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67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/* Copyright (C) 1994-2024 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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As a special exception, if you link the code in this file with
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files compiled with a GNU compiler to produce an executable,
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that does not cause the resulting executable to be covered by
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the GNU Lesser General Public License. This exception does not
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however invalidate any other reasons why the executable file
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might be covered by the GNU Lesser General Public License.
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This exception applies to code released by its copyright holders
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in files containing the exception. */
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#include <errno.h>
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#include <math_ldbl_opt.h>
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#include <printf.h>
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#include <printf_buffer.h>
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int
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__vswprintf_internal (wchar_t *string, size_t maxlen, const wchar_t *format,
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va_list args, unsigned int mode_flags)
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{
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if (maxlen == 0)
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/* Since we have to write at least the terminating L'\0' a buffer
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length of zero always makes the function fail. */
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return -1;
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struct __wprintf_buffer buf;
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__wprintf_buffer_init (&buf, string, maxlen, __wprintf_buffer_mode_swprintf);
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__wprintf_buffer (&buf, format, args, mode_flags);
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if (buf.write_ptr == buf.write_end)
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{
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/* Buffer has been filled exactly, excluding the null wide
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character. This is an error because the null wide character
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is required. */
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buf.write_end[-1] = L'\0';
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return -1;
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}
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buf.write_ptr[0] = L'\0';
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return __wprintf_buffer_done (&buf);
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}
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int
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__vswprintf (wchar_t *string, size_t maxlen, const wchar_t *format,
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va_list args)
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{
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return __vswprintf_internal (string, maxlen, format, args, 0);
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}
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ldbl_weak_alias (__vswprintf, vswprintf)
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