Add shared diff-handling functions

This adds a standard interface for tree diffing.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/cgit.h b/cgit.h
index b7f8827..24b02d7 100644
--- a/cgit.h
+++ b/cgit.h
@@ -16,12 +16,13 @@
 #include <log-tree.h>
 #include <archive.h>
 #include <xdiff/xdiff.h>
 
 
 typedef void (*configfn)(const char *name, const char *value);
+typedef void (*filepair_fn)(struct diff_filepair *pair);
 
 struct cacheitem {
 	char *name;
 	struct stat st;
 	int ttl;
 	int fd;
@@ -113,12 +114,16 @@ extern void cgit_querystring_cb(const char *name, const char *value);
 extern int chk_zero(int result, char *msg);
 extern int chk_positive(int result, char *msg);
 
 extern int hextoint(char c);
 
 extern void *cgit_free_commitinfo(struct commitinfo *info);
+extern void cgit_diff_tree(const unsigned char *old_sha1,
+			   const unsigned char *new_sha1,
+			   filepair_fn fn);
+extern void cgit_diff_commit(struct commit *commit, filepair_fn fn);
 
 extern char *fmt(const char *format,...);
 
 extern void html(const char *txt);
 extern void htmlf(const char *format,...);
 extern void html_txt(char *txt);