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317 lines
12 KiB
317 lines
12 KiB
/***************************************************************************************************
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Zyan Core Library (Zycore-C)
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Original Author : Florian Bernd
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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***************************************************************************************************/
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/**
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* @file
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* Defines prototypes of general-purpose comparison functions.
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*/
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#ifndef ZYCORE_COMPARISON_H
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#define ZYCORE_COMPARISON_H
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#include <Zycore/Defines.h>
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#include <Zycore/Types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* ============================================================================================== */
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/* Enums and types */
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/* ============================================================================================== */
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/**
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* Defines the `ZyanEqualityComparison` function prototype.
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*
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* @param left A pointer to the first element.
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* @param right A pointer to the second element.
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*
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* @return This function should return `ZYAN_TRUE` if the `left` element equals the `right` one
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* or `ZYAN_FALSE`, if not.
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*/
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typedef ZyanBool (*ZyanEqualityComparison)(const void* left, const void* right);
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/**
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* Defines the `ZyanComparison` function prototype.
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*
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* @param left A pointer to the first element.
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* @param right A pointer to the second element.
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*
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* @return This function should return values in the following range:
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* `left == right -> result == 0`
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* `left < right -> result < 0`
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* `left > right -> result > 0`
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*/
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typedef ZyanI32 (*ZyanComparison)(const void* left, const void* right);
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/* ============================================================================================== */
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/* Macros */
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/* ============================================================================================== */
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/* ---------------------------------------------------------------------------------------------- */
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/* Equality comparison functions */
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/* ---------------------------------------------------------------------------------------------- */
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/**
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* Declares a generic equality comparison function for an integral data-type.
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*
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* @param name The name of the function.
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* @param type The name of the integral data-type.
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*/
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#define ZYAN_DECLARE_EQUALITY_COMPARISON(name, type) \
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ZyanBool name(const type* left, const type* right) \
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{ \
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ZYAN_ASSERT(left); \
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ZYAN_ASSERT(right); \
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\
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return (*left == *right) ? ZYAN_TRUE : ZYAN_FALSE; \
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}
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/**
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* Declares a generic equality comparison function that compares a single integral
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* data-type field of a struct.
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*
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* @param name The name of the function.
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* @param type The name of the integral data-type.
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* @param field_name The name of the struct field.
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*/
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#define ZYAN_DECLARE_EQUALITY_COMPARISON_FOR_FIELD(name, type, field_name) \
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ZyanBool name(const type* left, const type* right) \
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{ \
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ZYAN_ASSERT(left); \
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ZYAN_ASSERT(right); \
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\
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return (left->field_name == right->field_name) ? ZYAN_TRUE : ZYAN_FALSE; \
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}
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/* ---------------------------------------------------------------------------------------------- */
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/* Comparison functions */
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/* ---------------------------------------------------------------------------------------------- */
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/**
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* Declares a generic comparison function for an integral data-type.
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*
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* @param name The name of the function.
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* @param type The name of the integral data-type.
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*/
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#define ZYAN_DECLARE_COMPARISON(name, type) \
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ZyanI32 name(const type* left, const type* right) \
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{ \
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ZYAN_ASSERT(left); \
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ZYAN_ASSERT(right); \
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\
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if (*left < *right) \
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{ \
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return -1; \
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} \
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if (*left > *right) \
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{ \
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return 1; \
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} \
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return 0; \
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}
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/**
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* Declares a generic comparison function that compares a single integral data-type field
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* of a struct.
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*
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* @param name The name of the function.
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* @param type The name of the integral data-type.
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* @param field_name The name of the struct field.
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*/
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#define ZYAN_DECLARE_COMPARISON_FOR_FIELD(name, type, field_name) \
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ZyanI32 name(const type* left, const type* right) \
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{ \
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ZYAN_ASSERT(left); \
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ZYAN_ASSERT(right); \
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\
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if (left->field_name < right->field_name) \
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{ \
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return -1; \
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} \
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if (left->field_name > right->field_name) \
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{ \
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return 1; \
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} \
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return 0; \
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}
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/* ---------------------------------------------------------------------------------------------- */
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/* ============================================================================================== */
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/* Exported functions */
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/* ============================================================================================== */
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/* ---------------------------------------------------------------------------------------------- */
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/* Default equality comparison functions */
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/* ---------------------------------------------------------------------------------------------- */
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/**
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* Defines a default equality comparison function for pointer values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `ZYAN_TRUE` if the `left` value equals the `right` one or `ZYAN_FALSE`, if
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* not.
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*/
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ZYAN_INLINE ZYAN_DECLARE_EQUALITY_COMPARISON(ZyanEqualsPointer, void* const)
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/**
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* Defines a default equality comparison function for `ZyanBool` values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `ZYAN_TRUE` if the `left` value equals the `right` one or `ZYAN_FALSE`, if
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* not.
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*/
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ZYAN_INLINE ZYAN_DECLARE_EQUALITY_COMPARISON(ZyanEqualsBool, ZyanBool)
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/**
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* Defines a default equality comparison function for 8-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `ZYAN_TRUE` if the `left` value equals the `right` one or `ZYAN_FALSE`, if
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* not.
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*/
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ZYAN_INLINE ZYAN_DECLARE_EQUALITY_COMPARISON(ZyanEqualsNumeric8, ZyanU8)
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/**
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* Defines a default equality comparison function for 16-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `ZYAN_TRUE` if the `left` value equals the `right` one or `ZYAN_FALSE`, if
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* not.
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*/
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ZYAN_INLINE ZYAN_DECLARE_EQUALITY_COMPARISON(ZyanEqualsNumeric16, ZyanU16)
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/**
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* Defines a default equality comparison function for 32-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `ZYAN_TRUE` if the `left` value equals the `right` one or `ZYAN_FALSE`, if
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* not.
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*/
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ZYAN_INLINE ZYAN_DECLARE_EQUALITY_COMPARISON(ZyanEqualsNumeric32, ZyanU32)
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/**
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* Defines a default equality comparison function for 64-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `ZYAN_TRUE` if the `left` value equals the `right` one or `ZYAN_FALSE`, if
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* not.
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*/
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ZYAN_INLINE ZYAN_DECLARE_EQUALITY_COMPARISON(ZyanEqualsNumeric64, ZyanU64)
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/* ---------------------------------------------------------------------------------------------- */
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/* Default comparison functions */
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/* ---------------------------------------------------------------------------------------------- */
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/**
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* Defines a default comparison function for pointer values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `0` if the `left` value equals the `right` one, `-1` if the `left` value is
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* less than the `right` one, or `1` if the `left` value is greater than the `right` one.
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*/
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ZYAN_INLINE ZYAN_DECLARE_COMPARISON(ZyanComparePointer, void* const)
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/**
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* Defines a default comparison function for `ZyanBool` values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `0` if the `left` value equals the `right` one, `-1` if the `left` value is
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* less than the `right` one, or `1` if the `left` value is greater than the `right` one.
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*/
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ZYAN_INLINE ZYAN_DECLARE_COMPARISON(ZyanCompareBool, ZyanBool)
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/**
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* Defines a default comparison function for 8-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `0` if the `left` value equals the `right` one, `-1` if the `left` value is
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* less than the `right` one, or `1` if the `left` value is greater than the `right` one.
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*/
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ZYAN_INLINE ZYAN_DECLARE_COMPARISON(ZyanCompareNumeric8, ZyanU8)
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/**
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* Defines a default comparison function for 16-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `0` if the `left` value equals the `right` one, `-1` if the `left` value is
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* less than the `right` one, or `1` if the `left` value is greater than the `right` one.
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*/
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ZYAN_INLINE ZYAN_DECLARE_COMPARISON(ZyanCompareNumeric16, ZyanU16)
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/**
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* Defines a default comparison function for 32-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `0` if the `left` value equals the `right` one, `-1` if the `left` value is
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* less than the `right` one, or `1` if the `left` value is greater than the `right` one.
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*/
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ZYAN_INLINE ZYAN_DECLARE_COMPARISON(ZyanCompareNumeric32, ZyanU32)
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/**
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* Defines a default comparison function for 64-bit numeric values.
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*
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* @param left A pointer to the first value.
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* @param right A pointer to the second value.
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*
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* @return Returns `0` if the `left` value equals the `right` one, `-1` if the `left` value is
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* less than the `right` one, or `1` if the `left` value is greater than the `right` one.
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*/
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ZYAN_INLINE ZYAN_DECLARE_COMPARISON(ZyanCompareNumeric64, ZyanU64)
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/* ---------------------------------------------------------------------------------------------- */
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/* ============================================================================================== */
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZYCORE_COMPARISON_H */
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