From: Remi Tricot-Le Breton <rlebreton@haproxy.com>
Date: Wed, 28 Oct 2020 10:35:14 +0000 (+0100)
Subject: MINOR: ist: Add a case insensitive istmatch function
X-Git-Tag: v2.1.10~11
X-Git-Url: http://git.haproxy.org/?a=commitdiff_plain;h=7f8f26b26309beb0155c7f092174e5cb1fd8f2f2;p=haproxy-2.1.git

MINOR: ist: Add a case insensitive istmatch function

Add a helper function that checks if a string starts with another string
while ignoring case.

(cherry picked from commit bb4582cf719bcf9facf4e9b459fd3a68a97fffbd)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit fce0402a3bebcfae35ce2f7bff00b2e24174d89e)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
---

diff --git a/include/common/ist.h b/include/common/ist.h
index 0d8b457..3afe74e 100644
--- a/include/common/ist.h
+++ b/include/common/ist.h
@@ -297,6 +297,26 @@ static inline int istmatch(const struct ist ist1, const struct ist ist2)
 	return 1;
 }
 
+/* returns non-zero if <ist1> starts like <ist2>, ignoring the case (empty strings do match) */
+static inline int istmatchi(const struct ist ist1, const struct ist ist2)
+{
+	struct ist l = ist1;
+	struct ist r = ist2;
+
+	if (l.len < r.len)
+		return 0;
+
+	while (r.len--) {
+		if (*l.ptr != *r.ptr &&
+		    ist_lc[(unsigned char)*l.ptr] != ist_lc[(unsigned char)*r.ptr])
+			return 0;
+
+		l.ptr++;
+		r.ptr++;
+	}
+	return 1;
+}
+
 /* returns non-zero if <ist1> starts like <ist2> on the first <count>
  * characters (empty strings do match).
  */