156 lines
3.5 KiB
C++
156 lines
3.5 KiB
C++
#ifndef lint
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static char rcsid[] = "@(#$Id: transcode.cpp,v 1.6 2006-01-23 13:32:28 dockes Exp $ (C) 2004 J.F.Dockes";
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#endif
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef TEST_TRANSCODE
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#include <errno.h>
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#include <string>
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#include <iostream>
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#ifndef NO_NAMESPACES
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using std::string;
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#endif /* NO_NAMESPACES */
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#include <iconv.h>
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#include "transcode.h"
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#include "debuglog.h"
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#if !defined(_LIBICONV_VERSION)
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#define CHARPP (char **)
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#else
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#define CHARPP
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#endif
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bool transcode(const string &in, string &out, const string &icode,
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const string &ocode)
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{
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iconv_t ic;
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bool ret = false;
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const int OBSIZ = 8192;
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char obuf[OBSIZ], *op;
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bool icopen = false;
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out.erase();
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size_t isiz = in.length();
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out.reserve(isiz);
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const char *ip = in.c_str();
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if((ic = iconv_open(ocode.c_str(), icode.c_str())) == (iconv_t)-1) {
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out = string("iconv_open failed for ") + icode
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+ " -> " + ocode;
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goto error;
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}
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icopen = true;
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while (isiz > 0) {
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size_t osiz;
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op = obuf;
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osiz = OBSIZ;
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int isiz0=isiz;
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if(iconv(ic, CHARPP&ip, &isiz, &op, &osiz) == (size_t)-1 &&
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errno != E2BIG) {
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#if 0
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out.erase();
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out = string("iconv failed for ") + icode + " -> " + ocode +
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" : " + strerror(errno);
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#endif
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if (errno == EILSEQ) {
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LOGDEB(("transcode:iconv: bad input seq.: shift, retry\n"));
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LOGDEB1((" Input consumed %d output produced %d\n",
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ip - in.c_str(), out.length() + OBSIZ - osiz));
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out.append(obuf, OBSIZ - osiz);
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out += "?";
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ip++;isiz--;
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continue;
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}
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goto error;
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}
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out.append(obuf, OBSIZ - osiz);
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}
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if(iconv_close(ic) == -1) {
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out.erase();
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out = string("iconv_close failed for ") + icode
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+ " -> " + ocode;
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goto error;
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}
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icopen = false;
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ret = true;
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error:
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if (icopen)
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iconv_close(ic);
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//fprintf(stderr, "TRANSCODE OUT:\n%s\n", out.c_str());
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return ret;
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}
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#else
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#include <errno.h>
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#include <string>
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#include <iostream>
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#include <unistd.h>
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#include <fcntl.h>
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using namespace std;
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#include "readfile.h"
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#include "transcode.h"
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int main(int argc, char **argv)
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{
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if (argc != 5) {
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cerr << "Usage: trcsguess ifilename icode ofilename ocode" << endl;
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exit(1);
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}
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const string ifilename = argv[1];
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const string icode = argv[2];
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const string ofilename = argv[3];
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const string ocode = argv[4];
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string text;
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if (!file_to_string(ifilename, text)) {
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cerr << "Couldnt read file, errno " << errno << endl;
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exit(1);
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}
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string out;
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if (!transcode(text, out, icode, ocode)) {
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cerr << out << endl;
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exit(1);
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}
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int fd = open(ofilename.c_str(), O_CREAT|O_TRUNC|O_WRONLY, 0666);
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if (fd < 0) {
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perror("Open/create output");
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exit(1);
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}
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if (write(fd, out.c_str(), out.length()) != (int)out.length()) {
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perror("write");
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exit(1);
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}
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close(fd);
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exit(0);
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}
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#endif
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