ngx_strlcasestrn()
diff --git a/src/core/ngx_string.c b/src/core/ngx_string.c
index 0ad594f..fbde1c2 100644
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -692,6 +692,39 @@
}
+/*
+ * ngx_strlcasestrn() is intended to search for static substring
+ * with known length in string until the argument last. The argument n
+ * must be length of the second substring - 1.
+ */
+
+u_char *
+ngx_strlcasestrn(u_char *s1, u_char *last, u_char *s2, size_t n)
+{
+ ngx_uint_t c1, c2;
+
+ c2 = (ngx_uint_t) *s2++;
+ c2 = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
+ last -= n;
+
+ do {
+ do {
+ if (s1 == last) {
+ return NULL;
+ }
+
+ c1 = (ngx_uint_t) *s1++;
+
+ c1 = (c1 >= 'A' && c1 <= 'Z') ? (c1 | 0x20) : c1;
+
+ } while (c1 != c2);
+
+ } while (ngx_strncasecmp(s1, s2, n) != 0);
+
+ return --s1;
+}
+
+
ngx_int_t
ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
{
