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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
/*=============================================================================
**
** Source: test1.c
**
** Purpose: Test to ensure that log returns correct values.
**
** Dependencies: PAL_Initialize
** PAL_Terminate
** Fail
** fabs
** _finite
** _isnan
**
**
**===========================================================================*/
#include <palsuite.h>
#define DELTA 0.0000001 /*Error acceptance level to the 7th decimal */
/**
* Helper test structure
*/
struct test
{
double value; /* value to test the function with */
double result; /* expected result */
};
/**
* main
*
* executable entry point
*/
INT __cdecl main(INT argc, CHAR **argv)
{
int i;
double result;
struct test tests[] =
{
/* Value test result */
{ 6.704916531877, 0.826393375779 },
{ 15.823847163305, 1.199312079583 },
{ 21.658986175115, 1.335638124087 },
{ 34.134952848903, 1.533199307291 },
{ 42.857142857143, 1.632023214705 },
{ 57.573168126469, 1.760220128395 },
{ 67.363505966369, 1.828424682147 },
{ 75.649281289102, 1.878804806336 },
{ 99.877925962096, 1.999469515332 },
{ 1706.203161717582, 3.232030742400 },
{ 3016.598101748711, 3.479517453423 },
{ 4017.596636860256, 3.603966331820 },
{ 5462.646626178777, 3.737403107294 },
{ 7199.790368358409, 3.857319851544 },
{ 13577.991882076480, 4.132835544685 },
{ 19235.535721915341, 4.284104286189 },
{ 24904.989593188267, 4.396286364594 },
{ 10690368.906277657000, 7.028992692224 },
{ 40653667.728385270000, 7.609099733260 },
{ 71100035.987914667000, 7.851869820552 },
{ 111208971.628284560000, 8.046139824759 },
{ 172499991.153172400000, 8.236789077136 },
{ 244361677.392925830000, 8.388033097635 },
{ 292552744.803003010000, 8.466204177125 },
{ 317831243.774193530000, 8.502196587433 },
{ 501815331.063020770000, 8.700543925401 },
};
double indefinite[] =
{
-864278.51, -1000.2, -2
};
/* PAL initialization */
if( PAL_Initialize(argc, argv) != 0 )
{
return (FAIL);
}
for( i = 0; i < sizeof(tests) / sizeof(struct test); i++)
{
double testDelta;
result = log10( tests[i].value );
/*
* The test is valid when the difference between the
* result and the expectation is less than DELTA
*/
testDelta = fabs( result - tests[i].result );
if( testDelta >= DELTA )
{
Fail( "log10(%g) returned %20.10f"
" when it should have returned %20.10f",
tests[i].value,
result,
tests[i].result );
}
}
for( i = 0; i < sizeof(indefinite) / sizeof(double); i++)
{
result = log10( indefinite[i] );
/* The test is valid when the function returns a defined result */
if( ! _isnan( result ) )
{
Fail( "log10(%g) returned %20.10f"
" when it should have returned -1.#IND00000000",
indefinite[i],
result );
}
}
/* log(0) is a special case */
result = log10( 0.0 );
if( _finite( result ) )
{
Fail( "log10(%g) returned %20.10f"
" when it should have returned -1.#INF00000000",
0.0,
result );
}
PAL_Terminate();
return PASS;
}
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