VC编译iconv库
iconv库可以实现编码格式转换，默认为Linux版本，如果要在windows下使用，需要在VC下重新编译
1. 下载 iconv 库 http://ftp.gnu.org/pub/gnu/libiconv/ 在这个地址下载想要的版本
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
注：在VS2008中第2步注意
，可以先建立一个空工程，进入工程属性，常规->配置类型->静态库（.lib）
VC6编译的库不能在VS2008下用，要在VS2008重新编译
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
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下面是验证代码（复制自VLC）：
#include <iconv.h>
#include <stdio.h>
#include <stdlib.h>
#pragma comment(lib,"libIconv.lib")
static char *dvbsi_to_gb2312( char*psz_instring, size_t i_length )
{
char *psz_encoding, *psz_stringstart, *psz_outstring, *psz_tmp;
char psz_encbuf[12];
size_t i_in, i_out;
iconv_t iconv_handle;
if( i_length < 1 ) return NULL;
if( psz_instring[0] >= 0x20 )
{
psz_stringstart = psz_instring;
psz_encoding = "ISO_8859-1"; /* should be ISO6937 according tospec,
but this seems to be the one used */
}else switch( psz_instring[0] )
{
case 0x01:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-5";
break;
case 0x02:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-6";
break;
case 0x03:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-7";
break;
case 0x04:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-8";
break;
case 0x05:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-9";
break;
case 0x06:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-10";
break;
case 0x07:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-11";
break;
case 0x08:
psz_stringstart = &psz_instring[1]; /*possibly reserved?*/
psz_encoding = "ISO_8859-12";
break;
case 0x09:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-13";
break;
case 0x0a:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-14";
break;
case 0x0b:
psz_stringstart = &psz_instring[1];
psz_encoding = "ISO_8859-15";
break;
// case 0x10:
// if( i_length < 3 ||psz_instring[1] != '\0' || psz_instring
[2] > 0x0f
// || psz_instring[2]== 0 )
// returnEnsureUTF8(strndup(psz_instring,i_length));
// sprintf( psz_encbuf,"ISO_8859-%d", psz_instring[2] );
// psz_stringstart =&psz_instring[3];
// psz_encoding =psz_encbuf;
// break;
case 0x11:
psz_stringstart = &psz_instring[1];
psz_encoding = "UTF-16";
break;
case 0x12:
psz_stringstart = &psz_instring[1];
psz_encoding = "KSC5601-1987";
break;
case 0x13:
psz_stringstart = &psz_instring[1];
psz_encoding = "GB2312";/*GB-2312-1980 */
break;
case 0x14:
psz_stringstart = &psz_instring[1];
psz_encoding = "BIG-5";
break;
// case 0x15:
// returnEnsureUTF8(strndup(&psz_instring[1],i_length-1));
// break;
default:
/* invalid */
return NULL; // todo EnsureUTF8(strndup(psz_instring,i_length));
}
iconv_handle = iconv_open( "GB2312", psz_encoding );
i_in = i_length - (psz_stringstart - psz_instring );
i_out = i_in * 6;
psz_outstring = psz_tmp = (char*)malloc( i_out * sizeof(char) + 1 );
iconv( iconv_handle, (const char **)&psz_stringstart, &i_in,&psz_tmp, &
i_out );
iconv_close( iconv_handle );
*psz_tmp = '\0';
return psz_outstring;
}
int main()
{
char a[] = {0x11, 0x73, 0xAF, 0x74, 0x03, 0x65, 0xC5, 0x6E, 0x38, 0x00};
char *b = dvbsi_to_gb2312(a, sizeof(a));
printf("%s\r\n", b);
return 0;
}