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2b766585f9
[BZ #11741] Fixed bug where printf and family may return a spurious success when printing padded formats.
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* Copyright (C) 1993-2012 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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<http://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 "libioP.h"
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#define PADSIZE 16
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static char const blanks[PADSIZE] =
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{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
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static char const zeroes[PADSIZE] =
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{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
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_IO_ssize_t
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_IO_padn (fp, pad, count)
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_IO_FILE *fp;
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int pad;
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_IO_ssize_t count;
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{
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char padbuf[PADSIZE];
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const char *padptr;
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int i;
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_IO_size_t written = 0;
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_IO_size_t w;
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if (pad == ' ')
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padptr = blanks;
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else if (pad == '0')
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padptr = zeroes;
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else
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{
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for (i = PADSIZE; --i >= 0; )
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padbuf[i] = pad;
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padptr = padbuf;
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}
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for (i = count; i >= PADSIZE; i -= PADSIZE)
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{
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w = _IO_sputn (fp, padptr, PADSIZE);
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written += w;
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if (w != PADSIZE)
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return w == EOF ? w : written;
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}
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if (i > 0)
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{
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w = _IO_sputn (fp, padptr, i);
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written += w;
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}
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return written;
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}
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libc_hidden_def (_IO_padn)
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