ngx_hash_strlow()

2 files changed, 21 insertions, 6 deletions

diff --git a/src/core/ngx_hash.c b/src/core/ngx_hash.c
index c39395c7b..2954266ae 100644
--- a/src/core/ngx_hash.c
+++ b/src/core/ngx_hash.c
@@ -620,6 +620,24 @@ ngx_hash_key_lc(u_char *data, size_t len)
 }
 
 
+ngx_uint_t
+ngx_hash_strlow(u_char *dst, u_char *src, size_t n)
+{
+    ngx_uint_t  key;
+
+    key = 0;
+
+    while (n--) {
+        *dst = ngx_tolower(*src);
+        key = ngx_hash(key, *dst);
+        dst++;
+        src++;
+    }
+
+    return key;
+}
+
+
 ngx_int_t
 ngx_hash_keys_array_init(ngx_hash_keys_arrays_t *ha, ngx_uint_t type)
 {
@@ -794,12 +812,7 @@ wildcard:
 
     /* wildcard hash */
 
-    k = 0;
-
-    for (i = skip; i < last; i++) {
-        key->data[i] = ngx_tolower(key->data[i]);
-        k = ngx_hash(k, key->data[i]);
-    }
+    k = ngx_hash_strlow(&key->data[skip], &key->data[skip], last - skip);
 
     k %= ha->hsize;
 
diff --git a/src/core/ngx_hash.h b/src/core/ngx_hash.h
index 95e04046f..76e3c774e 100644
--- a/src/core/ngx_hash.h
+++ b/src/core/ngx_hash.h
@@ -110,6 +110,8 @@ ngx_int_t ngx_hash_wildcard_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names,
 #define ngx_hash(key, c)   ((ngx_uint_t) key * 31 + c)
 ngx_uint_t ngx_hash_key(u_char *data, size_t len);
 ngx_uint_t ngx_hash_key_lc(u_char *data, size_t len);
+ngx_uint_t ngx_hash_strlow(u_char *dst, u_char *src, size_t n);
+
 
 ngx_int_t ngx_hash_keys_array_init(ngx_hash_keys_arrays_t *ha, ngx_uint_t type);
 ngx_int_t ngx_hash_add_key(ngx_hash_keys_arrays_t *ha, ngx_str_t *key,