diff.c: emit_diff_symbol learns about DIFF_SYMBOL_SUMMARY

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff.c

@@ -572,6 +572,7 @@ enum diff_symbol {
 	DIFF_SYMBOL_STATS_LINE,
 	DIFF_SYMBOL_WORD_DIFF,
 	DIFF_SYMBOL_STAT_SEP,
+	DIFF_SYMBOL_SUMMARY,
 	DIFF_SYMBOL_SUBMODULE_ADD,
 	DIFF_SYMBOL_SUBMODULE_DEL,
 	DIFF_SYMBOL_SUBMODULE_UNTRACKED,
@@ -648,6 +649,7 @@ static void emit_diff_symbol(struct diff_options *o, enum diff_symbol s,
 	case DIFF_SYMBOL_SUBMODULE_ERROR:
 	case DIFF_SYMBOL_SUBMODULE_PIPETHROUGH:
 	case DIFF_SYMBOL_STATS_SUMMARY_INSERTS_DELETES:
+	case DIFF_SYMBOL_SUMMARY:
 	case DIFF_SYMBOL_STATS_LINE:
 	case DIFF_SYMBOL_BINARY_DIFF_BODY:
 	case DIFF_SYMBOL_CONTEXT_FRAGINFO:
@@ -4717,67 +4719,76 @@ static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt)
 	}
 }
 
-static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs)
+static void show_file_mode_name(struct diff_options *opt, const char *newdelete, struct diff_filespec *fs)
 {
+	struct strbuf sb = STRBUF_INIT;
 	if (fs->mode)
-		fprintf(file, " %s mode %06o ", newdelete, fs->mode);
+		strbuf_addf(&sb, " %s mode %06o ", newdelete, fs->mode);
 	else
-		fprintf(file, " %s ", newdelete);
-	write_name_quoted(fs->path, file, '\n');
+		strbuf_addf(&sb, " %s ", newdelete);
+
+	quote_c_style(fs->path, &sb, NULL, 0);
+	strbuf_addch(&sb, '\n');
+	emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY,
+			 sb.buf, sb.len, 0);
+	strbuf_release(&sb);
 }
 
-
-static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name,
-		const char *line_prefix)
+static void show_mode_change(struct diff_options *opt, struct diff_filepair *p,
+		int show_name)
 {
 	if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) {
-		fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode,
-			p->two->mode, show_name ? ' ' : '\n');
+		struct strbuf sb = STRBUF_INIT;
+		strbuf_addf(&sb, " mode change %06o => %06o",
+			    p->one->mode, p->two->mode);
 		if (show_name) {
-			write_name_quoted(p->two->path, file, '\n');
+			strbuf_addch(&sb, ' ');
+			quote_c_style(p->two->path, &sb, NULL, 0);
 		}
+		emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY,
+				 sb.buf, sb.len, 0);
+		strbuf_release(&sb);
 	}
 }
 
-static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p,
-			const char *line_prefix)
+static void show_rename_copy(struct diff_options *opt, const char *renamecopy,
+		struct diff_filepair *p)
 {
+	struct strbuf sb = STRBUF_INIT;
 	char *names = pprint_rename(p->one->path, p->two->path);
-
-	fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p));
+	strbuf_addf(&sb, " %s %s (%d%%)\n",
+			renamecopy, names, similarity_index(p));
 	free(names);
-	show_mode_change(file, p, 0, line_prefix);
+	emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY,
+				 sb.buf, sb.len, 0);
+	show_mode_change(opt, p, 0);
 }
 
 static void diff_summary(struct diff_options *opt, struct diff_filepair *p)
 {
-	FILE *file = opt->file;
-	const char *line_prefix = diff_line_prefix(opt);
-
 	switch(p->status) {
 	case DIFF_STATUS_DELETED:
-		fputs(line_prefix, file);
-		show_file_mode_name(file, "delete", p->one);
+		show_file_mode_name(opt, "delete", p->one);
 		break;
 	case DIFF_STATUS_ADDED:
-		fputs(line_prefix, file);
-		show_file_mode_name(file, "create", p->two);
+		show_file_mode_name(opt, "create", p->two);
 		break;
 	case DIFF_STATUS_COPIED:
-		fputs(line_prefix, file);
-		show_rename_copy(file, "copy", p, line_prefix);
+		show_rename_copy(opt, "copy", p);
 		break;
 	case DIFF_STATUS_RENAMED:
-		fputs(line_prefix, file);
-		show_rename_copy(file, "rename", p, line_prefix);
+		show_rename_copy(opt, "rename", p);
 		break;
 	default:
 		if (p->score) {
-			fprintf(file, "%s rewrite ", line_prefix);
-			write_name_quoted(p->two->path, file, ' ');
-			fprintf(file, "(%d%%)\n", similarity_index(p));
+			struct strbuf sb = STRBUF_INIT;
+			strbuf_addstr(&sb, " rewrite ");
+			quote_c_style(p->two->path, &sb, NULL, 0);
+			strbuf_addf(&sb, " (%d%%)\n", similarity_index(p));
+			emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY,
+					 sb.buf, sb.len, 0);
 		}
-		show_mode_change(file, p, !p->score, line_prefix);
+		show_mode_change(opt, p, !p->score);
 		break;
 	}
 }