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52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* Copyright (C) 1993-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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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 _LIBC
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# include <string.h>
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#else
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# include <sys/types.h>
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#endif
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#ifndef STPNCPY
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# ifdef weak_alias
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# define STPNCPY __stpncpy
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weak_alias (__stpncpy, stpncpy)
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# else
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# define STPNCPY stpncpy
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# endif
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#endif
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/* Copy no more than N characters of SRC to DEST, returning the address of
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the terminating '\0' in DEST, if any, or else DEST + N. */
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char *
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STPNCPY (char *dest, const char *src, size_t n)
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{
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size_t size = __strnlen (src, n);
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memcpy (dest, src, size);
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dest += size;
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if (size == n)
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return dest;
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return memset (dest, '\0', n - size);
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}
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#ifdef weak_alias
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libc_hidden_def (__stpncpy)
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#endif
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