Lazily open pack index files on demand

[thirdparty/git.git] / pack-check.c

diff --git a/pack-check.c b/pack-check.c
index 299c514128b8b6330561a1a2b8ac30324a7ac479..3623c716e3e3b7d4a28800e34afd0e5f0e13a43d 100644 (file)
--- a/pack-check.c
+++ b/pack-check.c
@@ -5,7 +5,7 @@ static int verify_packfile(struct packed_git *p,
                struct pack_window **w_curs)
 {
        off_t index_size = p->index_size;
-       void *index_base = p->index_base;
+       const unsigned char *index_base = p->index_data;
        SHA_CTX ctx;
        unsigned char sha1[20];
        off_t offset = 0, pack_sig = p->pack_size - 20;
@@ -31,7 +31,7 @@ static int verify_packfile(struct packed_git *p,
        if (hashcmp(sha1, use_pack(p, w_curs, pack_sig, NULL)))
                return error("Packfile %s SHA1 mismatch with itself",
                             p->pack_name);
-       if (hashcmp(sha1, (unsigned char *)index_base + index_size - 40))
+       if (hashcmp(sha1, index_base + index_size - 40))
                return error("Packfile %s SHA1 mismatch with idx",
                             p->pack_name);
        unuse_pack(w_curs);
@@ -40,15 +40,16 @@ static int verify_packfile(struct packed_git *p,
         * have verified that nr_objects matches between idx and pack,
         * we do not do scan-streaming check on the pack file.
         */
-       nr_objects = num_packed_objects(p);
+       nr_objects = p->num_objects;
        for (i = 0, err = 0; i < nr_objects; i++) {
-               unsigned char sha1[20];
+               const unsigned char *sha1;
                void *data;
                enum object_type type;
                unsigned long size;
                off_t offset;
 
-               if (nth_packed_object_sha1(p, i, sha1))
+               sha1 = nth_packed_object_sha1(p, i);
+               if (!sha1)
                        die("internal error pack-check nth-packed-object");
                offset = find_pack_entry_one(sha1, p);
                if (!offset)
@@ -72,24 +73,25 @@ static int verify_packfile(struct packed_git *p,
 }
 
 
-#define MAX_CHAIN 40
+#define MAX_CHAIN 50
 
 static void show_pack_info(struct packed_git *p)
 {
-       uint32_t nr_objects, i, chain_histogram[MAX_CHAIN];
-
-       nr_objects = num_packed_objects(p);
+       uint32_t nr_objects, i, chain_histogram[MAX_CHAIN+1];
+       nr_objects = p->num_objects;
        memset(chain_histogram, 0, sizeof(chain_histogram));
 
        for (i = 0; i < nr_objects; i++) {
-               unsigned char sha1[20], base_sha1[20];
+               const unsigned char *sha1;
+               unsigned char base_sha1[20];
                const char *type;
                unsigned long size;
                unsigned long store_size;
                off_t offset;
                unsigned int delta_chain_length;
 
-               if (nth_packed_object_sha1(p, i, sha1))
+               sha1 = nth_packed_object_sha1(p, i);
+               if (!sha1)
                        die("internal error pack-check nth-packed-object");
                offset = find_pack_entry_one(sha1, p);
                if (!offset)
@@ -106,38 +108,43 @@ static void show_pack_info(struct packed_git *p)
                        printf("%-6s %lu %"PRIuMAX" %u %s\n",
                               type, size, (uintmax_t)offset,
                               delta_chain_length, sha1_to_hex(base_sha1));
-                       if (delta_chain_length < MAX_CHAIN)
+                       if (delta_chain_length <= MAX_CHAIN)
                                chain_histogram[delta_chain_length]++;
                        else
                                chain_histogram[0]++;
                }
        }
 
-       for (i = 0; i < MAX_CHAIN; i++) {
+       for (i = 0; i <= MAX_CHAIN; i++) {
                if (!chain_histogram[i])
                        continue;
-               printf("chain length %s %d: %d object%s\n",
-                      i ? "=" : ">=",
-                      i ? i : MAX_CHAIN,
-                      chain_histogram[i],
-                      1 < chain_histogram[i] ? "s" : "");
+               printf("chain length = %d: %d object%s\n", i,
+                      chain_histogram[i], chain_histogram[i] > 1 ? "s" : "");
        }
+       if (chain_histogram[0])
+               printf("chain length > %d: %d object%s\n", MAX_CHAIN,
+                      chain_histogram[0], chain_histogram[0] > 1 ? "s" : "");
 }
 
 int verify_pack(struct packed_git *p, int verbose)
 {
-       off_t index_size = p->index_size;
-       void *index_base = p->index_base;
+       off_t index_size;
+       const unsigned char *index_base;
        SHA_CTX ctx;
        unsigned char sha1[20];
        int ret;
 
+       if (open_pack_index(p))
+               return error("packfile %s index not opened", p->pack_name);
+       index_size = p->index_size;
+       index_base = p->index_data;
+
        ret = 0;
        /* Verify SHA1 sum of the index file */
        SHA1_Init(&ctx);
        SHA1_Update(&ctx, index_base, (unsigned int)(index_size - 20));
        SHA1_Final(sha1, &ctx);
-       if (hashcmp(sha1, (unsigned char *)index_base + index_size - 20))
+       if (hashcmp(sha1, index_base + index_size - 20))
                ret = error("Packfile index for %s SHA1 mismatch",
                            p->pack_name);