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#include <stdio.h>
#include <stdlib.h>
#include <uniconv.h>
#include <assert.h>
#define UCONV_BUFSZ 4096
int main(int argc, char **argv)
{
FILE *infp, *outfp;
const char *from, *to;
char inbuffer[UCONV_BUFSZ + 8];
char outbuffer[UCONV_BUFSZ * 6];
size_t inlen;
uniconv_t *conv;
size_t off;
if (argc < 5)
return -1;
from = argv[1];
to = argv[2];
infp = fopen(argv[3], "rb");
if (!infp)
return -1;
outfp = fopen(argv[4], "wb");
if (!outfp)
return -1;
conv = uniconv_open(from, to);
if (!conv)
return -1;
off = 0;
while (!feof(infp)) {
int ret;
char *inp;
char *outp;
size_t len;
len = inlen = fread(inbuffer, 1, UCONV_BUFSZ, infp);
while (1) {
inp = inbuffer;
outp = outbuffer;
ret = uniconv_conv(conv, (const char **)&inp, inlen, &outp, sizeof(outbuffer));
if (ret == UNICONV_E2BIG && inlen < sizeof(inbuffer)) {
size_t extralen = fread(inbuffer + inlen, 1, 1, infp);
if (!extralen)
break;
len += extralen;
inlen += extralen;
continue;
}
if (ret) {
printf ("Failed to convert.\n");
exit(-1);
break;
}
assert (inp - inbuffer == inlen);
fwrite(outbuffer, 1, outp - outbuffer, outfp);
break;
}
off += len;
}
fclose(outfp);
fclose(infp);
uniconv_close(conv);
return 0;
}
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