56 lines
917 B
C
56 lines
917 B
C
/*
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abCOpLn.c
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By: Jeremy Rand
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*/
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#include <math.h>
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#include <stdio.h>
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#include "abCError.h"
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#include "abCStack.h"
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#include "expr/abCExpr.h"
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#include "expr/abCExpReal.h"
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#include "ops/abCOp.h"
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#include "ops/abCOpLn.h"
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#define LN_NAME "LN"
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static void lnExecute(void);
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void abCalcOpLnInit(void)
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{
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abCalcOpRegister(LN_NAME, lnExecute);
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}
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void lnExecute(void)
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{
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abCalcExpr result;
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AB_CALC_OP_ONE_ARG(LN_NAME);
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if (expr->type != abCalcExprTypeReal) {
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abCalcRaiseError(abCalcBadArgTypeError, LN_NAME);
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return;
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}
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if (expr->u.real == 0.0) {
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abCalcRaiseError(abCalcInfiniteResultError, LN_NAME);
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return;
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}
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if (expr->u.real < 0.0) {
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abCalcRaiseError(abCalcComplexResultError, LN_NAME);
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return;
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}
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abCalcExprRealSet(&result, log(expr->u.real));
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abCalcStackExprPop(NULL);
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abCalcStackExprPush(&result);
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}
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