[855] | 1 | /**************************************************************************
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| 2 | *
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| 3 | * FileBuf.h -- File buffer
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| 4 | * Copyright (C) 1999 Rodger McNab
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| 5 | *
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| 6 | * This program is free software; you can redistribute it and/or modify
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| 7 | * it under the terms of the GNU General Public License as published by
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| 8 | * the Free Software Foundation; either version 2 of the License, or
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| 9 | * (at your option) any later version.
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| 10 | *
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| 11 | * This program is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, write to the Free Software
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| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 19 | *
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| 20 | **************************************************************************/
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| 21 |
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| 22 | #ifndef FILEBUF_H
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| 23 | #define FILEBUF_H
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| 24 |
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| 25 | #define FILEBUFSIZE 65536
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| 26 |
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| 27 |
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| 28 | class FileBuf {
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| 29 | protected:
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| 30 | unsigned char buf[FILEBUFSIZE];
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| 31 | unsigned char *here;
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| 32 | unsigned char *end;
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| 33 |
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| 34 | int fd;
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| 35 |
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| 36 | // gets a new buffer if need be, returns true if
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| 37 | // more could be got. if true is returned the caller
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| 38 | // can assume that here != end
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| 39 | bool NextBuf ();
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| 40 |
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| 41 | public:
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| 42 | FileBuf ();
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| 43 |
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| 44 | void SetFD (int _fd);
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| 45 |
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| 46 | inline bool Get (unsigned char &c) {
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| 47 | if (here != end || NextBuf()) { c = *here++; return true; }
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| 48 | return false;
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| 49 | }
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| 50 |
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| 51 | inline bool Peek (unsigned char &c) {
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| 52 | if (here != end || NextBuf()) { c = *here; return true; }
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| 53 | return false;
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| 54 | }
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| 55 |
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| 56 | inline bool Next () {
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| 57 | if (here != end || NextBuf()) { here++; return true; }
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| 58 | return false;
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| 59 | }
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| 60 | };
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| 61 |
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| 62 |
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| 63 | #endif
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