#include <stdio.h>
#include <stdlib.h>
#include <iconv.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
int encoding_convert(char *src_chset, char *to_chset, char *src_data, size_t inlen, char *tgt_data, int outlen)
{
iconv_t cd;
int rc;
char **in_buf = &src_data;
char **out_buf = &tgt_data;
size_t conv_len = outlen;
cd = iconv_open(to_chset, src_chset);
if(cd==0)
return -1;
memset(tgt_data, 0, outlen);
if(iconv(cd, in_buf, &inlen, out_buf, &conv_len) == -1)
{
iconv_close(cd);
return -1;
}
iconv_close(cd);
return conv_len;
}
int main(int argc, char *argv[])
{
FILE *fh;
struct stat st;
char *gbk_buf = NULL;
char *utf8_buf = NULL;
if(argc < 2)
printf("\n./PROG file \n");
if(stat(argv[1], &st) != 0)
{
printf("\n stat file error\n");
return -1;
}
if(st.st_size <= 0)
{
printf("\n file size is 0, error\n");
return -1;
}
fh = fopen(argv[1], "rb");
if(fh == NULL)
{
printf("\n open file error\n");
}
gbk_buf = (char *)malloc(st.st_size + 1);
if(gbk_buf == NULL)
{
printf("\nmalloc gbk buf error\n");
return -1;
}
utf8_buf = (char *)malloc(st.st_size * 2 + 1);
if(utf8_buf == NULL)
{
printf("\nmalloc utf buf error\n");
return -1;
}
size_t rlen = fread(gbk_buf, 1, st.st_size, fh);
if(rlen > 0)
{
printf("\nread len:%d \n", rlen);
encoding_convert("gb2312", "utf-8", gbk_buf, rlen, utf8_buf, st.st_size * 2);
printf("\nGBK data:%s \n", gbk_buf);
printf("\nUTF8 data:%s \n", utf8_buf);
}
return 0;
}