compat: Add simplified merge sort implementation from glibc

diff --git a/builtin-blame.c b/builtin-blame.c
index 16c0ca82063b35651cacc56b20ebd73c3526acfb..9b4c02e87f7ef4a20d269ab9315b6977cf7fb3fb 100644 (file)
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -125,11 +125,18 @@ static void origin_decref(struct origin *o)
        if (o && --o->refcnt <= 0) {
                if (o->file.ptr)
                        free(o->file.ptr);
-               memset(o, 0, sizeof(*o));
                free(o);
        }
 }
 
+static void drop_origin_blob(struct origin *o)
+{
+       if (o->file.ptr) {
+               free(o->file.ptr);
+               o->file.ptr = NULL;
+       }
+}
+
 /*
  * Each group of lines is described by a blame_entry; it can be split
  * as we pass blame to the parents.  They form a linked list in the
@@ -335,7 +342,7 @@ static struct origin *find_origin(struct scoreboard *sb,
         * same and diff-tree is fairly efficient about this.
         */
        diff_setup(&diff_opts);
-       diff_opts.recursive = 1;
+       DIFF_OPT_SET(&diff_opts, RECURSIVE);
        diff_opts.detect_rename = 0;
        diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
        paths[0] = origin->path;
@@ -380,6 +387,7 @@ static struct origin *find_origin(struct scoreboard *sb,
                }
        }
        diff_flush(&diff_opts);
+       diff_tree_release_paths(&diff_opts);
        if (porigin) {
                /*
                 * Create a freestanding copy that is not part of
@@ -409,7 +417,7 @@ static struct origin *find_rename(struct scoreboard *sb,
        const char *paths[2];
 
        diff_setup(&diff_opts);
-       diff_opts.recursive = 1;
+       DIFF_OPT_SET(&diff_opts, RECURSIVE);
        diff_opts.detect_rename = DIFF_DETECT_RENAME;
        diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
        diff_opts.single_follow = origin->path;
@@ -436,6 +444,7 @@ static struct origin *find_rename(struct scoreboard *sb,
                }
        }
        diff_flush(&diff_opts);
+       diff_tree_release_paths(&diff_opts);
        return porigin;
 }
 
@@ -532,7 +541,7 @@ static struct patch *compare_buffer(mmfile_t *file_p, mmfile_t *file_o,
        state.ret->chunks = NULL;
        state.ret->num = 0;
 
-       xdl_diff(file_p, file_o, &xpp, &xecfg, &ecb);
+       xdi_diff(file_p, file_o, &xpp, &xecfg, &ecb);
 
        if (state.ret->num) {
                struct chunk *chunk;
@@ -597,7 +606,7 @@ static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e)
 
 /*
  * src typically is on-stack; we want to copy the information in it to
- * an malloced blame_entry that is already on the linked list of the
+ * a malloced blame_entry that is already on the linked list of the
  * scoreboard.  The origin of dst loses a refcnt while the origin of src
  * gains one.
  */
@@ -1075,7 +1084,7 @@ static int find_copy_in_parent(struct scoreboard *sb,
                return 1; /* nothing remains for this target */
 
        diff_setup(&diff_opts);
-       diff_opts.recursive = 1;
+       DIFF_OPT_SET(&diff_opts, RECURSIVE);
        diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
 
        paths[0] = NULL;
@@ -1093,7 +1102,7 @@ static int find_copy_in_parent(struct scoreboard *sb,
        if ((opt & PICKAXE_BLAME_COPY_HARDEST)
            || ((opt & PICKAXE_BLAME_COPY_HARDER)
                && (!porigin || strcmp(target->path, porigin->path))))
-               diff_opts.find_copies_harder = 1;
+               DIFF_OPT_SET(&diff_opts, FIND_COPIES_HARDER);
 
        if (is_null_sha1(target->commit->object.sha1))
                do_diff_cache(parent->tree->object.sha1, &diff_opts);
@@ -1102,7 +1111,7 @@ static int find_copy_in_parent(struct scoreboard *sb,
                               target->commit->tree->object.sha1,
                               "", &diff_opts);
 
-       if (!diff_opts.find_copies_harder)
+       if (!DIFF_OPT_TST(&diff_opts, FIND_COPIES_HARDER))
                diffcore_std(&diff_opts);
 
        retval = 0;
@@ -1157,7 +1166,7 @@ static int find_copy_in_parent(struct scoreboard *sb,
                }
        }
        diff_flush(&diff_opts);
-
+       diff_tree_release_paths(&diff_opts);
        return retval;
 }
 
@@ -1274,8 +1283,13 @@ static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt)
                }
 
  finish:
-       for (i = 0; i < MAXPARENT; i++)
-               origin_decref(parent_origin[i]);
+       for (i = 0; i < MAXPARENT; i++) {
+               if (parent_origin[i]) {
+                       drop_origin_blob(parent_origin[i]);
+                       origin_decref(parent_origin[i]);
+               }
+       }
+       drop_origin_blob(origin);
 }
 
 /*
@@ -2002,7 +2016,6 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
        unsigned char head_sha1[20];
        struct strbuf buf;
        const char *ident;
-       int fd;
        time_t now;
        int size, len;
        struct cache_entry *ce;
@@ -2041,11 +2054,8 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
                mode = canon_mode(st.st_mode);
                switch (st.st_mode & S_IFMT) {
                case S_IFREG:
-                       fd = open(read_from, O_RDONLY);
-                       if (fd < 0)
-                               die("cannot open %s", read_from);
-                       if (strbuf_read(&buf, fd, 0) != xsize_t(st.st_size))
-                               die("cannot read %s", read_from);
+                       if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size)
+                               die("cannot open or read %s", read_from);
                        break;
                case S_IFLNK:
                        if (readlink(read_from, buf.buf, buf.alloc) != fin_size)
@@ -2063,6 +2073,7 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
                if (strbuf_read(&buf, 0, 0) < 0)
                        die("read error %s from stdin", strerror(errno));
        }
+       convert_to_git(path, buf.buf, buf.len, &buf);
        origin->file.ptr = buf.buf;
        origin->file.size = buf.len;
        pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1);
@@ -2218,9 +2229,6 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
                        argv[unk++] = arg;
        }
 
-       if (!incremental)
-               setup_pager();
-
        if (!blame_move_score)
                blame_move_score = BLAME_DEFAULT_MOVE_SCORE;
        if (!blame_copy_score)
@@ -2301,6 +2309,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
                        else if (i != argc - 1)
                                usage(blame_usage); /* garbage at end */
 
+                       setup_work_tree();
                        if (!has_path_in_work_tree(path))
                                die("cannot stat path %s: %s",
                                    path, strerror(errno));
@@ -2348,6 +2357,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
                 * do not default to HEAD, but use the working tree
                 * or "--contents".
                 */
+               setup_work_tree();
                sb.final = fake_working_tree_commit(path, contents_from);
                add_pending_object(&revs, &(sb.final->object), ":");
        }
@@ -2414,6 +2424,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 
        read_mailmap(&mailmap, ".mailmap", NULL);
 
+       if (!incremental)
+               setup_pager();
+
        assign_blame(&sb, &revs, opt);
 
        if (incremental)