75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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* Author: Ceriel J.H. Jacobs
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*/
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/* P A R S E T R E E W A L K E R */
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#ifndef WALK_H_
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#define WALK_H_
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#include "em_label.h"
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/* Forward type declarations. */
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struct node;
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struct def;
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struct desig;
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/* Definition of WalkNode macro
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*/
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extern int (*WalkTable[])(struct node*, label, int);
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#define WalkNode(xnd, xlab, rch) (*WalkTable[(unsigned int)((xnd)->nd_class)])((xnd), (xlab),(rch))
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extern label text_label;
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extern label data_label;
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#ifndef SQUEEZE
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#define c_loc(x) C_loc((arith) (x))
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#define c_lae_dlb(x) C_lae_dlb(x,(arith) 0)
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#define CAL(nm, sz) (C_cal(nm), C_asp((arith)(sz)))
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#define c_bra(x) C_bra((label) (x))
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#endif
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int LblWalkNode(label lbl, struct node *nd, int exit, int reach);
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void def_ilb(label l);
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/* Generate line information as necessary for "nd". */
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void DoLineno(register struct node* nd);
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/* Generate filename information, when needed.
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This routine is called at the generation of a
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procedure entry, and after generating a call to
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another procedure. The current active filename
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is used.
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*/
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void DoFilename(int needed);
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/* Walk through a module, and all its local definitions.
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Also generate code for its body.
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This code is collected in an initialization routine.
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*/
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void WalkModule(register struct def* module);
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/* Walk through the definition of a procedure and all its
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local definitions, checking and generating code.
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*/
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void WalkProcedure(register struct def* procedure);
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/* Walk node "nd", which is a link.
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"exit_label" is set to a label number when inside a LOOP.
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"end_reached" maintains info about reachability (REACH_FLAG),
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and whether an EXIT statement was seen (EXIT_FLAG).
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*/
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int WalkLink(register struct node* nd, label exit_label, int end_reached);
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/* Walk through a statement node "nd", generating code for it. */
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int WalkStat(register struct node* nd, label exit_label, int end_reached);
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/* Generate code to evaluate a boolean expression "pnd" */
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void ExpectBool(register struct node** pnd, label true_label, label false_label);
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/* Check designator and generate code for it */
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int WalkDesignator(struct node** pnd, struct desig* ds, int flags);
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void DoAssign(register struct node* nd);
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int DoForInit(struct node* nd);
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#endif /* WALK_H_ */
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