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t1ascii.c
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1992-09-26
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/* t1ascii
*
* This program takes an Adobe Type-1 font program in binary (PFB) format and
* converts it to ASCII (PFA) format.
*
* Copyright (c) 1992 by I. Lee Hetherington, all rights reserved.
*
* Permission is hereby granted to use, modify, and distribute this program
* for any purpose provided this copyright notice and the one below remain
* intact.
*
* I. Lee Hetherington (ilh@lcs.mit.edu)
*
* $Log: t1ascii.c,v $
* Revision 1.1 92/05/22 11:47:24 ilh
* initial version
*
*/
#ifndef lint
static char rcsid[] =
"@(#) $Id: t1ascii.c,v 1.1 92/05/22 11:47:24 ilh Exp $";
static char copyright[] =
"@(#) Copyright (c) 1992 by I. Lee Hetherington, all rights reserved.";
#endif
/* Note: this is ANSI C. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define MARKER 128
#define ASCII 1
#define BINARY 2
#define DONE 3
static FILE *ifp = stdin;
static FILE *ofp = stdout;
/* This function reads a four-byte block length. */
static int read_length()
{
int length;
length = fgetc(ifp);
length |= fgetc(ifp) << 8;
length |= fgetc(ifp) << 16;
length |= fgetc(ifp) << 24;
return length;
}
/* This function outputs a single byte in hexadecimal. It limits hexadecimal
output to 64 columns. */
static void output_hex(int b)
{
static char *hexchar = "0123456789ABCDEF";
static int hexcol = 0;
/* trim hexadecimal lines to 64 columns */
if (hexcol >= 64) {
fputc('\n', ofp);
hexcol = 0;
}
fputc(hexchar[(b >> 4) & 0xf], ofp);
fputc(hexchar[b & 0xf], ofp);
hexcol += 2;
}
static void usage()
{
fprintf(stderr,
"usage: t1ascii [input [output]]\n");
exit(1);
}
static void print_banner()
{
static char rcs_revision[] = "$Revision: 1.1 $";
static char revision[20];
if (sscanf(rcs_revision, "$Revision: %19s", revision) != 1)
revision[0] = '\0';
fprintf(stderr, "This is t1ascii %s.\n", revision);
}
int main(int argc, char **argv)
{
int c, block = 1, length, last_type = ASCII;
print_banner();
if (argc > 3)
usage();
/* possibly open input & output files */
if (argc >= 2) {
ifp = fopen(argv[1], "r");
if (!ifp) {
fprintf(stderr, "error: cannot open %s for reading\n", argv[1]);
exit(1);
}
}
if (argc == 3) {
ofp = fopen(argv[2], "w");
if (!ofp) {
fprintf(stderr, "error: cannot open %s for writing\n", argv[2]);
exit(1);
}
}
/* main loop through blocks */
for (;;) {
c = fgetc(ifp);
if (c == EOF) {
break;
}
if (c != MARKER) {
fprintf(stderr,
"error: missing marker (128) at beginning of block %d",
block);
exit(1);
}
switch (c = fgetc(ifp)) {
case ASCII:
if (last_type != ASCII)
fputc('\n', ofp);
last_type = ASCII;
for (length = read_length(); length > 0; length--)
if ((c = fgetc(ifp)) == '\r')
fputc('\n', ofp);
else
fputc(c, ofp);
break;
case BINARY:
last_type = BINARY;
for (length = read_length(); length > 0; length--)
output_hex(fgetc(ifp));
break;
case DONE:
/* nothing to be done --- will exit at top of loop with EOF */
break;
default:
fprintf(stderr, "error: bad block type %d in block %d\n",
c, block);
break;
}
block++;
}
fclose(ifp);
fclose(ofp);
return 0;
}