[PATCH v3 3/5] pretty-print: further abstract out pp_handle_indent()

[Junio C Hamano <gitster@pobox.com>]

Separate the call to add 4-space indent, and a new helper to add a
line after de-tabifying.

The new helper function strbuf_add_tabexpand() could later be moved
to strbuf.[ch] if other callers need to.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 pretty.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/pretty.c b/pretty.c
index 6d657fc..717ceed 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1643,18 +1643,12 @@ static int pp_utf8_width(const char *start, const char *end)
 	return width;
 }
 
-/*
- * pp_handle_indent() prints out the intendation, and
- * the whole line (without the final newline), after
- * de-tabifying.
- */
-static void pp_handle_indent(struct strbuf *sb, int indent,
-			     const char *line, int linelen)
+
+static void strbuf_add_tabexpand(struct strbuf *sb,
+				 const char *line, int linelen)
 {
 	const char *tab;
 
-	strbuf_addchars(sb, ' ', indent);
-
 	while ((tab = memchr(line, '\t', linelen)) != NULL) {
 		int width = pp_utf8_width(line, tab);
 
@@ -1686,6 +1680,18 @@ static void pp_handle_indent(struct strbuf *sb, int indent,
 	strbuf_add(sb, line, linelen);
 }
 
+/*
+ * pp_handle_indent() prints out the intendation, and
+ * the whole line (without the final newline), after
+ * de-tabifying.
+ */
+static void pp_handle_indent(struct strbuf *sb, int indent,
+			     const char *line, int linelen)
+{
+	strbuf_addchars(sb, ' ', indent);
+	strbuf_add_tabexpand(sb, line, linelen);
+}
+
 void pp_remainder(struct pretty_print_context *pp,
 		  const char **msg_p,
 		  struct strbuf *sb,
-- 
2.8.0-rc4-198-g3f6b64c