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Annotation of GNUtools/libg++/libio/isgetsb.cc, revision 1.1.1.1

1.1       root        1: /* This is part of libio/iostream, providing -*- C++ -*- input/output.
                      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: #include "iostream.h"
                     27: #include <string.h>
                     28: 
                     29: istream& istream::get(streambuf& sb, char delim /* = '\n' */)
                     30: {
                     31:   _gcount = 0;
                     32:   if (ipfx1())
                     33:     {
                     34:       register streambuf* isb = rdbuf();
                     35:       for (;;)
                     36:        {
                     37:          streamsize len = isb->_IO_read_end - isb->_IO_read_ptr;
                     38:          if (len <= 0)
                     39:            if (__underflow(isb) == EOF)
                     40:              break;
                     41:            else
                     42:              len = isb->_IO_read_end - isb->_IO_read_ptr;
                     43:          char *delimp = (char*)memchr((void*)isb->_IO_read_ptr, delim, len);
                     44:          if (delimp != NULL)
                     45:            len = delimp - isb->_IO_read_ptr;
                     46:          int written = sb.sputn(isb->_IO_read_ptr, len);
                     47:          isb->_IO_read_ptr += written;
                     48:          _gcount += written;
                     49:          if (written != len)
                     50:            {
                     51:              set(ios::failbit);
                     52:              break;
                     53:            }
                     54:          if (delimp != NULL)
                     55:            break;
                     56:        }
                     57:     }
                     58:   return *this;
                     59: }

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