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view lwar/add.c @ 280:4370370f38d1
Correct CRC problems with DTS pseudo op
DTS actually emitted its code during the parse phase. While the code was
actually correct, this messed with the OS9 module CRC calculation, probably
due to the calculation being in the wrong order. The order of calculations
for a CRC do matter.
author | William Astle <lost@l-w.ca> |
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date | Tue, 16 Jul 2013 21:46:12 -0600 |
parents | 6f4c4d59666f |
children | 45df37e81741 |
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/* add.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/>. Implements the program startup code */ #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "lwar.h" void do_add(void) { FILE *f; unsigned char buf[8]; long l; int c; FILE *f2; int i; f = fopen(archive_file, "rb+"); if (!f) { if (errno == ENOENT) { f = fopen(archive_file, "wb"); if (f) { fputs("LWAR1V", f); goto doadd; } } perror("Cannot open archive file"); } (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 (c == EOF && ferror(f)) { perror("Reading archive file"); exit(1); } if (c == EOF) goto doadd; if (!c) { fseek(f, -1, SEEK_CUR); goto doadd; } // find the end of the file name while (c) { c = fgetc(f); if (c == EOF || ferror(f)) { fprintf(stderr, "Bad archive file\n"); exit(1); } } // 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; fseek(f, l, SEEK_CUR); } // back up to the NUL byte at the end of the file fseek(f, -1, SEEK_CUR); doadd: for (i = 0; i < nfiles; i++) { f2 = fopen(files[i], "rb"); if (!f2) { fprintf(stderr, "Cannot open file %s:", files[i]); perror(""); exit(1); } (void)(fread(buf, 1, 6, f2) && 1); if (mergeflag && !memcmp("LWAR1V", buf, 6)) { // add archive contents... for (;;) { c = fgetc(f2); if (c == EOF || ferror(f2)) { perror("Reading input archive file"); exit(1); } if (c == EOF) break; if (!c) { break; } // find the end of the file name while (c) { fputc(c, f); c = fgetc(f2); if (c == EOF || ferror(f)) { fprintf(stderr, "Bad input archive file\n"); exit(1); } } fputc(0, f); // get length of archive member l = 0; c = fgetc(f2); fputc(c, f); l = c << 24; c = fgetc(f2); fputc(c, f); l |= c << 16; c = fgetc(f2); fputc(c, f); l |= c << 8; c = fgetc(f2); fputc(c, f); l |= c; while (l) { c = fgetc(f2); fputc(c, f); l--; } } fclose(f2); continue; } fseek(f2, 0, SEEK_END); l = ftell(f2); fseek(f2, 0, SEEK_SET); fputs(files[i], f); fputc(0, f); fputc(l >> 24, f); fputc((l >> 16) & 0xff, f); fputc((l >> 8) & 0xff, f); fputc(l & 0xff, f); while (l) { c = fgetc(f2); fputc(c, f); l--; } } // flag end of file fputc(0, f); }