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-rw-r--r--t/helper/test-hash.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/t/helper/test-hash.c b/t/helper/test-hash.c
new file mode 100644
index 0000000..0a31de6
--- /dev/null
+++ b/t/helper/test-hash.c
@@ -0,0 +1,58 @@
+#include "test-tool.h"
+#include "cache.h"
+
+int cmd_hash_impl(int ac, const char **av, int algo)
+{
+ git_hash_ctx ctx;
+ unsigned char hash[GIT_MAX_HEXSZ];
+ unsigned bufsz = 8192;
+ int binary = 0;
+ char *buffer;
+ const struct git_hash_algo *algop = &hash_algos[algo];
+
+ 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");
+ }
+
+ algop->init_fn(&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-hash");
+ this_sz += sz;
+ cp += sz;
+ room -= sz;
+ }
+ if (this_sz == 0)
+ break;
+ algop->update_fn(&ctx, buffer, this_sz);
+ }
+ algop->final_fn(hash, &ctx);
+
+ if (binary)
+ fwrite(hash, 1, algop->rawsz, stdout);
+ else
+ puts(hash_to_hex_algop(hash, algop));
+ exit(0);
+}