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/* EINA - EFL data type library
* Copyright (C) 2015 Vincent Torri
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library;
* if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EINA_UTIL_H_
#define EINA_UTIL_H_
#include <float.h>
#include <math.h>
/**
* @addtogroup Eina_Tools_Group Tools
*
* @{
*/
/**
* @brief Returns the content of the environment referred by HOME on this system.
* @return A temporary string to the content referred by HOME on this system.
*
* @note The result of this call is highly system dependent and you better use
* it instead of the naive getenv("HOME").
*
* @since 1.15
*/
EAPI const char *eina_environment_home_get(void);
/**
* @brief Returns the content of the environment referred as TMPDIR on this system.
* @return A temporary string to the content referred by TMPDIR on this system.
*
* @note The result of this call is highly system dependent and you better use
* it instead of the naive getenv("TMPDIR").
*
* @since 1.15
*/
EAPI const char *eina_environment_tmp_get(void);
/**
* @brief Warningless comparison of doubles using ==
* @param a First member to compare
* @param b Second member to compare
*
* @return @c true if two doubles match
* @since 1.19
*/
static inline Eina_Bool eina_dbl_exact(double a, double b);
/**
* @brief Warningless comparison of floats using ==
* @param a First member to compare
* @param b Second member to compare
*
* @return @c true if two floats match
* @since 1.19
*/
static inline Eina_Bool eina_flt_exact(float a, float b);
/**
* @brief Safe comparison of float
* @param a First member to compare
* @param b Second member to compare
* @since 1.19
*
* @return @c true if two floats match
*/
#define EINA_FLT_EQ(a, b) (!!(fabsf((float)a - (float)b) <= FLT_EPSILON))
/**
* @brief Determines if a float is not zero
* @param a The float
*
* @return @c true if float is not zero
* @since 1.19
*/
#define EINA_FLT_NONZERO(a) (!!(fpclassify((float)(a)) != FP_ZERO))
/**
* @brief Safe comparison of double
* @param a First member to compare
* @param b Second member to compare
* @since 1.19
*
* @return @c true if two double match
*/
#define EINA_DBL_EQ(a, b) (!!(fabs((double)a - (double)b) <= DBL_EPSILON))
/**
* @brief Determines if a double is not zero
* @param a The double
*
* @return @c true if double is not zero
* @since 1.19
*/
#define EINA_DBL_NONZERO(a) (!!(fpclassify((double)(a)) != FP_ZERO))
/**
* @}
*/
#include "eina_inline_util.x"
#endif
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