X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=diff.c;h=4cc41f097dfe1ade230d2d6e438b0249dfbc1a76;hb=3a663fd9842aaa9e232ab43a811d11f1d7f0b7bc;hp=9905cdb0122afecc282273c0e728c3f3b75fc51d;hpb=be3cfa85f45e32722a65349d023667be906a66b6;p=git.git

diff --git a/diff.c b/diff.c
index 9905cdb0..4cc41f09 100644
--- a/diff.c
+++ b/diff.c
@@ -59,8 +59,7 @@ static char *sq_expand(const char *src)
 		if (*cp == '\'')
 			cnt += 3;
 
-	if (! (buf = malloc(cnt)))
-	    return buf;
+	buf = xmalloc(cnt);
 	bp = buf;
 	while ((c = *src++)) {
 		if (c != '\'')
@@ -100,7 +99,7 @@ static void builtin_diff(const char *name,
 			strlen(diff_arg) +
 			strlen(name_1_sq) + strlen(name_2_sq)
 			- 5);
-	char *cmd = malloc(cmd_size);
+	char *cmd = xmalloc(cmd_size);
 	int next_at = 0;
 
 	next_at += snprintf(cmd+next_at, cmd_size-next_at,
@@ -195,13 +194,15 @@ void run_external_diff(const char *name,
 	int pid, status;
 	static int atexit_asked = 0;
 
-	prepare_temp_file(name, &temp[0], one);
-	prepare_temp_file(name, &temp[1], two);
-	if (! atexit_asked &&
-	    (temp[0].name == temp[0].tmp_path ||
-	     temp[1].name == temp[1].tmp_path)) {
-		atexit_asked = 1;
-		atexit(remove_tempfile);
+	if (one && two) {
+		prepare_temp_file(name, &temp[0], one);
+		prepare_temp_file(name, &temp[1], two);
+		if (! atexit_asked &&
+		    (temp[0].name == temp[0].tmp_path ||
+		     temp[1].name == temp[1].tmp_path)) {
+			atexit_asked = 1;
+			atexit(remove_tempfile);
+		}
 	}
 
 	fflush(NULL);
@@ -210,16 +211,23 @@ void run_external_diff(const char *name,
 		die("unable to fork");
 	if (!pid) {
 		const char *pgm = external_diff();
-		if (pgm)
-			execlp(pgm, pgm,
-			       name,
-			       temp[0].name, temp[0].hex, temp[0].mode,
-			       temp[1].name, temp[1].hex, temp[1].mode,
-			       NULL);
+		if (pgm) {
+			if (one && two)
+				execlp(pgm, pgm,
+				       name,
+				       temp[0].name, temp[0].hex, temp[0].mode,
+				       temp[1].name, temp[1].hex, temp[1].mode,
+				       NULL);
+			else
+				execlp(pgm, pgm, name, NULL);
+		}
 		/*
 		 * otherwise we use the built-in one.
 		 */
-		builtin_diff(name, temp);
+		if (one && two)
+			builtin_diff(name, temp);
+		else
+			printf("* Unmerged path %s\n", name);
 		exit(0);
 	}
 	if (waitpid(pid, &status, 0) < 0 || !WIFEXITED(status))
@@ -228,41 +236,53 @@ void run_external_diff(const char *name,
 	remove_tempfile();
 }
 
-void show_diff_empty(const struct cache_entry *ce, int reverse)
+void diff_addremove(int addremove, unsigned mode,
+		    const unsigned char *sha1,
+		    const char *base, const char *path)
 {
+	char concatpath[PATH_MAX];
 	struct diff_spec spec[2], *one, *two;
 
-	memcpy(spec[0].u.sha1, ce->sha1, 20);
-	spec[0].mode = ntohl(ce->ce_mode);
+	memcpy(spec[0].u.sha1, sha1, 20);
+	spec[0].mode = mode;
 	spec[0].sha1_valid = spec[0].file_valid = 1;
 	spec[1].file_valid = 0;
 
-	if (reverse) {
+	if (addremove == '+') {
 		one = spec + 1; two = spec;
 	} else {
 		one = spec; two = one + 1;
 	}
-
-	run_external_diff(ce->name, one, two);
+	
+	if (path) {
+		strcpy(concatpath, base);
+		strcat(concatpath, path);
+	}
+	run_external_diff(path ? concatpath : base, one, two);
 }
 
-void show_differences(const struct cache_entry *ce, int reverse) 
-{
-	struct diff_spec spec[2], *one, *two;
-
-	memcpy(spec[0].u.sha1, ce->sha1, 20);
-	spec[0].mode = ntohl(ce->ce_mode);
+void diff_change(unsigned old_mode, unsigned new_mode,
+		 const unsigned char *old_sha1,
+		 const unsigned char *new_sha1,
+		 const char *base, const char *path) {
+	char concatpath[PATH_MAX];
+	struct diff_spec spec[2];
+
+	memcpy(spec[0].u.sha1, old_sha1, 20);
+	spec[0].mode = old_mode;
+	memcpy(spec[1].u.sha1, new_sha1, 20);
+	spec[1].mode = new_mode;
 	spec[0].sha1_valid = spec[0].file_valid = 1;
+	spec[1].sha1_valid = spec[1].file_valid = 1;
 
-	spec[1].u.name = ce->name; /* the name we stated */
-	spec[1].sha1_valid = 0;
-	spec[1].file_valid = 1;
-
-	if (reverse) {
-		one = spec + 1; two = spec;
-	} else {
-		one = spec; two = one + 1;
+	if (path) {
+		strcpy(concatpath, base);
+		strcat(concatpath, path);
 	}
+	run_external_diff(path ? concatpath : base, &spec[0], &spec[1]);
+}
 
-	run_external_diff(ce->name, one, two);
+void diff_unmerge(const char *path)
+{
+	run_external_diff(path, NULL, NULL);
 }