check_and_emit_line(): rename and refactor

The function name was too bland and not explicit enough as to what it is
checking.  Split it into two, and call the one that checks if there is a
whitespace breakage "ws_check()", and call the other one that checks and
emits the line after color coding "ws_check_emit()".

Signed-off-by: Junio C Hamano <gitster@pobox.com>

4 files changed, 25 insertions, 16 deletions

diff --git a/builtin-apply.c b/builtin-apply.c
index c497889312..92f00471bb 100644
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -979,8 +979,7 @@ static int find_header(char *line, unsigned long size, int *hdrsize, struct patc
 static void check_whitespace(const char *line, int len, unsigned ws_rule)
 {
 	char *err;
-	unsigned result = check_and_emit_line(line + 1, len - 1, ws_rule,
-	    NULL, NULL, NULL, NULL);
+	unsigned result = ws_check(line + 1, len - 1, ws_rule);
 	if (!result)
 		return;
 
@@ -991,7 +990,7 @@ static void check_whitespace(const char *line, int len, unsigned ws_rule)
 	else {
 		err = whitespace_error_string(result);
 		fprintf(stderr, "%s:%d: %s.\n%.*s\n",
-		     patch_input_file, linenr, err, len - 2, line + 1);
+			patch_input_file, linenr, err, len - 2, line + 1);
 		free(err);
 	}
 }
diff --git a/cache.h b/cache.h
index 64ef86e129..3dfa53c566 100644
--- a/cache.h
+++ b/cache.h
@@ -819,9 +819,8 @@ void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, i
 extern unsigned whitespace_rule_cfg;
 extern unsigned whitespace_rule(const char *);
 extern unsigned parse_whitespace_rule(const char *);
-extern unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
-    FILE *stream, const char *set,
-    const char *reset, const char *ws);
+extern unsigned ws_check(const char *line, int len, unsigned ws_rule);
+extern void ws_check_emit(const char *line, int len, unsigned ws_rule, FILE *stream, const char *set, const char *reset, const char *ws);
 extern char *whitespace_error_string(unsigned ws);
 extern int ws_fix_copy(char *, const char *, int, unsigned, int *);
 
diff --git a/diff.c b/diff.c
index c00d633c12..52a34eec91 100644
--- a/diff.c
+++ b/diff.c
@@ -535,9 +535,9 @@ static void emit_add_line(const char *reset, struct emit_callback *ecbdata, cons
 	else {
 		/* Emit just the prefix, then the rest. */
 		emit_line(ecbdata->file, set, reset, line, ecbdata->nparents);
-		(void)check_and_emit_line(line + ecbdata->nparents,
-		    len - ecbdata->nparents, ecbdata->ws_rule,
-		    ecbdata->file, set, reset, ws);
+		ws_check_emit(line + ecbdata->nparents,
+			      len - ecbdata->nparents, ecbdata->ws_rule,
+			      ecbdata->file, set, reset, ws);
 	}
 }
 
@@ -1153,8 +1153,7 @@ static void checkdiff_consume(void *priv, char *line, unsigned long len)
 	if (line[0] == '+') {
 		unsigned bad;
 		data->lineno++;
-		bad = check_and_emit_line(line + 1, len - 1,
-		    data->ws_rule, NULL, NULL, NULL, NULL);
+		bad = ws_check(line + 1, len - 1, data->ws_rule);
 		if (!bad)
 			return;
 		data->status |= bad;
@@ -1162,8 +1161,8 @@ static void checkdiff_consume(void *priv, char *line, unsigned long len)
 		fprintf(data->file, "%s:%d: %s.\n", data->filename, data->lineno, err);
 		free(err);
 		emit_line(data->file, set, reset, line, 1);
-		(void)check_and_emit_line(line + 1, len - 1, data->ws_rule,
-		    data->file, set, reset, ws);
+		ws_check_emit(line + 1, len - 1, data->ws_rule,
+			      data->file, set, reset, ws);
 	} else if (line[0] == ' ')
 		data->lineno++;
 	else if (line[0] == '@') {
diff --git a/ws.c b/ws.c
index ba7e834ca8..24d3e3de07 100644
--- a/ws.c
+++ b/ws.c
@@ -117,9 +117,9 @@ char *whitespace_error_string(unsigned ws)
 }
 
 /* If stream is non-NULL, emits the line after checking. */
-unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
-			     FILE *stream, const char *set,
-			     const char *reset, const char *ws)
+static unsigned ws_check_emit_1(const char *line, int len, unsigned ws_rule,
+				FILE *stream, const char *set,
+				const char *reset, const char *ws)
 {
 	unsigned result = 0;
 	int written = 0;
@@ -213,6 +213,18 @@ unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
 	return result;
 }
 
+void ws_check_emit(const char *line, int len, unsigned ws_rule,
+		   FILE *stream, const char *set,
+		   const char *reset, const char *ws)
+{
+	(void)ws_check_emit_1(line, len, ws_rule, stream, set, reset, ws);
+}
+
+unsigned ws_check(const char *line, int len, unsigned ws_rule)
+{
+	return ws_check_emit_1(line, len, ws_rule, NULL, NULL, NULL, NULL);
+}
+
 /* Copy the line to the buffer while fixing whitespaces */
 int ws_fix_copy(char *dst, const char *src, int len, unsigned ws_rule, int *error_count)
 {