89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*
|
|
* Author: Ceriel J.H. Jacobs
|
|
*/
|
|
#ifndef DESIG_H_
|
|
#define DESIG_H_
|
|
|
|
/* D E S I G N A T O R D E S C R I P T I O N S */
|
|
|
|
/* $Id$ */
|
|
|
|
#include <em_arith.h>
|
|
|
|
/* Generating code for designators is not particularly easy, especially if
|
|
you don't know wether you want the address or the value.
|
|
The next structure is used to generate code for designators.
|
|
It contains information on how to find the designator, after generation
|
|
of the code that is common to both address and value computations.
|
|
*/
|
|
|
|
struct desig {
|
|
short dsg_kind;
|
|
#define DSG_INIT 0 /* don't know anything yet */
|
|
#define DSG_LOADED 1 /* designator loaded on top of the stack */
|
|
#define DSG_PLOADED 2 /* designator accessible through pointer on
|
|
stack, possibly with an offset
|
|
*/
|
|
#define DSG_FIXED 3 /* designator directly accessible */
|
|
#define DSG_PFIXED 4 /* designator accessible through directly
|
|
accessible pointer
|
|
*/
|
|
#define DSG_INDEXED 5 /* designator accessible through array
|
|
operation. Address of array descriptor on
|
|
top of the stack, index beneath that, and
|
|
base address beneath that
|
|
*/
|
|
arith dsg_offset; /* contains an offset for PLOADED,
|
|
or for FIXED or PFIXED it contains an
|
|
offset from dsg_name, if it exists,
|
|
or from the current Local Base
|
|
*/
|
|
char *dsg_name; /* name of global variable, used for
|
|
FIXED and PFIXED
|
|
*/
|
|
struct def *dsg_def; /* def structure associated with this
|
|
designator, or 0
|
|
*/
|
|
};
|
|
|
|
|
|
/* The next structure describes the designator in a with-statement.
|
|
We have a linked list of them, as with-statements may be nested.
|
|
*/
|
|
|
|
struct withdesig {
|
|
struct withdesig *w_next;
|
|
int w_flags; /* D_USED|D_DEFINED */
|
|
struct scope *w_scope; /* scope in which fields of this record
|
|
reside
|
|
*/
|
|
struct desig w_desig; /* a desig structure for this particular
|
|
designator
|
|
*/
|
|
};
|
|
|
|
extern struct withdesig *WithDesigs;
|
|
|
|
#define NO_LABEL ((label) 0)
|
|
|
|
struct type;
|
|
struct node;
|
|
|
|
|
|
void LOL(arith offset, arith size);
|
|
void STL(arith offset, arith size);
|
|
void CodeValue(register struct desig *ds, register struct type *tp);
|
|
void ChkForFOR(register struct node *nd);
|
|
void CodeStore(register struct desig *ds, register struct type *tp);
|
|
void CodeCopy(register struct desig *lhs, register struct desig *rhs, arith sz, arith *psize);
|
|
void CodeMove(register struct desig *rhs, register struct node *left, struct type *rtp);
|
|
void CodeAddress(register struct desig *ds);
|
|
void CodeFieldDesig(register struct def *df, register struct desig *ds);
|
|
void CodeVarDesig(register struct def *df, register struct desig *ds);
|
|
void CodeDesig(register struct node *nd, register struct desig *ds);
|
|
|
|
#endif /* DESIG_H_ */
|