move xhash to another repo

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "extlib/xhash"]
+	path = extlib/xhash
+	url = git://github.com/wasabiz/xhash.git

extlib/xhash

@@ -0,0 +1 @@
+Subproject commit 350f8895bf888aceea87c38e38e19adfd604f9d2

extlib/xhash/xhash.h

@@ -1,100 +0,0 @@
-#ifndef XHASH_H__
-#define XHASH_H__
-
-/*
- * Copyright (c) 2013 by Yuichi Nishiwaki <yuichi.nishiwaki@gmail.com>
- */
-
-#include <stdlib.h>
-#include <string.h>
-
-/* simple string to int hash table */
-
-#define XHASH_INIT_SIZE 11
-
-struct xh_entry {
-  struct xh_entry *next;
-  const char *key;
-  int val;
-};
-
-struct xhash {
-  struct xh_entry **buckets;
-  size_t size;
-};
-
-static inline struct xhash *
-xh_new()
-{
-  struct xhash *x;
-
-  x = (struct xhash *)malloc(sizeof(struct xhash));
-  x->size = XHASH_INIT_SIZE;
-  x->buckets = (struct xh_entry **)calloc(XHASH_INIT_SIZE, sizeof(struct xh_entry *));
-  return x;
-}
-
-static int
-xh_hash(const char *str)
-{
-  int hash = 0;
-
-  while (*str) {
-    hash = hash * 31 + *str++;
-  }
-  return hash;
-}
-
-static inline struct xh_entry *
-xh_get(struct xhash *x, const char *key)
-{
-  int idx;
-  struct xh_entry *e;
-
-  idx = xh_hash(key) % x->size;
-  for (e = x->buckets[idx]; e; e = e->next) {
-    if (strcmp(key, e->key) == 0)
-      return e;
-  }
-  return NULL;
-}
-
-static inline struct xh_entry *
-xh_put(struct xhash *x, const char *key, int val)
-{
-  int idx;
-  struct xh_entry *e;
-
-  if ((e = xh_get(x, key))) {
-    e->val = val;
-    return e;
-  }
-
-  idx = xh_hash(key) % x->size;
-  e = (struct xh_entry *)malloc(sizeof(struct xh_entry));
-  e->next = x->buckets[idx];
-  e->key = strdup(key);
-  e->val = val;
-
-  return x->buckets[idx] = e;
-}
-
-static inline void
-xh_destory(struct xhash *x)
-{
-  int i;
-  struct xh_entry *e, *d;
-
-  for (i = 0; i < x->size; ++i) {
-    e = x->buckets[i];
-    while (e) {
-      d = e->next;
-      free((void*)e->key);
-      free(e);
-      e = d;
-    }
-  }
-  free(x);
-}
-
-#endif