50 lines
1.8 KiB
C
Executable File
50 lines
1.8 KiB
C
Executable File
/* Locale dependent memory area transformation for comparison.
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Copyright (C) 2009-2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef AMEMXFRM_H
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#define AMEMXFRM_H
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Generalization of strxfrm() to strings with embedded NUL bytes. */
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/* Transform the memory area [S..S+N-1] to a memory area, in such a way that
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comparing (S1,N1) and (S2,N2) with memcoll() is equivalent to comparing
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amemxfrm(S1,N1) and amemxfrm(S2,N2) with memcmp2().
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The byte S[N] may be temporarily overwritten by this function, but will be
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restored before this function returns.
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The result of this function depends on the LC_COLLATE category of the
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current locale.
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If successful: If resultbuf is not NULL and the result fits into *lengthp
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bytes, it is put in resultbuf, and resultbuf is returned. Otherwise, a
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freshly allocated string is returned. In both cases, *lengthp is set to the
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length of the returned string.
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Upon failure, return NULL, with errno set. */
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extern char * amemxfrm (char *restrict s, size_t n,
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char *restrict resultbuf, size_t *lengthp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* AMEMXFRM_H */
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