字符格式转换失败～跪求指导,该怎么处理

字符格式转换失败～～跪求指导
错误提示：
(gdb) R
Starting program: /qtopia/bin/makeobu2

Program received signal SIGSEGV, Segmentation fault.
0x0002cf88 in _Q (str=0x6a098 "ת»»ÎªUTF8×Ö·û¼¯Ê§°Ü!") at rsutils.cpp:1113

相关代码

C/C++ code

QString _Q(const char *str){#define OUTLEN 1024  char *in_gb2312 = (char *)str;  char out[OUTLEN];  int rc = g2u(in_gb2312, strlen(in_gb2312), out, OUTLEN);  if(rc == 0)  {    return QString::fromUtf8(out);  }  else  {    return _Q("转换为UTF8字符集失败!");  }}

g2u代码：

C/C++ code

int g2u(char *inbuf, size_t inlen, char *outbuf, size_t outlen){  return code_convert("GB2312", "UTF-8", inbuf, inlen, outbuf, outlen);}

code_convert代码：

C/C++ code

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 == (iconv_t) 0)  {    return -1;  }  memset(outbuf, 0, outlen);  if((int)(iconv(cd, pin, &inlen, pout, &outlen)) == -1)  {    iconv_close(cd);    return -1;  }  else  {    iconv_close(cd);    return 0;  }}

基本可以确定错误出现在if((int)(iconv(cd, pin, &inlen, pout, &outlen)) == -1)这里成立，求各位大牛指导

[解决办法]
古怪。
肉眼看不出问题，手边又没环境，帮你顶吧。
[解决办法]
字符集的问题总是很头大的。看看下面的链接吧。
http://en.cppreference.com/w/cpp/locale/codecvt
[解决办法]
RETURN VALUE
The iconv_open() function returns a freshly allocated conversion
descriptor. In case of error, it sets errno and returns (iconv_t)(-1).


if(cd == (iconv_t) 0)
{
return -1;
}
和0比较干嘛？
[解决办法]

C/C++ code

//iconv_linux下字符集编码转换轻松实现(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 255main(){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 255using 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-->gb2312CodeConverter 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-8CodeConverter cc2 = CodeConverter("gb2312","utf-8");cc2.convert(in_gb2312,strlen(in_gb2312),out,OUTLEN);cout << "gb2312-->utf-8 in=" << in_gb2312 << ",out=" << out << endl;}二、利用iconv命令进行编码转换iconv命令用于转换指定文件的编码,默认输出到标准输出设备,亦可指定输出文件。用法： iconv [选项...] [文件...]有如下选项可用:输入/输出格式规范：-f, --from-code=名称 原始文本编码-t, --to-code=名称 输出编码信息：-l, --list 列举所有已知的字符集输出控制：-c 从输出中忽略无效的字符-o, --output=FILE 输出文件-s, --silent 关闭警告--verbose 打印进度信息-?, --help 给出该系统求助列表--usage 给出简要的用法信息-V, --version 打印程序版本号例子:iconv -f utf-8 -t gb2312 aaa.txt >bbb.txt这个命令读取aaa.txt文件，从utf-8编码转换为gb2312编码,其输出定向到bbb.txt文件。小结: Linux为我们提供了强大的编码转换工具,给我们带来了方便。 
  

 

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