Add corner case tests for diff-index and diff-files

diff --git a/combine-diff.c b/combine-diff.c
index 5a658dc0d54f91faee450e4f9ebacc1a6338478f..0e19cbaacc1099fd69f7f2d9b4a17c94a327baa9 100644 (file)
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -226,7 +226,7 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
        state.num_parent = num_parent;
        state.n = n;
 
-       xdl_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
+       xdi_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
        free(parent_file.ptr);
 
        /* Assign line numbers for this parent.
@@ -646,12 +646,19 @@ static void reuse_combine_diff(struct sline *sline, unsigned long cnt,
        sline->p_lno[i] = sline->p_lno[j];
 }
 
-static void dump_quoted_path(const char *prefix, const char *path,
+static void dump_quoted_path(const char *head,
+                            const char *prefix,
+                            const char *path,
                             const char *c_meta, const char *c_reset)
 {
-       printf("%s%s", c_meta, prefix);
-       quote_c_style(path, NULL, stdout, 0);
-       printf("%s\n", c_reset);
+       static struct strbuf buf = STRBUF_INIT;
+
+       strbuf_reset(&buf);
+       strbuf_addstr(&buf, c_meta);
+       strbuf_addstr(&buf, head);
+       quote_two_c_style(&buf, prefix, path, 0);
+       strbuf_addstr(&buf, c_reset);
+       puts(buf.buf);
 }
 
 static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
@@ -793,7 +800,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                if (rev->loginfo && !rev->no_commit_id)
                        show_log(rev, opt->msg_sep);
                dump_quoted_path(dense ? "diff --cc " : "diff --combined ",
-                                elem->path, c_meta, c_reset);
+                                "", elem->path, c_meta, c_reset);
                printf("%sindex ", c_meta);
                for (i = 0; i < num_parent; i++) {
                        abb = find_unique_abbrev(elem->parent[i].sha1,
@@ -829,14 +836,19 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                        printf("%s\n", c_reset);
                }
                if (added)
-                       dump_quoted_path("--- /dev/", "null", c_meta, c_reset);
+                       dump_quoted_path("--- ", "", "/dev/null",
+                                        c_meta, c_reset);
                else
-                       dump_quoted_path("--- a/", elem->path, c_meta, c_reset);
+                       dump_quoted_path("--- ", opt->a_prefix, elem->path,
+                                        c_meta, c_reset);
                if (deleted)
-                       dump_quoted_path("+++ /dev/", "null", c_meta, c_reset);
+                       dump_quoted_path("+++ ", "", "/dev/null",
+                                        c_meta, c_reset);
                else
-                       dump_quoted_path("+++ b/", elem->path, c_meta, c_reset);
-               dump_sline(sline, cnt, num_parent, DIFF_OPT_TST(opt, COLOR_DIFF));
+                       dump_quoted_path("+++ ", opt->b_prefix, elem->path,
+                                        c_meta, c_reset);
+               dump_sline(sline, cnt, num_parent,
+                          DIFF_OPT_TST(opt, COLOR_DIFF));
        }
        free(result);