UTF-8、GBK等格式互相转换 【Windows/Linux 通用】

UTF-8、GBK等格式互相转换 [Windows/Linux 通用]

#ifdef WIN32
#include <windows.h>
#endif

#ifdef OS_UNIX
#include <iconv.h>
#endif

#if defined(WIN32)
void convert_encoding(const char *input, int from_codepage, int to_codepage, char *output)
{
	int wlen = MultiByteToWideChar(from_codepage, 0, input, -1, NULL, 0);
	if (0 == wlen)
		return;
	wchar_t *wbuf = (wchar_t *)malloc((wlen + 1) * sizeof(wchar_t));
	MultiByteToWideChar(from_codepage, 0, input, -1, wbuf, wlen);
	int len = WideCharToMultiByte(to_codepage, 0, wbuf, -1, NULL, 0, NULL, NULL);
	if (0 == len)
	{
		free(wbuf);
		return;
	}
	WideCharToMultiByte(to_codepage, 0, wbuf, -1, output, len, NULL, NULL);
	free(wbuf);
}
#else
void convert_encoding(const char *input, const char *from_encoding, const char *to_encoding, char *output)
{
	iconv_t cd = iconv_open(to_encoding, from_encoding);
	if (cd == (i