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#include <unistd.h>
#include <stdio.h>
#include <iconv.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
int opt = -1;
char ifile[256], ofile[256], fcharset[32], tcharset[32];
ifile[0] = 0;
ofile[0] = 0;
fcharset[0] = 0;
tcharset[0] = 0;
while((opt = getopt(argc, argv, "i:o:f:t:")) != -1)
{
switch(opt)
{
case 'i':
strcpy(ifile, optarg);
break;
case 'o':
strcpy(ofile, optarg);
break;
case 'f':
strcpy(fcharset, optarg);
break;
case 't':
strcpy(tcharset, optarg);
break;
default:
printf("usage: %s -ioft\n\t-i input file\n\t-o output file\n\t-f from charset\n\t-t to charset\n", argv[0]);
}
}
iconv_t id = iconv_open(tcharset, fcharset);
if((long)id == -1)
{
printf("failed to create iconv descriptor with error: %s\n", strerror(errno));
return 1;
}
FILE *in = fopen(ifile, "r");
if(!in)
{
printf("failed to open input file with error: %s\n", strerror(errno));
return 1;
}
FILE *out = fopen(ofile, "w");
if(!out)
{
printf("failed to open input file with error: %s\n", strerror(errno));
return 1;
}
while(!feof(in))
{
char *buf = (char*)malloc(4096), *outbuf = (char*)malloc(4096), *op, *ip;
op = outbuf;
ip = buf;
if(!fgets(buf, 4096, in))
break;
size_t len = strlen(buf), outlen = 4096;
int enc_len = iconv(id, &ip, &len, &op, &outlen);
if(enc_len == -1)
{
printf("failed to convert buffer with error: %s\n", strerror(errno));
return 1;
}
enc_len = 4096 - outlen;
if((int)fwrite(outbuf, 1, enc_len, out) != enc_len)
{
printf("failed to write data to file with error: %s\n", strerror(errno));
return 1;
}
free(buf);
free(outbuf);
}
return 0;
}
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