tree-diff: allow diff_tree_sha1 to accept NULL sha1

diff --git a/diff.h b/diff.h
index 44092c2176468257644a19f787038a1ff3033eaa..ce123fa06fee6fb6e5e76d6a92ea8284a5bbbcf1 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -88,8 +88,9 @@ typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data)
 #define DIFF_OPT_PICKAXE_IGNORE_CASE (1 << 30)
 
 #define DIFF_OPT_TST(opts, flag)    ((opts)->flags & DIFF_OPT_##flag)
-#define DIFF_OPT_SET(opts, flag)    ((opts)->flags |= DIFF_OPT_##flag)
-#define DIFF_OPT_CLR(opts, flag)    ((opts)->flags &= ~DIFF_OPT_##flag)
+#define DIFF_OPT_TOUCHED(opts, flag)    ((opts)->touched_flags & DIFF_OPT_##flag)
+#define DIFF_OPT_SET(opts, flag)    (((opts)->flags |= DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
+#define DIFF_OPT_CLR(opts, flag)    (((opts)->flags &= ~DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
 #define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)
 #define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
 #define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)
@@ -109,6 +110,7 @@ struct diff_options {
        const char *single_follow;
        const char *a_prefix, *b_prefix;
        unsigned flags;
+       unsigned touched_flags;
 
        /* diff-filter bits */
        unsigned int filter;
@@ -149,6 +151,8 @@ struct diff_options {
        /* to support internal diff recursion by --follow hack*/
        int found_follow;
 
+       void (*set_default)(struct diff_options *);
+
        FILE *file;
        int close_file;
 
@@ -160,6 +164,8 @@ struct diff_options {
        diff_prefix_fn_t output_prefix;
        int output_prefix_length;
        void *output_prefix_data;
+
+       int diff_path_counter;
 };
 
 enum color_diff {
@@ -240,7 +246,7 @@ extern struct diff_filepair *diff_unmerge(struct diff_options *, const char *pat
 #define DIFF_SETUP_USE_SIZE_CACHE      4
 
 /*
- * Poor man's alternative to parse-option, to allow both sticked form
+ * Poor man's alternative to parse-option, to allow both stuck form
  * (--option=value) and separate form (--option value).
  */
 extern int parse_long_opt(const char *opt, const char **argv,
@@ -326,7 +332,7 @@ extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
 
 extern int diff_result_code(struct diff_options *, int);
 
-extern void diff_no_index(struct rev_info *, int, const char **, int, const char *);
+extern void diff_no_index(struct rev_info *, int, const char **, const char *);
 
 extern int index_differs_from(const char *def, int diff_flags);