Subversion Repositories tendra.SVN

/*
                 Crown Copyright (c) 1997
    
    This TenDRA(r) Computer Program is subject to Copyright
    owned by the United Kingdom Secretary of State for Defence
    acting through the Defence Evaluation and Research Agency
    (DERA).  It is made available to Recipients with a
    royalty-free licence for its use, reproduction, transfer
    to other parties and amendment for any purpose not excluding
    product development provided that any such use et cetera
    shall be deemed to be acceptance of the following conditions:-
    
        (1) Its Recipients shall ensure that this Notice is
        reproduced upon any copies or amended versions of it;
    
        (2) Any amended version of it shall be clearly marked to
        show both the nature of and the organisation responsible
        for the relevant amendment or amendments;
    
        (3) Its onward transfer from a recipient to another
        party shall be deemed to be that party's acceptance of
        these conditions;
    
        (4) DERA gives no warranty or assurance as to its
        quality or suitability for any purpose and DERA accepts
        no liability whatsoever in relation to any use to which
        it may be put.
*/


#ifndef PD_CHUNKS_INCLUDED
#define PD_CHUNKS_INCLUDED

#define DATA_SIZE 256


typedef int Bool;

typedef struct chunk_struct
                { struct chunk_struct *next;
                  short int usage;
                  unsigned char offst; unsigned char aligned;
                  unsigned char data[DATA_SIZE];
                } Chunk;


typedef struct { Chunk * first; Chunk * last;
                 unsigned int no; unsigned int sort;} TDF;

extern TDF * current_TDF;       /* the current output stream */

extern Chunk * create_chunk PROTO_S((void));
extern void out_basic_int PROTO_S((unsigned long num, unsigned int bts)); 
extern void append_TDF PROTO_S((TDF * tdf, Bool free_it));
extern unsigned long bits_in_TDF PROTO_S((TDF *tdf));
extern void out_extendable_int PROTO_S((unsigned long num, unsigned int bts));
extern void out_tdfint32 PROTO_S((unsigned long n));
extern void out_tdfbool PROTO_S((Bool b));
extern void out_tdfstring_bytes PROTO_S((char * s, unsigned int k,
                                        unsigned int n));
extern void out_tdfident_bytes PROTO_S((char *s));
extern void append_bytestream PROTO_S((TDF *tdf, Bool free_it));
extern void byte_align PROTO_S((void));

#include "errors.h"

/* NEW_STREAM creates a new output stream in ptrtoTDF (ie a non-void TDF *)
   for the extent of make_stream, re-instating the original stream after
   make_stream.
*/

#if FS_TENDRA
#pragma TenDRA begin
#pragma TenDRA variable hiding analysis off
#endif


#define NEW_STREAM(ptrtoTDF, make_stream)\
{ TDF * new_hold_;\
  new_hold_ = current_TDF;\
  current_TDF = ptrtoTDF;\
  current_TDF->first = current_TDF->last = create_chunk();\
  make_stream;\
  current_TDF = new_hold_;\
}


/* CONT_STREAM changes the output stream to an existing stream, ptrtoTDF, for
   the extent of make_stream, re-instating the original stream after
   make_stream.
*/

#define CONT_STREAM(ptrtoTDF, make_stream)\
{ TDF * cont_hold_ = current_TDF;\
  current_TDF = ptrtoTDF;\
  make_stream;\
  current_TDF = cont_hold_;\
}


#define TDF_COND(code_, sort_, exp_, arg1, arg2)\
{ TDF new_;\
  code_; exp_; ASSERT_SORT(s_exp);\
  NEW_STREAM(&new_, arg1; ASSERT_SORT(sort_);)\
  out_tdfint32(bits_in_TDF(&new_));\
  append_TDF(&new_,1);\
  NEW_STREAM(&new_, arg2; ASSERT_SORT(sort_);)\
  out_tdfint32(bits_in_TDF(&new_));\
  append_TDF(&new_,1);\
  SET_RSORT(sort_);\
}

#define TDF_LIST(x, sort_)\
{ TDF * list_hold_ = current_TDF;\
  TDF temp_;\
  temp_.last = temp_.first = create_chunk();\
  temp_.no = 0;\
  current_TDF = &temp_;\
  current_TDF->sort = sort_;\
  x; ASSERT_SORT_OR_EMPTY(sort_);\
  current_TDF = list_hold_;\
  out_basic_int(UL(0),UI(1));\
  out_tdfint32(UL(temp_.no));\
  append_TDF(&temp_, 1);\
}

#define TDF_SLIST(x, sort_)\
{ TDF * slist_hold_ = current_TDF;\
  TDF temp_;\
  temp_.last = temp_.first = create_chunk();\
  temp_.no = 0;\
  current_TDF = &temp_;\
  current_TDF->sort = sort_;\
  x; ASSERT_SORT_OR_EMPTY(sort_);\
  current_TDF = slist_hold_;\
  out_tdfint32(UL(temp_.no));\
  append_TDF(&temp_, 1);\
}

#define LIST_ELEM(x)\
{ unsigned int sort_ = current_TDF->sort;\
  x; ASSERT_SORT(sort_);\
  current_TDF->no ++;\
 }

#define TDF_OPTION(x, sort_)\
{ TDF * opt_hold_ = current_TDF;\
  TDF temp_;\
  temp_.last = temp_.first = create_chunk();\
  temp_.no = 0;\
  current_TDF = &temp_;\
  x; ASSERT_SORT_OR_EMPTY(sort_);\
  current_TDF = opt_hold_;\
  Assert(temp_.no<=1);\
  out_basic_int(UL(temp_.no),UI(1));\
  if (temp_.no != 0 ) append_TDF(&temp_,1);\
}


#define OPTION(x)\
{ x; Assert(current_TDF->no==0); current_TDF->no = 1; }

#define TOK_APP(num_, sort_, tok_, pars_)\
{ TDF new_;\
  num_; tok_; ASSERT_SORT(s_token);\
  NEW_STREAM(&new_, pars_)\
  out_tdfint32(bits_in_TDF(&new_));\
  append_TDF(&new_,1);\
  SET_RSORT(sort_);\
}    

#define o_token_def(p_result_sort, p_tok_params, p_body)\
{ TDF new_;\
  NEW_STREAM( & new_,\
        { out_basic_int(UL(1),UI(1));\
          p_result_sort; ASSERT_SORT(s_sortname);\
          TDF_LIST(p_tok_params, s_tokformals);\
          p_body;\
        }\
  )\
  out_tdfint32(bits_in_TDF(&new_));\
  append_TDF(&new_,1);\
  SET_RSORT(s_bitstream);\
}

#if FS_TENDRA
#pragma TenDRA end
#endif


#endif