Finally implement "git log --follow"

diff --git a/cache.h b/cache.h
index 5e7381eb1ea5f5fa8f4e70b15bc50f45ca616d39..ed83d92c5a2735b2b7f8a7fc06276acbf0df8b18 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -225,6 +225,24 @@ extern void verify_non_filename(const char *prefix, const char *name);
 
 #define alloc_nr(x) (((x)+16)*3/2)
 
+/*
+ * Realloc the buffer pointed at by variable 'x' so that it can hold
+ * at least 'nr' entries; the number of entries currently allocated
+ * is 'alloc', using the standard growing factor alloc_nr() macro.
+ *
+ * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
+ */
+#define ALLOC_GROW(x, nr, alloc) \
+       do { \
+               if ((nr) > alloc) { \
+                       if (alloc_nr(alloc) < (nr)) \
+                               alloc = (nr); \
+                       else \
+                               alloc = alloc_nr(alloc); \
+                       x = xrealloc((x), alloc * sizeof(*(x))); \
+               } \
+       } while(0)
+
 /* Initialize and use the cache information */
 extern int read_index(struct index_state *);
 extern int read_index_from(struct index_state *, const char *path);
@@ -354,7 +372,6 @@ extern int move_temp_to_file(const char *tmpfile, const char *filename);
 
 extern int has_sha1_pack(const unsigned char *sha1, const char **ignore);
 extern int has_sha1_file(const unsigned char *sha1);
-extern void *map_sha1_file(const unsigned char *sha1, unsigned long *);
 
 extern int has_pack_file(const unsigned char *sha1);
 extern int has_pack_index(const unsigned char *sha1);