# HG changeset patch
# User Igor Sysoev <igor@sysoev.ru>
# Date 1191243630 0
# Node ID d0bdd5f2276e16b1b64f8a20182264eabf76abc6
# Parent  099d8470e6c3fc2835bda2c705e276e3acc2e924
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diff --git a/src/core/ngx_string.c b/src/core/ngx_string.c
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -503,6 +503,12 @@ ngx_strncasecmp(u_char *s1, u_char *s2, 
 }
 
 
+/*
+ * ngx_strstrn() and ngx_strcasestrn() are intended to search for static
+ * substring with known length in null-terminated string. The argument n
+ * must be length of the second substring - 1.
+ */
+
 u_char *
 ngx_strstrn(u_char *s1, char *s2, size_t n)
 {