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[swftools.git] / lib / bitio.h
1 /* bitio.h
2    Generic object-oriented reading/writing.
3
4    Part of the swftools package.
5    
6    Copyright (c) 2001 Matthias Kramm <kramm@quiss.org> 
7  
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
21
22 #include <stdio.h>
23 #include "types.h"
24
25 #ifndef __rfxswf_bitio_h__
26 #define __rfxswf_bitio_h__
27
28 #define READER_TYPE_FILE 1
29 #define READER_TYPE_MEM  2
30 #define READER_TYPE_ZLIB_U 3
31 #define READER_TYPE_ZLIB_C 4
32 #define READER_TYPE_ZLIB READER_TYPE_ZLIB_U
33 #define READER_TYPE_NULL 5
34
35 #define WRITER_TYPE_FILE 1
36 #define WRITER_TYPE_MEM  2
37 #define WRITER_TYPE_ZLIB_C 3
38 #define WRITER_TYPE_ZLIB_U 4
39 #define WRITER_TYPE_NULL 5
40 #define WRITER_TYPE_GROWING_MEM  6
41 #define WRITER_TYPE_ZLIB WRITER_TYPE_ZLIB_C
42
43 typedef struct _reader
44 {
45     int (*read)(struct _reader*, void*data, int len);
46     void (*dealloc)(struct _reader*);
47
48     void *internal;
49     int type;
50     unsigned char mybyte;
51     unsigned char bitpos;
52     int pos;
53 } reader_t;
54
55 typedef struct _writer
56 {
57     int (*write)(struct _writer*, void*data, int len);
58     void (*finish)(struct _writer*);
59
60     void *internal;
61     int type;
62     unsigned char mybyte;
63     unsigned char bitpos;
64     int pos;
65 } writer_t;
66
67 void reader_resetbits(reader_t*r);
68 unsigned int reader_readbit(reader_t*r);
69 unsigned int reader_readbits(reader_t*r, int num);
70
71 U8 reader_readU8(reader_t*r);
72 U16 reader_readU16(reader_t*r);
73 U32 reader_readU32(reader_t*r);
74 float reader_readFloat(reader_t*r);
75 double reader_readDouble(reader_t*r);
76 char*reader_readString(reader_t*r);
77
78 void writer_resetbits(writer_t*w);
79 void writer_writebit(writer_t*w, int bit);
80 void writer_writebits(writer_t*w, unsigned int data, int bits);
81
82 void writer_writeU8(writer_t*w, unsigned char b);
83 void writer_writeU16(writer_t*w, unsigned short v);
84 void writer_writeU32(writer_t*w, unsigned long v);
85 void writer_writeFloat(writer_t*w, float f);
86 void writer_writeDouble(writer_t*w, double f);
87 void writer_writeString(writer_t*w, const char*s);
88
89 /* standard readers / writers */
90
91 void reader_init_filereader(reader_t*r, int handle);
92 void reader_init_zlibinflate(reader_t*r, reader_t*input);
93 void reader_init_memreader(reader_t*r, void*data, int length);
94 void reader_init_nullreader(reader_t*r);
95
96 void writer_init_filewriter(writer_t*w, int handle);
97 void writer_init_filewriter2(writer_t*w, char*filename);
98 void writer_init_zlibdeflate(writer_t*w, writer_t*output);
99 void writer_init_memwriter(writer_t*r, void*data, int length);
100 void writer_init_nullwriter(writer_t*w);
101
102 void writer_init_growingmemwriter(writer_t*r, U32 grow);
103 void* writer_growmemwrite_memptr(writer_t*w, int*len);
104 void* writer_growmemwrite_getmem(writer_t*w);
105 void writer_growmemwrite_reset(writer_t*w);
106
107 #endif //__rfxswf_bitio_h__