50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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* Copyright (C) 2001 Edmund Grimley Evans <edmundo@rano.org>
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef HAVE_ICONV
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/*
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* Convert data from one encoding to another. Return:
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*
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* -2 : memory allocation failed
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* -1 : unknown encoding
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* 0 : data was converted exactly
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* 1 : data was converted inexactly
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* 2 : data was invalid (but still converted)
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*
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* We convert in two steps, via UTF-8, as this is the only
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* reliable way of distinguishing between invalid input
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* and valid input which iconv refuses to transliterate.
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* We convert from UTF-8 twice, because we have no way of
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* knowing whether the conversion was exact if iconv returns
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* E2BIG (due to a bug in the specification of iconv).
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* An alternative approach is to assume that the output of
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* iconv is never more than 4 times as long as the input,
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* but I prefer to avoid that assumption if possible.
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*/
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int iconvert(const char *fromcode, const char *tocode,
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const char *from, size_t fromlen,
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char **to, size_t *tolen) ;
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#endif /* HAVE_ICONV */
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