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