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Diffstat (limited to 'libio/iopadn.c')
-rw-r--r-- | libio/iopadn.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/libio/iopadn.c b/libio/iopadn.c new file mode 100644 index 0000000..087715b --- /dev/null +++ b/libio/iopadn.c @@ -0,0 +1,70 @@ +/* Copyright (C) 1993, 1997 Free Software Foundation, Inc. + This file is part of the GNU IO Library. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This 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 + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this library; see the file COPYING. If not, write to + the Free Software Foundation, 59 Temple Place - Suite 330, Boston, + MA 02111-1307, USA. + + As a special exception, if you link this library with files + compiled with a GNU compiler to produce an executable, this does + not cause the resulting executable to be covered by the GNU General + Public License. This exception does not however invalidate any + other reasons why the executable file might be covered by the GNU + General Public License. */ + +#include "libioP.h" + +#define PADSIZE 16 +static char const blanks[PADSIZE] = +{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; +static char const zeroes[PADSIZE] = +{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; + +_IO_ssize_t +_IO_padn (fp, pad, count) + _IO_FILE *fp; + int pad; + _IO_ssize_t count; +{ + char padbuf[PADSIZE]; + const char *padptr; + int i; + _IO_size_t written = 0; + _IO_size_t w; + + if (pad == ' ') + padptr = blanks; + else if (pad == '0') + padptr = zeroes; + else + { + for (i = PADSIZE; --i >= 0; ) + padbuf[i] = pad; + padptr = padbuf; + } + for (i = count; i >= PADSIZE; i -= PADSIZE) + { + w = _IO_sputn (fp, padptr, PADSIZE); + written += w; + if (w != PADSIZE) + return written; + } + + if (i > 0) + { + w = _IO_sputn (fp, padptr, i); + written += w; + } + return written; +} |