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54c93cb4af
The test-sha1 helper program will run our internal sha1 routines over its input and output the 40-byte hex sha1. Sometimes, however, it is useful to have the binary 20-byte sha1 (and it's a pain to convert back in the shell). Let's add a "-b" option to output the binary version. Signed-off-by: Jeff King <peff@peff.net> Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
57 lines
941 B
C
57 lines
941 B
C
#include "cache.h"
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int main(int ac, char **av)
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{
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git_SHA_CTX ctx;
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unsigned char sha1[20];
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unsigned bufsz = 8192;
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int binary = 0;
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char *buffer;
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if (ac == 2) {
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if (!strcmp(av[1], "-b"))
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binary = 1;
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else
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bufsz = strtoul(av[1], NULL, 10) * 1024 * 1024;
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}
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if (!bufsz)
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bufsz = 8192;
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while ((buffer = malloc(bufsz)) == NULL) {
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fprintf(stderr, "bufsz %u is too big, halving...\n", bufsz);
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bufsz /= 2;
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if (bufsz < 1024)
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die("OOPS");
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}
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git_SHA1_Init(&ctx);
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while (1) {
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ssize_t sz, this_sz;
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char *cp = buffer;
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unsigned room = bufsz;
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this_sz = 0;
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while (room) {
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sz = xread(0, cp, room);
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if (sz == 0)
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break;
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if (sz < 0)
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die_errno("test-sha1");
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this_sz += sz;
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cp += sz;
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room -= sz;
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}
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if (this_sz == 0)
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break;
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git_SHA1_Update(&ctx, buffer, this_sz);
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}
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git_SHA1_Final(sha1, &ctx);
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if (binary)
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fwrite(sha1, 1, 20, stdout);
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else
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puts(sha1_to_hex(sha1));
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exit(0);
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}
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