Use strbuf API in buitin-rerere.c

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-rerere.c b/builtin-rerere.c
index 29d057c98cc255e718df540a62177101d9789abe..98d7702168c03b148b0029f4d8d2e7d161ca80cb 100644 (file)
--- a/builtin-rerere.c
+++ b/builtin-rerere.c
@@ -1,6 +1,7 @@
 #include "builtin.h"
 #include "cache.h"
 #include "path-list.h"
+#include "strbuf.h"
 #include "xdiff/xdiff.h"
 #include "xdiff-interface.h"
 
@@ -66,41 +67,20 @@ static int write_rr(struct path_list *rr, int out_fd)
        return commit_lock_file(&write_lock);
 }
 
-struct buffer {
-       char *ptr;
-       int nr, alloc;
-};
-
-static void append_line(struct buffer *buffer, const char *line)
-{
-       int len = strlen(line);
-
-       if (buffer->nr + len > buffer->alloc) {
-               buffer->alloc = alloc_nr(buffer->nr + len);
-               buffer->ptr = xrealloc(buffer->ptr, buffer->alloc);
-       }
-       memcpy(buffer->ptr + buffer->nr, line, len);
-       buffer->nr += len;
-}
-
-static void clear_buffer(struct buffer *buffer)
-{
-       free(buffer->ptr);
-       buffer->ptr = NULL;
-       buffer->nr = buffer->alloc = 0;
-}
-
 static int handle_file(const char *path,
         unsigned char *sha1, const char *output)
 {
        SHA_CTX ctx;
        char buf[1024];
        int hunk = 0, hunk_no = 0;
-       struct buffer minus = { NULL, 0, 0 }, plus = { NULL, 0, 0 };
-       struct buffer *one = &minus, *two = +
+       struct strbuf minus, plus;
+       struct strbuf *one = &minus, *two = +
        FILE *f = fopen(path, "r");
        FILE *out;
 
+       strbuf_init(&minus);
+       strbuf_init(&plus);
+
        if (!f)
                return error("Could not open %s", path);
 
@@ -122,36 +102,36 @@ static int handle_file(const char *path,
                else if (!prefixcmp(buf, "======="))
                        hunk = 2;
                else if (!prefixcmp(buf, ">>>>>>> ")) {
-                       int one_is_longer = (one->nr > two->nr);
-                       int common_len = one_is_longer ? two->nr : one->nr;
-                       int cmp = memcmp(one->ptr, two->ptr, common_len);
+                       int one_is_longer = (one->len > two->len);
+                       int common_len = one_is_longer ? two->len : one->len;
+                       int cmp = memcmp(one->buf, two->buf, common_len);
 
                        hunk_no++;
                        hunk = 0;
                        if ((cmp > 0) || ((cmp == 0) && one_is_longer)) {
-                               struct buffer *swap = one;
+                               struct strbuf *swap = one;
                                one = two;
                                two = swap;
                        }
                        if (out) {
                                fputs("<<<<<<<\n", out);
-                               fwrite(one->ptr, one->nr, 1, out);
+                               fwrite(one->buf, one->len, 1, out);
                                fputs("=======\n", out);
-                               fwrite(two->ptr, two->nr, 1, out);
+                               fwrite(two->buf, two->len, 1, out);
                                fputs(">>>>>>>\n", out);
                        }
                        if (sha1) {
-                               SHA1_Update(&ctx, one->ptr, one->nr);
+                               SHA1_Update(&ctx, one->buf, one->len);
                                SHA1_Update(&ctx, "\0", 1);
-                               SHA1_Update(&ctx, two->ptr, two->nr);
+                               SHA1_Update(&ctx, two->buf, two->len);
                                SHA1_Update(&ctx, "\0", 1);
                        }
-                       clear_buffer(one);
-                       clear_buffer(two);
+                       strbuf_release(one);
+                       strbuf_release(two);
                } else if (hunk == 1)
-                       append_line(one, buf);
+                       strbuf_addstr(one, buf);
                else if (hunk == 2)
-                       append_line(two, buf);
+                       strbuf_addstr(two, buf);
                else if (out)
                        fputs(buf, out);
        }