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view lwar/add.c @ 295:4b17780f2777 ccdev
Checkpoint lwcc development
Changed tactics with the preprocessor. Instead of getting clever and trying
to do things the "fast" way, instead, just tokenize the whole input and
process it that way. Also, set up so the preprocessor and compiler can be
integrated instead of having to have a specifically correct output for the
preprocessed file.
Also removed the subdirectories in the lwcc directory. It made things more
complicated than they needed to be.
author | William Astle <lost@l-w.ca> |
---|---|
date | Thu, 12 Sep 2013 22:06:26 -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); }