91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/*
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* Copyright (c) 2025 Lucas Gabriel Vuotto <lucas@lgv5.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "bt.h"
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#define GROWTH_FACTOR 1024
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static void
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usage(void)
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{
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fprintf(stderr, "Usage: %s [torrent-file]\n", getprogname());
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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struct bcode *bcode;
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uint8_t *buf, *p;
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FILE *fp;
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size_t n, bufcap, bufsz;
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argc--;
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argv++;
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if (argc > 1)
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usage();
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if (argc == 1) {
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fp = fopen(argv[0], "r");
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if (fp == NULL)
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err(1, "fopen");
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} else
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fp = stdin;
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buf = malloc(GROWTH_FACTOR);
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if (buf == NULL)
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err(1, "out of memory");
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bufcap = GROWTH_FACTOR;
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bufsz = 0;
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for (;;) {
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if (bufsz > bufcap - GROWTH_FACTOR) {
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if (bufcap > SIZE_MAX / 2)
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errx(1, "out of memory");
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p = reallocarray(buf, bufcap * 2, 1);
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if (p == NULL)
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err(1, "out of memory");
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buf = p;
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bufcap *= 2;
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}
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n = fread(&buf[bufsz], 1, GROWTH_FACTOR, fp);
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if (ferror(fp))
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err(1, "fread");
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bufsz += n;
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if (feof(fp))
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break;
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}
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bcode = bcode_parse(buf, bufsz);
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if (bcode == NULL)
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errx(1, "bcode_parse: parse error");
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bcode_print(stdout, bcode);
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bcode_free(bcode);
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free(buf);
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if (fp != stdin)
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(void)fclose(fp);
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return 0;
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}
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