abCalc/ops/abCOpInv.c

52 lines
817 B
C

/*
abCOpInv.c
By: Jeremy Rand
*/
#include <math.h>
#include <stdio.h>
#include "abCError.h"
#include "abCStack.h"
#include "expr/abCExpr.h"
#include "expr/abCExpReal.h"
#include "ops/abCOp.h"
#include "ops/abCOpInv.h"
#define INV_NAME "INV"
static void invExecute(void);
void abCalcOpInvInit(void)
{
abCalcOpRegister(INV_NAME, invExecute);
}
void invExecute(void)
{
abCalcExpr result;
AB_CALC_OP_ONE_ARG(INV_NAME);
if (expr->type != abCalcExprTypeReal) {
abCalcRaiseError(abCalcBadArgTypeError, INV_NAME);
return;
}
if (expr->u.real == 0.0) {
abCalcRaiseError(abCalcInfiniteResultError, INV_NAME);
return;
}
abCalcExprRealSet(&result, 1.0 / expr->u.real);
abCalcStackExprPop(NULL);
abCalcStackExprPush(&result);
}