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57 lines
975 B
57 lines
975 B
#include "test-tool.h" |
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#include "cache.h" |
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int cmd__sha1(int ac, const 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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