X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=diff.c;h=9fa841010cc21bebc464926b15232b2aace0f5ba;hb=d9ac3e41c37ea565d8227d942b4f468616c9813a;hp=66408571abf91d6b90cd69d04164eafd633e407a;hpb=75618f1106b95defafca698d5cfdfd3dfb3a7e3c;p=git.git

diff --git a/diff.c b/diff.c
index 66408571a..9a8012e36 100644
--- a/diff.c
+++ b/diff.c
@@ -23,7 +23,7 @@
 #endif
 
 static int diff_detect_rename_default;
-static int diff_rename_limit_default = 200;
+static int diff_rename_limit_default = 400;
 static int diff_suppress_blank_empty;
 int diff_use_color_default = -1;
 static const char *diff_word_regex_cfg;
@@ -615,22 +615,20 @@ static void diff_words_append(char *line, unsigned long len,
 	buffer->text.ptr[buffer->text.size] = '\0';
 }
 
-struct diff_words_style_elem
-{
+struct diff_words_style_elem {
 	const char *prefix;
 	const char *suffix;
 	const char *color; /* NULL; filled in by the setup code if
 			    * color is enabled */
 };
 
-struct diff_words_style
-{
+struct diff_words_style {
 	enum diff_words_type type;
 	struct diff_words_style_elem new, old, ctx;
 	const char *newline;
 };
 
-struct diff_words_style diff_words_styles[] = {
+static struct diff_words_style diff_words_styles[] = {
 	{ DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" },
 	{ DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" },
 	{ DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" }
@@ -1052,8 +1050,16 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 			emit_line(ecbdata->opt, plain, reset, line, len);
 			fputs("~\n", ecbdata->opt->file);
 		} else {
-			/* don't print the prefix character */
-			emit_line(ecbdata->opt, plain, reset, line+1, len-1);
+			/*
+			 * Skip the prefix character, if any.  With
+			 * diff_suppress_blank_empty, there may be
+			 * none.
+			 */
+			if (line[0] != '\n') {
+			      line++;
+			      len--;
+			}
+			emit_line(ecbdata->opt, plain, reset, line, len);
 		}
 		return;
 	}
@@ -1244,7 +1250,7 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
 	uintmax_t max_change = 0, max_len = 0;
 	int total_files = data->nr;
 	int width, name_width;
-	const char *reset, *set, *add_c, *del_c;
+	const char *reset, *add_c, *del_c;
 	const char *line_prefix = "";
 	struct strbuf *msg = NULL;
 
@@ -1271,7 +1277,6 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
 
 	/* Find the longest filename and max number of changes */
 	reset = diff_get_color_opt(options, DIFF_RESET);
-	set   = diff_get_color_opt(options, DIFF_PLAIN);
 	add_c = diff_get_color_opt(options, DIFF_FILE_NEW);
 	del_c = diff_get_color_opt(options, DIFF_FILE_OLD);
 
@@ -1541,8 +1546,36 @@ static void show_dirstat(struct diff_options *options)
 		struct diff_filepair *p = q->queue[i];
 		const char *name;
 		unsigned long copied, added, damage;
+		int content_changed;
+
+		name = p->two->path ? p->two->path : p->one->path;
 
-		name = p->one->path ? p->one->path : p->two->path;
+		if (p->one->sha1_valid && p->two->sha1_valid)
+			content_changed = hashcmp(p->one->sha1, p->two->sha1);
+		else
+			content_changed = 1;
+
+		if (!content_changed) {
+			/*
+			 * The SHA1 has not changed, so pre-/post-content is
+			 * identical. We can therefore skip looking at the
+			 * file contents altogether.
+			 */
+			damage = 0;
+			goto found_damage;
+		}
+
+		if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) {
+			/*
+			 * In --dirstat-by-file mode, we don't really need to
+			 * look at the actual file contents at all.
+			 * The fact that the SHA1 changed is enough for us to
+			 * add this file to the list of results
+			 * (with each file contributing equal damage).
+			 */
+			damage = 1;
+			goto found_damage;
+		}
 
 		if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) {
 			diff_populate_filespec(p->one, 0);
@@ -1566,14 +1599,18 @@ static void show_dirstat(struct diff_options *options)
 		/*
 		 * Original minus copied is the removed material,
 		 * added is the new material.  They are both damages
-		 * made to the preimage. In --dirstat-by-file mode, count
-		 * damaged files, not damaged lines. This is done by
-		 * counting only a single damaged line per file.
+		 * made to the preimage.
+		 * If the resulting damage is zero, we know that
+		 * diffcore_count_changes() considers the two entries to
+		 * be identical, but since content_changed is true, we
+		 * know that there must have been _some_ kind of change,
+		 * so we force all entries to have damage > 0.
 		 */
 		damage = (p->one->size - copied) + added;
-		if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE) && damage > 0)
+		if (!damage)
 			damage = 1;
 
+found_damage:
 		ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc);
 		dir.files[dir.nr].name = name;
 		dir.files[dir.nr].changed = damage;
@@ -4352,20 +4389,20 @@ void diff_change(struct diff_options *options,
 		DIFF_OPT_SET(options, HAS_CHANGES);
 }
 
-void diff_unmerge(struct diff_options *options,
-		  const char *path,
-		  unsigned mode, const unsigned char *sha1)
+struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path)
 {
+	struct diff_filepair *pair;
 	struct diff_filespec *one, *two;
 
 	if (options->prefix &&
 	    strncmp(path, options->prefix, options->prefix_length))
-		return;
+		return NULL;
 
 	one = alloc_filespec(path);
 	two = alloc_filespec(path);
-	fill_filespec(one, sha1, mode);
-	diff_queue(&diff_queued_diff, one, two)->is_unmerged = 1;
+	pair = diff_queue(&diff_queued_diff, one, two);
+	pair->is_unmerged = 1;
+	return pair;
 }
 
 static char *run_textconv(const char *pgm, struct diff_filespec *spec,