abCalc/ops/abCOpAcos.c

53 lines
862 B
C

/*
abCOpAcos.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/abCOpAcos.h"
#define ACOS_NAME "ACOS"
static void acosExecute(void);
void abCalcOpAcosInit(void)
{
abCalcOpRegister(ACOS_NAME, acosExecute);
}
void acosExecute(void)
{
abCalcExpr result;
AB_CALC_OP_ONE_ARG(ACOS_NAME);
if (expr->type != abCalcExprTypeReal) {
abCalcRaiseError(abCalcBadArgTypeError, ACOS_NAME);
return;
}
if ((expr->u.real < -1.0) ||
(expr->u.real > 1.0)) {
abCalcRaiseError(abCalcComplexResultError, ACOS_NAME);
return;
}
abCalcExprRealSet(&result, acos(expr->u.real));
abCalcStackExprPop(NULL);
abCalcStackExprPush(&result);
}