Introducing helpers for construction and freeing of ecma-strings' collections.

src/libecmaobjects/ecma-helpers-strings-collection.c

@@ -0,0 +1,126 @@
+/* Copyright 2014 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** \addtogroup ecma ---TODO---
+ * @{
+ *
+ * \addtogroup ecmahelpers Helpers for operations with ECMA data types
+ * @{
+ */
+
+#include "ecma-alloc.h"
+#include "ecma-globals.h"
+#include "ecma-helpers.h"
+#include "globals.h"
+
+/**
+ * Allocate a collection of ecma-strings.
+ *
+ * @return pointer to the collection's header
+ */
+ecma_collection_header_t*
+ecma_new_strings_collection (ecma_string_t* string_ptrs_buffer[], /**< pointers to ecma-strings */
+                             ecma_length_t strings_number) /**< number of ecma-strings */
+{
+  JERRY_ASSERT (string_ptrs_buffer != NULL);
+  JERRY_ASSERT (strings_number > 0);
+
+  ecma_collection_header_t* header_p = ecma_alloc_collection_header ();
+
+  header_p->unit_number = strings_number;
+
+  uint16_t* next_chunk_cp_p = &header_p->next_chunk_cp;
+  uint16_t* cur_strcp_buf_iter_p = (uint16_t*) header_p->data;
+  uint16_t* cur_strcp_buf_end_p = cur_strcp_buf_iter_p + sizeof (header_p->data) / sizeof (uint16_t);
+
+  for (ecma_length_t string_index = 0;
+       string_index < strings_number;
+       string_index++)
+  {
+    if (unlikely (cur_strcp_buf_iter_p == cur_strcp_buf_end_p))
+    {
+      ecma_collection_chunk_t *chunk_p = ecma_alloc_collection_chunk ();
+      ECMA_SET_POINTER (*next_chunk_cp_p, chunk_p);
+      next_chunk_cp_p = &chunk_p->next_chunk_cp;
+
+      cur_strcp_buf_iter_p = (uint16_t*) chunk_p->data;
+      cur_strcp_buf_end_p = cur_strcp_buf_iter_p + sizeof (chunk_p->data) / sizeof (uint16_t);
+    }
+
+    JERRY_ASSERT (cur_strcp_buf_iter_p + 1 <= cur_strcp_buf_end_p);
+
+    ecma_ref_ecma_string (string_ptrs_buffer[string_index]);
+    ECMA_SET_POINTER (*cur_strcp_buf_iter_p, string_ptrs_buffer[string_index]);
+    cur_strcp_buf_iter_p++;
+  }
+
+  return header_p;
+} /* ecma_new_strings_collection */
+
+/**
+ * Free the collection of ecma-strings.
+ */
+void
+ecma_free_strings_collection (ecma_collection_header_t* header_p) /**< collection's header */
+{
+  JERRY_ASSERT (header_p != NULL);
+
+  uint16_t* cur_strcp_buf_iter_p = (uint16_t*) header_p->data;
+  uint16_t* cur_strcp_buf_end_p = cur_strcp_buf_iter_p + sizeof (header_p->data) / sizeof (uint16_t);
+
+  ecma_length_t string_index = 0;
+  while (cur_strcp_buf_iter_p != cur_strcp_buf_end_p
+         && string_index < header_p->unit_number)
+  {
+    JERRY_ASSERT (cur_strcp_buf_iter_p < cur_strcp_buf_end_p);
+
+    ecma_free_string (ECMA_GET_POINTER (*cur_strcp_buf_iter_p));
+
+    cur_strcp_buf_iter_p++;
+    string_index++;
+  }
+
+  ecma_collection_chunk_t *chunk_p = ECMA_GET_POINTER (header_p->next_chunk_cp);
+
+  while (chunk_p != NULL)
+  {
+    JERRY_ASSERT (string_index < header_p->unit_number);
+
+    cur_strcp_buf_iter_p = (uint16_t*) chunk_p->data;
+    cur_strcp_buf_end_p = cur_strcp_buf_iter_p + sizeof (chunk_p->data) / sizeof (uint16_t);
+
+    while (cur_strcp_buf_iter_p != cur_strcp_buf_end_p
+           && string_index < header_p->unit_number)
+    {
+      JERRY_ASSERT (cur_strcp_buf_iter_p < cur_strcp_buf_end_p);
+
+      ecma_free_string (ECMA_GET_POINTER (*cur_strcp_buf_iter_p));
+
+      cur_strcp_buf_iter_p++;
+      string_index++;
+    }
+
+    ecma_collection_chunk_t *next_chunk_p = ECMA_GET_POINTER (chunk_p->next_chunk_cp);
+    ecma_dealloc_collection_chunk (chunk_p);
+    chunk_p = next_chunk_p;
+  }
+
+  ecma_dealloc_collection_header (header_p);
+} /* ecma_free_strings_collection */
+
+/**
+ * @}
+ * @}
+ */

src/libecmaobjects/ecma-helpers.h

@@ -98,6 +98,11 @@ extern bool ecma_compare_zt_string_to_ecma_string (const ecma_char_t *string_p,
 extern bool ecma_compare_ecma_string_to_ecma_string (const ecma_string_t *string1_p,
                                                      const ecma_string_t *string2_p);
 
+/* ecma-helpers-strings-collection.c */
+extern ecma_collection_header_t *ecma_new_strings_collection (ecma_string_t* string_ptrs_buffer[],
+                                                              ecma_length_t strings_number);
+extern void ecma_free_strings_collection (ecma_collection_header_t* header_p);
+
 /* ecma-helpers.c */
 extern ecma_object_t* ecma_create_object (ecma_object_t *prototype_object_p,
                                           bool is_extensible,