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/*
* Copyright (c) 2011, Tom Distler (http://tdistler.com)
* All rights reserved.
*
* The BSD License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the tdistler.com nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "math_utils.h"
#include <math.h>
int _round(float a)
{
int sign_a = a > 0.0f ? 1 : -1;
return a-(int)a >= 0.5 ? (int)a + sign_a : (int)a;
}
int _max(int x, int y)
{
return x >= y ? x : y;
}
int _min(int x, int y)
{
return x <= y ? x : y;
}
int _cmp_float(float a, float b, int digits)
{
/* Round */
int sign_a = a > 0.0f ? 1 : -1;
int sign_b = b > 0.0f ? 1 : -1;
double scale = pow(10.0, (double)digits);
double ax = a * scale;
double bx = b * scale;
int ai = ax-(int)ax >= 0.5 ? (int)ax + sign_a : (int)ax;
int bi = bx-(int)bx >= 0.5 ? (int)bx + sign_b : (int)bx;
/* Compare */
return ai == bi ? 0 : 1;
}
int _matrix_cmp(const float *a, const float *b, int w, int h, int digits)
{
int offset;
int result=0;
int len=w*h;
for (offset=0; offset<len; ++offset) {
if (_cmp_float(a[offset], b[offset], digits)) {
result = 1;
break;
}
}
return result;
}
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