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af7f416551
The buffer resizing algorithm is slightly different. The initial buffer is on the stack, and small buffers are directly allocated on the heap using the exact required size. The overhead of the additional copy is compensated by the lowered setup cost for buffers compared to libio streams. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
/* Flush a struct __printf_buffer. Multibyte version.
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Copyright (C) 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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#include <errno.h>
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#include <printf_buffer.h>
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#include "printf_buffer-char.h"
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#include "Xprintf_buffer_flush.c"
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/* The __printf_buffer_flush_* functions are defined together with
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functions that are pulled in by strong references. */
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#ifndef SHARED
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# pragma weak __printf_buffer_flush_snprintf
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# pragma weak __printf_buffer_flush_to_file
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# pragma weak __printf_buffer_flush_asprintf
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# pragma weak __printf_buffer_flush_fp
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# pragma weak __printf_buffer_flush_fp_to_wide
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# pragma weak __printf_buffer_flush_fphex_to_wide
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#endif /* !SHARED */
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static void
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__printf_buffer_do_flush (struct __printf_buffer *buf)
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{
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switch (buf->mode)
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{
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case __printf_buffer_mode_failed:
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case __printf_buffer_mode_sprintf:
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return;
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case __printf_buffer_mode_snprintf:
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__printf_buffer_flush_snprintf ((struct __printf_buffer_snprintf *) buf);
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return;
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case __printf_buffer_mode_sprintf_chk:
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__chk_fail ();
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break;
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case __printf_buffer_mode_to_file:
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__printf_buffer_flush_to_file ((struct __printf_buffer_to_file *) buf);
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return;
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case __printf_buffer_mode_asprintf:
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__printf_buffer_flush_asprintf ((struct __printf_buffer_asprintf *) buf);
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return;
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case __printf_buffer_mode_strfmon:
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__set_errno (E2BIG);
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__printf_buffer_mark_failed (buf);
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return;
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case __printf_buffer_mode_fp:
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__printf_buffer_flush_fp ((struct __printf_buffer_fp *) buf);
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return;
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case __printf_buffer_mode_fp_to_wide:
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__printf_buffer_flush_fp_to_wide
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((struct __printf_buffer_fp_to_wide *) buf);
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return;
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case __printf_buffer_mode_fphex_to_wide:
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__printf_buffer_flush_fphex_to_wide
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((struct __printf_buffer_fphex_to_wide *) buf);
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return;
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}
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__builtin_trap ();
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}
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