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    Length: 4249 (0x1099)
    Types: TextFile
    Names: »showtfmwidth.c«

└─⟦060c9c824⟧ Bits:30007080 DKUUG TeX 2/12/89
    └─⟦this⟧ »./DVIware/laser-setters/umd-dvi/misc/showtfmwidth.c« 
└─⟦52210d11f⟧ Bits:30007239 EUUGD2: TeX 3 1992-12
    └─⟦af5ba6c8e⟧ »unix3.0/DVIWARE.tar.Z« 
        └─⟦ca79c7339⟧ 
            └─⟦this⟧ »DVIware/laser-setters/mctex/misc/mf79/showtfmwidth.c« 

TextFile

#ifndef lint
static char rcsid[] = "$Header$";
#endif

FIXME (use new tfm library routines)

#include <stdio.h>
#include "../h/types.h"
#include "../h/fio.h"

char *ProgName;
char *getenv ();

struct tfmheader {
    int th_lf;			/* length of the file (words) */
    int th_lh;			/* length of the header data (words) */
    int th_bc;			/* smallest char code in font */
    int th_ec;			/* largest char code in font (inclusive) */
    int th_nw;			/* number of words in width table */
    int th_nh;			/* number of words in height table */
    int th_nd;			/* number of words in depth table */
    int th_ni;			/* number of words in ital. corr. table */
    int th_nl;			/* number of words in lig/kern table */
    int th_nk;			/* number of words in kern table */
    int th_ne;			/* number of words in extensible char table */
    int th_np;			/* number of font param words */
};

/*
 * The rest of the TFM file is composed of the following information,
 * all of which are 32 bit quantities:
 *
 * header:	array [0..lh-1] of stuff
 * char_info:	array [bc..ec] of char_info_word
 * width:	array [0..nw-1] of fix_word
 * height:	array [0..nh-1] of fix_word
 * depth:	array [0..nd-1] of fix_word
 * italic:	array [0..ni-1] of fix_word
 * lig_kern:	array [0..nl-1] of lig_kern_command
 * kern:	array [0..nk-1] of fix_word
 * exten:	array [0..ne-1] of extensible_recipie
 * param:	array [1..np] of fix_word
 *
 * We are interested only in the width information.  This can be
 * found by taking the first byte of each of the char_info_words
 * and using it as an index in the width table.  That is, the
 * width of character $n$ is width[char_info[$n$-$bc$].width_index].
 */

struct char_info_word {
    char width_index;
    char height_and_depth_index;
    char italic_index_and_tag;
    char remainder;
};

char  *tfname;
FILE  *tf;
struct tfmheader th;
i32   *width;
struct char_info_word *char_info;

#ifdef notdef
extern char *optarg;
extern int   optind;
#endif

extern int   errno;

main (argc, argv)
int argc;
char **argv;
{
    register int i;

    ProgName = argv[0];
    if (argc != 2)
	error (1, 0, "usage: %s tfmfile\n", ProgName);
    tfname = argv[1];
    if ((tf = fopen (tfname, "r")) == NULL)
	error (1, errno, "can't open %s", tfname);
    ReadTFMHeader ();
    if (th.th_ec < th.th_bc)
	error (1, 0, "no characters in %s!?", tfname);
    if (th.th_bc < 0 || th.th_ec > 127)
	error (1, 0, "I don't see how %s can correspond to a PXL file.",
		tfname);
    AllocateCharTable (th.th_ec - th.th_bc + 1);
    AllocateWidthTable (th.th_nw);
    SkipHeader ();
    ReadCharInfo (th.th_ec - th.th_bc + 1);
    ReadWidthTable (th.th_nw);
    for (i = th.th_bc; i <= th.th_ec; i++)
	    show (i);
    exit (0);
}

show (c)
register int c;
{
    long    w = width[char_info[c - th.th_bc].width_index];
    char    buf[3];
    char   *blanks;

    if (c >= 32 && c < 127)
	buf[0] = c, buf[1] = 0, blanks = " ";
    else
	buf[0] = '^', buf[1] = c ^ 64, buf[2] = 0, blanks = "";
    printf ("%3d (%s)%s width = %9ld\n", c, buf, blanks, w);
}

AllocateCharTable (n)
register int n; {
    char_info = (struct char_info_word *) malloc (n * sizeof *char_info);
    if (char_info == 0)
	error (1, errno, "unable to allocate %d char table entries", n);
}

AllocateWidthTable (n)
register int n; {
    width = (i32 *) malloc (n * sizeof *width);
    if (width == 0)
	error (1, errno, "unable to allocate %d width table entries", n);
}

/* ``cheating'' */
ReadTFMHeader () {
    register int *ip, i;

    for (ip = &th.th_lf; ip <= &th.th_np;) {
	i = UnSign16 (GetWord (tf));
	*ip++ = i;
    }
}

SkipHeader () {
    fseek (tf, (long) th.th_lh * sizeof (i32), 1);
}

ReadCharInfo (n)
register int n; {
    register struct char_info_word *ci;

    for (ci = char_info; --n >= 0; ci++) {
	ci -> width_index = getc (tf);
	ci -> height_and_depth_index = getc (tf);
	ci -> italic_index_and_tag = getc (tf);
	ci -> remainder = getc (tf);
    }
    if (feof (tf))
	error (1, 0, "unexpected EOF -- are you sure %s is a tfm file?",
		tfname);
}

ReadWidthTable (n)
register int n; {
    register i32 *ip;

    for (ip = width; --n >= 0; ip++)
	fGetLong (tf, *ip);

    if (feof (tf))
	error (1, 0, "unexpected EOF -- are you sure %s is a tfm file?",
		tfname);
}