iconv 关于c++的编码转换

[kurorohisoka]

我是在fedora下写的，为什么我转换后输出总是空？代码如下：
#include <iostream>
#include <fstream>
#include <iconv.h>
#include <stdlib.h>
#include <string.h>
using namespace std;

int main()
{
char i;
fstream fs;
fs.open("sina.html",fstream::in|fstream::binary);
string instr="";
while(!fs.eof())
{
fs>>i;
if(fs.eof())break;
instr+=i;
}
instr+='\n';
size_t length=instr.length();
char* inbuf=(char*)malloc(length+1);
for(int h=0;h<length;h++)
{
inbuf[h]=instr[h];
}
inbuf[length]='\0';
char* outbuf=new char[length*2];
char* outptr;
//outbuf=(char*)malloc(length*2);
outptr=outbuf;
memset(outbuf,'\0',length*2);
iconv_t cd;
cd=iconv_open("utf-8","GB2312");
if(cd==(iconv_t)-1)
{
cout<<"fail"<<endl;
}
size_t avail=length*2;
size_t nconv=iconv(cd,&inbuf,&length,&outbuf,&avail);
cout<<outbuf<<endl;
iconv_close(cd);
return 1;
}

谢谢大家了！

[kurorohisoka]

sina.html是我把新浪的主页，查看源代码，然后复制保存到一个html的文件中。

[hoomien]

帮顶

[w0911h]

这是我程序中的一段转换代码，希望对你有帮助

int code_convert(char *from_charset,char *to_charset,char *inbuf,size_t inlen,char *outbuf,size_t outlen)
{
	iconv_t cd;
	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,size_t inlen,char *outbuf,size_t 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);
}

[w0911h]

另外你读文件的时候用char可能有问题，改成unsined char试试

[pathuang68]

顶一下