3 files changed, 14 insertions, 3 deletions
diff --git a/src/core/ngx_hash.c b/src/core/ngx_hash.c
index abd2cf173..c39395c7b 100644
--- a/src/core/ngx_hash.c
+++ b/src/core/ngx_hash.c
@@ -390,9 +390,7 @@ found:
         elt->value = names[n].value;
         elt->len = (u_char) names[n].key.len;
 
-        for (i = 0; i < names[n].key.len; i++) {
-            elt->name[i] = ngx_tolower(names[n].key.data[i]);
-        }
+        ngx_strlow(elt->name, names[n].key.data, names[n].key.len);
 
         test[key] = (u_short) (test[key] + NGX_HASH_ELT_SIZE(&names[n]));
     }
diff --git a/src/core/ngx_string.c b/src/core/ngx_string.c
index 2da6c8319..203cd3e37 100644
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -8,6 +8,17 @@
 #include <ngx_core.h>
 
 
+void
+ngx_strlow(u_char *dst, u_char *src, size_t n)
+{
+    while (n--) {
+        *dst = ngx_tolower(*src);
+        dst++;
+        src++;
+    }
+}
+
+
 u_char *
 ngx_cpystrn(u_char *dst, u_char *src, size_t n)
 {
diff --git a/src/core/ngx_string.h b/src/core/ngx_string.h
index dfb3bc4cc..fff618b19 100644
--- a/src/core/ngx_string.h
+++ b/src/core/ngx_string.h
@@ -43,6 +43,8 @@ typedef struct {
 #define ngx_tolower(c)      (u_char) ((c >= 'A' && c <= 'Z') ? (c | 0x20) : c)
 #define ngx_toupper(c)      (u_char) ((c >= 'a' && c <= 'z') ? (c & ~0x20) : c)
 
+void ngx_strlow(u_char *dst, u_char *src, size_t n);
+
 
 #define ngx_strncmp(s1, s2, n)  strncmp((const char *) s1, (const char *) s2, n)