Mercurial > gnulib
view lib/uniconv/u-strconv-to-enc.h @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
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/* Conversion from UTF-16/UTF-32 to legacy encodings. Copyright (C) 2002, 2006-2007, 2009-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ char * FUNC (const UNIT *string, const char *tocode, enum iconv_ilseq_handler handler) { #if HAVE_UTF_NAME char *result = NULL; size_t length = 0; if (mem_iconveha ((const char *) string, (U_STRLEN (string) + 1) * sizeof (UNIT), UTF_NAME, tocode, handler == iconveh_question_mark, handler, NULL, &result, &length) < 0) return NULL; /* Verify the result has exactly one NUL byte, at the end. */ if (!(length > 0 && result[length-1] == '\0' && strlen (result) == length-1)) { free (result); errno = EILSEQ; return NULL; } return result; #else uint8_t tmpbuf[4096]; size_t tmpbufsize = SIZEOF (tmpbuf); uint8_t *utf8_string; char *result; utf8_string = U_TO_U8 (string, U_STRLEN (string) + 1, tmpbuf, &tmpbufsize); if (utf8_string == NULL) return NULL; result = u8_strconv_to_encoding (utf8_string, tocode, handler); if (result == NULL) { if (utf8_string != tmpbuf) { int saved_errno = errno; free (utf8_string); errno = saved_errno; } return NULL; } if (utf8_string != tmpbuf) free (utf8_string); return result; #endif }