[PATCH] Introduce diff_free_filepair() funcion.

This introduces a new function to free a common data structure,
and plugs some leaks.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff.c

@@ -521,6 +521,13 @@ struct diff_filepair *diff_queue(struct diff_queue_struct *queue,
 	return dp;
 }
 
+void diff_free_filepair(struct diff_filepair *p)
+{
+	diff_free_filespec_data(p->one);
+	diff_free_filespec_data(p->two);
+	free(p);
+}
+
 static void diff_flush_raw(struct diff_filepair *p,
 			   int line_termination,
 			   int inter_name_termination)
@@ -817,12 +824,8 @@ void diff_flush(int diff_output_style, int resolve_rename_copy)
 			break;
 		}
 	}
-	for (i = 0; i < q->nr; i++) {
-		struct diff_filepair *p = q->queue[i];
-		diff_free_filespec_data(p->one);
-		diff_free_filespec_data(p->two);
-		free(p);
-	}
+	for (i = 0; i < q->nr; i++)
+		diff_free_filepair(q->queue[i]);
 	free(q->queue);
 	q->queue = NULL;
 	q->nr = q->alloc = 0;

diffcore-pathspec.c

@@ -59,7 +59,7 @@ void diffcore_pathspec(const char **pathspec)
 		    matches_pathspec(p->two->path, spec, speccnt))
 			diff_q(&outq, p);
 		else
-			free(p);
+			diff_free_filepair(p);
 	}
 	free(q->queue);
 	*q = outq;

diffcore-pickaxe.c

@@ -49,7 +49,7 @@ void diffcore_pickaxe(const char *needle)
 			 contains(p->two, needle, len))
 			diff_q(&outq, p);
 		if (onum == outq.nr)
-			free(p);
+			diff_free_filepair(p);
 	}
 	free(q->queue);
 	*q = outq;

diffcore-rename.c

@@ -361,11 +361,8 @@ void diffcore_rename(int detect_rename, int minimum_score)
 			else
 				pair_to_free = p;
 		}
-		if (pair_to_free) {
-			diff_free_filespec_data(pair_to_free->one);
-			diff_free_filespec_data(pair_to_free->two);
-			free(pair_to_free);
-		}
+		if (pair_to_free)
+			diff_free_filepair(pair_to_free);
 	}
 	diff_debug_queue("done copying original", &outq);
 

diffcore.h

@@ -54,6 +54,8 @@ struct diff_filepair {
 	(S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
 	S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
 
+extern void diff_free_filepair(struct diff_filepair *);
+
 extern int diff_unmodified_pair(struct diff_filepair *);
 
 struct diff_queue_struct {