ANSI 和Unicode 编码

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原文链接：http://www.cnblogs.com/niannian/archive/2012/09/24/2721751.html

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#游戏

本文详细介绍了Cocos2d-x Win8平台中将UTF8字符串转换为Unicode字符串的方法，包括获取UTF8字符串长度、转换过程以及从Unicode字符串回转为UTF8字符串的实现。

  https://github.com/cocos2d-x/cocos2dx-win8/blob/master/cocos2dx/platform/CCCommon.cpp
 

   
 

  std
  ::
  wstring 
  CCUtf8ToUnicode
  (
  const 
  char 
  * 
  pszUtf8Str
  , 
  unsigned 
  len
  /* = -1*/
  )
 

  {
 

      
  std
  ::
  wstring 
  ret
  ;
 

      
  do
 

      
  {
 

          
  if 
  (
  ! 
  pszUtf8Str
  ) 
  break
  ;
 

  // get UTF8 string length
 

  if 
  (
  -
  1 
  == 
  len
  )
 

  {
 

  len 
  = 
   strlen
  (
  pszUtf8Str
  );
 

  }
 

          
  if 
  (
  len 
  <= 
  0
  ) 
   break
  ;
 

  

 

  // get UTF16 string length
 

  int 
  wLen 
  = 
  MultiByteToWideChar
  (
  CP_UTF8
  , 
  0
  , 
  pszUtf8Str
  , 
  len
  , 
  0
  , 
  0
  );
 

  if 
  (
  0 
  == 
  wLen 
  || 
   0xFFFD 
  == 
  wLen
  ) 
  break
  ;
 

  

 

  // convert string  
 

          
  wchar_t 
   * 
  pwszStr 
  = 
   new 
  wchar_t
  [
  wLen 
  + 
  1
  ];
 

          
  if 
  (
  ! 
  pwszStr
  ) 
  break
  ;
 

          
  pwszStr
  [
  wLen
  ] 
  = 
  0
  ;
 

          
  MultiByteToWideChar
  (
  CP_UTF8
  , 
  0
  , 
  pszUtf8Str
  , 
  len
  , 
  pwszStr
  , 
  wLen 
  + 
  1
  );
 

          
  ret 
  = 
  pwszStr
  ;
 

          
  CC_SAFE_DELETE_ARRAY
  (
  pwszStr
  );
 

      
  } 
  while 
  (
  0
  );
 

      
  return 
  ret
  ;
 

  }
 

  

 

  std
  ::
  string 
  CCUnicodeToUtf8
  (
  const 
  wchar_t
  * 
  pwszStr
  )
 

  {
 

  std
  ::
  string 
  ret
  ;
 

  do
 

  {
 

  if
  (
  ! 
  pwszStr
  ) 
  break
  ;
 

  size_t 
  len 
  = 
  wcslen
  (
  pwszStr
  );
 

  if 
  (
  len 
  <= 
  0
  ) 
   break
  ;
 

  

 

  size_t 
  convertedChars 
  = 
  0
  ;
 

  char 
  * 
  pszUtf8Str 
  = 
  new 
  char
  [
  len
  *
  3 
  + 
  1
  ];
 

  WideCharToMultiByte
  (
  CP_UTF8
  , 
  0
  , 
  pwszStr
  , 
  len
  +
  1
  , 
  pszUtf8Str
  , 
  len
  *
  3 
  + 
  1
  , 
   0
  , 
  0
  );
 

  ret 
  = 
   pszUtf8Str
  ;
 

  CC_SAFE_DELETE_ARRAY
  (
  pszUtf8Str
  );
 

  }
  while
  (
  0
  );
 

  

 

  return 
  ret
  ;
 

  }
 