home *** CD-ROM | disk | FTP | other *** search
- /*-
- * Copyright (c) 1980 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)flvalue.c 5.2 (Berkeley) 4/16/91";
- #endif /* not lint */
-
- #include "whoami.h"
- #include "0.h"
- #include "tree.h"
- #include "opcode.h"
- #include "objfmt.h"
- #include "tree_ty.h"
- #ifdef PC
- # include "pc.h"
- # include <pcc.h>
- #endif PC
- #include "tmps.h"
-
- /*
- * flvalue generates the code to either pass on a formal routine,
- * or construct the structure which is the environment for passing.
- * it tells the difference by looking at the tree it's given.
- */
- struct nl *
- flvalue( r , formalp )
- struct tnode *r; /* T_VAR */
- struct nl *formalp;
- {
- struct nl *p;
- struct nl *tempnlp;
- char *typename;
- #ifdef PC
- char extname[ BUFSIZ ];
- #endif PC
-
- if ( r == TR_NIL ) {
- return NLNIL;
- }
- typename = formalp -> class == FFUNC ? "function":"procedure";
- if ( r->tag != T_VAR ) {
- error("Expression given, %s required for %s parameter %s" ,
- typename , typename , formalp -> symbol );
- return NLNIL;
- }
- p = lookup(r->var_node.cptr);
- if (p == NLNIL) {
- return NLNIL;
- }
- switch ( p -> class ) {
- case FFUNC:
- case FPROC:
- if ( r->var_node.qual != TR_NIL ) {
- error("Formal %s %s cannot be qualified" ,
- typename , p -> symbol );
- return NLNIL;
- }
- # ifdef OBJ
- (void) put(2, PTR_RV | bn << 8+INDX, (int)p->value[NL_OFFS]);
- # endif OBJ
- # ifdef PC
- putRV( p -> symbol , bn , p -> value[ NL_OFFS ] ,
- p -> extra_flags ,
- p2type( p ) );
- # endif PC
- return p;
- case FUNC:
- case PROC:
- if ( r->var_node.qual != TR_NIL ) {
- error("%s %s cannot be qualified" , typename ,
- p -> symbol );
- return NLNIL;
- }
- if (bn == 0) {
- error("Built-in %s %s cannot be passed as a parameter" ,
- typename , p -> symbol );
- return NLNIL;
- }
- /*
- * allocate space for the thunk
- */
- tempnlp = tmpalloc((long) (sizeof(struct formalrtn)), NLNIL, NOREG);
- # ifdef OBJ
- (void) put(2 , O_LV | cbn << 8 + INDX ,
- (int)tempnlp -> value[ NL_OFFS ] );
- (void) put(2, O_FSAV | bn << 8, (long)p->value[NL_ENTLOC]);
- # endif OBJ
- # ifdef PC
- putleaf( PCC_ICON , 0 , 0 ,
- PCCM_ADDTYPE( PCCTM_PTR , PCCM_ADDTYPE( PCCTM_FTN , PCCTM_PTR|PCCT_STRTY ) ) ,
- "_FSAV" );
- sprintf( extname , "%s" , FORMALPREFIX );
- sextname( &extname[ strlen( extname ) ] ,
- p -> symbol , bn );
- putleaf( PCC_ICON , 0 , 0 , p2type( p ) , extname );
- putleaf( PCC_ICON , bn , 0 , PCCT_INT , (char *) 0 );
- putop( PCC_CM , PCCT_INT );
- putLV( (char *) 0 , cbn , tempnlp -> value[NL_OFFS] ,
- tempnlp -> extra_flags , PCCT_STRTY );
- putop( PCC_CM , PCCT_INT );
- putop( PCC_CALL , PCCTM_PTR | PCCT_STRTY );
- # endif PC
- return p;
- default:
- error("Variable given, %s required for %s parameter %s" ,
- typename , typename , formalp -> symbol );
- return NLNIL;
- }
- }
-