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