iconv 编译在vs2012

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iconv库可以实现文字格式转换，VLC在DVB的SI信息中，字符（如SDT节目名字、提供商，和EIT等）解析显示用到这个库

1.1. 下载 iconv 库并解压,目前最新版本为 1.14
http://ftp.gnu.org/pub/gnu/libiconv/
2. VC6新建win32静态库工程，libIconv。复制iconv库lib文件夹所有文件到工程文件夹下
3. 将config.h.in改名为config.h
4. 将libcharset/lib/localcharset.c复制过来
5. 将include文件夹下iconv.h.in复制过来，改名为iconv.h
6. 将库中scrLib/localcharset.h复制过来
7. 工程属性， C/C++, Preprocssor, Addtional include diretory增加当前文件夹”.”
8. 修改 iconv.h :
a. 删除所有的 @ 符号，
b. 注释掉/DLL_VARIABLE/，
c. ICONV_CONST改为const,
9. 修改localcharset.c：
注释掉 #include “configmake.h”
10. 把有main函数的.c文件删掉

生成libIconv.lib，头文件即iconv.h

#include "iconv.h"#pragma comment(lib, "libIconv.lib")int 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;  }  /*UTF8תΪGB2312*/  std::string u2a(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;  }  /*GB2312תΪUTF8*/  std::string a2u(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;  }

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