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/*
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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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/**********************************************************************
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$Author: release $
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$Date: 1998/01/17 15:55:46 $
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$Revision: 1.1.1.1 $
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$Log: aldefs.c,v $
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* Revision 1.1.1.1 1998/01/17 15:55:46 release
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* First version to be checked into rolling release.
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*
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* Revision 1.1 1995/04/06 10:44:05 currie
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* Initial revision
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*
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***********************************************************************/
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#include "config.h"
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#include "common_types.h"
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#include "installglob.h"
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#include "basicread.h"
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#include "messages_c.h"
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#include "aldefs.h"
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#define max(x,y) ((x)>(y)) ? (x) : (y)
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/* The alignment definitions form a set of simultaneous equations
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of the form
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a1 = f1(a1,a2 .. an)
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a2 = f2(a1,a2 ... an)
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...
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The functions f1 f2 etc. are formed entirely from f_alignment,
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which takes a shape and delivers an alignment, and unite_sets.
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f_alignment provides constants. Since the representation of
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alignments must be a homomorphism of sets under unite_sets, and
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since any program contains a finite number of basic alignments,
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these equations can be solved by iterating unite_sets until
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no further change occurs. Unite_sets is represented here by max.
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*/
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/* PROCEDURES */
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void process_aldefs
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PROTO_Z ()
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{
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aldef * my_aldef;
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int changed; /* records whether a change has been made */
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int complete;
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do /* iterate max until no change */
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{
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my_aldef = top_aldef;
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changed = 0;
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complete = 1;
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while (my_aldef != (aldef *)0)
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{
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switch (my_aldef -> al.al_n)
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{
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case 1: break;
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case 2: {
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alignment a1;
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alignment a2;
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a2 = my_aldef -> al.al_val.al_join.b;
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a1 = my_aldef -> al.al_val.al_join.a;
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if (a1->al.al_n == 1 && a2->al.al_n == 1)
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{
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my_aldef -> al.al_n = 1;
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my_aldef -> al.al_val.al =
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max(a1->al.al_val.al, a2->al.al_val.al);
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changed = 1;
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}
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else
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complete = 0;
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break;
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};
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case 3: {
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alignment a1;
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a1 = my_aldef -> al.al_val.al_join.a;
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if (a1->al.al_n == 1)
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{
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my_aldef -> al.al_n = 1;
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my_aldef -> al.al_val.al = a1->al.al_val.al;
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changed = 1;
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}
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else
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complete = 0;
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break;
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};
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default: failer(ILLEGAL_ALIGNMENT);
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};
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my_aldef = my_aldef -> next_aldef;
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};
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} while (changed) ;
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if (!complete)
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failer(INCOMPLETE_ALIGNMENT_EQS);
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return;
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}
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