From: Timo Sirainen <timo.sirainen@dovecot.fi>
Date: Fri, 3 Nov 2017 23:35:44 +0000 (+0200)
Subject: lib: str_tabunescape() - optimize initial escape char lookup
X-Git-Tag: 2.2.34~255
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fc4595194f362ee9be37d56a4652c2b12d63c32f;p=thirdparty%2Fdovecot%2Fcore.git

lib: str_tabunescape() - optimize initial escape char lookup

strchr() is faster than looping ourself.
---

diff --git a/src/lib/strescape.c b/src/lib/strescape.c
index eec040cba0..3a7968ad41 100644
--- a/src/lib/strescape.c
+++ b/src/lib/strescape.c
@@ -201,10 +201,10 @@ char *str_tabunescape(char *str)
 	/* @UNSAFE */
 	char *dest, *start = str;
 
-	while (*str != '\001') {
-		if (*str == '\0')
-			return start;
-		str++;
+	str = strchr(str, '\001');
+	if (str == NULL) {
+		/* no unescaping needed */
+		return start;
 	}
 
 	for (dest = str; *str != '\0'; str++) {