Introduce usagef() that takes a printf-style format

diff --git a/pack-check.c b/pack-check.c
index 90c33b1b84ef793bf017927026863de41e31fa2c..166ca703c10face0d4961da6ceee7a149ebcfac4 100644 (file)
--- a/pack-check.c
+++ b/pack-check.c
@@ -49,7 +49,7 @@ static int verify_packfile(struct packed_git *p,
        const unsigned char *index_base = p->index_data;
        git_SHA_CTX ctx;
        unsigned char sha1[20], *pack_sig;
-       off_t offset = 0, pack_sig_ofs = p->pack_size - 20;
+       off_t offset = 0, pack_sig_ofs = 0;
        uint32_t nr_objects, i;
        int err = 0;
        struct idx_entry *entries;
@@ -61,14 +61,16 @@ static int verify_packfile(struct packed_git *p,
         */
 
        git_SHA1_Init(&ctx);
-       while (offset < pack_sig_ofs) {
+       do {
                unsigned int remaining;
                unsigned char *in = use_pack(p, w_curs, offset, &remaining);
                offset += remaining;
+               if (!pack_sig_ofs)
+                       pack_sig_ofs = p->pack_size - 20;
                if (offset > pack_sig_ofs)
                        remaining -= (unsigned int)(offset - pack_sig_ofs);
                git_SHA1_Update(&ctx, in, remaining);
-       }
+       } while (offset < pack_sig_ofs);
        git_SHA1_Final(sha1, &ctx);
        pack_sig = use_pack(p, w_curs, pack_sig_ofs, NULL);
        if (hashcmp(sha1, pack_sig))