Windows WCHAR 到 Linux wchar_t 字符类型的转换

桃扇骨 2022-07-13 04:38 193阅读 0赞

Windows WCHAR 到 Linux wchar\_t 字符类型的转换  
标签： windowslinux字符乱码转换  
2015-05-14 12:05 679人阅读 评论(0) 收藏 举报  
分类： Linux 编程（14）  
版权声明：本文为博主原创文章，未经博主允许不得转载。  
1、简介  
这几天涉及到一个小项目，Windows 和Linux通过TCP进行通信，但是他们之间的字符类型上是有区别的，所有Windows上的数据发送到Linux上后，如果不经过转换，会出现乱码的情况，Windows 的WCHAR类型实际上是wchar\_t，但是它只占用2个字节（既UTF-16），而Linux上wchar\_t则使用的是多字节（UTF-8），下面的函数提供了他们之间的相互转换！  
  
  
2、程序代码  
  
  
  
  
\#ifdef WINDOWS  
\#include <windows.h>  
\#include <stdio.h>  
\#include <ctype.h>  
\#else  
\#include <wchar.h>  
\#include <string.h>  
\#endif  
  
  
\#ifdef WIN32  
\#define USES\_WCSUTF16\_CONV  
\#define WCS2UTF16(wcs) (wcs)  
\#define UTF162WCS(utf16) (utf16)  
\#else //WIN32  
  
  
  
  
//wchar\_t to char16\_t  
unsigned short \* \_wcsu16\_wcs2utf16(wchar\_t \*wcs, unsigned short \* utf16, int len)  
\{  
int wc;  
wchar\_t \*end = wcs + len;  
unsigned short \* ret = utf16;  
while(wcs < end)  
\{  
wc = \*(wcs++);  
if (wc > 0xFFFF)  
\{  
wc -= 0x00010000L;  
\*utf16++ = 0xD800 | (wc >> 10);  
\*utf16++ = 0xDC00 | (wc & 0x03FF);  
\}  
else  
\{  
\*utf16++ = wc;  
\}  
\}  
return ret;  
\}  
  
  
//wchar\_t length  
int \_wcsu16\_utf16len(wchar\_t \*wcs)  
\{  
int wc;  
int ret = 0;  
while(wc = \*wcs++)  
ret += wc > 0xFFFF ? 2 : 1;  
return ret;  
\}  
  
  
//char16\_t length  
int \_wcsu16\_wcslen(unsigned short \* utf16)  
\{  
unsigned short \* start = utf16;  
while(\*utf16++) ;  
return (int)(utf16 - start - 1);  
\}  
  
  
//char16\_t to wchar\_t  
wchar\_t \* \_wcsu16\_utf162wcs(unsigned short \* utf16, wchar\_t \*wcs, int len)  
\{  
if (sizeof(unsigned short) == sizeof(wchar\_t))  
\{  
memcpy(wcs, utf16, (len + 1) \* sizeof(wchar\_t));  
return wcs;  
\}  
else  
\{  
int u32;  
unsigned short \*end = utf16 + len;  
wchar\_t \* ret = wcs;  
int u32low = 0;  
while (utf16 < end)  
\{  
u32 = \*utf16++;  
if (u32>=0xD800 && u32<0xDC00)  
\{  
u32low = \*utf16++;  
u32 &= 0x3FF;  
u32low &= 0x3FF;  
u32 <<= 10;  
u32 += u32low;  
u32 += 0x10000;  
\}  
\*wcs++ = u32;  
\}  
\*(wcs-1) = 0;  
return ret;  
\}  
\}  
  
  
  
  
\#define USES\_WCSUTF16\_CONV int \_len; (\_len); wchar\_t \* \_wcs; (\_wcs); unsigned short \* \_utf16; (\_utf16)  
  
  
\#define WCS2UTF16(wcs) \\  
(((\_wcs = wcs) == NULL) ? NULL : (\\  
\_len = (\_wcsu16\_utf16len(\_wcs)+1),\\  
\_wcsu16\_wcs2utf16(\_wcs, (unsigned short \*) alloca(\_len\*2), \_len)))  
  
  
\#define UTF162WCS(utf16) \\  
(((\_utf16 = utf16) == NULL) ? NULL : (\\  
\_len = (\_wcsu16\_wcslen(\_utf16)+1),\\  
\_wcsu16\_utf162wcs(\_utf16, (wchar\_t \*) alloca(\_len\*sizeof(wchar\_t)), \_len)))  
\#endif //WIN32  
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3、附加说明

Linux下表示Windows下的16位的wchar\_t类型可使用unsigned short来表示，也可直接使用C++中的char16\_t类型

[http://blog.csdn.net/cmbug/article/details/45719209][http_blog.csdn.net_cmbug_article_details_45719209]

[http_blog.csdn.net_cmbug_article_details_45719209]: http://blog.csdn.net/cmbug/article/details/45719209