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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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#ifndef ENCODE_INCLUDED
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#define ENCODE_INCLUDED
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/*
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BITSTREAM ENCODING DECLARATIONS
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The routines in this module are concerned with low level output.
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*/
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extern BITSTREAM *start_bitstream PROTO_S ( ( FILE *, gen_ptr ) ) ;
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extern void end_bitstream PROTO_S ( ( BITSTREAM *, int ) ) ;
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extern BITSTREAM *enc_bits PROTO_S ( ( BITSTREAM *, unsigned, unsigned ) ) ;
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extern BITSTREAM *enc_long_bits PROTO_S ( ( BITSTREAM *, unsigned, unsigned long ) ) ;
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extern BITSTREAM *enc_bytes PROTO_S ( ( BITSTREAM *, unsigned long, string ) ) ;
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extern BITSTREAM *enc_ascii PROTO_S ( ( BITSTREAM *, unsigned long, string ) ) ;
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extern BITSTREAM *enc_extn PROTO_S ( ( BITSTREAM *, unsigned, unsigned ) ) ;
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extern BITSTREAM *enc_int PROTO_S ( ( BITSTREAM *, unsigned long ) ) ;
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extern BITSTREAM *enc_int_aux PROTO_S ( ( BITSTREAM *, unsigned long ) ) ;
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extern BITSTREAM *enc_ident PROTO_S ( ( BITSTREAM *, string, unsigned long ) ) ;
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extern BITSTREAM *enc_tdfstring PROTO_S ( ( BITSTREAM *, unsigned long, string ) ) ;
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extern BITSTREAM *enc_ustring PROTO_S ( ( BITSTREAM *, string ) ) ;
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extern BITSTREAM *enc_boundary PROTO_S ( ( BITSTREAM * ) ) ;
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extern BITSTREAM *enc_bitstream PROTO_S ( ( BITSTREAM *, BITSTREAM * ) ) ;
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extern BITSTREAM *join_bitstreams PROTO_S ( ( BITSTREAM *, BITSTREAM * ) ) ;
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extern unsigned length_bitstream PROTO_S ( ( BITSTREAM * ) ) ;
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/*
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BITSTREAM SIZES
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These macros give the number of bits in a byte and the number of
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bytes in a bitstream.
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*/
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#define BYTE_SIZE ( ( unsigned ) 8 )
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#define CHUNK_SIZE ( ( unsigned ) 64 )
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#define CHUNK_COPY ( ( unsigned ) 8 )
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#define BYTE_MASK ( ( unsigned ) 0xff )
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/*
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ENCODING MACROS
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These macros give shorthands for the main encoding routines which are
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used in this module. Note that A is used at least twice in each
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definition.
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*/
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#define ENC_BITS( A, B, C )\
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( A ) = enc_bits ( ( A ), ( unsigned ) ( B ), ( unsigned ) ( C ) )
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#define ENC_BITS_2( A, B, C )\
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( A ) = enc_long_bits ( ( A ), ( unsigned ) ( B ), ( ulong ) ( C ) )
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#define ENC_EXTN( A, B, C )\
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( A ) = enc_extn ( ( A ), ( unsigned ) ( B ), ( unsigned ) ( C ) )
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#define ENC_INT( A, B )\
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( A ) = enc_int ( ( A ), ( unsigned long ) ( B ) )
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#define ENC_IDENT( A, B, C )\
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( A ) = enc_ident ( ( A ), ( B ), ( unsigned long ) ( C ) )
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#define ENC_ALIGN( A )\
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( A ) = enc_boundary ( ( A ) )
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#define ENC_BOOL( A, B ) ENC_BITS ( A, 1, B )
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#define ENC_ON( A ) ENC_BITS ( A, 1, 1 )
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#define ENC_OFF( A ) ENC_BITS ( A, 1, 0 )
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#define ENC_OFFS( A, B ) ENC_BITS ( A, B, 0 )
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#endif
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