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/*
	Parser
	Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
	Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)

	$Id: compile_tools.C,v 1.26 2001/03/11 08:16:34 paf Exp $
*/

#include "compile_tools.h"
#include "pa_string.h"
#include "pa_array.h"
#include "pa_exception.h"
#include "pa_vstring.h"
#include "pa_vdouble.h"

void PV(Array/*<op>*/ *result, Value *value) {
	// append OP_VALUE
	Operation op; op.code=OP_VALUE;
	*result+=op.cast;

	// append 'value'
	*result+=value;
}

void PCA(Array/*<op>*/ *result, Array/*<op>*/ *code_array) {
	// append OP_CODE
	Operation op; op.code=OP_CODE__STORE_PARAM;
	*result+=op.cast;

	// append 'vstring'
	*result+=code_array;
}


Array *VL(Value *value) {
	// empty ops array
	Array *result=N(value->pool());

	// append 'value' to 'result'
	PV(result, value);

	return result;
}

const String *SLA2S(Array *literal_string_array, int offset) {
	Operation op;
	op.cast=literal_string_array->get(offset+0);
	if(op.code!=OP_VALUE)
		return 0;

	return static_cast<VString *>(literal_string_array->get(offset+1))->get_string();
}

void change_string_literal_to_double_literal(Array *literal_string_array) {
	VString *vstring=static_cast<VString *>(literal_string_array->get(1));
	Value *value=vstring->get_expr_result();
	literal_string_array->put(1, value);
}
void change_string_literal_to_write_string_literal(Array *literal_string_array) {
	Operation op; op.code=OP_STRING__WRITE;
	literal_string_array->put(0, op.cast);
}

void push_LS(struct parse_control *pc, lexical_state new_state) {
	if(pc->sp<MAX_LEXICAL_STATES) {
		pc->stack[pc->sp++]=pc->ls;  pc->ls=new_state;
	} else
		pc->pool->THROW(0, 0, 0, "push_LS: stack overflow");
}
void pop_LS(struct parse_control *pc) {
	if(--pc->sp>=0)
		pc->ls=pc->stack[pc->sp];
	else
		pc->pool->THROW(0, 0, 0, "push_LS: stack underflow");
}