62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
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/* Implement the snprintf function.
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Copyright (C) 2003-2022 Free Software Foundation, Inc.
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Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
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This file is part of the libiberty library. This library is free
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software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version.
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This 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does not cause
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the resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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/*
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@deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, @
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const char *@var{format}, ...)
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This function is similar to @code{sprintf}, but it will write to
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@var{buf} at most @code{@var{n}-1} bytes of text, followed by a
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terminating null byte, for a total of @var{n} bytes.
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On error the return value is -1, otherwise it returns the number of
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bytes, not including the terminating null byte, that would have been
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written had @var{n} been sufficiently large, regardless of the actual
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value of @var{n}. Note some pre-C99 system libraries do not implement
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this correctly so users cannot generally rely on the return value if
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the system version of this function is used.
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@end deftypefn
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*/
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#include "ansidecl.h"
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#include <stdarg.h>
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#include <stddef.h>
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int vsnprintf (char *, size_t, const char *, va_list);
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int
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snprintf (char *s, size_t n, const char *format, ...)
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{
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int result;
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va_list ap;
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va_start (ap, format);
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result = vsnprintf (s, n, format, ap);
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va_end (ap);
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return result;
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}
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