61 lines
1.9 KiB
C
Executable File
61 lines
1.9 KiB
C
Executable File
/* Formatted output to strings.
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Copyright (C) 1999, 2002, 2006-2024 Free Software Foundation, Inc.
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This file is free software.
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It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
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You can redistribute it and/or modify it under either
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- the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3, or (at your
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option) any later version, or
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- the 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, or
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- the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
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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 GNU
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Lesser General Public License and the GNU General Public License
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for more details.
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You should have received a copy of the GNU Lesser General Public
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License and of the GNU General Public License along with this
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program. If not, see <https://www.gnu.org/licenses/>. */
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int
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VSNPRINTF (DCHAR_T *buf, size_t size, const FCHAR_T *format, va_list args)
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{
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size_t length;
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DCHAR_T *result;
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if (size == 0)
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buf = NULL;
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else
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length = size;
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result = VASNPRINTF (buf, &length, format, args);
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if (result == NULL)
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return -1;
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if (result != buf)
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{
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if (size != 0)
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{
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/* The result did not fit into the buffer. Copy the initial segment
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into the buffer, truncating it if necessary. */
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size_t n = (length < size ? length : size - 1);
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DCHAR_CPY (buf, result, n);
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buf[n] = '\0';
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}
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free (result);
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}
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if (length > INT_MAX)
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{
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errno = EOVERFLOW;
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return -1;
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}
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/* Return the number of resulting units, excluding the trailing NUL. */
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return length;
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}
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