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Diffstat (limited to 'libio/iopadn.c')
-rw-r--r-- | libio/iopadn.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/libio/iopadn.c b/libio/iopadn.c new file mode 100644 index 0000000000..94166a3eb1 --- /dev/null +++ b/libio/iopadn.c @@ -0,0 +1,65 @@ +/* +Copyright (C) 1993 Free Software Foundation + +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 GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 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 +DEFUN(_IO_padn, (fp, pad, count), + _IO_FILE *fp AND int pad AND _IO_ssize_t count) +{ + char padbuf[PADSIZE]; + const char *padptr; + register int i; + _IO_size_t written = 0, 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; +} |