In strbuf_add_commented_lines(), we have to convert the single-byte
comment_line_char into a string to pass to add_lines(). We cache the
created string using a static-local variable. But this makes the
function non-reentrant, and it's doubtful that this provides any real
performance benefit given that we know the string always contains a
single character.
So let's just create it from scratch each time, and to give the compiler
the maximal opportunity to make it fast we'll ditch the over-complicated
xsnprintf() and just assign directly into the array.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
strbuf.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/strbuf.c b/strbuf.c
index 689d8acd5e..ca80a2c77e 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -361,10 +361,10 @@ static void add_lines(struct strbuf *out,
void strbuf_add_commented_lines(struct strbuf *out, const char *buf,
size_t size, char comment_line_char)
{
- static char prefix[2];
+ char prefix[2];
- if (prefix[0] != comment_line_char)
- xsnprintf(prefix, sizeof(prefix), "%c", comment_line_char);
+ prefix[0] = comment_line_char;
+ prefix[1] = '\0';
add_lines(out, prefix, buf, size, 1);
}
--
2.44.0.481.gf1a6d20963
