blob: 1ba0675c75f0d2dab281d054b577272cd45c39f9 [file] [log] [blame]
#include "test-tool.h"
#include "cache.h"
int cmd__sha1(int ac, const char **av)
{
git_SHA_CTX ctx;
unsigned char sha1[20];
unsigned bufsz = 8192;
int binary = 0;
char *buffer;
if (ac == 2) {
if (!strcmp(av[1], "-b"))
binary = 1;
else
bufsz = strtoul(av[1], NULL, 10) * 1024 * 1024;
}
if (!bufsz)
bufsz = 8192;
while ((buffer = malloc(bufsz)) == NULL) {
fprintf(stderr, "bufsz %u is too big, halving...\n", bufsz);
bufsz /= 2;
if (bufsz < 1024)
die("OOPS");
}
git_SHA1_Init(&ctx);
while (1) {
ssize_t sz, this_sz;
char *cp = buffer;
unsigned room = bufsz;
this_sz = 0;
while (room) {
sz = xread(0, cp, room);
if (sz == 0)
break;
if (sz < 0)
die_errno("test-sha1");
this_sz += sz;
cp += sz;
room -= sz;
}
if (this_sz == 0)
break;
git_SHA1_Update(&ctx, buffer, this_sz);
}
git_SHA1_Final(sha1, &ctx);
if (binary)
fwrite(sha1, 1, 20, stdout);
else
puts(sha1_to_hex(sha1));
exit(0);
}