/* File gen.c: 2.1 (83/03/20,16:02:06) */
/*% cc -O -c %
 *
 */

#include <stdio.h>
#include "defs.h"
#include "data.h"
#include "headers.h"
 

/*
 * return next available internal label number
 *
 */
int getlabel(void) {
	int t;

   t = nxtlab;
   if (nxtlab + 1 > LABELCOUNTMAX - 1)
   	error("Too many labels");
   else
   	nxtlab++;
	return (t);
}


/*
 * print specified number as label
 */
void printlabel(int label) {
	olprfix();
	outdec(label);
}


/*
 * glabel - generate label
 */
void glabel(char *lab) {
	LabPrefix();
	outstr(lab);
	col();
	nl();
}


/*
 * gnlabel - generate numeric label
 */
void gnlabel(int nlab) {
	printlabel(nlab);
	col();
	nl();
}


char outbyte(char c) {
	if (c == 0)
		return (0);
	fputc(c, output);
	return (c);
}


void outstr(char *ptr) {
	int k;

	k = 0;
	while (outbyte(ptr[k]))
		k++;
}


void tab(void) {
	outbyte(9);
}


void ol(char *ptr) {
	ot(ptr);
	nl();
}


void ot(char *ptr) {
	tab();
	outstr(ptr);
}


void outdec(int number) {
	char ttt[50];

   sprintf(ttt, "%d", number);
   outstr(ttt);
}
		


void outundec(unsigned int number) {
	char ttt[50];

   sprintf(ttt, "%u", number);
   outstr(ttt);
}
		

void store(STATE *stpt) {
	if (stpt->storage == REGISTER)
   	putreg(stpt);
   else
	if (stpt->storage != AUTO)
		putmem(stpt);
	else
		putstk(stpt, 0);
}



void rvalue(STATE *stpt) {
	if (stpt->pointing && (symtab[stpt->ptr].reg & CONSTANT))
   	ld_constant(stpt);
   else
   if (stpt->storage == REGISTER)
		getreg(stpt);
   else
   if (stpt->ident == FUNCTION)
   	gpop(CINT);
   else
	if (!stpt->pointing && stpt->storage != AUTO)
		getmem(stpt);
   else
   	indirect(stpt);

	Check1Cast(stpt);
}


void test(int label, int ft) {
	needbrack("(");
   Emitting = rhs = RHSisPntr = 0;
	JumpOutLabel = label;
   SimplyTrue = TRUE;
   IfFlag = 1;
	expression(YES);
	needbrack(")");
	if (SimplyTrue) {
   	NoJump = TRUE;
		testjump(label, ft, TheType);
      }
	ot("rjmp\t");
	printlabel(label);
	nl();

   IfFlag = 0;
}


void backtest(int label, int ft) {
	needbrack("(");
   Emitting = rhs = RHSisPntr = 0;
	JumpOutLabel = label;
   SimplyTrue = TRUE;
   IfFlag = 1;
	expression(YES);
	needbrack(")");
	if (SimplyTrue) {
   	NoJump = TRUE;
		testjump(label, ft, TheType);
      }
   ol("rjmp\t$+4");
	ot("rjmp\t");
	printlabel(label);
	nl();
   IfFlag = 0;
}