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 #define READER_TYPE_FILE2 6
  35
  36 #define WRITER_TYPE_FILE 1
  37 #define WRITER_TYPE_MEM  2
  38 #define WRITER_TYPE_ZLIB_C 3
  39 #define WRITER_TYPE_ZLIB_U 4
  40 #define WRITER_TYPE_NULL 5
  41 #define WRITER_TYPE_GROWING_MEM  6
  42 #define WRITER_TYPE_ZLIB WRITER_TYPE_ZLIB_C
  43
  44 typedef struct _reader
  45 {
  46     int (*read)(struct _reader*, void*data, int len);
  47     void (*dealloc)(struct _reader*);
  48
  49     void *internal;
  50     int type;
  51     unsigned char mybyte;
  52     unsigned char bitpos;
  53     int pos;
  54 } reader_t;
  55
  56 typedef struct _writer
  57 {
  58     int (*write)(struct _writer*, void*data, int len);
  59     void (*flush)(struct _writer*);
  60     void (*finish)(struct _writer*);
  61
  62     void *internal;
  63     int type;
  64     unsigned char mybyte;
  65     unsigned char bitpos;
  66     int pos;
  67 } writer_t;
  68
  69 void reader_resetbits(reader_t*r);
  70 unsigned int reader_readbit(reader_t*r);
  71 unsigned int reader_readbits(reader_t*r, int num);
  72
  73 U8 reader_readU8(reader_t*r);
  74 U16 reader_readU16(reader_t*r);
  75 U32 reader_readU32(reader_t*r);
  76 float reader_readFloat(reader_t*r);
  77 double reader_readDouble(reader_t*r);
  78 char*reader_readString(reader_t*r);
  79
  80 void writer_resetbits(writer_t*w);
  81 void writer_writebit(writer_t*w, int bit);
  82 void writer_writebits(writer_t*w, unsigned int data, int bits);
  83
  84 void writer_writeU8(writer_t*w, unsigned char b);
  85 void writer_writeU16(writer_t*w, unsigned short v);
  86 void writer_writeU32(writer_t*w, unsigned long v);
  87 void writer_writeFloat(writer_t*w, float f);
  88 void writer_writeDouble(writer_t*w, double f);
  89 void writer_writeString(writer_t*w, const char*s);
  90
  91 /* standard readers / writers */
  92
  93 void reader_init_filereader(reader_t*r, int handle);
  94 void reader_init_filereader2(reader_t*r, const char*filename);
  95 void reader_init_zlibinflate(reader_t*r, reader_t*input);
  96 void reader_init_memreader(reader_t*r, void*data, int length);
  97 void reader_init_nullreader(reader_t*r);
  98
  99 void writer_init_filewriter(writer_t*w, int handle);
 100 void writer_init_filewriter2(writer_t*w, char*filename);
 101 void writer_init_zlibdeflate(writer_t*w, writer_t*output);
 102 void writer_init_memwriter(writer_t*r, void*data, int length);
 103 void writer_init_nullwriter(writer_t*w);
 104
 105 void writer_init_growingmemwriter(writer_t*r, U32 grow);
 106 void* writer_growmemwrite_memptr(writer_t*w, int*len);
 107 void* writer_growmemwrite_getmem(writer_t*w);
 108 void writer_growmemwrite_reset(writer_t*w);
 109
 110 #endif //__rfxswf_bitio_h__