grep with unmerged index

diff --git a/sha1_file.c b/sha1_file.c
index aca741b79ce3cdc28f0eb5bdc6848ddba6da8f35..95b5a403d8d7e8c1657fc8d4c1a8efd15c6a4ca3 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -497,7 +497,7 @@ static int check_packed_git_idx(const char *path,  struct packed_git *p)
                 */
                if (idx_size != 4*256 + nr * 24 + 20 + 20) {
                        munmap(idx_map, idx_size);
-                       return error("wrong index file size in %s", path);
+                       return error("wrong index v1 file size in %s", path);
                }
        } else if (version == 2) {
                /*
@@ -519,15 +519,17 @@ static int check_packed_git_idx(const char *path,  struct packed_git *p)
                        max_size += (nr - 1)*8;
                if (idx_size < min_size || idx_size > max_size) {
                        munmap(idx_map, idx_size);
-                       return error("wrong index file size in %s", path);
+                       return error("wrong index v2 file size in %s", path);
                }
-               if (idx_size != min_size) {
-                       /* make sure we can deal with large pack offsets */
-                       off_t x = 0x7fffffffUL, y = 0xffffffffUL;
-                       if (x > (x + 1) || y > (y + 1)) {
-                               munmap(idx_map, idx_size);
-                               return error("pack too large for current definition of off_t in %s", path);
-                       }
+               if (idx_size != min_size &&
+                   /*
+                    * make sure we can deal with large pack offsets.
+                    * 31-bit signed offset won't be enough, neither
+                    * 32-bit unsigned one will be.
+                    */
+                   (sizeof(off_t) <= 4)) {
+                       munmap(idx_map, idx_size);
+                       return error("pack too large for current definition of off_t in %s", path);
                }
        }
 
@@ -1570,6 +1572,10 @@ static void *unpack_delta_entry(struct packed_git *p,
                    (uintmax_t)base_offset, p->pack_name);
 
        delta_data = unpack_compressed_entry(p, w_curs, curpos, delta_size);
+       if (!delta_data)
+               die("failed to unpack compressed delta"
+                   " at %"PRIuMAX" from %s",
+                   (uintmax_t)curpos, p->pack_name);
        result = patch_delta(base, base_size,
                             delta_data, delta_size,
                             sizep);