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/* Wide printf buffers writing data to a FILE *.
Copyright (C) 2022-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* This implementation is not optimized (unlikely the multibyte
implementation) and always writes to the temporary buffer first. */
#include <printf_buffer_to_file.h>
#include <array_length.h>
#include <libio/libioP.h>
void
__wprintf_buffer_flush_to_file (struct __wprintf_buffer_to_file *buf)
{
size_t count = buf->base.write_ptr - buf->stage;
if ((size_t) _IO_sputn (buf->fp, buf->stage, count) != count)
{
__wprintf_buffer_mark_failed (&buf->base);
return;
}
buf->base.written += count;
buf->base.write_ptr = buf->stage;
}
void
__wprintf_buffer_to_file_init (struct __wprintf_buffer_to_file *buf, FILE *fp)
{
__wprintf_buffer_init (&buf->base, buf->stage, array_length (buf->stage),
__wprintf_buffer_mode_to_file);
buf->fp = fp;
}
int
__wprintf_buffer_to_file_done (struct __wprintf_buffer_to_file *buf)
{
if (__wprintf_buffer_has_failed (&buf->base))
return -1;
__wprintf_buffer_flush_to_file (buf);
return __wprintf_buffer_done (&buf->base);
}
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