[3365] | 1 | /**************************************************************************
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| 2 | *
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| 3 | * bitio_m_stdio.h -- Macros for bitio to a file
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| 4 | * Copyright (C) 1994 Neil Sharman
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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 | * This file contains macros for doing bitwise input and output on a FILE*.
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| 23 | * With these routines you cannot mix reads and writes on the FILE,
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| 24 | * or multiple writes, at the same time and guarantee them to work, also you
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| 25 | * cannot seek to a point and do a write. The decode routine can detect when
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| 26 | * you run off the end of the file and will produce an approate error message.
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| 27 | *
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| 28 | *
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| 29 | **************************************************************************/
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| 30 |
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| 31 | #ifndef H_BITIO_M_STDIO
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| 32 | #define H_BITIO_M_STDIO
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| 33 |
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| 34 | #include "bitio_m_abstract.h"
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| 35 |
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| 36 |
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| 37 | class stdio_bitio_buffer : public bitio_buffer {
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| 38 | protected:
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| 39 | FILE *file;
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| 40 | unsigned char buffer;
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| 41 | unsigned char btg;
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| 42 | unsigned long bytesWritten;
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| 43 |
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| 44 | public:
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| 45 | stdio_bitio_buffer (FILE *f = NULL);
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| 46 |
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| 47 | void attachFile (FILE *f);
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| 48 |
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| 49 | unsigned char GetBtg () { return btg; }
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| 50 | unsigned long GetBytesWritten () { return bytesWritten; }
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| 51 |
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| 52 | void seek (unsigned long byte, unsigned char bit);
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| 53 | void seek (unsigned long topos);
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| 54 | void error();
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| 55 | long add00(long b);
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| 56 | long addff(long b);
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| 57 | int bit();
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| 58 | int bitOffset() { return btg; }
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| 59 | void done();
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| 60 |
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| 61 | void encodeStart();
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| 62 | void encodeBit(int bit);
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| 63 | void encodeDone();
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| 64 | };
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| 65 |
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| 66 |
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| 67 | /*#define ENCODE_START(f) \
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| 68 | { \
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| 69 | stdio_bitio_buffer buffer(f); \
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| 70 | buffer.encodeStart();
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| 71 |
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| 72 | #define ENCODE_CONTINUE(b) \
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| 73 | { \
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| 74 | stdio_bitio_buffer buffer; \
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| 75 | buffer.unpause(b);
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| 76 |
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| 77 | #define ENCODE_PAUSE(b) buffer.pause(&b);}
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| 78 |
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| 79 | #define ENCODE_DONE buffer.encodeDone();}
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| 80 |
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| 81 | #define DECODE_START(f) \
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| 82 | { \
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| 83 | stdio_bitio_buffer buffer(f);
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| 84 |
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| 85 | #define DECODE_CONTINUE(b) \
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| 86 | { \
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| 87 | stdio_bitio_buffer buffer; \
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| 88 | buffer.unpause(b);
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| 89 |
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| 90 | #define DECODE_ADD_FF(b) b = buffer.addff(b)
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| 91 |
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| 92 | #define DECODE_ADD_00(b) b = buffer.add00(b)
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| 93 |
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| 94 | #define DECODE_BIT buffer.bit()
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| 95 |
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| 96 | #define DECODE_DONE buffer.done();}
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| 97 |
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| 98 | #define DECODE_PAUSE(b) buffer.pause(&b);}
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| 99 | */
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| 100 |
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| 101 | #endif
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