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8ece45e4f5
The internal buffer size is set to 2048 bytes. This is less than the original BUFSIZ value used by buffered_vfprintf before the conversion, but it hopefully covers all cases where write boundaries matter. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* Copyright (C) 1995-2022 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 <array_length.h>
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#include <math_ldbl_opt.h>
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#include <printf.h>
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#include <stdio_ext.h>
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#include <unistd.h>
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#include <printf_buffer.h>
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struct __printf_buffer_dprintf
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{
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struct __printf_buffer base;
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int fd;
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char buf[PRINTF_BUFFER_SIZE_DPRINTF];
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};
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void
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__printf_buffer_flush_dprintf (struct __printf_buffer_dprintf *buf)
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{
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char *p = buf->buf;
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char *end = buf->base.write_ptr;
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while (p < end)
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{
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ssize_t ret = TEMP_FAILURE_RETRY (write (buf->fd, p, end - p));
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if (ret < 0)
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{
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__printf_buffer_mark_failed (&buf->base);
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return;
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}
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p += ret;
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}
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buf->base.write_ptr = buf->buf;
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}
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int
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__vdprintf_internal (int d, const char *format, va_list arg,
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unsigned int mode_flags)
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{
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struct __printf_buffer_dprintf buf;
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__printf_buffer_init (&buf.base, buf.buf, array_length (buf.buf),
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__printf_buffer_mode_dprintf);
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buf.fd = d;
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__printf_buffer (&buf.base, format, arg, mode_flags);
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if (__printf_buffer_has_failed (&buf.base))
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return -1;
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__printf_buffer_flush_dprintf (&buf);
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return __printf_buffer_done (&buf.base);
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}
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int
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__vdprintf (int d, const char *format, va_list arg)
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{
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return __vdprintf_internal (d, format, arg, 0);
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}
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ldbl_weak_alias (__vdprintf, vdprintf)
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