add line length parameter to _alpm_strip_newline

If known, callers can pass the line size to this function in order to
avoid an strlen call. Otherwise, they simply pass 0 and
_alpm_strip_newline will do the call instead.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 8fd7a100..c2b5d443 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -195,15 +195,17 @@ cleanup:
 
 /** Trim trailing newlines from a string (if any exist).
  * @param str a single line of text
+ * @param len size of str, if known, else 0
  * @return the length of the trimmed string
  */
-size_t _alpm_strip_newline(char *str)
+size_t _alpm_strip_newline(char *str, size_t len)
 {
-	size_t len;
 	if(*str == '\0') {
 		return 0;
 	}
-	len = strlen(str);
+	if(len == 0) {
+		len = strlen(str);
+	}
 	while(len > 0 && str[len - 1] == '\n') {
 		len--;
 	}