cocos2dx中UTF-8和GBK2312之间的转换_cocos2d lua utf8转gp3212-优快云博客

本文链接：https://blog.youkuaiyun.com/Code_Nice/article/details/48950813

本文介绍了一个用于处理字符集转换的实用类，包括从GBK到UTF-8及反向转换的方法，并提供了一种检查字符串是否符合UTF-8编码规则的方式。该类使用iconv库进行字符集间的转换。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

#ifndef _CHARSET_CONVERT_H_
#define _CHARSET_CONVERT_H_

//starios alter
#include <stdlib.h>
#include "stddef.h"
#include <string>
using namespace std;
class CharsetConvert
{
public:
	static std::string GBKToUTF8(const char* msg);  
	static  std::string UTF8ToGBK(const char* msg);
	static int code_convert(const char *from_charset, const char *to_charset, const char *inbuf, size_t inlen, char *outbuf, size_t outlen);
	static int IsTextUTF8(const char* str,int length);	
};
#endif

.cpp中

#include "CharsetConvert.h"
#include <string>
#if(CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
  #include "external/win32-specific/icon/include/iconv.h"
#else
  #include "iconv/include/iconv.h""
#endif
int CharsetConvert::IsTextUTF8(const char* str,int length)
{
	int i;
	int nBytes=0;//UFT8可用1-6个字节编码,ASCII用一个字节
	char chr;
	bool bAllAscii=true; //如果全部都是ASCII, 说明不是UTF-8
	for(i=0;i<length;i++)
	{
		chr= *(str+i);
		if( (chr&0x80) != 0 ) // 判断是否ASCII编码,如果不是,说明有可能是UTF-8,ASCII用7位编码,但用一个字节存,最高位标记为0,o0xxxxxxx
			bAllAscii= false;
		if(nBytes==0) //如果不是ASCII码,应该是多字节符,计算字节数
		{
			if(chr>=0x80)
			{
				if(chr>=0xFC&&chr<=0xFD)
					nBytes=6;
				else if(chr>=0xF8)
					nBytes=5;
				else if(chr>=0xF0)
					nBytes=4;
				else if(chr>=0xE0)
					nBytes=3;
				else if(chr>=0xC0)
					nBytes=2;
				else
				{
					return false;
				}
				nBytes--;
			}
		}
		else //多字节符的非首字节,应为 10xxxxxx
		{
			if( (chr&0xC0) != 0x80 )
			{
				return false;
			}
			nBytes--;
		}
	}
	if( nBytes > 0 ) //违返规则
	{
		return false;
	}
	if( bAllAscii ) //如果全部都是ASCII, 说明不是UTF-8
	{
		return false;
	}
	return true;
}


int CharsetConvert::code_convert(const char *from_charset, const char *to_charset, const char *inbuf, size_t inlen, char *outbuf, size_t outlen)
{
	iconv_t cd;
	const char *temp = inbuf;
	const char **pin = &temp;
	char **pout = &outbuf;
	memset(outbuf,0,outlen);
	cd = iconv_open(to_charset,from_charset);
	if(cd==0) return -1;
	if(iconv(cd,pin,&inlen,pout,&outlen)==-1) return -1;
	iconv_close(cd);
	return 0;
}

  
std::string CharsetConvert::GBKToUTF8(const char *inbuf)
{
	size_t inlen = strlen(inbuf);
	char * outbuf = new char[inlen * 2 + 2];
	std::string strRet;
	if(code_convert("gb2312", "utf-8", inbuf, inlen, outbuf, inlen * 2 + 2) == 0)
	{
		strRet = outbuf;
	}
	delete [] outbuf;
	return strRet;
}


std::string CharsetConvert::UTF8ToGBK(const char *inbuf)
{
	size_t inlen = strlen(inbuf);
	char * outbuf = new char[inlen * 2 + 2];
	std::string strRet;
	if(code_convert("utf-8", "gb2312", inbuf, inlen, outbuf, inlen * 2 + 2) == 0)
	{
		strRet = outbuf;
	}
	delete [] outbuf;
	return strRet;
}