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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 15:56:06 $
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$Revision: 1.1.1.1 $
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$Log: spec.c,v $
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* Revision 1.1.1.1 1998/01/17 15:56:06 release
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* First version to be checked into rolling release.
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*
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* Revision 1.1 1995/04/13 09:08:06 currie
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* Initial revision
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*
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***********************************************************************/
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/**********************************************************************
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spec.c
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Defines special_fn which recognises and replaces some special
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function calls.
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**********************************************************************/
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#include "config.h"
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#include "common_types.h"
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#include "tags.h"
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#include "externs.h"
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#include "expmacs.h"
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#include "shapemacs.h"
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#include "exp.h"
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#include "basicread.h"
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#include "flags.h"
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#include "table_fns.h"
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#include "installglob.h"
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#include "spec.h"
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speci special_fn
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PROTO_N ( (a1, a2, s) )
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PROTO_T ( exp a1 X exp a2 X shape s )
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{ /* look for special functions */
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speci spr;
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dec* dp = brog (son (a1));
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char *id = dp -> dec_u.dec_val.dec_id;
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spr.is_special = 0;
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if (id == (char *) 0)
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return (spr);
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/* at present the detection of special cases is done on the identifiers,
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but it really ought to be on special tokens, as for diagnostics */
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if (!strcmp (id, "setjmp"))
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has_setjmp = 1;
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if (a2 != nilexp && last(a2) && ( (do_alloca && !strcmp (id, "alloca"))
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|| !strcmp (id, "__builtin_alloca"))) {
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exp r = getexp (s, nilexp, 0, a2, nilexp, 0,
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(long) 0, alloca_tag);
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setfather(r, son(r));
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has_alloca = 1;
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spr.is_special = 1;
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spr.special_exp = r;
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kill_exp (a1, a1);
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return (spr);
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};
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return (spr);
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}
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