#ifndef lint
static char rcsid[] = "@(#$Id: transcode.cpp,v 1.3 2005-02-04 14:21:18 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
#ifndef TEST_TRANSCODE
#include <errno.h>
#include <string>
#include <iostream>
using std::string;
#include <iconv.h>
#include "transcode.h"
bool transcode(const string &in, string &out, const string &icode,
const string &ocode)
{
iconv_t ic;
bool ret = false;
const int OBSIZ = 8192;
char obuf[OBSIZ], *op;
bool icopen = false;
out.erase();
size_t isiz = in.length();
out.reserve(isiz);
const char *ip = in.c_str();
if((ic = iconv_open(ocode.c_str(), icode.c_str())) == (iconv_t)-1) {
out = string("iconv_open failed for ") + icode
+ " -> " + ocode;
goto error;
}
icopen = true;
while (isiz > 0) {
size_t osiz;
op = obuf;
osiz = OBSIZ;
if(iconv(ic,
#if defined(_LIBICONV_VERSION)
&ip,
#else
(char **)&ip,
#endif
&isiz, &op, &osiz) == (size_t)-1 && errno != E2BIG){
out.erase();
out = string("iconv failed for ") + icode + " -> " + ocode +
" : " + strerror(errno);
goto error;
}
out.append(obuf, OBSIZ - osiz);
}
if(iconv_close(ic) == -1) {
out.erase();
out = string("iconv_close failed for ") + icode
+ " -> " + ocode;
goto error;
}
icopen = false;
ret = true;
error:
if (icopen)
iconv_close(ic);
return ret;
}
#else
#include <errno.h>
#include <string>
#include <iostream>
#include <unistd.h>
#include <fcntl.h>
using namespace std;
#include "readfile.h"
#include "transcode.h"
int main(int argc, char **argv)
{
if (argc != 5) {
cerr << "Usage: trcsguess ifilename icode ofilename ocode" << endl;
exit(1);
}
const string ifilename = argv[1];
const string icode = argv[2];
const string ofilename = argv[3];
const string ocode = argv[4];
string text;
if (!file_to_string(ifilename, text)) {
cerr << "Couldnt read file, errno " << errno << endl;
exit(1);
}
string out;
if (!transcode(text, out, icode, ocode)) {
cerr << out << endl;
exit(1);
}
int fd = open(ofilename.c_str(), O_CREAT|O_TRUNC|O_WRONLY, 0666);
if (fd < 0) {
perror("Open/create output");
exit(1);
}
if (write(fd, out.c_str(), out.length()) != (int)out.length()) {
perror("write");
exit(1);
}
close(fd);
exit(0);
}
#endif