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PPM header parser improved: now able to skip comments.

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This commit is contained in:
Andrey Kiselev 2003-05-05 10:40:04 +00:00
parent d7adbd23df
commit ac3f89b460
1 changed files with 30 additions and 6 deletions
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36
tools/ppm2tiff.c
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@ -1,4 +1,4 @@
/* $Header: /cvs/maptools/cvsroot/libtiff/tools/ppm2tiff.c,v 1.5 2003-03-12 14:05:06 dron Exp $ */
/* $Header: /cvs/maptools/cvsroot/libtiff/tools/ppm2tiff.c,v 1.6 2003-05-05 10:40:04 dron Exp $ */
/*
* Copyright (c) 1991-1997 Sam Leffler
@ -74,6 +74,10 @@ main(int argc, char* argv[])
extern int optind;
extern char* optarg;
if ( argc < 2 ) {
fprintf(stderr, "%s: Too few arguments\n", argv[0]);
usage();
}
while ((c = getopt(argc, argv, "c:r:R:")) != -1)
switch (c) {
case 'c': /* compression scheme */
@ -112,9 +116,9 @@ main(int argc, char* argv[])
in = stdin;
}
if (getc(in) != 'P')
if (fgetc(in) != 'P')
BadPPM(infile);
switch (getc(in)) {
switch (fgetc(in)) {
case '5': /* it's a PGM file */
spp = 1;
photometric = PHOTOMETRIC_MINISBLACK;
@ -129,9 +133,30 @@ main(int argc, char* argv[])
default:
BadPPM(infile);
}
/* Parse header */
while(1) {
if (feof(in))
BadPPM(infile);
c = fgetc(in);
/* Skip whitespaces (blanks, TABs, CRs, LFs) */
if (strchr(" \t\r\n", c))
continue;
/* Check fo comment line */
if (c == '#') {
do {
c = fgetc(in);
} while(!strchr("\r\n", c) || feof(in));
continue;
}
ungetc(c, in);
break;
}
if (fscanf(in, " %ld %ld %d", &w, &h, &prec) != 3)
BadPPM(infile);
if (getc(in) != '\n' || w <= 0 || h <= 0 || prec != 255)
if (fgetc(in) != '\n' || w <= 0 || h <= 0 || prec != 255)
BadPPM(infile);
out = TIFFOpen(argv[optind], "w");
@ -220,9 +245,8 @@ char* stuff[] = {
"",
" -c jpeg[:opts] compress output with JPEG encoding",
" -c lzw[:opts] compress output with Lempel-Ziv & Welch encoding",
" (no longer supported by default due to Unisys patent enforcement)",
" -c zip[:opts] compress output with deflate encoding",
" -c packbits compress output with packbits encoding",
" -c packbits compress output with packbits encoding (the default)",
" -c none use no compression algorithm on output",
"",
"JPEG options:",