add strip_suffix function

diff --git a/cache.h b/cache.h
index 00ba6bf08eaf0b6f3dbbea709922a6cfce49c86d..cc46be4e0fb2e8cdc69e48386f8233354a348818 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -279,6 +279,7 @@ struct index_state {
                 initialized : 1;
        struct hashmap name_hash;
        struct hashmap dir_hash;
+       unsigned char sha1[20];
 };
 
 extern struct index_state the_index;
@@ -581,7 +582,17 @@ extern size_t packed_git_limit;
 extern size_t delta_base_cache_limit;
 extern unsigned long big_file_threshold;
 extern unsigned long pack_size_limit_cfg;
-extern int read_replace_refs;
+
+/*
+ * Do replace refs need to be checked this run?  This variable is
+ * initialized to true unless --no-replace-object is used or
+ * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
+ * commands that do not want replace references to be active.  As an
+ * optimization it is also set to false if replace references have
+ * been sought but there were none.
+ */
+extern int check_replace_refs;
+
 extern int fsync_object_files;
 extern int core_preload_index;
 extern int core_apply_sparse_checkout;
@@ -808,13 +819,26 @@ static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *
 {
        return read_sha1_file_extended(sha1, type, size, LOOKUP_REPLACE_OBJECT);
 }
+
+/*
+ * This internal function is only declared here for the benefit of
+ * lookup_replace_object().  Please do not call it directly.
+ */
 extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
+
+/*
+ * If object sha1 should be replaced, return the replacement object's
+ * name (replaced recursively, if necessary).  The return value is
+ * either sha1 or a pointer to a permanently-allocated value.  When
+ * object replacement is suppressed, always return sha1.
+ */
 static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)
 {
-       if (!read_replace_refs)
+       if (!check_replace_refs)
                return sha1;
        return do_lookup_replace_object(sha1);
 }
+
 static inline const unsigned char *lookup_replace_object_extended(const unsigned char *sha1, unsigned flag)
 {
        if (!(flag & LOOKUP_REPLACE_OBJECT))
@@ -1299,6 +1323,8 @@ extern void fsync_or_die(int fd, const char *);
 
 extern ssize_t read_in_full(int fd, void *buf, size_t count);
 extern ssize_t write_in_full(int fd, const void *buf, size_t count);
+extern ssize_t pread_in_full(int fd, void *buf, size_t count, off_t offset);
+
 static inline ssize_t write_str_in_full(int fd, const char *str)
 {
        return write_in_full(fd, str, strlen(str));
@@ -1435,4 +1461,6 @@ int stat_validity_check(struct stat_validity *sv, const char *path);
  */
 void stat_validity_update(struct stat_validity *sv, int fd);
 
+int versioncmp(const char *s1, const char *s2);
+
 #endif /* CACHE_H */