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