Mercurial > hg > index.cgi
view lwar/add.c @ 396:d0c0fede5021
Update to gcc6809lw patch which may help compilation of some sources
Due to persistent random compiler crashes and errors related to "M_REGS",
this patch update (4.6.4-2) essentially removes the varius constraints
allowing the "soft registers" in most operations. It was causing more
problems than it solved and it is not clear that the logic behind those soft
registers even makes sense any more.
This patch also fixes a bogus comparison related to selecting the right size
for a constant. Instead of the excessively clever comparison scheme that was
previously in use, the comparisons have been replaced with straight forward
comparisions for the top and bottom of the relevant 2's complement ranges.
author | William Astle <lost@l-w.ca> |
---|---|
date | Mon, 20 Jul 2015 22:32:41 -0600 |
parents | 6f4c4d59666f |
children | 45df37e81741 |
line wrap: on
line source
/* 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); }