Return to indstream.cc CVS log

Up to [Apple XNU] / GNUtools / libg++ / libio

Annotation of GNUtools/libg++/libio/indstream.cc, revision 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: Written by Per Bothner ([email protected]). */
        !            26: 
        !            27: #ifdef __GNUG__
        !            28: #pragma implementation
        !            29: #endif
        !            30: 
        !            31: #include <indstream.h>
        !            32: 
        !            33: indirectbuf::indirectbuf(streambuf *get, streambuf *put, int delete_mode)
        !            34: : streambuf()
        !            35: {
        !            36:     _get_stream = get;
        !            37:     _put_stream = put == NULL ? get : put;
        !            38:     _delete_flags = delete_mode;
        !            39: }
        !            40: 
        !            41: indirectbuf::~indirectbuf()
        !            42: {
        !            43:     if (_delete_flags & ios::in)  delete get_stream();
        !            44:     if (_delete_flags & ios::out)  delete put_stream();
        !            45: }
        !            46: 
        !            47: int indirectbuf::xsputn(const char* s, int n)
        !            48: {
        !            49:     return put_stream()->sputn(s, n);
        !            50: }
        !            51: 
        !            52: int indirectbuf::xsgetn(char* s, int n)
        !            53: {
        !            54:     return get_stream()->sgetn(s, n);
        !            55: }
        !            56: 
        !            57: int indirectbuf::overflow(int c /* = EOF */)
        !            58: {
        !            59:     if (c == EOF)
        !            60:        return put_stream()->overflow(c);
        !            61:     else
        !            62:        return put_stream()->sputc(c);
        !            63: }
        !            64: 
        !            65: int indirectbuf::underflow()
        !            66: {
        !            67:     return get_stream()->sbumpc();
        !            68: }
        !            69: 
        !            70: streampos indirectbuf::seekoff(streamoff off, _seek_dir dir, int mode)
        !            71: {
        !            72:     int ret_val = 0;
        !            73:     int select = mode == 0 ? (ios::in|ios::out) : mode;
        !            74:     streambuf *gbuf = (select & ios::in) ? get_stream() : NULL;
        !            75:     streambuf *pbuf = (select & ios::out) ? put_stream() : NULL;
        !            76:     if (gbuf == pbuf)
        !            77:        ret_val = gbuf->seekoff(off, dir, mode);
        !            78:     else {
        !            79:        if (gbuf)
        !            80:            ret_val = gbuf->seekoff(off, dir, ios::in);
        !            81:        if (pbuf && ret_val != EOF)
        !            82:            ret_val = pbuf->seekoff(off, dir, ios::out);
        !            83:     }
        !            84:     return ret_val;
        !            85: }
        !            86: 
        !            87: streampos indirectbuf::seekpos(streampos pos, int mode)
        !            88: {
        !            89:     int ret_val = EOF;
        !            90:     int select = mode == 0 ? (ios::in|ios::out) : mode;
        !            91:     streambuf *gbuf = (select & ios::in) ? get_stream() : NULL;
        !            92:     streambuf *pbuf = (select & ios::out) ? put_stream() : NULL;
        !            93:     if (gbuf == pbuf)
        !            94:        ret_val = gbuf->seekpos(pos, mode);
        !            95:     else {
        !            96:        if (gbuf)
        !            97:            ret_val = gbuf->seekpos(pos, ios::in);
        !            98:        if (pbuf && ret_val != EOF)
        !            99:            ret_val = pbuf->seekpos(pos, ios::out);
        !           100:     }
        !           101:     return ret_val;
        !           102: }
        !           103: 
        !           104: int indirectbuf::sync()
        !           105: {
        !           106:   streambuf *gbuf = get_stream();
        !           107:   int get_ret_val = gbuf ? gbuf->sync() : 0;
        !           108:   streambuf *pbuf = put_stream();
        !           109:   int put_ret_val = (pbuf && pbuf != gbuf) ?  pbuf->sync() : 0;
        !           110:   return get_ret_val || put_ret_val;
        !           111: }
        !           112: 
        !           113: int indirectbuf::pbackfail(int c)
        !           114: {
        !           115:     return get_stream()->sputbackc(c);
        !           116: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.