linux下C语言utf-8编码与gb2312转换代码---libiconv

linux下C语言utf-8编码与gb2312转换代码

2010-04-02 14:09

int code_convert(char *from_charset, char *to_charset, char *inbuf, int inlen, char *outbuf, int outlen)
{
iconv_t cd;
int rc;
char **pin = &inbuf;
char **pout = &outbuf;

cd = iconv_open(to_charset, from_charset);

if (cd == 0) 
return 1;

memset(outbuf, 0, outlen);

if (iconv(cd, pin, &inlen, pout, &outlen) == -1) 
return 1;

iconv_close(cd);
return 0;
}

我也发一个自己写的程序，一直在用的

/******************************************************
EncodingConv.c
使用iconv进行字符编码转换
SUNLAN
2006/08/17
******************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <iconv.h>
#include <errno.h>
#include "SDKpub.h"

#ifndef ERRFILE
#define ERRFILE "errlog"
#endif

char * EncodingConv(  const char * in, char *encFrom, char *encTo )
{

char *buff, *sin, *sout;
int lenin, lenout;
iconv_t ct;

if( (ct=iconv_open(encTo, encFrom)) == (iconv_t)-1 )
{
SDKerrlog( ERRFILE, "%s|%d| iconv_open error! %s", __FILE__,
__LINE__, strerror(errno) );
return( NULL );
}

iconv( ct, NULL, NULL, NULL, NULL );

sin = (char *)in;
lenin  = strlen(in) + 1;

if( (buff=malloc( lenin*2 ))==NULL )
{
SDKerrlog( ERRFILE, "%s|%d| malloc error! %s", __FILE__, __LINE__,
strerror(errno) );
iconv_close( ct );
return( NULL );
}
sout   = buff;
lenout = lenin*2;

if( iconv( ct, &sin, (size_t *)&lenin, &sout, (size_t *)&lenout) == -1 )
{
SDKerrlog( ERRFILE, "%s|%d| iconv() error! errno=%d %s", __FILE__,
__LINE__, errno, strerror(errno) );
free( buff );
iconv_close( ct );
return NULL;
}

iconv_close( ct );

sout=strdup(buff);
free( buff );

return( sout );
}


over

linux C C++ 字符集转换,UTF-8,GB2312

http://jazka.blog.51cto.com/809003/231917

在LINUX上进行编码转换时,既可以利用iconv函数族编程实现,也可以利用iconv命令来实现,只不过后者是针对文件的,即将指定文件从一种编码转换为另一种编码。 
一、利用iconv函数族进行编码转换 
iconv函数族的头文

在LINUX上进行编码转换时,既可以利用iconv函数族编程实现,也可以利用iconv命令来实现,只不过后者是针对文件的,即将指定文件从一种编码转换为另一种编码。 
一、利用iconv函数族进行编码转换 
iconv函数族的头文件是iconv.h,使用前需包含之。 
#include <iconv.h> 
iconv函数族有三个函数,原型如下: 
(1) iconv_t iconv_open(const char *tocode, const char *fromcode); 
此函数说明将要进行哪两种编码的转换,tocode是目标编码,fromcode是原编码,该函数返回一个转换句柄,供以下两个函数使用。 
(2) size_t iconv(iconv_t cd,char **inbuf,size_t *inbytesleft,char **outbuf,size_t *outbytesleft); 
此函数从inbuf中读取字符,转换后输出到outbuf中,inbytesleft用以记录还未转换的字符数,outbytesleft用以记录输出缓冲的剩余空间。 (3) int iconv_close(iconv_t cd); 
此函数用于关闭转换句柄,释放资源。 
例子1: 用C语言实现的转换示例程序 

/* f.c : 代码转换示例C程序 */ 
#include <iconv.h> 
#define OUTLEN 255 
main() 
{ 
char *in_utf8 = "姝ｅ?ㄥ??瑁?"; 
char *in_gb2312 = "正在安装"; 
char out[OUTLEN]; 

//unicode码转为gb2312码 
rc = u2g(in_utf8,strlen(in_utf8),out,OUTLEN); 
printf("unicode-->gb2312 out=%sn",out); 
//gb2312码转为unicode码 
rc = g2u(in_gb2312,strlen(in_gb2312),out,OUTLEN); 
printf("gb2312-->unicode out=%sn",out); 
} 
//代码转换:从一种编码转为另一种编码 
int code_convert(char *from_charset,char *to_charset,char *inbuf,int inlen,char *outbuf,int outlen) 
{ 
iconv_t cd; 
int rc; 
char **pin = &inbuf; 
char **pout = &outbuf; 

cd = iconv_open(to_charset,from_charset); 
if (cd==0) return -1; 
memset(outbuf,0,outlen); 
if (iconv(cd,pin,&inlen,pout,&outlen)==-1) return -1; 
iconv_close(cd); 
return 0; 
} 
//UNICODE码转为GB2312码 
int u2g(char *inbuf,int inlen,char *outbuf,int outlen) 
{ 
return code_convert("utf-8","gb2312",inbuf,inlen,outbuf,outlen); 
} 
//GB2312码转为UNICODE码 
int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen) 
{ 
return code_convert("gb2312","utf-8",inbuf,inlen,outbuf,outlen); 
} 

例子2: 用C++语言实现的转换示例程序 

/* f.cpp : 代码转换示例C++程序 */ 
#include <iconv.h> 
#include <iostream> 

#define OUTLEN 255 

using namespace std; 

// 代码转换操作类 
class CodeConverter { 
private: 
iconv_t cd; 
public: 
// 构造 
CodeConverter(const char *from_charset,const char *to_charset) { 
cd = iconv_open(to_charset,from_charset); 
} 

// 析构 
~CodeConverter() { 
iconv_close(cd); 
} 

// 转换输出 
int convert(char *inbuf,int inlen,char *outbuf,int outlen) { 
char **pin = &inbuf; 
char **pout = &outbuf; 

memset(outbuf,0,outlen); 
return iconv(cd,pin,(size_t *)&inlen,pout,(size_t *)&outlen); 
} 
}; 

int main(int argc, char **argv) 
{ 
char *in_utf8 = "姝ｅ?ㄥ??瑁?"; 
char *in_gb2312 = "正在安装"; 
char out[OUTLEN]; 

// utf-8-->gb2312 
CodeConverter cc = CodeConverter("utf-8","gb2312"); 
cc.convert(in_utf8,strlen(in_utf8),out,OUTLEN); 
cout << "utf-8-->gb2312 in=" << in_utf8 << ",out=" << out << endl; 

// gb2312-->utf-8 
CodeConverter cc2 = CodeConverter("gb2312","utf-8"); 
cc2.convert(in_gb2312,strlen(in_gb2312),out,OUTLEN); 
cout << "gb2312-->utf-8 in=" << in_gb2312 << ",out=" << out << endl; 
}

 

linux C 字符集转换,UTF-8,GB2312

最近帮朋友写个系统接口的小东东，2个系统字符集不同，一个采用UTF-8,一个采用GB2312，不得已需要转换字符集。转换函数记录如下：

#include <iconv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define OUTLEN 255
main()
{
char *in_utf8 = "utf8字符串";
char *in_gb2312 = "\xbe\xb2\xcc\xac\xc4\xa3\xca\xbd";

char out[OUTLEN];
int rec ;

//unicode码转为gb2312码
rec = u2g(in_utf8,strlen(in_utf8),out,OUTLEN);
printf("unicode-->gb2312 out=%s\n",out);

//gb2312码转为unicode码
rec = g2u(in_gb2312,strlen(in_gb2312),out,OUTLEN);
printf("gb2312-->unicode out=%s \n",out);
}
//代码转换:从一种编码转为另一种编码
int code_convert(char *from_charset,char *to_charset,char *inbuf,int inlen,char *outbuf,int outlen)
{
iconv_t cd;
int rc;
char **pin = &inbuf;
char **pout = &outbuf;

cd = iconv_open(to_charset,from_charset);
if (cd==0) return -1;
memset(outbuf,0,outlen);
if (iconv(cd,pin,&inlen,pout,&outlen)==-1) return -1;
iconv_close(cd);
return 0;
}
//UNICODE码转为GB2312码
int u2g(char *inbuf,int inlen,char *outbuf,int outlen)
{
return code_convert("utf-8","gb2312",inbuf,inlen,outbuf,outlen);
}
//GB2312码转为UNICODE码
int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen)
{
return code_convert("gb2312","utf-8",inbuf,inlen,outbuf,outlen);