Update diff to use iterators

This is a major reorganization of the diff code.  This changes
the diff functions to use the iterators for traversing the
content.  This allowed a lot of code to be simplified.  Also,
this moved the functions relating to outputting a diff into a
new file (diff_output.c).

This includes a number of other changes - adding utility
functions, extending iterators, etc. plus more tests for the
diff code.  This also takes the example diff.c program much
further in terms of emulating git-diff command line options.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/path.h b/src/path.h
index abe6c2217..981fdd6a4 100644
--- a/src/path.h
+++ b/src/path.h
@@ -246,4 +246,26 @@ extern int git_path_dirload(
 	size_t alloc_extra,
 	git_vector *contents);
 
+
+typedef struct {
+	struct stat st;
+	size_t      path_len;
+	char        path[GIT_FLEX_ARRAY];
+} git_path_with_stat;
+
+extern int git_path_with_stat_cmp(const void *a, const void *b);
+
+/**
+ * Load all directory entries along with stat info into a vector.
+ *
+ * This is just like git_path_dirload except that each entry in the
+ * vector is a git_path_with_stat structure that contains both the
+ * path and the stat info, plus directories will have a / suffixed
+ * to their path name.
+ */
+extern int git_path_dirload_with_stat(
+	const char *path,
+	size_t prefix_len,
+	git_vector *contents);
+
 #endif