import of version 0.1

git-svn-id: http://svn.metaparadigm.com/svn/json-c/trunk@2 327403b1-1117-474d-bef2-5cb71233fd97

arraylist.c

@@ -0,0 +1,94 @@
+/*
+ * $Id: arraylist.c,v 1.2 2004/07/21 01:24:33 mclark Exp $
+ *
+ * Copyright Metaparadigm Pte. Ltd. 2004.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public (LGPL)
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details: http://www.gnu.org/
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+#include "bits.h"
+#include "arraylist.h"
+
+
+struct array_list*
+array_list_new(array_list_free_fn *free_fn)
+{
+  struct array_list *this;
+
+  if(!(this = calloc(1, sizeof(struct array_list)))) return NULL;
+  this->size = ARRAY_LIST_DEFAULT_SIZE;
+  this->length = 0;
+  this->free_fn = free_fn;
+  if(!(this->array = calloc(sizeof(void*), this->size))) {
+    free(this);
+    return NULL;
+  }
+  return this;
+}
+
+extern void
+array_list_free(struct array_list *this)
+{
+  int i;
+  for(i = 0; i < this->length; i++)
+    if(this->array[i]) this->free_fn(this->array[i]);
+  free(this->array);
+  free(this);
+}
+
+void*
+array_list_get_idx(struct array_list *this, int i)
+{
+  if(i >= this->length) return NULL;
+  return this->array[i];
+}
+
+static int array_list_expand_internal(struct array_list *this, int max)
+{
+  void *t;
+  int new_size;
+
+  if(max < this->size) return 0;
+  new_size = max(this->size << 1, max);
+  if(!(t = realloc(this->array, new_size*sizeof(void*)))) return -1;
+  this->array = t;
+  bzero(this->array + this->size, (new_size-this->size)*sizeof(void*));
+  this->size = new_size;
+  return 0;
+}
+
+int
+array_list_put_idx(struct array_list *this, int idx, void *data)
+{
+  if(array_list_expand_internal(this, idx)) return -1;
+  if(this->array[idx]) this->free_fn(this->array[idx]);
+  this->array[idx] = data;
+  if(this->length <= idx) this->length = idx + 1;
+  return 0;
+}
+
+int
+array_list_add(struct array_list *this, void *data)
+{
+  return array_list_put_idx(this, this->length, data);
+}
+
+int
+array_list_length(struct array_list *this)
+{
+  return this->length;
+}