Mercurial > hg > index.cgi
view lwar/extract.c @ 265:6f4c4d59666f
Make lwar use the "b" flag when opening files.
Due to the dumbness on Windows systems related to text vs. binary file
distinctions, one needs to add 'b' to fopen() calls when dealing with binary
files.
author | William Astle <lost@l-w.ca> |
---|---|
date | Sun, 10 Feb 2013 19:22:24 -0700 |
parents | 346966cffeef |
children | 45df37e81741 |
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/* extract.c Copyright © 2009 William Astle This file is part of LWAR. LWAR 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 3 of the License, or (at your option) any later version. This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "lwar.h" void do_extract(void) { FILE *f; char buf[8]; long l; int c; char fnbuf[1024]; int i; FILE *nf; f = fopen(archive_file, "rb"); if (!f) { perror("Opening archive file"); exit(1); } (void)(fread(buf, 1, 6, f) && 1); if (memcmp("LWAR1V", buf, 6)) { fprintf(stderr, "%s is not a valid archive file.\n", archive_file); exit(1); } for (;;) { c = fgetc(f); if (ferror(f)) { perror("Reading archive file"); exit(1); } if (c == EOF) return; // find the end of the file name if (!c) return; i = 0; while (c) { fnbuf[i++] = c; c = fgetc(f); if (c == EOF || ferror(f)) { fprintf(stderr, "Bad archive file\n"); exit(1); } } fnbuf[i] = 0; // get length of archive member l = 0; c = fgetc(f); l = c << 24; c = fgetc(f); l |= c << 16; c = fgetc(f); l |= c << 8; c = fgetc(f); l |= c; for (i = 0; i < nfiles; i++) { if (!strcmp(files[i], fnbuf)) break; } if (i < nfiles || nfiles == 0) { // extract the file nf = fopen(fnbuf, "wb"); if (!nf) { fprintf(stderr, "Cannot extract '%s': %s\n", fnbuf, strerror(errno)); exit(1); } while (l) { c = fgetc(f); fputc(c, nf); l--; } fclose(nf); } else { // skip the file fseek(f, l, SEEK_CUR); } } }