[PATCH 12/26] diff.c: emit_diff_symbol learns DIFF_SYMBOL_HEADER

[Stefan Beller <sbeller@xxxxxxxxxx>]

Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---
 diff.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/diff.c b/diff.c
index 7c56150b56..95f11ea86f 100644
--- a/diff.c
+++ b/diff.c
@@ -571,6 +571,7 @@ enum diff_symbol {
 	DIFF_SYMBOL_WORDS_PORCELAIN,
 	DIFF_SYMBOL_WORDS,
 	DIFF_SYMBOL_FILEPAIR,
+	DIFF_SYMBOL_HEADER,
 };
 /*
  * Flags for content lines:
@@ -685,6 +686,9 @@ static void emit_diff_symbol(struct diff_options *o, enum diff_symbol s,
 			line, reset,
 			strchr(line, ' ') ? "\t" : "");
 		break;
+	case DIFF_SYMBOL_HEADER:
+		fprintf(o->file, "%s", line);
+		break;
 	default:
 		die("BUG: unknown diff symbol");
 	}
@@ -1380,7 +1384,8 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 	o->found_changes = 1;
 
 	if (ecbdata->header) {
-		fprintf(o->file, "%s", ecbdata->header->buf);
+		emit_diff_symbol(o, DIFF_SYMBOL_HEADER,
+				 ecbdata->header->buf, ecbdata->header->len, 0);
 		strbuf_reset(ecbdata->header);
 		ecbdata->header = NULL;
 	}
@@ -2514,7 +2519,8 @@ static void builtin_diff(const char *name_a,
 		if (complete_rewrite &&
 		    (textconv_one || !diff_filespec_is_binary(one)) &&
 		    (textconv_two || !diff_filespec_is_binary(two))) {
-			fprintf(o->file, "%s", header.buf);
+			emit_diff_symbol(o, DIFF_SYMBOL_HEADER,
+					 header.buf, header.len, 0);
 			strbuf_reset(&header);
 			emit_rewrite_diff(name_a, name_b, one, two,
 						textconv_one, textconv_two, o);
@@ -2524,7 +2530,8 @@ static void builtin_diff(const char *name_a,
 	}
 
 	if (o->irreversible_delete && lbl[1][0] == '/') {
-		fprintf(o->file, "%s", header.buf);
+		emit_diff_symbol(o, DIFF_SYMBOL_HEADER, header.buf,
+				 header.len, 0);
 		strbuf_reset(&header);
 		goto free_ab_and_return;
 	} else if (!DIFF_OPT_TST(o, TEXT) &&
@@ -2535,10 +2542,13 @@ static void builtin_diff(const char *name_a,
 		    !DIFF_OPT_TST(o, BINARY)) {
 			if (!oidcmp(&one->oid, &two->oid)) {
 				if (must_show_header)
-					fprintf(o->file, "%s", header.buf);
+					emit_diff_symbol(o, DIFF_SYMBOL_HEADER,
+							 header.buf, header.len,
+							 0);
 				goto free_ab_and_return;
 			}
-			fprintf(o->file, "%s", header.buf);
+			emit_diff_symbol(o, DIFF_SYMBOL_HEADER,
+					 header.buf, header.len, 0);
 			fprintf(o->file, "%sBinary files %s and %s differ\n",
 				line_prefix, lbl[0], lbl[1]);
 			goto free_ab_and_return;
@@ -2549,10 +2559,11 @@ static void builtin_diff(const char *name_a,
 		if (mf1.size == mf2.size &&
 		    !memcmp(mf1.ptr, mf2.ptr, mf1.size)) {
 			if (must_show_header)
-				fprintf(o->file, "%s", header.buf);
+				emit_diff_symbol(o, DIFF_SYMBOL_HEADER,
+						 header.buf, header.len, 0);
 			goto free_ab_and_return;
 		}
-		fprintf(o->file, "%s", header.buf);
+		emit_diff_symbol(o, DIFF_SYMBOL_HEADER, header.buf, header.len, 0);
 		strbuf_reset(&header);
 		if (DIFF_OPT_TST(o, BINARY))
 			emit_binary_diff(o->file, &mf1, &mf2, line_prefix);
@@ -2570,7 +2581,8 @@ static void builtin_diff(const char *name_a,
 		const struct userdiff_funcname *pe;
 
 		if (must_show_header) {
-			fprintf(o->file, "%s", header.buf);
+			emit_diff_symbol(o, DIFF_SYMBOL_HEADER,
+					 header.buf, header.len, 0);
 			strbuf_reset(&header);
 		}
 
-- 
2.12.2.575.gb14f27f917