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Annotation of GNUtools/libg++/libio/iopadn.c, revision 1.1

1.1     ! root        1: /* 
        !             2: Copyright (C) 1993 Free Software Foundation
        !             3: 
        !             4: This file is part of the GNU IO Library.  This library is free
        !             5: software; you can redistribute it and/or modify it under the
        !             6: terms of the GNU General Public License as published by the
        !             7: Free Software Foundation; either version 2, or (at your option)
        !             8: any later version.
        !             9: 
        !            10: This library is distributed in the hope that it will be useful,
        !            11: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            13: GNU General Public License for more details.
        !            14: 
        !            15: You should have received a copy of the GNU General Public License
        !            16: along with GNU CC; see the file COPYING.  If not, write to
        !            17: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
        !            18: 
        !            19: As a special exception, if you link this library with files
        !            20: compiled with a GNU compiler to produce an executable, this does not cause
        !            21: the resulting executable to be covered by the GNU General Public License.
        !            22: This exception does not however invalidate any other reasons why
        !            23: the executable file might be covered by the GNU General Public License. */
        !            24: 
        !            25: #include "libioP.h"
        !            26: 
        !            27: #define PADSIZE 16
        !            28: static char const blanks[PADSIZE] =
        !            29: {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
        !            30: static char const zeroes[PADSIZE] =
        !            31: {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
        !            32: 
        !            33: _IO_ssize_t
        !            34: _IO_padn(fp, pad, count)
        !            35:      _IO_FILE *fp;
        !            36:      int pad;
        !            37:      _IO_ssize_t count;
        !            38: {
        !            39:   char padbuf[PADSIZE];
        !            40:   const char *padptr;
        !            41:   register int i;
        !            42:   _IO_size_t written = 0, w;
        !            43:   
        !            44:   if (pad == ' ')
        !            45:     padptr = blanks;
        !            46:   else if (pad == '0')
        !            47:     padptr = zeroes;
        !            48:   else
        !            49:     {
        !            50:       for (i = PADSIZE; --i >= 0; ) padbuf[i] = pad;
        !            51:       padptr = padbuf;
        !            52:     }
        !            53:   for (i = count; i >= PADSIZE; i -= PADSIZE)
        !            54:     {
        !            55:       w = _IO_sputn(fp, padptr, PADSIZE);
        !            56:       written += w;
        !            57:       if (w != PADSIZE)
        !            58:        return written;
        !            59:     }
        !            60:       
        !            61:   if (i > 0)
        !            62:     {
        !            63:       w = _IO_sputn(fp, padptr, i);
        !            64:       written += w;
        !            65:     }
        !            66:   return written;
        !            67: }

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