f:alpha_file); {close a text file}
begin close_a(f);
end;
@#
procedure b_close(var f:byte_file); {close a binary file}
begin close_b(f);
end;
@#
procedure w_close(var f:word_file); {close a word file}
begin close_w(f);
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.31] faster version of input_ln
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
Since the inner loop of |input_ln| is part of \TeX's ``inner loop''---each
character of input comes in at this place---it is wise to reduce system
overhead by making use of special routines that read in an entire array
of characters at once, if such routines are available. The following
code uses standard \PASCAL\ to illustrate what needs to be done, but
finer tuning is often possible at well-developed \PASCAL\ sites.
@^inner loop@>
@p function input_ln(var f:alpha_file;@!bypass_eoln:boolean):boolean;
{inputs the next line or returns |false|}
var last_nonblank:0..buf_size; {|last| with trailing blanks removed}
begin if bypass_eoln then if not eof(f) then get(f);
{input the first character of the line into |f^|}
last:=first; {cf.\ Matthew 19\thinspace:\thinspace30}
if eof(f) then input_ln:=false
else begin last_nonblank:=first;
while not eoln(f) do
begin if last>=max_buf_stack then
begin max_buf_stack:=last+1;
if max_buf_stack=buf_size then
overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
end;
buffer[last]:=xord[f^]; get(f); incr(last);
if buffer[last-1]<>" " then last_nonblank:=last;
end;
last:=last_nonblank; input_ln:=true;
end;
end;
@y
Since the inner loop of |input_ln| is part of \TeX's ``inner loop''---each
character of input comes in at this place---it is wise to reduce system
overhead by making use of special routines that read in an entire array
of characters at once.
With Berkeley {\mc UNIX} we call an external C procedure, |line_read|.
That routine fills |buffer| from |first| onwards with the |xord|'ed values
of the next line, setting |last| appropriately. It will stop if
|last=buf_size|, and the following will cause an ``overflow'' abort.
We ignore the |bypass_eoln| argument, since the |line_read| procedure
will have handled bypassing the end-of-line in its previous call, if
there was one.
If one uses |input_ln| on a file, the normal |read|
and |get| routines shouldn't be used, nor the |eof| and |eoln| tests.
End of file can be tested with the external function |test_eof|.
@^inner loop@>
@p function input_ln(var f:alpha_file;@!bypass_eoln:boolean):boolean;
{inputs the next line or returns |false|}
label done;
begin
last:=first; {cf.\ Matthew 19\thinspace:\thinspace30}
if test_eof(f) then input_ln:=false
else begin last:=first;
line_read(f,buf_size);
if last>=max_buf_stack then begin
max_buf_stack:=last+1;
if max_buf_stack>=buf_size then
overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
end;
loop@+ begin if last=first then goto done;
if buffer[last-1]<>" " then goto done;
decr(last);
end;
done: input_ln:=true;
end;
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.32] term_in/out are input,output
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The user's terminal acts essentially like other files of text, except
that it is used both for input and for output. When the terminal is
considered an input file, the file variable is called |term_in|, and when it
is considered an output file the file variable is |term_out|.
@^system dependencies@>
@<Glob...@>=
@!term_in:alpha_file; {the terminal as an input file}
@!term_out:alpha_file; {the terminal as an output file}
@y
@ The user's terminal acts essentially like other files of text, except
that it is used both for input and for output. When the terminal is
considered an input file, the file is called |term_in|, and when it
is considered an output file the file is |term_out|.
For Berkeley {\mc UNIX} we use |standard_input| and |output| for these
files, as were declared in the program header. The former name
|standard_input| was defined using a web trick so that ``input'' is
produced in the Pascal file.
@d term_in==standard_input {the terminal as an input file}
@d term_out==output {the terminal as an output file}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.33] don't need to open terminal files
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ Here is how to open the terminal files
in \ph. The `\.{/I}' switch suppresses the first |get|.
@^system dependencies@>
@d t_open_in==reset(term_in,'TTY:','/O/I') {open the terminal for text input}
@d t_open_out==rewrite(term_out,'TTY:','/O') {open the terminal for text output}
@y
@ Here is how to open the terminal files
---do nothing.
@d t_open_in == {input already open for text input}
@d t_open_out == {output already open for text output}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.34] flushing output
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
these operations can be specified in \ph:
@^system dependencies@>
@d update_terminal == break(term_out) {empty the terminal output buffer}
@d clear_terminal == break_in(term_in,true) {clear the terminal input buffer}
@d wake_up_terminal == do_nothing {cancel the user's cancellation of output}
@y
these operations can be specified with Berkeley {\mc UNIX}.
@^system dependencies@>
@d update_terminal == flush(output)
@d clear_terminal == {nothing necessary on UNIX}
@d wake_up_terminal == {nothing necessary on UNIX}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.37] rescanning the command line
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The following program does the required initialization
without retrieving a possible command line.
It should be clear how to modify this routine to deal with command lines,
if the system permits them.
@^system dependencies@>
@p function init_terminal:boolean; {gets the terminal input started}
label exit;
begin t_open_in;
loop@+begin wake_up_terminal; write(term_out,'**'); update_terminal;
@.**@>
if not input_ln(term_in,true) then {this shouldn't happen}
begin write_ln(term_out);
write(term_out,'! End of file on the terminal... why?');
@.End of file on the terminal@>
init_terminal:=false; return;
end;
loc:=first;
while (loc<last)and(buffer[loc]=" ") do incr(loc);
if loc<last then
begin init_terminal:=true;
return; {return unless the line was all blank}
end;
write_ln(term_out,'Please type the name of your input file.');
end;
exit:end;
@y
@ The following program does the required initialization
and also retrieves a possible command line.
@^system dependencies@>
@p
function init_terminal:boolean; {gets the terminal input started}
label exit;
var
i, j : integer;
arg : packed array[1..100] of char;
begin
t_open_in;
if argc > 1 then begin
last := first;
for i := 1 to argc - 1 do begin
argv(i, arg);
j := 1;
while (j <= 100) and (arg[j] <> ' ') do begin
buffer[last] := xord[arg[j]];
incr(j); incr(last);
end;
if j > 1 then begin
buffer[last] := xord[' '];
incr(last);
end;
end;
if last > first then begin
loc := first;
init_terminal := true;
return;
end;
end;
loop@+begin
wake_up_terminal; write(term_out, '**'); update_terminal;
@.**@>
if not input_ln(term_in,true) then begin {this shouldn't happen}
write_ln(term_out);
write(term_out, '! End of file on the terminal... why?');
@.End of file on the terminal@>
init_terminal:=false;
return;
end;
loc:=first;
while (loc<last)and(buffer[loc]=" ") do
incr(loc);
if loc<last then begin
init_terminal:=true;
return; {return unless the line was all blank}
end;
write_ln(term_out, 'Please type the name of your input file.');
end;
exit:
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [4.51] a_open_in of pool file needs path specifier
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(pool_file) then
@y
if a_open_in(pool_file,pool_file_path) then
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [4.51,52,53] make TEX.POOL lowercase in messages
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
else bad_pool('! I can''t read TEX.POOL.')
@y
else bad_pool('! I can''t read tex.pool.')
@z
@x
begin if eof(pool_file) then bad_pool('! TEX.POOL has no check sum.');
@y
begin if eof(pool_file) then bad_pool('! tex.pool has no check sum.');
@z
@x
bad_pool('! TEX.POOL line doesn''t begin with two digits.');
@y
bad_pool('! tex.pool line doesn''t begin with two digits.');
@z
@x
bad_pool('! TEX.POOL check sum doesn''t have nine digits.');
@y
bad_pool('! tex.pool check sum doesn''t have nine digits.');
@z
@x
done: if a<>@$ then bad_pool('! TEX.POOL doesn''t match; TANGLE me again.');
@y
done: if a<>@$ then bad_pool('! tex.pool doesn''t match; tangle me again.');
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [6.84] switch-to-editor option
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
line ready to be edited. But such an extension requires some system
wizardry, so the present implementation simply types out what file should be
edited and the relevant line number.
@^system dependencies@>
There is a secret `\.D' option available when the debugging routines have
not been commented out.
@^debugging@>
@y
line ready to be edited.
We do this by calling the external procedure |calledit| with a pointer to
the filename, its length, and the line number.
However, here we just set up the variables that will be used as arguments,
since we don't want to do the switch-to-editor until after TeX has closed
its files.
@^system dependencies@>
There is a secret `\.D' option available when the debugging routines have
not been commented out.
@^debugging@>
@d edit_file==input_stack[base_ptr]
@z
@x
"E": if base_ptr>0 then
begin print_nl("You want to edit file ");
@.You want to edit file x@>
print(input_stack[base_ptr].name_field);
print(" at line "); print_int(line);
interaction:=scroll_mode; jump_out;
@y
"E": if base_ptr>0 then
begin
edit_name_start:=str_start[edit_file.name_field];
edit_name_length:=str_start[edit_file.name_field+1] -
str_start[edit_file.name_field];
edit_line:=line;
jump_out;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [7.109] glue_ratio
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
routines cited there must be modified to allow negative glue ratios.)
@^system dependencies@>
@d set_glue_ratio_zero(#) == #:=0.0 {store the representation of zero ratio}
@d set_glue_ratio_one(#) == #:=1.0 {store the representation of unit ratio}
@d float(#) == # {convert from |glue_ratio| to type |real|}
@d unfloat(#) == # {convert from |real| to type |glue_ratio|}
@d float_constant(#) == #.0 {convert |integer| constant to |real|}
@<Types...@>=
@!glue_ratio=real; {one-word representation of a glue expansion factor}
@y
routines cited there must be modified to allow negative glue ratios.)
On the Vax, the Berkeley {\mc UNIX} pc compiler won't let us use reals of
less than eight
bytes. We will pretend that a |glue_ratio| is an |integer|, but we will
really store |short_real|'s in them. This will be accomplished by using
external C procedures to store into and retrieve from |glue_ratio|'s.
The source uses macros |unfloat| and |float| for these purposes. We need
to change the word ``float'' before it is written out, because that is a
reserved word in C.
The Sun, at least since the issue of O.S. version 3.0, is more accommodating
and offers a |shortreal| type. To keep from having to maintain two different
\.{dist_initex.ch} files, we leave the file alone, and make the necessary
changes in the definition of |float|, |unfloat| and related macros through
the agency of a sed script in the Makefile.
@^system dependencies@>
@d float(#)==tofloat(#)
@d set_glue_ratio_zero(#)==#:=unfloat(0.0)
@d set_glue_ratio_one(#)==#:=unfloat(1.0) {SUN sed target}
@d float_constant(#) == #.0 {convert |integer| constant to |real|}
@<Types...@>=
@!glue_ratio = integer; {one-word representation of a glue expansion factor}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [8.110] ranges for quarter,half words
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if the subrange is `|-128..127|'.
The present implementation tries to accommodate as many variations as possible,
so it makes rather general assumptions. If integers having the subrange
`|min_quarterword..max_quarterword|' can be packed into a quarterword,
and if integers having the subrange `|min_halfword..max_halfword|'
can be packed into a halfword, everything should work satisfactorily.
It is usually most efficient to have |min_quarterword=min_halfword=0|,
so one should try to achieve this unless it causes a severe problem.
The values defined here are recommended for most 32-bit computers.
@d min_quarterword=0 {smallest allowable value in a |quarterword|}
@d max_quarterword=255 {largest allowable value in a |quarterword|}
@d min_halfword==0 {smallest allowable value in a |halfword|}
@d max_halfword==65535 {largest allowable value in a |halfword|}
@y
if the subrange is `|-128..127|'.
For Berkeley {\mc UNIX} we need to do the |-128..127| kind of range.
@d min_quarterword=-128 {smallest allowable value in a |quarterword|}
@d max_quarterword=127 {largest allowable value in a |quarterword|}
@d min_halfword==-32768 {smallest allowable value in a |halfword|}
@d max_halfword==32767 {largest allowable value in a |halfword|}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [11.165] fix the word "free" so that it doesn't conflict with a runtime proc
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
been included. (You may want to decrease the size of |mem| while you
@^debugging@>
are debugging.)
@y
been included. (You may want to decrease the size of |mem| while you
@^debugging@>
are debugging.)
@d free==free_arr
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [12.186] glue_ratio fix
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
floating point underflow on the author's computer.
@^system dependencies@>
@^dirty \PASCAL@>
@<Display the value of |glue_set(p)|@>=
g:=float(glue_set(p));
if (g<>float_constant(0))and(glue_sign(p)<>normal) then
begin print(", glue set ");
if glue_sign(p)=shrinking then print("- ");
if abs(mem[p+glue_offset].int)<@'4000000 then print("?.?")
else if abs(g)>float_constant(20000) then
begin if g>float_constant(0) then print_char(">")
else print("< -");
print_glue(20000*unity,glue_order(p),0);
end
else print_glue(round(unity*g),glue_order(p),0);
@^real multiplication@>
end
@y
floating point underflow on the author's computer.
For the {\mc VAX}, the only possible random value that could hurt is
a reserved value with 1 in the sign bit and 0 for the (excess) exponent.
Because the sign-plus-exponent is in the middle of the word, the chances
of this happening are miniscule, and ignored here.
@^system dependencies@>
@^dirty \PASCAL@>
@<Display the value of |glue_set(p)|@>=
g:=float(glue_set(p));
if (g<>float_constant(0))and(glue_sign(p)<>normal) then
begin print(", glue set ");
if glue_sign(p)=shrinking then print("- ");
if abs(float(glue_set(p)))>20000.0 then
begin if float(glue_set(p))>0 then print_char(">")
else print("< -");
print_glue(20000*unity,glue_order(p),0);
end
else print_glue(round(float(glue_set(p))*unity),glue_order(p),0);
@^real multiplication@>
end
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [17.241] fix_date_and_time
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The following procedure, which is called just before \TeX\ initializes its
input and output, establishes the initial values of the date and time.
@^system dependencies@>
Since standard \PASCAL\ cannot provide such information, something special
is needed. The program here simply specifies July 4, 1776, at noon; but
users probably want a better approximation to the truth.
@p procedure fix_date_and_time;
begin time:=12*60; {minutes since midnight}
day:=4; {fourth day of the month}
month:=7; {seventh month of the year}
year:=1776; {Anno Domini}
end;
@y
@ The following procedure, which is called just before \TeX\ initializes its
input and output, establishes the initial values of the date and time.
It is calls an externally defined |date_and_time|, even though it could
be done from Pascal.
The external procedure also sets up interrupt catching.
@^system dependencies@>
@p procedure fix_date_and_time;
begin
date_and_time(time,day,month,year);
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.513] area and extension rules
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The file names we shall deal with for illustrative purposes have the
following structure: If the name contains `\.>' or `\.:', the file area
consists of all characters up to and including the final such character;
otherwise the file area is null. If the remaining file name contains
`\..', the file extension consists of all such characters from the first
remaining `\..' to the end, otherwise the file extension is null.
@^system dependencies@>
We can scan such file names easily by using two global variables that keep track
of the occurrences of area and extension delimiters:
@<Glob...@>=
@!area_delimiter:pool_pointer; {the most recent `\.>' or `\.:', if any}
@!ext_delimiter:pool_pointer; {the relevant `\..', if any}
@y
@ The file names we shall deal with for illustrative purposes have the
following structure: If the name contains `\./', the file area
consists of all characters up to and including the final such character;
otherwise the file area is null. If the remaining file name contains
`\..', the file extension consists of all such characters from the first
remaining `\..' to the end, otherwise the file extension is null.
@^system dependencies@>
We can scan such file names easily by using two global variables that keep
track of the occurrences of area and extension delimiters:
@<Glob...@>=
@!area_delimiter:pool_pointer; {the most recent `\./', if any}
@!ext_delimiter:pool_pointer; {the most recent `\..', if any}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.514] TEX area directories
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d TEX_area=="TeXinputs:"
@.TeXinputs@>
@d TEX_font_area=="TeXfonts:"
@.TeXfonts@>
@y
Under Berkeley {\mc UNIX}, the default paths are specified in a seprate
file, ``texpaths.h''. The file opening procedures do path searching
based either on those default paths, or on paths given by the user
in ``environment'' variables.
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.516] more_name
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
else begin if (c=">")or(c=":") then
@y
else begin if (c="/") then
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.520] default format
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d format_default_length=20 {length of the |TEX_format_default| string}
@d format_area_length=11 {length of its area part}
@d format_ext_length=4 {length of its `\.{.fmt}' part}
@y
Under Berkeley {\mc UNIX} we don't give the area part, instead depending
on the path searching that will happen during file opening.
@d format_default_length=9 {length of the |TEX_format_default| string}
@d format_area_length=0 {length of its area part}
@d format_ext_length=4 {length of its `\.{.fmt}' part}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.521] plain format location
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
TEX_format_default:='TeXformats:plain.fmt';
@y
TEX_format_default:='plain.fmt';
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.524] format file opening: only try once, with path search
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
pack_buffered_name(0,loc,j-1); {try first without the system file area}
if w_open_in(fmt_file) then goto found;
pack_buffered_name(format_area_length,loc,j-1);
{now try the system format file area}
if w_open_in(fmt_file) then goto found;
@y
pack_buffered_name(0,loc,j-1);
if w_open_in(fmt_file) then goto found;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.525] make_name_string
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
which simply makes a \TeX\ string from the value of |name_of_file|, should
ideally be changed to deduce the full name of file~|f|, which is the file
most recently opened, if it is possible to do this in a \PASCAL\ program.
@^system dependencies@>
This routine might be called after string memory has overflowed, hence
we dare not use `|str_room|'.
@p function make_name_string:str_number;
var k:1..file_name_size; {index into |name_of_file|}
begin if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings) then
make_name_string:="?"
else begin for k:=1 to name_length do append_char(xord[name_of_file[k]]);
make_name_string:=make_string;
end;
end;
@y
which simply makes a \TeX\ string from the value of |name_of_file|, should
ideally be changed to deduce the full name of file~|f|, which is the file
most recently opened, if it is possible to do this in a \PASCAL\ program.
With the Berkeley {\mc UNIX} version, we know that |real_name_of_file|
contains |name_of_file| prepended with the directory name that was found
by path searching.
If |real_name_of_file| starts with |'./'|, we don't use that part of the
name, since {\mc UNIX} users understand that.
@^system dependencies@>
This routine might be called after string memory has overflowed, hence
we dare not use `|str_room|'.
@p function make_name_string:str_number;
var k,@!kstart:1..file_name_size; {index into |name_of_file|}
begin
k:=1;
while (k<file_name_size) and (xord[real_name_of_file[k]]<>" ") do
incr(k);
name_length:=k-1; {the real |name_length|}
if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings) then
make_name_string:="?"
else begin
if (xord[real_name_of_file[1]]=".") and (xord[real_name_of_file[2]]="/") then
kstart:=3
else
kstart:=1;
for k:=kstart to name_length do append_char(xord[real_name_of_file[k]]);
make_name_string:=make_string;
end
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.537] a_open_in of \input file needs path selector
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(cur_file) then goto done;
if cur_area="" then
begin pack_file_name(cur_name,TEX_area,cur_ext);
if a_open_in(cur_file) then goto done;
end;
@y
if a_open_in(cur_file,input_file_path) then goto done;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.537] get rid of return of name to string pool
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if name=str_ptr-1 then {we can conserve string pool space now}
begin flush_string; name:=cur_name;
end;
@y
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [30.563] opening tfm file: now path searching is done
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Set temp_int to value of first byte
@x
@ @<Open |tfm_file| for input@>=
file_opened:=false;
if aire="" then pack_file_name(nom,TEX_font_area,".tfm")
else pack_file_name(nom,aire,".tfm");
if not b_open_in(tfm_file) then abort;
file_opened:=true
@y
@ @<Open |tfm_file| for input@>=
file_opened:=false;
pack_file_name(nom,aire,".tfm");
if not b_open_in(tfm_file) then abort;
begin temp_int:=tfm_file^;
if temp_int<0 then temp_int:=temp_int+256;
end;
file_opened:=true
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [30.564] reading the tfm file
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d fget==get(tfm_file)
@d fbyte==tfm_file^
@y
For Berkeley {\mc UNIX} we had to make the |byte_file| type have data in the
range |-128..127|.
If the file byte contains |@'377|, we want to regard this as 255 in decimal.
However if we do |i:=tfm_file^| on that byte, where i is a signed integer,
then the result is |i=-1|.
File bytes with values |<@'200| are read properly.
The solution is to do the assignment as shown, and then add 256 to values
less than 0.
We could also assign to |eight_bits| values, but this causes an error if
runtime checking is turned on.
The integer |temp_int| will be added to global variables at the end,
where it won't disturb module numbering.
@d fget==begin get(tfm_file);
temp_int:=tfm_file^;
if temp_int<0 then temp_int:=temp_int+256;
end
@d fbyte==temp_int
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [32.597] write_dvi
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@p procedure write_dvi(@!a,@!b:dvi_index);
var k:dvi_index;
begin for k:=a to b do write(dvi_file,dvi_buf[k]);
end;
@y
For Berkeley {\mc UNIX}, this is going to be handled by an external procedure,
|writedvi|, which will do the output using |fwrite|.
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [49.1275] a_open_in of \read file needs path specifier
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(read_file[n]) then read_open[n]:=just_open;
@y
if a_open_in(read_file[n],read_file_path) then read_open[n]:=just_open;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [51.1332] Add call to exit() depending upon value of `history'
% Also, add call to set_paths
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ Now this is really it: \TeX\ starts and ends here.
The initial test involving |ready_already| should be deleted if the
\PASCAL\ runtime system is smart enough to detect such a ``mistake.''
@y
@ Now this is really it: \TeX\ starts and ends here.
Use the value of |history| to determine what exit-code to use. We use
1 if |history <> spotless| and 0 otherwise.
@d UNIXexit==e@&x@&i@&t
@z
@x
t_open_out; {open the terminal for output}
@y
t_open_out; {open the terminal for output}
set_paths;
@z
@x
final_end: ready_already:=0;
@y
final_end: ready_already:=0;
if (history <> spotless) and (history <> warning_issued) then
UNIXexit(1)
else
UNIXexit(0);
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [51.1333] print new line before termination; switch to editor if nec.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
print(log_name); print_char(".");
end;
end;
@y
print(log_name); print_char(".");
end;
end;
print_ln;
if (edit_name_start<>0) and (interaction>batch_mode) then
calledit(str_pool[edit_name_start],edit_name_length,edit_line);
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [54.1376] add temp_int and editor-switch variables to globals
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
\f
@* \[54] System-dependent changes.
This section should be replaced, if necessary, by changes to the program
that are necessary to make \TeX\ work at a particular installation.
It is usually best to design your change file so that all changes to
previous sections preserve the section numbering; then everybody's version
will be consistent with the published program. More extensive changes,
which introduce new sections, can be inserted here; then only the index
itself will get a new section number.
@^system dependencies@>
@y
\f
@* \[54] System-dependent changes.
Here is a temporary integer, used as a holder during reading and writing of
TFM files.
Also, the variables used to hold ``switch-to-editor'' information.
@^system dependencies@>
@<Globals...@>=
@!temp_int:integer;
@!edit_name_start: pool_pointer;
@!edit_name_length,@!edit_line: integer;
@ The |edit_name_start| will be set to point into |str_pool| somewhere after
its beginning if \TeX\ is supposed to switch to an editor on exit.
@<Set init...@>=
edit_name_start:=0;
@z
SHAR_EOF
cat << \SHAR_EOF > dist_initex.PYR.ch
% Change file for Berkeley UNIX, for a hacked version of the pc pascal
% compiler (with the others: clause in case statements).
%
% Distant relation of David Fuchs' Sep 13, 1982 TOPS20 version, greatly
% modified by Howard Trickey and Pavel Curtis
% Modification History:
%
% (10/9) HWT Brought up to version 0.1
% (10/13) HWT Fixed bug in hpack
% (10/17) HWT Changed to version 0.3
% (10/22) HWT Brought up to version 0.4
% (10/26) HWT Changed to use version 0.5 source
% (11/19) HWT Changed to use version 0.8 source; fixed glue_ratios to use
% external C procedures
% (11/30) HWT Changed to use new tangle, with verbatim Pascal mode, to avoid
% need for editing in the #include statement
% (changed modules 4,9)
% (1/15/83) HWT Changed to use version 0.94 source; added Pavel's changes to
% allow undumping; added Grim's fix for grtofl, etc.;
% modified for Knuth's new tangle.
% (2/1/83) PC Consolidated with Pavel's version, changed the fl<->gr
% routines to avoid slow and messy union type.
% (3/18/83) HWT Changed to use version 0.96 source (means changing fltogr and
% grtofl to unfloat and float, then getting rid of a lot of
% changes); made TeX print a newline
% at the end of the run.
% (4/2/83) PC Added call to exit() at end of run, with exit-value dependent
% upon the value of `history'.
% (4/16/83) PC Brought up to version 0.97 of TeX.
% (5/23/83) HWT Changed mem_max to 30000 for initex (because of latex)
% (6/2/83) HWT Brought up to version 0.98 of TeX. Changed some of the
% string-related constants to match the latest tops20
% change file. Modified input_ln and write_dvi to use external
% C procedures, for speed increase. Changed file opening
% procedures to use external C procedure to test for
% accessibility, so that now none of the pc runtime library
% programs need to be modified (though close1 is still needed)
% (6/28/83) HWT Brought up to 0.99, with new change file format.
% (7/17/83) HWT Brought up to 0.999. Added switch-to-editor stuff.
% (7/29/83) HWT Brought up to 0.9999.
% (11/4/83) HWT Brought up to 0.999999.
% (11/16/83) HWT Brought up to 1.0. Upped max_strings, string_vacancies,
% pool_size, hash_size, and hash_prime, to agree with
% TOPS20-changes constants.
% (1/4/84) HWT Again, upped pool_size to 40000 for LaTeX.
% (2/18/84) HWT Made changes to use search path stuff in new ext.c. Now all
% the path specific stuff is localized to texpaths.h
% (6/6/84) HWT Brought up to 1.1. Upped pool_size and hash_size for LaTeX.
% (31/7/84) HWT Removed the forgetting of the full file name, so that
% switch-to-editor works for non-primary file.
% (11/16/84) RKF Brought up to 1.2
% (12/26/84) RKF Brought up to 1.3, consulting changes already done by
% SVB@Purdue, rusty@sdcarl, and a related file from HWT
% (3/11/85) RKF Brought up to 1.3b
% (9/2/85) RKF Brought up to 1.5 (yep,missed 1.4)
% (7/85) Mike Urban adjusted for Pyramid OSx 2.5 (binary runs on 2.4)
% (3/86) P. MacKay made cosmetic upgrade to 2.0
% (3/87) P. MacKay made cosmetic upgrade to 2.1
% (9/23/87) PAM Changed version number for TeX 2.3
% (10/25/87) PAM Changed version number for TeX 2.5
% (12/5/87) PAM Changed version number for TeX 2.7
% (1987) Simpson at TRW made slight adjustment for Pyramid OS4
% (1/15/88) PAM Changed version number for TeX 2.9
% Use this file as is to make an INITEX. To get production TEX, use the
% shell script ``ini_to_vir'' and re-TANGLE.
% NOTE: the module numbers in this change file refer to the Version 0.999
% listing (red cover) made in July 1983.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [0] WEAVE: only print changes
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
@y
\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
\let\maybe=\iffalse
\def\title{\TeX82 changes for Pyramid {\mc UNIX}}
\def\glob{13}\def\gglob{20, 26} % these are defined in module 1
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.2] banner line
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d banner=='This is TeX, Version 2.9' {printed when \TeX\ starts}
@y
@d banner=='This is TeX, Version 2.9 for Pyramid OSx'
{printed when \TeX\ starts}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.4] program header
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
Actually the heading shown here is not quite normal: The |program| line
does not mention any |output| file, because \ph\ would ask the \TeX\ user
to specify a file name if |output| were specified here.
@^system dependencies@>
@d mtype==t@&y@&p@&e {this is a \.{WEB} coding trick:}
@y
@d mtype==t@&y@&p@&e {this is a \.{WEB} coding trick:}
@d standard_input==i@&n@&p@&u@&t {and another}
@z
@x
program TEX; {all file names are defined dynamically}
@y
program TEX(standard_input,output); {other file names are defined dynamically}
@z
@x
var @<Global variables@>@/
@y
var @<Globals variables@>@/
@#
@\@=#include "ext.h"@>@\ {declarations for external C procedures}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.7] debug..gubed, stat..tats
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d debug==@{ {change this to `$\\{debug}\equiv\null$' when debugging}
@d gubed==@t@>@} {change this to `$\\{gubed}\equiv\null$' when debugging}
@y
@d debug==
@d gubed==
@z
@x
@d stat==@{ {change this to `$\\{stat}\equiv\null$' when gathering
usage statistics}
@d tats==@t@>@} {change this to `$\\{tats}\equiv\null$' when gathering
usage statistics}
@y
@d stat==
@d tats==
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.8] init..tini
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d init== {change this to `$\\{init}\equiv\.{@@\{}$' in the production version}
@d tini== {change this to `$\\{tini}\equiv\.{@@\}}$' in the production version}
@y
@d init==
@d tini==
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.9] compiler directives
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@{@&$C-,A+,D-@} {no range check, catch arithmetic overflow, no debug overhead}
@!debug @{@&$C+,D+@}@+ gubed {but turn everything on when debugging}
@y
@=(*$C-*)@> {no range check}
@!debug @=(*$C+*)@> @+ gubed {but turn everything on when debugging}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.10] Pyramid form of "others:"
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d othercases == others: {default for cases not listed explicitly}
@d endcases == @+end {follows the default case in an extended |case| statement}
@f othercases == else
@f endcases == end
@y
@d othercases == otherwise: {default for cases not listed explicitly}
@d endcases == @+end {follows the default case in an extended |case| statement}
@f othercases == else
@f endcases == end
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.11] compile-time constants, use logical names
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@!mem_max=30000; {greatest index in \TeX's internal |mem| array;
must be strictly less than |max_halfword|;
must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
@!mem_min=0; {smallest index in \TeX's internal |mem| array;
must be |min_halfword| or more;
must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
@!buf_size=500; {maximum number of characters simultaneously present in
current lines of open files and in control sequences between
\.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
@!error_line=72; {width of context lines on terminal error messages}
@!half_error_line=42; {width of first lines of contexts in terminal
error messages; should be between 30 and |error_line-15|}
@!max_print_line=79; {width of longest text lines output; should be at least 60}
@!stack_size=200; {maximum number of simultaneous input sources}
@!max_in_open=6; {maximum number of input files and error insertions that
can be going on simultaneously}
@!font_max=75; {maximum internal font number; must not exceed |max_quarterword|
and must be at most |font_base+256|}
@!font_mem_size=20000; {number of words of |font_info| for all fonts}
@!param_size=60; {maximum number of simultaneous macro parameters}
@!nest_size=40; {maximum number of semantic levels simultaneously active}
@!max_strings=3000; {maximum number of strings; must not exceed |max_halfword|}
@!string_vacancies=8000; {the minimum number of characters that should be
available for the user's control sequences and font names,
after \TeX's own error messages are stored}
@!pool_size=32000; {maximum number of characters in strings, including all
error messages and help texts, and the names of all fonts and
control sequences; must exceed |string_vacancies| by the total
length of \TeX's own strings, which is currently about 23000}
@!save_size=600; {space for saving values outside of current group; must be
at most |max_halfword|}
@!trie_size=8000; {space for hyphenation patterns; should be larger for
\.{INITEX} than it is in production versions of \TeX}
@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
@!file_name_size=40; {file names shouldn't be longer than this}
@!pool_name='TeXformats:TEX.POOL ';
{string of length |file_name_size|; tells where the string pool appears}
@y
@!mem_max=60000; {greatest index in \TeX's internal |mem| array;
must be strictly less than |max_halfword|;
must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
@!mem_min=0; {smallest index in \TeX's internal |mem| array;
must be |min_halfword| or more;
must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
@!buf_size=500; {maximum number of characters simultaneously present in
current lines of open files and in control sequences between
\.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
@!error_line=79; {width of context lines on terminal error messages}
@!half_error_line=50; {width of first lines of contexts in terminal
error messages; should be between 30 and |error_line-15|}
@!max_print_line=79; {width of longest text lines output; should be at least 60}
@!stack_size=200; {maximum number of simultaneous input sources}
@!max_in_open=15; {maximum number of input files and error insertions that
can be going on simultaneously}
@!font_max=100; {maximum internal font number; must not exceed |max_quarterword|
and must be at most |font_base+256|}
@!font_mem_size=25000; {number of words of |font_info| for all fonts}
@!param_size=60; {maximum number of simultaneous macro parameters}
@!nest_size=40; {maximum number of semantic levels simultaneously active}
@!max_strings=4400; {maximum number of strings; must not exceed |max_halfword|}
@!string_vacancies=15000; {the minimum number of characters that should be
available for the user's control sequences and font names,
after \TeX's own error messages are stored}
@!pool_size=45000; {maximum number of characters in strings, including all
error messages and help texts, and the names of all fonts and
control sequences; must exceed |string_vacancies| by the total
length of \TeX's own strings, which is currently about 23000}
@!save_size=600; {space for saving values outside of current group; must be
at most |max_halfword|}
@!trie_size=8000; {space for hyphenation patterns; should be larger for
\.{INITEX} than it is in production versions of \TeX}
@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
@!file_name_size=1024; {file names shouldn't be longer than this}
@!pool_name='tex.pool';
{string of length |file_name_size|; the string pool name}
@.TeXformats@>
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.12] sensitive compile-time constants
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d mem_bot=0 {smallest index in the |mem| array dumped by \.{INITEX};
must not be less than |mem_min|}
@d mem_top==30000 {largest index in the |mem| array dumped by \.{INITEX};
must be substantially larger than |mem_bot|
and not greater than |mem_max|}
@d font_base=0 {smallest internal font number; must not be less
than |min_quarterword|}
@d hash_size=2100 {maximum number of control sequences; it should be at most
about |(mem_max-mem_min)/10|, but 2100 is already quite generous}
@d hash_prime=1777 {a prime number equal to about 85\% of |hash_size|}
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@y
@d mem_bot=0 {smallest index in the |mem| array dumped by \.{INITEX};
must not be less than |mem_min|}
@d mem_top==60000 {largest index in the |mem| array dumped by \.{INITEX};
must be substantially larger than |mem_bot|
and not greater than |mem_max|}
@d font_base=0 {smallest internal font number; must not be less
than |min_quarterword|}
@d hash_size=3000 {maximum number of control sequences; it should be at most
about |(mem_max-mem_min)/10|, but 2100 is already quite generous}
@d hash_prime=2551 {a prime number equal to about 85\%\ of |hash_size|}
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [2.23] form-feed and tab are legal characters
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@^character set dependencies@>
@^system dependencies@>
@<Set init...@>=
for i:=1 to @'37 do xchr[i]:=' ';
@y
@^character set dependencies@>
@^system dependencies@>
The code shown here is intended to be used on systems
where only the printable ascii set, along with
|carriage_return|, |tab|, and |form_feed| will show up in text files.
All |null| characters are skipped.
@d form_feed=@'14 {ascii code used at end of a page}
@d tab=@'11
@<Set initial values...@>=
for i:=1 to @'37 do xchr[i]:=' ';
xchr[form_feed]:=chr(form_feed);
xchr[tab]:=chr(tab);
xchr[null_code]:=chr(null_code);
@z
@x
for i:=first_text_char to last_text_char do xord[chr(i)]:=invalid_code;
@y
for i:=first_text_char to last_text_char do xord[chr(i)]:=invalid_code;
xord[xchr[null_code]]:=null_code;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.25] file types
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
The program actually makes use also of a third kind of file, called a
@y
The {\it pascal\/}
compiler on Pyramid OSx won't pack ranges into one byte; evidently the
only data type that occupies one byte is |char|, so we use |ord| whenever
we convert in our out.
Note that |eight_bits| really takes 32 bits here.
The program actually makes use also of a third kind of file, called a
@z
@x
@!alpha_file=packed file of text_char; {files that contain textual data}
@!byte_file=packed file of eight_bits; {files that contain binary data}
@y
@!alpha_file=t@&e@&x@&t; {files that contain textual data}
@!byte_file=packed file of char; {files that contain binary data}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.23] add real_name_of_file array
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
is crucial for our purposes. We shall assume that |name_of_file| is a variable
of an appropriate type such that the \PASCAL\ run-time system being used to
implement \TeX\ can open a file whose external name is specified by
|name_of_file|.
@^system dependencies@>
@<Glob...@>=
@!name_of_file:packed array[1..file_name_size] of char;@;@/
{on some systems this may be a \&{record} variable}
@!name_length:0..file_name_size;@/{this many characters are actually
relevant in |name_of_file| (the rest are blank)}
@y
is crucial for our purposes. We shall assume that |name_of_file| is a variable
of an appropriate type such that the \PASCAL\ run-time system being used to
implement \TeX\ can open a file whose external name is specified by
|name_of_file|.
The 4.2bsd {\mc UNIX} version uses search paths to look for files to open.
We use |real_name_of_file| to hold the |name_of_file| with a directory
name from the path in front of it.
@^system dependencies@>
@<Glob...@>=
@!name_of_file,@!real_name_of_file:packed array[1..file_name_size] of char;
@;@/
@!name_length:0..file_name_size;@/{this many characters are actually
relevant in |name_of_file| (the rest are blank)}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.27] file opening
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The \ph\ compiler with which the present version of \TeX\ was prepared has
extended the rules of \PASCAL\ in a very convenient way. To open file~|f|,
we can write
$$\vbox{\halign{#\hfil\qquad&#\hfil\cr
|reset(f,@t\\{name}@>,'/O')|&for input;\cr
|rewrite(f,@t\\{name}@>,'/O')|&for output.\cr}}$$
The `\\{name}' parameter, which is of type `{\bf packed array
$[\langle\\{any}\rangle]$ of \\{char}}', stands for the name of
the external file that is being opened for input or output.
Blank spaces that might appear in \\{name} are ignored.
The `\.{/O}' parameter tells the operating system not to issue its own
error messages if something goes wrong. If a file of the specified name
cannot be found, or if such a file cannot be opened for some other reason
(e.g., someone may already be trying to write the same file), we will have
|@!erstat(f)<>0| after an unsuccessful |reset| or |rewrite|. This allows
\TeX\ to undertake appropriate corrective action.
@:PASCAL H}{\ph@>
@^system dependencies@>
\TeX's file-opening procedures return |false| if no file identified by
|name_of_file| could be opened.
@d reset_OK(#)==erstat(#)=0
@d rewrite_OK(#)==erstat(#)=0
@p function a_open_in(var f:alpha_file):boolean;
{open a text file for input}
begin reset(f,name_of_file,'/O'); a_open_in:=reset_OK(f);
end;
@#
function a_open_out(var f:alpha_file):boolean;
{open a text file for output}
begin rewrite(f,name_of_file,'/O'); a_open_out:=rewrite_OK(f);
end;
@#
function b_open_in(var f:byte_file):boolean;
{open a binary file for input}
begin reset(f,name_of_file,'/O'); b_open_in:=reset_OK(f);
end;
@#
function b_open_out(var f:byte_file):boolean;
{open a binary file for output}
begin rewrite(f,name_of_file,'/O'); b_open_out:=rewrite_OK(f);
end;
@#
function w_open_in(var f:word_file):boolean;
{open a word file for input}
begin reset(f,name_of_file,'/O'); w_open_in:=reset_OK(f);
end;
@#
function w_open_out(var f:word_file):boolean;
{open a word file for output}
begin rewrite(f,name_of_file,'/O'); w_open_out:=rewrite_OK(f);
end;
@y
@ The \ph\ compiler with which the present version of \TeX\ was prepared has
extended the rules of \PASCAL\ in a very convenient way for file opening.
4.2bsd {\mc UNIX} \PASCAL\ isn't nearly as nice as \ph.
Normally, it bombs out if a file open fails.
An external C procedure, |test_access| is used to check whether or not the
open will work. It is declared in the ``ext.h'' include file, and it returns
|true| or |false|. The |name_of_file| global holds the file name whose access
is to be tested.
The first parameter for |test_access| is the access mode,
one of |read_access_mode| or |write_access_mode|.
We also implement path searching in |test_access|: its second parameter is
one of the ``file path'' constants defined below. If |name_of_file|
doesn't start with |'/'| then |test_access| tries prepending pathnames
from the appropriate path list until success or the end of path list
is reached.
On return, |real_name_of_file| contains the original name with the path
that succeeded (if any) prepended. It is the name used in the various
open procedures.
Note that |a_open_in| has been redefined to take an additional argument,
which should be one of the ``file path'' specifiers.
Since |b_open_in| is only used for \.{TFM} files, and
|w_open_in| is only used for format files, we don't need a path specifying
argument for them.
Path searching is not done for output files.
@d read_access_mode=4 {``read'' mode for |test_access|}
@d write_access_mode=2 {``write'' mode for |test_access|}
@d no_file_path=0 {no path searching should be done}
@d input_file_path=1 {path specifier for \.{\\input} files}
@d read_file_path=2 {path specifier for \.{\\read} files}
@d font_file_path=3 {path specifier for \.{TFM} files}
@d format_file_path=4 {path specifier for format files}
@d pool_file_path=5 {path specifier for the pool file}
@p function a_open_in(var f:alpha_file;@!path_specifier:integer):boolean;
{open a text file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,path_specifier) then
begin reset(f,real_name_of_file); ok:=true@+end
else
ok:=false;
a_open_in:=ok;
end;
@#
function a_open_out(var f:alpha_file):boolean;
{open a text file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,real_name_of_file); ok:=true @+end
else ok:=false;
a_open_out:=ok;
end;
@#
function b_open_in(var f:byte_file):boolean;
{open a binary file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,font_file_path) then
begin reset(f,real_name_of_file); ok:=true @+end
else ok:=false;
b_open_in:=ok;
end;
@#
function b_open_out(var f:byte_file):boolean;
{open a binary file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,real_name_of_file); ok:=true @+end
else ok:=false;
b_open_out:=ok;
end;
@#
function w_open_in(var f:word_file):boolean;
{open a word file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,format_file_path) then
begin reset(f,real_name_of_file); ok:=true @+end
else ok:=false;
w_open_in:=ok;
end;
@#
function w_open_out(var f:word_file):boolean;
{open a word file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,name_of_file); ok:=true @+end
else ok:=false;
w_open_out:=ok;
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.28] file closing
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
This makes |f| available to be opened again, if desired; and if |f| was used for
output, the |close| operation makes the corresponding external file appear
on the user's area, ready to be read.
These procedures should not generate error messages if a file is
being closed before it has been successfully opened.
@p procedure a_close(var f:alpha_file); {close a text file}
begin close(f);
end;
@#
procedure b_close(var f:byte_file); {close a binary file}
begin close(f);
end;
@#
procedure w_close(var f:word_file); {close a word file}
begin close(f);
end;
@y
This makes |f| available to be opened again, if desired; and if |f| was used for
output, the |close| operation makes the corresponding external file appear
on the user's area, ready to be read.
With the pc library, files will be automatically closed when the program stops
and when one reopens them.
There is however, the problem of opening a file and writing it, and then
wanting to read it again, but from a different file variable.
For this purpose we use external procedures |close_a|, |close_b|, and
|close_w|.
There should be an ``include'' statement above, to declare these external
procedures.
@p procedure a_close(var f:alpha_file); {close a text file}
begin close_a(f);
end;
@#
procedure b_close(var f:byte_file); {close a binary file}
begin close_b(f);
end;
@#
procedure w_close(var f:word_file); {close a word file}
begin close_w(f);
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.31] faster version of input_ln
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
Since the inner loop of |input_ln| is part of \TeX's ``inner loop''---each
character of input comes in at this place---it is wise to reduce system
overhead by making use of special routines that read in an entire array
of characters at once, if such routines are available. The following
code uses standard \PASCAL\ to illustrate what needs to be done, but
finer tuning is often possible at well-developed \PASCAL\ sites.
@^inner loop@>
@p function input_ln(var f:alpha_file;@!bypass_eoln:boolean):boolean;
{inputs the next line or returns |false|}
var last_nonblank:0..buf_size; {|last| with trailing blanks removed}
begin if bypass_eoln then if not eof(f) then get(f);
{input the first character of the line into |f^|}
last:=first; {cf.\ Matthew 19\thinspace:\thinspace30}
if eof(f) then input_ln:=false
else begin last_nonblank:=first;
while not eoln(f) do
begin if last>=max_buf_stack then
begin max_buf_stack:=last+1;
if max_buf_stack=buf_size then
overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
end;
buffer[last]:=xord[f^]; get(f); incr(last);
if buffer[last-1]<>" " then last_nonblank:=last;
end;
last:=last_nonblank; input_ln:=true;
end;
end;
@y
Since the inner loop of |input_ln| is part of \TeX's ``inner loop''---each
character of input comes in at this place---it is wise to reduce system
overhead by making use of special routines that read in an entire array
of characters at once.
With 4.2bsd {\mc UNIX} we call an external C procedure, |line_read|.
That routine fills |buffer| from |first| onwards with the |xord|'ed values
of the next line, setting |last| appropriately. It will stop if
|last=buf_size|, and the following will cause an ``overflow'' abort.
We ignore the |bypass_eoln| argument, since the |line_read| procedure
will have handled bypassing the end-of-line in its previous call, if
there was one.
If one uses |input_ln| on a file, the normal |read|
and |get| routines shouldn't be used, nor the |eof| and |eoln| tests.
End of file can be tested with the external function |test_eof|.
@^inner loop@>
@p function input_ln(var f:alpha_file;@!bypass_eoln:boolean):boolean;
{inputs the next line or returns |false|}
label done;
begin
last:=first; {cf.\ Matthew 19\thinspace:\thinspace30}
if test_eof(f) then input_ln:=false
else begin last:=first;
line_read(f,buf_size);
if last>=max_buf_stack then begin
max_buf_stack:=last+1;
if max_buf_stack>=buf_size then
overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
end;
loop@+ begin if last=first then goto done;
if buffer[last-1]<>" " then goto done;
decr(last);
end;
done: input_ln:=true;
end;
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.32] term_in/out are input,output
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The user's terminal acts essentially like other files of text, except
that it is used both for input and for output. When the terminal is
considered an input file, the file variable is called |term_in|, and when it
is considered an output file the file variable is |term_out|.
@^system dependencies@>
@<Glob...@>=
@!term_in:alpha_file; {the terminal as an input file}
@!term_out:alpha_file; {the terminal as an output file}
@y
@ The user's terminal acts essentially like other files of text, except
that it is used both for input and for output. When the terminal is
considered an input file, the file is called |term_in|, and when it
is considered an output file the file is |term_out|.
For 4.2bsd {\mc UNIX} we use |standard_input| and |output| for these
files, as were declared in the program header. The former name
|standard_input| was defined using a web trick so that ``input'' is
produced in the Pascal file.
@d term_in==standard_input {the terminal as an input file}
@d term_out==output {the terminal as an output file}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.33] don't need to open terminal files
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ Here is how to open the terminal files
in \ph. The `\.{/I}' switch suppresses the first |get|.
@^system dependencies@>
@d t_open_in==reset(term_in,'TTY:','/O/I') {open the terminal for text input}
@d t_open_out==rewrite(term_out,'TTY:','/O') {open the terminal for text output}
@y
@ Here is how to open the terminal files
---do nothing.
@d t_open_in == {input already open for text input}
@d t_open_out == {output already open for text output}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.34] flushing output
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
these operations can be specified in \ph:
@^system dependencies@>
@d update_terminal == break(term_out) {empty the terminal output buffer}
@d clear_terminal == break_in(term_in,true) {clear the terminal input buffer}
@d wake_up_terminal == do_nothing {cancel the user's cancellation of output}
@y
these operations can be specified with 4.2bsd {\mc UNIX}.
@^system dependencies@>
@d update_terminal == flush(output)
@d clear_terminal == {nothing necessary on UNIX}
@d wake_up_terminal == {nothing necessary on UNIX}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.37] rescanning the command line
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The following program does the required initialization
without retrieving a possible command line.
It should be clear how to modify this routine to deal with command lines,
if the system permits them.
@^system dependencies@>
@p function init_terminal:boolean; {gets the terminal input started}
label exit;
begin t_open_in;
loop@+begin wake_up_terminal; write(term_out,'**'); update_terminal;
@.**@>
if not input_ln(term_in,true) then {this shouldn't happen}
begin write_ln(term_out);
write(term_out,'! End of file on the terminal... why?');
@.End of file on the terminal@>
init_terminal:=false; return;
end;
loc:=first;
while (loc<last)and(buffer[loc]=" ") do incr(loc);
if loc<last then
begin init_terminal:=true;
return; {return unless the line was all blank}
end;
write_ln(term_out,'Please type the name of your input file.');
end;
exit:end;
@y
@ The following program does the required initialization
and also retrieves a possible command line.
@^system dependencies@>
@p
function init_terminal:boolean; {gets the terminal input started}
label exit;
var
i, j : integer;
arg : packed array[1..100] of char;
begin
t_open_in;
if argc > 1 then begin
last := first;
for i := 1 to argc - 1 do begin
argv(i, arg);
j := 1;
while (j <= 100) and (arg[j] <> ' ') do begin
buffer[last] := xord[arg[j]];
incr(j); incr(last);
end;
if j > 1 then begin
buffer[last] := xord[' '];
incr(last);
end;
end;
if last > first then begin
loc := first;
init_terminal := true;
return;
end;
end;
loop@+begin
wake_up_terminal; write(term_out, '**'); update_terminal;
@.**@>
if not input_ln(term_in,true) then begin {this shouldn't happen}
write_ln(term_out);
write(term_out, '! End of file on the terminal... why?');
@.End of file on the terminal@>
init_terminal:=false;
return;
end;
loc:=first;
while (loc<last)and(buffer[loc]=" ") do
incr(loc);
if loc<last then begin
init_terminal:=true;
return; {return unless the line was all blank}
end;
write_ln(term_out, 'Please type the name of your input file.');
end;
exit:
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [4.39] make str_pool non-packed to you can pass it to calledit
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@!str_pool:packed array[pool_pointer] of ASCII_code; {the characters}
@y
@!str_pool:array[pool_pointer] of ASCII_code; {the characters}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [4.51] a_open_in of pool file needs path specifier
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(pool_file) then
@y
if a_open_in(pool_file,pool_file_path) then
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [4.51,52,53] make TEX.POOL lowercase in messages
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
else bad_pool('! I can''t read TEX.POOL.')
@y
else bad_pool('! I can''t read tex.pool.')
@z
@x
begin if eof(pool_file) then bad_pool('! TEX.POOL has no check sum.');
@y
begin if eof(pool_file) then bad_pool('! tex.pool has no check sum.');
@z
@x
bad_pool('! TEX.POOL line doesn''t begin with two digits.');
@y
bad_pool('! tex.pool line doesn''t begin with two digits.');
@z
@x
bad_pool('! TEX.POOL check sum doesn''t have nine digits.');
@y
bad_pool('! tex.pool check sum doesn''t have nine digits.');
@z
@x
done: if a<>@$ then bad_pool('! TEX.POOL doesn''t match; TANGLE me again.');
@y
done: if a<>@$ then bad_pool('! tex.pool doesn''t match; tangle me again.');
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [6.84] switch-to-editor option
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
line ready to be edited. But such an extension requires some system
wizardry, so the present implementation simply types out what file should be
edited and the relevant line number.
@^system dependencies@>
There is a secret `\.D' option available when the debugging routines have
not been commented out.
@^debugging@>
@y
line ready to be edited.
We do this by calling the external procedure |calledit| with a pointer to
the filename, its length, and the line number.
However, here we just set up the variables that will be used as arguments,
since we don't want to do the switch-to-editor until after TeX has closed
its files.
@^system dependencies@>
There is a secret `\.D' option available when the debugging routines have
not been commented out.
@^debugging@>
@d edit_file==input_stack[base_ptr]
@z
@x
"E": if base_ptr>0 then
begin print_nl("You want to edit file ");
@.You want to edit file x@>
print(input_stack[base_ptr].name_field);
print(" at line "); print_int(line);
interaction:=scroll_mode; jump_out;
@y
"E": if base_ptr>0 then
begin
edit_name_start:=str_start[edit_file.name_field];
edit_name_length:=str_start[edit_file.name_field+1] -
str_start[edit_file.name_field];
edit_line:=line;
jump_out;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [11.165] fix the word "free" so that it doesn't conflict with a runtime proc
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
been included. (You may want to decrease the size of |mem| while you
@^debugging@>
are debugging.)
@y
been included. (You may want to decrease the size of |mem| while you
@^debugging@>
are debugging.)
@d free==free_arr
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [12.186] glue_ratio fix
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
floating point underflow on the author's computer.
@^system dependencies@>
@^dirty \PASCAL@>
@<Display the value of |glue_set(p)|@>=
g:=float(glue_set(p));
if (g<>float_constant(0))and(glue_sign(p)<>normal) then
begin print(", glue set ");
if glue_sign(p)=shrinking then print("- ");
if abs(mem[p+glue_offset].int)<@'4000000 then print("?.?")
else if abs(g)>float_constant(20000) then
begin if g>float_constant(0) then print_char(">")
else print("< -");
print_glue(20000*unity,glue_order(p),0);
end
else print_glue(round(unity*g),glue_order(p),0);
@^real multiplication@>
end
@y
floating point underflow on the author's computer.
For the {\mc VAX}, the only possible random value that could hurt is
a reserved value with 1 in the sign bit and 0 for the (excess) exponent.
Because the sign-plus-exponent is in the middle of the word, the chances
of this happening are miniscule, and ignored here.
@^system dependencies@>
@^dirty \PASCAL@>
@<Display the value of |glue_set(p)|@>=
g:=float(glue_set(p));
if (g<>float_constant(0))and(glue_sign(p)<>normal) then
begin print(", glue set ");
if glue_sign(p)=shrinking then print("- ");
if abs(float(glue_set(p)))>20000.0 then
begin if float(glue_set(p))>0 then print_char(">")
else print("< -");
print_glue(20000*unity,glue_order(p),0);
end
else print_glue(round(float(glue_set(p))*unity),glue_order(p),0);
@^real multiplication@>
end
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [17.241] fix_date_and_time
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The following procedure, which is called just before \TeX\ initializes its
input and output, establishes the initial values of the date and time.
@^system dependencies@>
Since standard \PASCAL\ cannot provide such information, something special
is needed. The program here simply specifies July 4, 1776, at noon; but
users probably want a better approximation to the truth.
@p procedure fix_date_and_time;
begin time:=12*60; {minutes since midnight}
day:=4; {fourth day of the month}
month:=7; {seventh month of the year}
year:=1776; {Anno Domini}
end;
@y
@ The following procedure, which is called just before \TeX\ initializes its
input and output, establishes the initial values of the date and time.
It is calls an externally defined |date_and_time|, even though it could
be done from Pascal.
The external procedure also sets up interrupt catching.
@^system dependencies@>
@p procedure fix_date_and_time;
begin
date_and_time(time,day,month,year);
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.513] area and extension rules
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The file names we shall deal with for illustrative purposes have the
following structure: If the name contains `\.>' or `\.:', the file area
consists of all characters up to and including the final such character;
otherwise the file area is null. If the remaining file name contains
`\..', the file extension consists of all such characters from the first
remaining `\..' to the end, otherwise the file extension is null.
@^system dependencies@>
We can scan such file names easily by using two global variables that keep track
of the occurrences of area and extension delimiters:
@<Glob...@>=
@!area_delimiter:pool_pointer; {the most recent `\.>' or `\.:', if any}
@!ext_delimiter:pool_pointer; {the relevant `\..', if any}
@y
@ The file names we shall deal with for illustrative purposes have the
following structure: If the name contains `\./', the file area
consists of all characters up to and including the final such character;
otherwise the file area is null. If the remaining file name contains
`\..', the file extension consists of all such characters from the first
remaining `\..' to the end, otherwise the file extension is null.
@^system dependencies@>
We can scan such file names easily by using two global variables that keep
track of the occurrences of area and extension delimiters:
@<Glob...@>=
@!area_delimiter:pool_pointer; {the most recent `\./', if any}
@!ext_delimiter:pool_pointer; {the most recent `\..', if any}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.514] TEX area directories
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d TEX_area=="TeXinputs:"
@.TeXinputs@>
@d TEX_font_area=="TeXfonts:"
@.TeXfonts@>
@y
Under 4.2bsd {\mc UNIX}, the default paths are specified in a seprate
file, ``texpaths.h''. The file opening procedures do path searching
based either on those default paths, or on paths given by the user
in ``environment'' variables.
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.516] more_name
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
else begin if (c=">")or(c=":") then
@y
else begin if (c="/") then
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.520] default format
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d format_default_length=20 {length of the |TEX_format_default| string}
@d format_area_length=11 {length of its area part}
@d format_ext_length=4 {length of its `\.{.fmt}' part}
@y
Under 4.2bsd {\mc UNIX} we don't give the area part, instead depending
on the path searching that will happen during file opening.
@d format_default_length=9 {length of the |TEX_format_default| string}
@d format_area_length=0 {length of its area part}
@d format_ext_length=4 {length of its `\.{.fmt}' part}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.521] plain format location
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
TEX_format_default:='TeXformats:plain.fmt';
@y
TEX_format_default:='plain.fmt';
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.524] format file opening: only try once, with path search
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
pack_buffered_name(0,loc,j-1); {try first without the system file area}
if w_open_in(fmt_file) then goto found;
pack_buffered_name(format_area_length,loc,j-1);
{now try the system format file area}
if w_open_in(fmt_file) then goto found;
@y
pack_buffered_name(0,loc,j-1);
if w_open_in(fmt_file) then goto found;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.525] make_name_string
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
which simply makes a \TeX\ string from the value of |name_of_file|, should
ideally be changed to deduce the full name of file~|f|, which is the file
most recently opened, if it is possible to do this in a \PASCAL\ program.
@^system dependencies@>
This routine might be called after string memory has overflowed, hence
we dare not use `|str_room|'.
@p function make_name_string:str_number;
var k:1..file_name_size; {index into |name_of_file|}
begin if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings) then
make_name_string:="?"
else begin for k:=1 to name_length do append_char(xord[name_of_file[k]]);
make_name_string:=make_string;
end;
end;
@y
which simply makes a \TeX\ string from the value of |name_of_file|, should
ideally be changed to deduce the full name of file~|f|, which is the file
most recently opened, if it is possible to do this in a \PASCAL\ program.
With the 4.2bsd {\mc UNIX} version, we know that |real_name_of_file|
contains |name_of_file| prepended with the directory name that was found
by path searching.
If |real_name_of_file| starts with |'./'|, we don't use that part of the
name, since {\mc UNIX} users understand that.
@^system dependencies@>
This routine might be called after string memory has overflowed, hence
we dare not use `|str_room|'.
@p function make_name_string:str_number;
var k,@!kstart:1..file_name_size; {index into |name_of_file|}
begin
k:=1;
while (k<file_name_size) and (xord[real_name_of_file[k]]<>" ") do
incr(k);
name_length:=k-1; {the real |name_length|}
if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings) then
make_name_string:="?"
else begin
if (xord[real_name_of_file[1]]=".") and (xord[real_name_of_file[2]]="/") then
kstart:=3
else
kstart:=1;
for k:=kstart to name_length do append_char(xord[real_name_of_file[k]]);
make_name_string:=make_string;
end
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.537] a_open_in of \input file needs path selector
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(cur_file) then goto done;
if cur_area="" then
begin pack_file_name(cur_name,TEX_area,cur_ext);
if a_open_in(cur_file) then goto done;
end;
@y
if a_open_in(cur_file,input_file_path) then goto done;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.537] get rid of return of name to string pool
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if name=str_ptr-1 then {we can conserve string pool space now}
begin flush_string; name:=cur_name;
end;
@y
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [30.563] opening tfm file: now path searching is done
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Set temp_int to value of first byte
@x
@ @<Open |tfm_file| for input@>=
file_opened:=false;
if aire="" then pack_file_name(nom,TEX_font_area,".tfm")
else pack_file_name(nom,aire,".tfm");
if not b_open_in(tfm_file) then abort;
file_opened:=true
@y
@ @<Open |tfm_file| for input@>=
file_opened:=false;
pack_file_name(nom,aire,".tfm");
if not b_open_in(tfm_file) then abort;
begin temp_int:=ord(tfm_file^);
end;
file_opened:=true
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [30.564] reading the tfm file
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d fget==get(tfm_file)
@d fbyte==tfm_file^
@y
For Pyramid {\mc UNIX} we had to make the |byte_file| type have data of
type char, so we hope that 'ord' will work.
The integer |temp_int| will be added to global variables at the end,
where it won't disturb module numbering.
@d fget==begin get(tfm_file);
temp_int:=ord(tfm_file^);
end
@d fbyte==temp_int
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [32.597] write_dvi
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@p procedure write_dvi(@!a,@!b:dvi_index);
var k:dvi_index;
begin for k:=a to b do write(dvi_file,dvi_buf[k]);
end;
@y
For 4.2bsd {\mc UNIX}, this is going to be handled by an external procedure,
|writedvi|, which will do the output using |fwrite|.
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [49.1275] a_open_in of \read file needs path specifier
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(read_file[n]) then read_open[n]:=just_open;
@y
if a_open_in(read_file[n],read_file_path) then read_open[n]:=just_open;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [51.1332] Add call to exit() depending upon value of `history'
% Also, add call to set_paths
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ Now this is really it: \TeX\ starts and ends here.
The initial test involving |ready_already| should be deleted if the
\PASCAL\ runtime system is smart enough to detect such a ``mistake.''
@y
@ Now this is really it: \TeX\ starts and ends here.
Use the value of |history| to determine what exit-code to use. We use
1 if |history <> spotless| and 0 otherwise.
@d UNIXexit==e@&x@&i@&t
@z
@x
t_open_out; {open the terminal for output}
@y
t_open_out; {open the terminal for output}
set_paths;
@z
@x
final_end: ready_already:=0;
@y
final_end: ready_already:=0;
if (history <> spotless) and (history <> warning_issued) then
UNIXexit(1)
else
UNIXexit(0);
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [51.1333] print new line before termination; switch to editor if nec.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
print(log_name); print_char(".");
end;
end;
@y
print(log_name); print_char(".");
end;
end;
print_ln;
if (edit_name_start<>0) and (interaction>batch_mode) then
calledit(str_pool[edit_name_start],edit_name_length,edit_line);
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [54.1376] add temp_int and editor-switch variables to globals
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
\f
@* \[54] System-dependent changes.
This section should be replaced, if necessary, by changes to the program
that are necessary to make \TeX\ work at a particular installation.
It is usually best to design your change file so that all changes to
previous sections preserve the section numbering; then everybody's version
will be consistent with the published program. More extensive changes,
which introduce new sections, can be inserted here; then only the index
itself will get a new section number.
@^system dependencies@>
@y
\f
@* \[54] System-dependent changes.
Here is a temporary integer, used as a holder during reading and writing of
TFM files.
Also, the variables used to hold ``switch-to-editor'' information.
@^system dependencies@>
@<Globals...@>=
@!temp_int:integer;
@!edit_name_start: pool_pointer;
@!edit_name_length,@!edit_line: integer;
@ The |edit_name_start| will be set to point into |str_pool| somewhere after
its beginning if \TeX\ is supposed to switch to an editor on exit.
@<Set init...@>=
edit_name_start:=0;
@z
SHAR_EOF
cat << \SHAR_EOF > dist_initex.SYS_V.ch
% Change file for Berkeley UNIX, for a hacked version of the pc pascal
% compiler (with the others: clause in case statements).
%
% Distant relation of David Fuchs' Sep 13, 1982 TOPS20 version, greatly
% modified by Howard Trickey and Pavel Curtis
% Modification History:
%
% (10/9) HWT Brought up to version 0.1
% (10/13) HWT Fixed bug in hpack
% (10/17) HWT Changed to version 0.3
% (10/22) HWT Brought up to version 0.4
% (10/26) HWT Changed to use version 0.5 source
% (11/19) HWT Changed to use version 0.8 source; fixed glue_ratios to use
% external C procedures
% (11/30) HWT Changed to use new tangle, with verbatim Pascal mode, to avoid
% need for editing in the #include statement
% (changed modules 4,9)
% (1/15/83) HWT Changed to use version 0.94 source; added Pavel's changes to
% allow undumping; added Grim's fix for grtofl, etc.;
% modified for Knuth's new tangle.
% (2/1/83) PC Consolidated with Pavel's version, changed the fl<->gr
% routines to avoid slow and messy union type.
% (3/18/83) HWT Changed to use version 0.96 source (means changing fltogr and
% grtofl to unfloat and float, then getting rid of a lot of
% changes); made TeX print a newline
% at the end of the run.
% (4/2/83) PC Added call to exit() at end of run, with exit-value dependent
% upon the value of `history'.
% (4/16/83) PC Brought up to version 0.97 of TeX.
% (5/23/83) HWT Changed mem_max to 30000 for initex (because of latex)
% (6/2/83) HWT Brought up to version 0.98 of TeX. Changed some of the
% string-related constants to match the latest tops20
% change file. Modified input_ln and write_dvi to use external
% C procedures, for speed increase. Changed file opening
% procedures to use external C procedure to test for
% accessibility, so that now none of the pc runtime library
% programs need to be modified (though close1 is still needed)
% (6/28/83) HWT Brought up to 0.99, with new change file format.
% (7/17/83) HWT Brought up to 0.999. Added switch-to-editor stuff.
% (7/29/83) HWT Brought up to 0.9999.
% (11/4/83) HWT Brought up to 0.999999.
% (11/16/83) HWT Brought up to 1.0. Upped max_strings, string_vacancies,
% pool_size, hash_size, and hash_prime, to agree with
% TOPS20-changes constants.
% (1/4/84) HWT Again, upped pool_size to 40000 for LaTeX.
% (2/18/84) HWT Made changes to use search path stuff in new ext.c. Now all
% the path specific stuff is localized to texpaths.h
% (6/6/84) HWT Brought up to 1.1. Upped pool_size and hash_size for LaTeX.
% (31/7/84) HWT Removed the forgetting of the full file name, so that
% switch-to-editor works for non-primary file.
% (11/16/84) RKF Brought up to 1.2
% (12/26/84) RKF Brought up to 1.3, consulting changes already done by
% SVB@Purdue, rusty@sdcarl, and a related file from HWT
% (3/11/85) RKF Brought up to 1.3b
% (9/2/85) RKF Brought up to 1.5 (yep, missed 1.4)
% (1/30/86) PAM brought up to 2.0
% (3/7/87) LKS Changes for System V UniX
% (4/19/87) PAM brought up to 2.1
% (9/23/87) PAM Changed version number for TeX 2.3
% (10/25/87) PAM Changed version number for TeX 2.5
% (12/5/87) PAM Changed version number for TeX 2.7
% (1/15/88) PAM Changed version number for TeX 2.9
% Use this file as is to make an INITEX. To get production TEX, use the
% shell script ``ini_to_vir'' and re-TANGLE.
% NOTE: the module numbers in this change file refer to the Version 0.999
% listing (red cover) made in July 1983.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [0] WEAVE: only print changes
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
@y
\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
\let\maybe=\iffalse
\def\title{\TeX82 changes for System V {\mc UNIX}}
\def\glob{13}\def\gglob{20, 26} % these are defined in module 1
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.2] banner line
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d banner=='This is TeX, Version 2.9' {printed when \TeX\ starts}
@y
@d banner=='This is TeX, Version 2.9 for System V UNIX'
{printed when \TeX\ starts}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.4] program header
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
Actually the heading shown here is not quite normal: The |program| line
does not mention any |output| file, because \ph\ would ask the \TeX\ user
to specify a file name if |output| were specified here.
@^system dependencies@>
@d mtype==t@&y@&p@&e {this is a \.{WEB} coding trick:}
@y
@d mtype==t@&y@&p@&e {this is a \.{WEB} coding trick:}
@d standard_input==i@&n@&p@&u@&t {and another}
@z
@x
program TEX; {all file names are defined dynamically}
@y
program TEX(standard_input,output); {other file names are defined dynamically}
@z
@x
var @<Global variables@>@/
@y
var @<Globals variables@>@/
@#
@\@=#include "ext.h"@>@\ {declarations for external C procedures}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.7] debug..gubed, stat..tats
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d debug==@{ {change this to `$\\{debug}\equiv\null$' when debugging}
@d gubed==@t@>@} {change this to `$\\{gubed}\equiv\null$' when debugging}
@y
@d debug==
@d gubed==
@z
@x
@d stat==@{ {change this to `$\\{stat}\equiv\null$' when gathering
usage statistics}
@d tats==@t@>@} {change this to `$\\{tats}\equiv\null$' when gathering
usage statistics}
@y
@d stat==
@d tats==
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.8] init..tini
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d init== {change this to `$\\{init}\equiv\.{@@\{}$' in the production version}
@d tini== {change this to `$\\{tini}\equiv\.{@@\}}$' in the production version}
@y
@d init==
@d tini==
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.11] compile-time constants, use logical names
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@!mem_max=30000; {greatest index in \TeX's internal |mem| array;
must be strictly less than |max_halfword|;
must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
@!mem_min=0; {smallest index in \TeX's internal |mem| array;
must be |min_halfword| or more;
must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
@!buf_size=500; {maximum number of characters simultaneously present in
current lines of open files and in control sequences between
\.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
@!error_line=72; {width of context lines on terminal error messages}
@!half_error_line=42; {width of first lines of contexts in terminal
error messages; should be between 30 and |error_line-15|}
@!max_print_line=79; {width of longest text lines output; should be at least 60}
@!stack_size=200; {maximum number of simultaneous input sources}
@!max_in_open=6; {maximum number of input files and error insertions that
can be going on simultaneously}
@!font_max=75; {maximum internal font number; must not exceed |max_quarterword|
and must be at most |font_base+256|}
@!font_mem_size=20000; {number of words of |font_info| for all fonts}
@!param_size=60; {maximum number of simultaneous macro parameters}
@!nest_size=40; {maximum number of semantic levels simultaneously active}
@!max_strings=3000; {maximum number of strings; must not exceed |max_halfword|}
@!string_vacancies=8000; {the minimum number of characters that should be
available for the user's control sequences and font names,
after \TeX's own error messages are stored}
@!pool_size=32000; {maximum number of characters in strings, including all
error messages and help texts, and the names of all fonts and
control sequences; must exceed |string_vacancies| by the total
length of \TeX's own strings, which is currently about 23000}
@!save_size=600; {space for saving values outside of current group; must be
at most |max_halfword|}
@!trie_size=8000; {space for hyphenation patterns; should be larger for
\.{INITEX} than it is in production versions of \TeX}
@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
@!file_name_size=40; {file names shouldn't be longer than this}
@!pool_name='TeXformats:TEX.POOL ';
{string of length |file_name_size|; tells where the string pool appears}
@y
@!mem_max=60000; {greatest index in \TeX's internal |mem| array;
must be strictly less than |max_halfword|;
must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
@!mem_min=0; {smallest index in \TeX's internal |mem| array;
must be |min_halfword| or more;
must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
@!buf_size=500; {maximum number of characters simultaneously present in
current lines of open files and in control sequences between
\.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
@!error_line=79; {width of context lines on terminal error messages}
@!half_error_line=50; {width of first lines of contexts in terminal
error messages; should be between 30 and |error_line-15|}
@!max_print_line=79; {width of longest text lines output; should be at least 60}
@!stack_size=200; {maximum number of simultaneous input sources}
@!max_in_open=15; {maximum number of input files and error insertions that
can be going on simultaneously}
@!font_max=100; {maximum internal font number; must not exceed |max_quarterword|
and must be at most |font_base+256|}
@!font_mem_size=25000; {number of words of |font_info| for all fonts}
@!param_size=60; {maximum number of simultaneous macro parameters}
@!nest_size=40; {maximum number of semantic levels simultaneously active}
@!max_strings=4400; {maximum number of strings; must not exceed |max_halfword|}
@!string_vacancies=15000; {the minimum number of characters that should be
available for the user's control sequences and font names,
after \TeX's own error messages are stored}
@!pool_size=45000; {maximum number of characters in strings, including all
error messages and help texts, and the names of all fonts and
control sequences; must exceed |string_vacancies| by the total
length of \TeX's own strings, which is currently about 23000}
@!save_size=600; {space for saving values outside of current group; must be
at most |max_halfword|}
@!trie_size=8000; {space for hyphenation patterns; should be larger for
\.{INITEX} than it is in production versions of \TeX}
@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
@!file_name_size=1024; {file names shouldn't be longer than this}
@!pool_name='tex.pool';
{string of length |file_name_size|; the string pool name}
@.TeXformats@>
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [1.12] sensitive compile-time constants
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d mem_bot=0 {smallest index in the |mem| array dumped by \.{INITEX};
must not be less than |mem_min|}
@d mem_top==30000 {largest index in the |mem| array dumped by \.{INITEX};
must be substantially larger than |mem_bot|
and not greater than |mem_max|}
@d font_base=0 {smallest internal font number; must not be less
than |min_quarterword|}
@d hash_size=2100 {maximum number of control sequences; it should be at most
about |(mem_max-mem_min)/10|, but 2100 is already quite generous}
@d hash_prime=1777 {a prime number equal to about 85\% of |hash_size|}
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@y
@d mem_bot=0 {smallest index in the |mem| array dumped by \.{INITEX};
must not be less than |mem_min|}
@d mem_top==60000 {largest index in the |mem| array dumped by \.{INITEX};
must be substantially larger than |mem_bot|
and not greater than |mem_max|}
@d font_base=0 {smallest internal font number; must not be less
than |min_quarterword|}
@d hash_size=3000 {maximum number of control sequences; it should be at most
about |(mem_max-mem_min)/10|, but 2100 is already quite generous}
@d hash_prime=2551 {a prime number equal to about 85\%\ of |hash_size|}
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [2.23] form-feed and tab are legal characters
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@^character set dependencies@>
@^system dependencies@>
@<Set init...@>=
for i:=1 to @'37 do xchr[i]:=' ';
@y
@^character set dependencies@>
@^system dependencies@>
The code shown here is intended to be used on systems
where only the printable ascii set, along with
|carriage_return|, |tab|, and |form_feed| will show up in text files.
All |null| characters are skipped.
@d form_feed=@'14 {ascii code used at end of a page}
@d tab=@'11
@<Set initial values...@>=
for i:=1 to @'37 do xchr[i]:=' ';
xchr[form_feed]:=chr(form_feed);
xchr[tab]:=chr(tab);
xchr[null_code]:=chr(null_code);
@z
@x
for i:=first_text_char to last_text_char do xord[chr(i)]:=invalid_code;
@y
for i:=first_text_char to last_text_char do xord[chr(i)]:=invalid_code;
xord[xchr[null_code]]:=null_code;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.25] file types
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
The program actually makes use also of a third kind of file, called a
@y
The pc compiler on System V {\mc UNIX} won't pack ranges into one byte
unless the lower bound is |0| or more, and the upper bound is |127|
or less. This applies to files, too. Therefore, we pretend that
files of |eight_bits| are really of type |char|, and supply
external C routines to read and write |eight_bits| codes.
Note that |eight_bits| really takes 16 bits here.
The program actually makes use also of a third kind of file, called a
@z
@x
@!alpha_file=packed file of text_char; {files that contain textual data}
@!byte_file=packed file of eight_bits; {files that contain binary data}
@y
@!alpha_file=t@&e@&x@&t; {files that contain textual data}
@!byte_file=packed file of char; {files that contain binary data}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.23] add real_name_of_file array
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
is crucial for our purposes. We shall assume that |name_of_file| is a variable
of an appropriate type such that the \PASCAL\ run-time system being used to
implement \TeX\ can open a file whose external name is specified by
|name_of_file|.
@^system dependencies@>
@<Glob...@>=
@!name_of_file:packed array[1..file_name_size] of char;@;@/
{on some systems this may be a \&{record} variable}
@!name_length:0..file_name_size;@/{this many characters are actually
relevant in |name_of_file| (the rest are blank)}
@y
is crucial for our purposes. We shall assume that |name_of_file| is a variable
of an appropriate type such that the \PASCAL\ run-time system being used to
implement \TeX\ can open a file whose external name is specified by
|name_of_file|.
The System V {\mc UNIX} version uses search paths to look for files to open.
We use |real_name_of_file| to hold the |name_of_file| with a directory
name from the path in front of it.
@^system dependencies@>
@<Glob...@>=
@!name_of_file,@!real_name_of_file:packed array[1..file_name_size] of char;
@;@/
@!name_length:0..file_name_size;@/{this many characters are actually
relevant in |name_of_file| (the rest are blank)}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.27] file opening
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The \ph\ compiler with which the present version of \TeX\ was prepared has
extended the rules of \PASCAL\ in a very convenient way. To open file~|f|,
we can write
$$\vbox{\halign{#\hfil\qquad&#\hfil\cr
|reset(f,@t\\{name}@>,'/O')|&for input;\cr
|rewrite(f,@t\\{name}@>,'/O')|&for output.\cr}}$$
The `\\{name}' parameter, which is of type `{\bf packed array
$[\langle\\{any}\rangle]$ of \\{char}}', stands for the name of
the external file that is being opened for input or output.
Blank spaces that might appear in \\{name} are ignored.
The `\.{/O}' parameter tells the operating system not to issue its own
error messages if something goes wrong. If a file of the specified name
cannot be found, or if such a file cannot be opened for some other reason
(e.g., someone may already be trying to write the same file), we will have
|@!erstat(f)<>0| after an unsuccessful |reset| or |rewrite|. This allows
\TeX\ to undertake appropriate corrective action.
@:PASCAL H}{\ph@>
@^system dependencies@>
\TeX's file-opening procedures return |false| if no file identified by
|name_of_file| could be opened.
@d reset_OK(#)==erstat(#)=0
@d rewrite_OK(#)==erstat(#)=0
@p function a_open_in(var f:alpha_file):boolean;
{open a text file for input}
begin reset(f,name_of_file,'/O'); a_open_in:=reset_OK(f);
end;
@#
function a_open_out(var f:alpha_file):boolean;
{open a text file for output}
begin rewrite(f,name_of_file,'/O'); a_open_out:=rewrite_OK(f);
end;
@#
function b_open_in(var f:byte_file):boolean;
{open a binary file for input}
begin reset(f,name_of_file,'/O'); b_open_in:=reset_OK(f);
end;
@#
function b_open_out(var f:byte_file):boolean;
{open a binary file for output}
begin rewrite(f,name_of_file,'/O'); b_open_out:=rewrite_OK(f);
end;
@#
function w_open_in(var f:word_file):boolean;
{open a word file for input}
begin reset(f,name_of_file,'/O'); w_open_in:=reset_OK(f);
end;
@#
function w_open_out(var f:word_file):boolean;
{open a word file for output}
begin rewrite(f,name_of_file,'/O'); w_open_out:=rewrite_OK(f);
end;
@y
@ The \ph\ compiler with which the present version of \TeX\ was prepared has
extended the rules of \PASCAL\ in a very convenient way for file opening.
System V {\mc UNIX} \PASCAL\ isn't nearly as nice as \ph.
Normally, it bombs out if a file open fails.
An external C procedure, |test_access| is used to check whether or not the
open will work. It is declared in the ``ext.h'' include file, and it returns
|true| or |false|. The |name_of_file| global holds the file name whose access
is to be tested.
The first parameter for |test_access| is the access mode,
one of |read_access_mode| or |write_access_mode|.
We also implement path searching in |test_access|: its second parameter is
one of the ``file path'' constants defined below. If |name_of_file|
doesn't start with |'/'| then |test_access| tries prepending pathnames
from the appropriate path list until success or the end of path list
is reached.
On return, |real_name_of_file| contains the original name with the path
that succeeded (if any) prepended. It is the name used in the various
open procedures.
Note that |a_open_in| has been redefined to take an additional argument,
which should be one of the ``file path'' specifiers.
Since |b_open_in| is only used for \.{TFM} files, and
|w_open_in| is only used for format files, we don't need a path specifying
argument for them.
Path searching is not done for output files.
@d read_access_mode=4 {``read'' mode for |test_access|}
@d write_access_mode=2 {``write'' mode for |test_access|}
@d no_file_path=0 {no path searching should be done}
@d input_file_path=1 {path specifier for \.{\\input} files}
@d read_file_path=2 {path specifier for \.{\\read} files}
@d font_file_path=3 {path specifier for \.{TFM} files}
@d format_file_path=4 {path specifier for format files}
@d pool_file_path=5 {path specifier for the pool file}
@p function a_open_in(var f:alpha_file;@!path_specifier:integer):boolean;
{open a text file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,path_specifier) then
begin reset(f,real_name_of_file); ok:=true@+end
else
ok:=false;
a_open_in:=ok;
end;
@#
function a_open_out(var f:alpha_file):boolean;
{open a text file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,real_name_of_file); ok:=true @+end
else ok:=false;
a_open_out:=ok;
end;
@#
function b_open_in(var f:byte_file):boolean;
{open a binary file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,font_file_path) then
begin reset(f,real_name_of_file); ok:=true @+end
else ok:=false;
b_open_in:=ok;
end;
@#
function b_open_out(var f:byte_file):boolean;
{open a binary file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,real_name_of_file); ok:=true @+end
else ok:=false;
b_open_out:=ok;
end;
@#
function w_open_in(var f:word_file):boolean;
{open a word file for input}
var @!ok:boolean;
begin
if test_access(read_access_mode,format_file_path) then
begin reset(f,real_name_of_file); ok:=true @+end
else ok:=false;
w_open_in:=ok;
end;
@#
function w_open_out(var f:word_file):boolean;
{open a word file for output}
var @!ok:boolean;
begin
if test_access(write_access_mode,no_file_path) then
begin rewrite(f,name_of_file); ok:=true @+end
else ok:=false;
w_open_out:=ok;
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.28] file closing
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
This makes |f| available to be opened again, if desired; and if |f| was used for
output, the |close| operation makes the corresponding external file appear
on the user's area, ready to be read.
These procedures should not generate error messages if a file is
being closed before it has been successfully opened.
@p procedure a_close(var f:alpha_file); {close a text file}
begin close(f);
end;
@#
procedure b_close(var f:byte_file); {close a binary file}
begin close(f);
end;
@#
procedure w_close(var f:word_file); {close a word file}
begin close(f);
end;
@y
This makes |f| available to be opened again, if desired; and if |f| was used for
output, the |close| operation makes the corresponding external file appear
on the user's area, ready to be read.
In the System V \PASCAL\ compiler, the |close| command performs
this operation. Unfortunately, it can not be called
directly, since it assumes that the file has already been
successfully opened (which may not be the case). Therefore, we
supply external routines |close_a|, |close_b|, and |close_w|
that first check whether the file has been opened before attempting
a close. There should be an ``include'' statement above,
to declare these external procedures.
@p procedure a_close(var f:alpha_file); {close a text file}
begin close_a(f);
end;
@#
procedure b_close(var f:byte_file); {close a binary file}
begin close_b(f);
end;
@#
procedure w_close(var f:word_file); {close a word file}
begin close_w(f);
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.31] faster version of input_ln
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
Since the inner loop of |input_ln| is part of \TeX's ``inner loop''---each
character of input comes in at this place---it is wise to reduce system
overhead by making use of special routines that read in an entire array
of characters at once, if such routines are available. The following
code uses standard \PASCAL\ to illustrate what needs to be done, but
finer tuning is often possible at well-developed \PASCAL\ sites.
@^inner loop@>
@p function input_ln(var f:alpha_file;@!bypass_eoln:boolean):boolean;
{inputs the next line or returns |false|}
var last_nonblank:0..buf_size; {|last| with trailing blanks removed}
begin if bypass_eoln then if not eof(f) then get(f);
{input the first character of the line into |f^|}
last:=first; {cf.\ Matthew 19\thinspace:\thinspace30}
if eof(f) then input_ln:=false
else begin last_nonblank:=first;
while not eoln(f) do
begin if last>=max_buf_stack then
begin max_buf_stack:=last+1;
if max_buf_stack=buf_size then
overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
end;
buffer[last]:=xord[f^]; get(f); incr(last);
if buffer[last-1]<>" " then last_nonblank:=last;
end;
last:=last_nonblank; input_ln:=true;
end;
end;
@y
Since the inner loop of |input_ln| is part of \TeX's ``inner loop''---each
character of input comes in at this place---it is wise to reduce system
overhead by making use of special routines that read in an entire array
of characters at once.
With System V {\mc UNIX} we call an external C procedure, |line_read|.
That routine fills |buffer| from |first| onwards with the |xord|'ed values
of the next line, setting |last| appropriately. It will stop if
|last=buf_size|, and the following will cause an ``overflow'' abort.
We ignore the |bypass_eoln| argument, since the |line_read| procedure
will have handled bypassing the end-of-line in its previous call, if
there was one.
If one uses |input_ln| on a file, the normal |read|
and |get| routines shouldn't be used, nor the |eof| and |eoln| tests.
End of file can be tested with the external function |test_eof|.
@^inner loop@>
@p function input_ln(var f:alpha_file;@!bypass_eoln:boolean):boolean;
{inputs the next line or returns |false|}
label done;
begin
last:=first; {cf.\ Matthew 19\thinspace:\thinspace30}
if test_eof(f) then input_ln:=false
else begin last:=first;
line_read(f,buf_size);
if last>=max_buf_stack then begin
max_buf_stack:=last+1;
if max_buf_stack>=buf_size then
overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
end;
loop@+ begin if last=first then goto done;
if buffer[last-1]<>" " then goto done;
decr(last);
end;
done: input_ln:=true;
end;
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.32] term_in/out are input,output
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The user's terminal acts essentially like other files of text, except
that it is used both for input and for output. When the terminal is
considered an input file, the file variable is called |term_in|, and when it
is considered an output file the file variable is |term_out|.
@^system dependencies@>
@<Glob...@>=
@!term_in:alpha_file; {the terminal as an input file}
@!term_out:alpha_file; {the terminal as an output file}
@y
@ The user's terminal acts essentially like other files of text, except
that it is used both for input and for output. When the terminal is
considered an input file, the file is called |term_in|, and when it
is considered an output file the file is |term_out|.
For System V {\mc UNIX} we use |standard_input| and |output| for these
files, as were declared in the program header. The former name
|standard_input| was defined using a web trick so that ``input'' is
produced in the Pascal file.
@d term_in==standard_input {the terminal as an input file}
@d term_out==output {the terminal as an output file}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.33] don't need to open terminal files
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ Here is how to open the terminal files
in \ph. The `\.{/I}' switch suppresses the first |get|.
@^system dependencies@>
@d t_open_in==reset(term_in,'TTY:','/O/I') {open the terminal for text input}
@d t_open_out==rewrite(term_out,'TTY:','/O') {open the terminal for text output}
@y
@ Here is how to open the terminal files
---do nothing.
@d t_open_in == {input already open for text input}
@d t_open_out == {output already open for text output}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.34] flushing output
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
these operations can be specified in \ph:
@^system dependencies@>
@d update_terminal == break(term_out) {empty the terminal output buffer}
@d clear_terminal == break_in(term_in,true) {clear the terminal input buffer}
@d wake_up_terminal == do_nothing {cancel the user's cancellation of output}
@y
these operations can be specified with System V {\mc UNIX} by calling
an external C procedure.
@^system dependencies@>
@d update_terminal == flush(output)
@d clear_terminal == {nothing necessary on UNIX}
@d wake_up_terminal == {nothing necessary on UNIX}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [3.37] rescanning the command line
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The following program does the required initialization
without retrieving a possible command line.
It should be clear how to modify this routine to deal with command lines,
if the system permits them.
@^system dependencies@>
@p function init_terminal:boolean; {gets the terminal input started}
label exit;
begin t_open_in;
loop@+begin wake_up_terminal; write(term_out,'**'); update_terminal;
@.**@>
if not input_ln(term_in,true) then {this shouldn't happen}
begin write_ln(term_out);
write(term_out,'! End of file on the terminal... why?');
@.End of file on the terminal@>
init_terminal:=false; return;
end;
loc:=first;
while (loc<last)and(buffer[loc]=" ") do incr(loc);
if loc<last then
begin init_terminal:=true;
return; {return unless the line was all blank}
end;
write_ln(term_out,'Please type the name of your input file.');
end;
exit:end;
@y
@ The following program does the required initialization
and also retrieves a possible command line.
@^system dependencies@>
@p
function init_terminal:boolean; {gets the terminal input started}
label exit;
var
i, j : integer;
arg : packed array[1..100] of char;
begin
t_open_in;
if argc > 1 then begin
last := first;
for i := 2 to argc do begin
argv(i, arg);
j := 1;
while (j <= 100) and (arg[j] <> ' ') do begin
buffer[last] := xord[arg[j]];
incr(j); incr(last);
end;
if j > 1 then begin
buffer[last] := xord[' '];
incr(last);
end;
end;
if last > first then begin
loc := first;
init_terminal := true;
return;
end;
end;
loop@+begin
wake_up_terminal; write(term_out, '**'); update_terminal;
@.**@>
if not input_ln(term_in,true) then begin {this shouldn't happen}
write_ln(term_out);
write(term_out, '! End of file on the terminal... why?');
@.End of file on the terminal@>
init_terminal:=false;
return;
end;
loc:=first;
while (loc<last)and(buffer[loc]=" ") do
incr(loc);
if loc<last then begin
init_terminal:=true;
return; {return unless the line was all blank}
end;
write_ln(term_out, 'Please type the name of your input file.');
end;
exit:
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [4.51] a_open_in of pool file needs path specifier
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(pool_file) then
@y
if a_open_in(pool_file,pool_file_path) then
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [4.51,52,53] make TEX.POOL lowercase in messages
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
else bad_pool('! I can''t read TEX.POOL.')
@y
else bad_pool('! I can''t read tex.pool.')
@z
@x
begin if eof(pool_file) then bad_pool('! TEX.POOL has no check sum.');
@y
begin if eof(pool_file) then bad_pool('! tex.pool has no check sum.');
@z
@x
bad_pool('! TEX.POOL line doesn''t begin with two digits.');
@y
bad_pool('! tex.pool line doesn''t begin with two digits.');
@z
@x
bad_pool('! TEX.POOL check sum doesn''t have nine digits.');
@y
bad_pool('! tex.pool check sum doesn''t have nine digits.');
@z
@x
done: if a<>@$ then bad_pool('! TEX.POOL doesn''t match; TANGLE me again.');
@y
done: if a<>@$ then bad_pool('! tex.pool doesn''t match; tangle me again.');
@z
@x
procedure that quietly terminates the program.
@<Error hand...@>=
procedure jump_out;
begin goto end_of_TEX;
end;
@y
procedure that quietly terminates the program.
By not using a non-local goto in this procedure, we can later split
the tangled output into smaller modules that are accepted by the System
V \PASCAL\ compiler and optimizer. The value of
|history| determines what exit-code to use. We use
1 if |history <> spotless| and 0 otherwise.
@d UNIXexit==e@&x@&i@&t
@<Error hand...@>=
procedure jump_out;
begin
close_files_and_terminate;
ready_already:=0;
if (history <> spotless) and (history <> warning_issued) then
UNIXexit(1)
else
UNIXexit(0);
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [6.84] switch-to-editor option
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
line ready to be edited. But such an extension requires some system
wizardry, so the present implementation simply types out what file should be
edited and the relevant line number.
@^system dependencies@>
There is a secret `\.D' option available when the debugging routines have
not been commented out.
@^debugging@>
@y
line ready to be edited.
We do this by calling the external procedure |calledit| with a pointer to
the filename, its length, and the line number.
However, here we just set up the variables that will be used as arguments,
since we don't want to do the switch-to-editor until after TeX has closed
its files.
@^system dependencies@>
There is a secret `\.D' option available when the debugging routines have
not been commented out.
@^debugging@>
@d edit_file==input_stack[base_ptr]
@z
@x
"E": if base_ptr>0 then
begin print_nl("You want to edit file ");
@.You want to edit file x@>
print(input_stack[base_ptr].name_field);
print(" at line "); print_int(line);
interaction:=scroll_mode; jump_out;
@y
"E": if base_ptr>0 then
begin
edit_name_start:=str_start[edit_file.name_field];
edit_name_length:=str_start[edit_file.name_field+1] -
str_start[edit_file.name_field];
edit_line:=line;
jump_out;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [7.109] glue_ratio
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
routines cited there must be modified to allow negative glue ratios.)
@^system dependencies@>
@d set_glue_ratio_zero(#) == #:=0.0 {store the representation of zero ratio}
@d set_glue_ratio_one(#) == #:=1.0 {store the representation of unit ratio}
@d float(#) == # {convert from |glue_ratio| to type |real|}
@d unfloat(#) == # {convert from |real| to type |glue_ratio|}
@d float_constant(#) == #.0 {convert |integer| constant to |real|}
@<Types...@>=
@!glue_ratio=real; {one-word representation of a glue expansion factor}
@y
routines cited there must be modified to allow negative glue ratios.)
The System V {\mc UNIX} pc compiler won't let us use reals of less than eight
bytes. We will pretend that a |glue_ratio| is an |integer|, but we will
really store |short_real|'s in them. This will be accomplished by using
external C procedures to store into and retrieve from |glue_ratio|'s.
The source uses macros |unfloat| and |float| for these purposes. We need
to change the word ``float'' before it is written out, because that is a
reserved word in C.
@^system dependencies@>
@d float(#)==tofloat(#)
@d set_glue_ratio_zero(#)==#:=unfloat(0.0)
@d set_glue_ratio_one(#)==#:=unfloat(1.0)
@d float_constant(#) == #.0 {convert |integer| constant to |real|}
@<Types...@>=
@!glue_ratio = integer; {one-word representation of a glue expansion factor}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [11.165] fix the word "free" so that it doesn't conflict with a runtime proc
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
been included. (You may want to decrease the size of |mem| while you
@^debugging@>
are debugging.)
@y
been included. (You may want to decrease the size of |mem| while you
@^debugging@>
are debugging.)
@d free==free_arr
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [12.186] glue_ratio fix
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
floating point underflow on the author's computer.
@^system dependencies@>
@^dirty \PASCAL@>
@<Display the value of |glue_set(p)|@>=
g:=float(glue_set(p));
if (g<>float_constant(0))and(glue_sign(p)<>normal) then
begin print(", glue set ");
if glue_sign(p)=shrinking then print("- ");
if abs(mem[p+glue_offset].int)<@'4000000 then print("?.?")
else if abs(g)>float_constant(20000) then
begin if g>float_constant(0) then print_char(">")
else print("< -");
print_glue(20000*unity,glue_order(p),0);
end
else print_glue(round(unity*g),glue_order(p),0);
@^real multiplication@>
end
@y
floating point underflow on the author's computer.
For the {\mc VAX}, the only possible random value that could hurt is
a reserved value with 1 in the sign bit and 0 for the (excess) exponent.
Because the sign-plus-exponent is in the middle of the word, the chances
of this happening are miniscule, and ignored here.
@^system dependencies@>
@^dirty \PASCAL@>
@<Display the value of |glue_set(p)|@>=
g:=float(glue_set(p));
if (g<>float_constant(0))and(glue_sign(p)<>normal) then
begin print(", glue set ");
if glue_sign(p)=shrinking then print("- ");
if abs(float(glue_set(p)))>20000.0 then
begin if float(glue_set(p))>0 then print_char(">")
else print("< -");
print_glue(20000*unity,glue_order(p),0);
end
else print_glue(round(float(glue_set(p))*unity),glue_order(p),0);
@^real multiplication@>
end
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [17.241] fix_date_and_time
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The following procedure, which is called just before \TeX\ initializes its
input and output, establishes the initial values of the date and time.
@^system dependencies@>
Since standard \PASCAL\ cannot provide such information, something special
is needed. The program here simply specifies July 4, 1776, at noon; but
users probably want a better approximation to the truth.
@p procedure fix_date_and_time;
begin time:=12*60; {minutes since midnight}
day:=4; {fourth day of the month}
month:=7; {seventh month of the year}
year:=1776; {Anno Domini}
end;
@y
@ The following procedure, which is called just before \TeX\ initializes its
input and output, establishes the initial values of the date and time.
It is calls an externally defined |date_and_time|, even though it could
be done from Pascal.
The external procedure also sets up interrupt catching.
@^system dependencies@>
@p procedure fix_date_and_time;
begin
date_and_time(time,day,month,year);
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.513] area and extension rules
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ The file names we shall deal with for illustrative purposes have the
following structure: If the name contains `\.>' or `\.:', the file area
consists of all characters up to and including the final such character;
otherwise the file area is null. If the remaining file name contains
`\..', the file extension consists of all such characters from the first
remaining `\..' to the end, otherwise the file extension is null.
@^system dependencies@>
We can scan such file names easily by using two global variables that keep track
of the occurrences of area and extension delimiters:
@<Glob...@>=
@!area_delimiter:pool_pointer; {the most recent `\.>' or `\.:', if any}
@!ext_delimiter:pool_pointer; {the relevant `\..', if any}
@y
@ The file names we shall deal with for illustrative purposes have the
following structure: If the name contains `\./', the file area
consists of all characters up to and including the final such character;
otherwise the file area is null. If the remaining file name contains
`\..', the file extension consists of all such characters from the first
remaining `\..' to the end, otherwise the file extension is null.
@^system dependencies@>
We can scan such file names easily by using two global variables that keep
track of the occurrences of area and extension delimiters:
@<Glob...@>=
@!area_delimiter:pool_pointer; {the most recent `\./', if any}
@!ext_delimiter:pool_pointer; {the most recent `\..', if any}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.514] TEX area directories
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d TEX_area=="TeXinputs:"
@.TeXinputs@>
@d TEX_font_area=="TeXfonts:"
@.TeXfonts@>
@y
Under System V {\mc UNIX}, the default paths are specified in a seprate
file, ``texpaths.h''. The file opening procedures do path searching
based either on those default paths, or on paths given by the user
in ``environment'' variables.
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.516] more_name
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
else begin if (c=">")or(c=":") then
@y
else begin if (c="/") then
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.520] default format
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d format_default_length=20 {length of the |TEX_format_default| string}
@d format_area_length=11 {length of its area part}
@d format_ext_length=4 {length of its `\.{.fmt}' part}
@y
Under System V {\mc UNIX} we don't give the area part, instead depending
on the path searching that will happen during file opening.
@d format_default_length=9 {length of the |TEX_format_default| string}
@d format_area_length=0 {length of its area part}
@d format_ext_length=4 {length of its `\.{.fmt}' part}
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.521] plain format location
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
TEX_format_default:='TeXformats:plain.fmt';
@y
TEX_format_default:='plain.fmt';
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.524] format file opening: only try once, with path search
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
pack_buffered_name(0,loc,j-1); {try first without the system file area}
if w_open_in(fmt_file) then goto found;
pack_buffered_name(format_area_length,loc,j-1);
{now try the system format file area}
if w_open_in(fmt_file) then goto found;
@y
pack_buffered_name(0,loc,j-1);
if w_open_in(fmt_file) then goto found;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.525] make_name_string
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
which simply makes a \TeX\ string from the value of |name_of_file|, should
ideally be changed to deduce the full name of file~|f|, which is the file
most recently opened, if it is possible to do this in a \PASCAL\ program.
@^system dependencies@>
This routine might be called after string memory has overflowed, hence
we dare not use `|str_room|'.
@p function make_name_string:str_number;
var k:1..file_name_size; {index into |name_of_file|}
begin if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings) then
make_name_string:="?"
else begin for k:=1 to name_length do append_char(xord[name_of_file[k]]);
make_name_string:=make_string;
end;
end;
@y
which simply makes a \TeX\ string from the value of |name_of_file|, should
ideally be changed to deduce the full name of file~|f|, which is the file
most recently opened, if it is possible to do this in a \PASCAL\ program.
With the System V {\mc UNIX} version, we know that |real_name_of_file|
contains |name_of_file| prepended with the directory name that was found
by path searching.
If |real_name_of_file| starts with |'./'|, we don't use that part of the
name, since {\mc UNIX} users understand that.
@^system dependencies@>
This routine might be called after string memory has overflowed, hence
we dare not use `|str_room|'.
@p function make_name_string:str_number;
var k,@!kstart:1..file_name_size; {index into |name_of_file|}
begin
k:=1;
while (k<file_name_size) and (xord[real_name_of_file[k]]<>" ") do
incr(k);
name_length:=k-1; {the real |name_length|}
if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings) then
make_name_string:="?"
else begin
if (xord[real_name_of_file[1]]=".") and (xord[real_name_of_file[2]]="/") then
kstart:=3
else
kstart:=1;
for k:=kstart to name_length do append_char(xord[real_name_of_file[k]]);
make_name_string:=make_string;
end
end;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.537] a_open_in of \input file needs path selector
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(cur_file) then goto done;
if cur_area="" then
begin pack_file_name(cur_name,TEX_area,cur_ext);
if a_open_in(cur_file) then goto done;
end;
@y
if a_open_in(cur_file,input_file_path) then goto done;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [29.537] get rid of return of name to string pool
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if name=str_ptr-1 then {we can conserve string pool space now}
begin flush_string; name:=cur_name;
end;
@y
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [30.563] opening tfm file: now path searching is done
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ @<Open |tfm_file| for input@>=
file_opened:=false;
if aire="" then pack_file_name(nom,TEX_font_area,".tfm")
else pack_file_name(nom,aire,".tfm");
if not b_open_in(tfm_file) then abort;
file_opened:=true
@y
@ @<Open |tfm_file| for input@>=
file_opened:=false;
pack_file_name(nom,aire,".tfm");
if not b_open_in(tfm_file) then abort;
file_opened:=true
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [30.564] reading the tfm file
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@d fget==get(tfm_file)
@d fbyte==tfm_file^
@y
For System V {\mc UNIX} we had to make the |byte_file| type have data of
type |char|. Fortunately all eight bits are read by |get|, and
the |ord| conversion does not do any range checking. Note that this trick
only works for a machine that does not sign extend characters.
If the machine did sign extend characters, we would have to add 256 to
a negative |ord| value.
@d fget==get(tfm_file)
@d fbyte==ord(tfm_file^)
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [32.597] write_dvi
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@p procedure write_dvi(@!a,@!b:dvi_index);
var k:dvi_index;
begin for k:=a to b do write(dvi_file,dvi_buf[k]);
end;
@y
For System V {\mc UNIX}, this is going to be handled by an external procedure,
|writedvi|, which will do the output using |fwrite|.
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [49.1275] a_open_in of \read file needs path specifier
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
if a_open_in(read_file[n]) then read_open[n]:=just_open;
@y
if a_open_in(read_file[n],read_file_path) then read_open[n]:=just_open;
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [51.1332] Add call to exit() depending upon value of `history'
% Also, add call to set_paths
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
@ Now this is really it: \TeX\ starts and ends here.
The initial test involving |ready_already| should be deleted if the
\PASCAL\ runtime system is smart enough to detect such a ``mistake.''
@y
@ Now this is really it: \TeX\ starts and ends here.
@z
@x
t_open_out; {open the terminal for output}
@y
t_open_out; {open the terminal for output}
set_paths;
@z
@x
final_end: ready_already:=0;
@y
final_end: ready_already:=0;
if (history <> spotless) and (history <> warning_issued) then
UNIXexit(1)
else
UNIXexit(0);
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [51.1333] print new line before termination; switch to editor if nec.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
print(log_name); print_char(".");
end;
end;
@y
print(log_name); print_char(".");
end;
end;
print_ln;
if (edit_name_start<>0) and (interaction>batch_mode) then
calledit(str_pool[edit_name_start],edit_name_length,edit_line);
@z
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% [54.1376] add editor-switch variables to globals
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@x
\f
@* \[54] System-dependent changes.
This section should be replaced, if necessary, by changes to the program
that are necessary to make \TeX\ work at a particular installation.
It is usually best to design your change file so that all changes to
previous sections preserve the section numbering; then everybody's version
will be consistent with the published program. More extensive changes,
which introduce new sections, can be inserted here; then only the index
itself will get a new section number.
@^system dependencies@>
@y
\f
@* \[54] System-dependent changes.
Here is a temporary integer, used as a holder during reading and writing of
TFM files.
Also, the variables used to hold ``switch-to-editor'' information.
@^system dependencies@>
@<Globals...@>=
@!edit_name_start: pool_pointer;
@!edit_name_length,@!edit_line: integer;
@ The |edit_name_start| will be set to point into |str_pool| somewhere after
its beginning if \TeX\ is supposed to switch to an editor on exit.
@<Set init...@>=
edit_name_start:=0;
@z
SHAR_EOF
cat << \SHAR_EOF > ini_to_trip.BSD4_n
#! /bin/csh
# A shell script to perform modifications on the changefile for initex
# to make a changefile for an triptex (used to test tex).
#
# To use it, say
# initotrip initex.ch triptex.ch
#
ed - $1 <<edscriptend
/@!mem_max=/
//
s/[0-9][0-9]*/3000/p
/@!mem_min=/
s/-[0-9]*/1/p
/@!error_line=/
s/[0-9][0-9]*/64/p
/@!half_error_line=/
s/[0-9][0-9]*/32/p
/@!max_print_line=/
s/[0-9][0-9]*/72/p
/@!pool_name=/
s|tex.pool|triptex.pool|p
/@d mem_bot=/
//
s/-[0-9]*/1/p
/@d mem_top==/
s/[0-9][0-9]*/3000/p
w $2
edscriptend
SHAR_EOF
cat << \SHAR_EOF > ini_to_trip.PYR
#! /bin/csh
# A shell script to perform modifications on the changefile for initex
# to make a changefile for an triptex (used to test tex).
#
# To use it, say
# initotrip initex.ch triptex.ch
#
ed - $1 <<edscriptend
/@!mem_max=/
//
s/[0-9][0-9]*/3000/p
/@!mem_min=/
s/-[0-9]*/1/p
/@!error_line=/
s/[0-9][0-9]*/64/p
/@!half_error_line=/
s/[0-9][0-9]*/32/p
/@!max_print_line=/
s/[0-9][0-9]*/72/p
/@!pool_name=/
s|tex.pool|triptex.pool|p
/@d mem_bot=/
//
s/[0-9]*/1/p
/@d mem_top==/
s/[0-9][0-9]*/3000/p
w $2
edscriptend
SHAR_EOF
cat << \SHAR_EOF > ini_to_trip.SYS_V
#
# A shell script to perform modifications on the changefile for initex
# to make a changefile for an triptex (used to test tex).
#
# To use it, say
# initotrip initex.ch triptex.ch
#
ed - $1 <<edscriptend
/@!mem_max=/
//
s/[0-9][0-9]*/3000/p
/@!mem_min=/
s/[0-9][0-9]*/1/p
/@!error_line=/
s/[0-9][0-9]*/64/p
/@!half_error_line=/
s/[0-9][0-9]*/32/p
/@!max_print_line=/
s/[0-9][0-9]*/72/p
/@!pool_name=/
s|tex.pool|triptex.pool|p
/@d mem_bot=/
//
s/[0-9][0-9]*/1/p
/@d mem_top==/
s/[0-9][0-9]*/3000/p
w $2
edscriptend
SHAR_EOF
cat << \SHAR_EOF > ini_to_vir.BSD4_n
#! /bin/csh
# A shell script to perform modifications on the changefile for initex
# to make a changefile for virtex. This means changing constants and
# debug..gubed, init..tini, stat..tats.
#
# To use it, say
# initovir initex.ch virtex.ch
#
ed - $1 <<edscriptend
/@d debug==/
//
s//&@{/p
/@d gubed==/
s//&@}/p
/@d stat==/
//
s//&@{/p
/@d tats==/
s//&@}/p
/@d init==/
//
s//&@{/p
/@d tini==/
s//&@}/p
/@!mem_max=/
//
s/[0-9][0-9]*/32700/p
/@!trie_size=/
s/[0-9][0-9]*/6500/p
w $2
edscriptend
SHAR_EOF
cat << \SHAR_EOF > ini_to_vir.PYR
#! /bin/csh
# A shell script to perform modifications on the changefile for initex
# to make a changefile for virtex. This means changing constants and
# debug..gubed, init..tini, stat..tats.
#
# To use it, say
# initovir initex.ch virtex.ch
#
ed - $1 <<edscriptend
/@d debug==/
//
s//&@{/p
/@d gubed==/
s//&@}/p
/@d stat==/
//
s//&@{/p
/@d tats==/
s//&@}/p
/@d init==/
//
s//&@{/p
/@d tini==/
s//&@}/p
/@!mem_max=/
//
s/[0-9][0-9]*/65000/p
/@!trie_size=/
s/[0-9][0-9]*/6500/p
w $2
edscriptend
SHAR_EOF
cat << \SHAR_EOF > ini_to_vir.SYS_V
# A shell script to perform modifications on the changefile for initex
# to make a changefile for virtex. This means changing constants and
# debug..gubed, init..tini, stat..tats.
#
# To use it, say
# initovir initex.ch virtex.ch
#
ed - $1 <<edscriptend
/@d debug==/
//
s//&@{/p
/@d gubed==/
s//&@}/p
/@d stat==/
//
s//&@{/p
/@d tats==/
s//&@}/p
/@d init==/
//
s//&@{/p
/@d tini==/
s//&@}/p
/@!mem_max=/
//
s/[0-9][0-9]*/65000/p
/@!trie_size=/
s/[0-9][0-9]*/6500/p
w $2
edscriptend
SHAR_EOF
cat << \SHAR_EOF > maketex.SYS_V
# change the following to remove intermediate files
RM=echo
# definitions needed for Pascal compilation
PC0=/usr/lib/pc0
PC1=/usr/lib/pc1
PC2=/usr/lib/pc2
# compile with no range check
PC0OPTS="-T r"
# where assembler temporaries are put
TMPDIR=/usr/tmp
export TMPDIR
case $# in
1)
;;
*)
echo "usage: $0 tex"
exit 1
;;
esac
name=$1
# break up the monolithic pascal source into
# six pieces. this prevents the System V Pascal
# compiler or assembler from running out of internal
# table space.
sed -e "s/texsep/$name/" <texsep.sed >$name.sed
sed -f $name.sed <$name.p
$RM $name.sed
# simulate pc -c on each individual piece.
# we don't use pc because it insists on placing temporaries
# in /tmp, and we don't have much disk space there.
# see also the definition of TMPDIR above.
for i in 1 2 3 4 5 6
do
piece=${name}$i
$PC0 -o $piece.0 $PC0OPTS $piece.p
$PC1 <$piece.0 >$piece.s
# UGLY! the last piece can't use the optimizer.
# (we get a stack overflow exception)
case $i in
[1-5])
$PC2 <$piece.s >$piece.0
as -o $piece.o $piece.0
;;
6)
as -o $piece.o $piece.s
;;
esac
$RM $piece.0 $piece.s
done
pc -o $name ${name}6.o ${name}[1-5].o ext.o
SHAR_EOF
cat << \SHAR_EOF > texsep.SYS_V.sed
/^ procedure/{
s/$/ external;/w texsep1.h
s/^\( procedure [^(;]*\).*/\1;/
}
/^ function/{
s/$/ external;/w texsep1.h
s/^\( function [^(:]*\).*/\1;/
}
/^program/,/^const/{
/^const/b co
w texsep0.h
d
}
:co
/^const/,/^ procedure initialize/{
/^ procedure initialize/b t1
w texsep1.h
d
}
:t1
/^ procedure initialize/,/^ procedure getnext/{
/^ procedure getnext/b t2
/^ procedure initialize/s/^/#include "texsep1.h"\
/
w texsep1.p
d
}
:t2
/^ procedure getnext/,/^ procedure scanspec/{
/^ procedure scanspec/b t3
/^ procedure getnext/s/^/#include "texsep1.h"\
/
w texsep2.p
d
}
:t3
/^ procedure scanspec/,/^ function finiteshrink/{
/^ function finiteshrink/b t4
/^ procedure scanspec/s/^/#include "texsep1.h"\
/
w texsep3.p
d
}
:t4
/^ function finiteshrink/,/^ procedure appspace/{
/^ procedure appspace/b t5
/^ function finiteshrink/s/^/#include "texsep1.h"\
/
w texsep4.p
d
}
:t5
/^ procedure appspace/,/^ procedure doassignments/{
/^ procedure doassignments/b t6
/^ procedure appspace/s/^/#include "texsep1.h"\
/
w texsep5.p
d
}
:t6
/^ procedure doassignments/,${
/^ procedure doassignments/s/^/#include "texsep0.h"\
#include "texsep1.h"\
/
w texsep6.p
d
}
SHAR_EOF
# End of shell archive
exit 0