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Length: 9901 (0x26ad)
Types: TextFile
Names: »rcsdiff.c«
└─⟦a05ed705a⟧ Bits:30007078 DKUUG GNU 2/12/89
└─⟦d7c6f1edc⟧ »./rcs.tar.Z«
└─⟦b893ff3cc⟧
└─⟦this⟧ »rcs/src/rcsdiff.c«
/*
* RCS rcsdiff operation
*/
#ifndef lint
static char rcsid[]=
"$Header: /usr/src/local/bin/rcs/src/RCS/rcsdiff.c,v 4.6 89/05/01 15:12:27 narten Exp $ Purdue CS";
#endif
/*****************************************************************************
* generate difference between RCS revisions
*****************************************************************************
*/
/* Copyright (C) 1982, 1988, 1989 Walter Tichy
Distributed under license by the Free Software Foundation, Inc.
This file is part of RCS.
RCS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
RCS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with RCS; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
Report problems and direct all questions to:
rcs-bugs@cs.purdue.edu
*/
/* $Log: rcsdiff.c,v $
* Revision 4.6 89/05/01 15:12:27 narten
* changed copyright header to reflect current distribution rules
*
* Revision 4.5 88/11/08 12:01:51 narten
* changes from eggert@sm.unisys.com (Paul Eggert)
*
* Revision 4.5 88/08/09 19:12:41 eggert
* Use execv(), not system(); yield exit status like diff(1)s; allow cc -R.
*
* Revision 4.4 87/12/18 11:37:46 narten
* changes Jay Lepreau made in the 4.3 BSD version, to add support for
* "-i", "-w", and "-t" flags and to permit flags to be bundled together,
* merged in.
*
* Revision 4.3 87/10/18 10:31:42 narten
* Updating version numbers. Changes relative to 1.1 actually
* relative to 4.1
*
* Revision 1.3 87/09/24 13:59:21 narten
* Sources now pass through lint (if you ignore printf/sprintf/fprintf
* warnings)
*
* Revision 1.2 87/03/27 14:22:15 jenkins
* Port to suns
*
* Revision 1.1 84/01/23 14:50:18 kcs
* Initial revision
*
* Revision 4.1 83/05/03 22:13:19 wft
* Added default branch, option -q, exit status like diff.
* Added fterror() to replace faterror().
*
* Revision 3.6 83/01/15 17:52:40 wft
* Expanded mainprogram to handle multiple RCS files.
*
* Revision 3.5 83/01/06 09:33:45 wft
* Fixed passing of -c (context) option to diff.
*
* Revision 3.4 82/12/24 15:28:38 wft
* Added call to catchsig().
*
* Revision 3.3 82/12/10 16:08:17 wft
* Corrected checking of return code from diff; improved error msgs.
*
* Revision 3.2 82/12/04 13:20:09 wft
* replaced getdelta() with gettree(). Changed diagnostics.
*
* Revision 3.1 82/11/28 19:25:04 wft
* Initial revision.
*
*/
#include <ctype.h>
#include "rcsbase.h"
#define ERRCODE 2 /*error code for exit status */
extern char *rindex();
#ifndef lint
static char rcsbaseid[] = RCSBASE;
#endif
static char co[] = CO;
extern int cleanup(); /* cleanup after signals */
extern char * mktempfile(); /*temporary file name generator */
extern int fterror(); /*forward for special fatal error func. */
extern struct hshentry * genrevs(); /*generate delta numbers */
extern int nerror; /*counter for errors */
extern int quietflag; /*suppresses diagnostics */
extern FILE * finptr; /* RCS input file */
char *RCSfilename;
char *workfilename;
char * temp1file, * temp2file;
char bops[10];
char otherops[10];
main (argc, argv)
int argc; char **argv;
{
char * cmdusage;
char commarg[revlength+3];
int revnums; /* counter for revision numbers given */
char * rev1, * rev2; /* revision numbers from command line */
char numericrev[revlength]; /* holds expanded revision number */
char * xrev1, * xrev2; /* expanded revision numbers */
struct hshentry * gendeltas[hshsize];/*stores deltas to be generated*/
struct hshentry * target;
char * boption, * otheroption;
int exit_stats;
int diffs_found;
char *argp;
register c;
catchints();
otheroption = otherops + 2;
boption = bops + 2;
cmdid = "rcsdiff";
cmdusage = "command format:\n rcsdiff [-biwt] [-q] [-cefhn] [-rrev1] [-rrev2] file";
diffs_found=revnums=0;
while (--argc,++argv, argc>=1 && ((*argv)[0] == '-')) {
argp = &((*argv)[1]);
while (c = *argp++) switch (c) {
case 'r':
if (*argp!='\0') {
if (revnums==0) {
rev1= argp; revnums=1;
} elif (revnums==1) {
rev2= argp; revnums=2;
} else {
fterror("too many revision numbers");
}
} /* do nothing for empty -r */
argp += strlen(argp);
break;
case 'b':
case 'i':
case 'w':
case 't':
if (!rindex(bops + 2, c))
*boption++ = c;
break;
case 'q':
quietflag=true;
break;
case 'c':
case 'e':
case 'f':
case 'h':
case 'n':
if (otheroption == otherops + 2) {
*otheroption++ = c;
if (c == 'c' && isdigit(*argp)) {
while (isdigit(*argp) && otheroption < otherops+sizeof(otherops)-1)
*otheroption++ = *argp++;
if (*argp)
faterror("-c: bad count");
argp = "";
}
} else {
fterror("Options c,e,f,h,n are mutually exclusive");
}
break;
default:
fterror("unknown option: %s\n%s", *argv,cmdusage);
};
} /* end of option processing */
if (boption != bops + 2) {
bops[0] = ' ';
bops[1] = '-';
boption = bops;
}
if (otheroption != otherops + 2) {
otherops[0] = ' ';
otherops[1] = '-';
otheroption = otherops;
}
if (argc<1) fterror("No input file\n%s",cmdusage);
/* now handle all filenames */
do {
finptr=NULL;
if (pairfilenames(argc,argv,true,false)!=1) continue;
diagnose("===================================================================");
diagnose("RCS file: %s",RCSfilename);
if (revnums<2 && !(access(workfilename,4)==0)) {
error("Can't open %s",workfilename);
continue;
}
if (!trysema(RCSfilename,false)) continue; /* give up */
gettree(); /* reads in the delta tree */
if (Head==nil) {
error("no revisions present");
continue;
}
if (revnums==0)
rev1=Dbranch!=nil?Dbranch->num:Head->num; /* default rev1 */
if (!expandsym(rev1,numericrev)) continue;
if (!(target=genrevs(numericrev,(char *)nil,(char *)nil,(char *)nil,gendeltas))) continue;
xrev1=target->num;
if (revnums==2) {
if (!expandsym(rev2,numericrev)) continue;
if (!(target=genrevs(numericrev,(char *)nil,(char *)nil,(char *)nil,gendeltas))) continue;
xrev2=target->num;
}
temp1file=mktempfile("/tmp/",TMPFILE1);
diagnose("retrieving revision %s",xrev1);
VOID sprintf(commarg,"-p%s",xrev1);
if (run((char*)nil,temp1file, co,"-q",commarg,RCSfilename,(char*)nil)){
error("co failed");
continue;
}
if (revnums<=1) {
temp2file=workfilename;
diagnose("diff%s%s -r%s %s",boption,otheroption,xrev1,workfilename);
} else {
temp2file=mktempfile("/tmp/",TMPFILE2);
diagnose("retrieving revision %s",xrev2);
VOID sprintf(commarg,"-p%s",xrev2);
if (run((char*)nil,temp2file, co,"-q",commarg,RCSfilename,(char *)nil)){
error("co failed");
continue;
}
diagnose("diff%s%s -r%s -r%s",boption,otheroption,xrev1,xrev2);
}
exit_stats =
*boption
? *otheroption
? run((char*)nil,(char*)nil, DIFF, boption+1, otheroption+1, temp1file,temp2file,(char*)nil)
: run((char*)nil,(char*)nil, DIFF, boption+1, temp1file,temp2file,(char*)nil)
: *otheroption
? run((char*)nil,(char*)nil, DIFF, otheroption+1, temp1file,temp2file,(char*)nil)
: run((char*)nil,(char*)nil, DIFF, temp1file,temp2file,(char*)nil);
if (exit_stats == (1 << BYTESIZ))
diffs_found = 1;
else if (exit_stats != 0) {
error ("diff failed");
continue;
}
} while (cleanup(),
++argv, --argc >=1);
exit(nerror ? ERRCODE : diffs_found);
}
/*VARARGS3*/
fterror(e, e1, e2)
char * e, * e1, * e2;
/* prints error message and terminates program with ERRCODE */
{ nerror++;
VOID fprintf(stderr,"%s error: ",cmdid);
VOID fprintf(stderr,e, e1, e2);
VOID fprintf(stderr,"\n%s aborted\n",cmdid);
VOID cleanup();
exit(ERRCODE);
}