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56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* Wide printf buffers writing data to a FILE *.
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Copyright (C) 2022-2024 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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/* This implementation is not optimized (unlikely the multibyte
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implementation) and always writes to the temporary buffer first. */
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#include <printf_buffer_to_file.h>
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#include <array_length.h>
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#include <libio/libioP.h>
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void
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__wprintf_buffer_flush_to_file (struct __wprintf_buffer_to_file *buf)
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{
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size_t count = buf->base.write_ptr - buf->stage;
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if ((size_t) _IO_sputn (buf->fp, buf->stage, count) != count)
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{
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__wprintf_buffer_mark_failed (&buf->base);
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return;
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}
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buf->base.written += count;
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buf->base.write_ptr = buf->stage;
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}
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void
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__wprintf_buffer_to_file_init (struct __wprintf_buffer_to_file *buf, FILE *fp)
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{
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__wprintf_buffer_init (&buf->base, buf->stage, array_length (buf->stage),
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__wprintf_buffer_mode_to_file);
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buf->fp = fp;
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}
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int
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__wprintf_buffer_to_file_done (struct __wprintf_buffer_to_file *buf)
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{
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if (__wprintf_buffer_has_failed (&buf->base))
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return -1;
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__wprintf_buffer_flush_to_file (buf);
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return __wprintf_buffer_done (&buf->base);
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}
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