[unix-history] / usr / src / cmd / pxp / lval.c

/* Copyright (c) 1979 Regents of the University of California */
#
/*
 * pxp - Pascal execution profiler
 *
 * Bill Joy UCB
 * Version 1.2 January 1979
 */

#include "0.h"
#include "tree.h"

/*
 * A "variable"
 */
lvalue(r)
	register int *r;
{
	register *c, *co;

	ppid(r[2]);
	for (c = r[3]; c != NIL; c = c[2]) {
		co = c[1];
		if (co == NIL)
			continue;
		switch (co[0]) {
			case T_PTR:
				ppop("^");
				continue;
			case T_ARY:
				arycod(co[1]);
				continue;
			case T_FIELD:
				ppop(".");
				ppid(co[1]);
				continue;
			case T_ARGL:
				ppid("{unexpected argument list}");
				break;
			default:
				panic("lval2");
		}
	}
}

/*
 * Subscripting
 */
arycod(el)
	register int *el;
{

	ppbra("[");
	if (el != NIL)
		for (;;) {
			rvalue(el[1], NIL);
			el = el[2];
			if (el == NIL)
				break;
			ppsep(", ");
		}
	else
		rvalue(NIL, NIL);
	ppket("]");
}
Commit	Line	Data
49e8dbd7 BJ	1	/* Copyright (c) 1979 Regents of the University of California */
	2	#
	3	/*
	4	* pxp - Pascal execution profiler
	5	*
	6	* Bill Joy UCB
	7	* Version 1.2 January 1979
	8	*/
	9
	10	#include "0.h"
	11	#include "tree.h"
	12
	13	/*
	14	* A "variable"
	15	*/
	16	lvalue(r)
	17	register int *r;
	18	{
	19	register c, co;
	20
	21	ppid(r[2]);
	22	for (c = r[3]; c != NIL; c = c[2]) {
	23	co = c[1];
	24	if (co == NIL)
	25	continue;
	26	switch (co[0]) {
	27	case T_PTR:
	28	ppop("^");
	29	continue;
	30	case T_ARY:
	31	arycod(co[1]);
	32	continue;
	33	case T_FIELD:
	34	ppop(".");
	35	ppid(co[1]);
	36	continue;
	37	case T_ARGL:
	38	ppid("{unexpected argument list}");
	39	break;
	40	default:
	41	panic("lval2");
	42	}
	43	}
	44	}
	45
	46	/*
	47	* Subscripting
	48	*/
	49	arycod(el)
	50	register int *el;
	51	{
	52
	53	ppbra("[");
	54	if (el != NIL)
	55	for (;;) {
	56	rvalue(el[1], NIL);
	57	el = el[2];
	58	if (el == NIL)
	59	break;
	60	ppsep(", ");
	61	}
	62	else
	63	rvalue(NIL, NIL);
	64	ppket("]");
65	}