58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
#include "test-tool.h"
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#include "cache.h"
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int cmd_hash_impl(int ac, const char **av, int algo)
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{
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git_hash_ctx ctx;
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unsigned char hash[GIT_MAX_HEXSZ];
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unsigned bufsz = 8192;
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int binary = 0;
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char *buffer;
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const struct git_hash_algo *algop = &hash_algos[algo];
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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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algop->init_fn(&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-hash");
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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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algop->update_fn(&ctx, buffer, this_sz);
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}
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algop->final_fn(hash, &ctx);
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if (binary)
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fwrite(hash, 1, algop->rawsz, stdout);
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else
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puts(hash_to_hex_algop(hash, algop));
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exit(0);
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}
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