parser/html/nsHtml5ArrayCopy.h

   1 /*
   2  * Copyright (c) 2008 Mozilla Foundation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifndef nsHtml5ArrayCopy_h
  24 #define nsHtml5ArrayCopy_h
  25
  26 class nsHtml5StackNode;
  27
  28 // Unfortunately, these don't work as template functions because the arguments
  29 // would need coercion from a template class, which complicates things.
  30 class nsHtml5ArrayCopy {
  31  public:
  32   static inline void arraycopy(char16_t* source, int32_t sourceOffset,
  33                                char16_t* target, int32_t targetOffset,
  34                                int32_t length) {
  35     memcpy(&(target[targetOffset]), &(source[sourceOffset]),
  36            size_t(length) * sizeof(char16_t));
  37   }
  38
  39   static inline void arraycopy(char16_t* source, char16_t* target,
  40                                int32_t length) {
  41     memcpy(target, source, size_t(length) * sizeof(char16_t));
  42   }
  43
  44   static inline void arraycopy(int32_t* source, int32_t* target,
  45                                int32_t length) {
  46     memcpy(target, source, size_t(length) * sizeof(int32_t));
  47   }
  48
  49   static inline void arraycopy(nsHtml5StackNode** source,
  50                                nsHtml5StackNode** target, int32_t length) {
  51     memcpy(target, source, size_t(length) * sizeof(nsHtml5StackNode*));
  52   }
  53
  54   static inline void arraycopy(nsHtml5StackNode** arr, int32_t sourceOffset,
  55                                int32_t targetOffset, int32_t length) {
  56     memmove(&(arr[targetOffset]), &(arr[sourceOffset]),
  57             size_t(length) * sizeof(nsHtml5StackNode*));
  58   }
  59 };
  60 #endif  // nsHtml5ArrayCopy_h