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Theodosius/Examples/Theodosius-Kernel/Theodosius-VDM/Zycore/Bitset.h

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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
* Implements the bitset class.
*/
#ifndef ZYCORE_BITSET_H
#define ZYCORE_BITSET_H
#include <ZycoreExportConfig.h>
#include <Zycore/Allocator.h>
#include <Zycore/Status.h>
#include <Zycore/Types.h>
#include <Zycore/Vector.h>
#ifdef __cplusplus
extern "C" {
#endif
/* ============================================================================================== */
/* Enums and types */
/* ============================================================================================== */
/**
* Defines the `ZyanVector` struct.
*
* All fields in this struct should be considered as "private". Any changes may lead to unexpected
* behavior.
*/
typedef struct ZyanBitset_
{
/**
* The bitset size.
*/
ZyanUSize size;
/**
* The bitset data.
*/
ZyanVector bits;
} ZyanBitset;
/**
* Defines the `ZyanBitsetByteOperation` function prototype.
*
* @param v1 A pointer to the first byte. This value receives the result after performing the
* desired operation.
* @param v2 A pointer to the second byte.
*
* @return A zyan status code.
*
* This function is used to perform byte-wise operations on two `ZyanBitset` instances.
*/
typedef ZyanStatus (*ZyanBitsetByteOperation)(ZyanU8* v1, const ZyanU8* v2);
/* ============================================================================================== */
/* Exported functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Constructor and destructor */
/* ---------------------------------------------------------------------------------------------- */
#ifndef ZYAN_NO_LIBC
/**
* Initializes the given `ZyanBitset` instance.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param count The initial amount of bits.
*
* @return A zyan status code.
*
* The space for the bitset is dynamically allocated by the default allocator using the default
* growth factor of `2.0f` and the default shrink threshold of `0.5f`.
*/
ZYCORE_EXPORT ZYAN_REQUIRES_LIBC ZyanStatus ZyanBitsetInit(ZyanBitset* bitset, ZyanUSize count);
#endif // ZYAN_NO_LIBC
/**
* Initializes the given `ZyanBitset` instance and sets a custom `allocator` and memory
* allocation/deallocation parameters.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param count The initial amount of bits.
* @param allocator A pointer to a `ZyanAllocator` instance.
* @param growth_factor The growth factor (from `1.0f` to `x.xf`).
* @param shrink_threshold The shrink threshold (from `0.0f` to `1.0f`).
*
* @return A zyan status code.
*
* A growth factor of `1.0f` disables overallocation and a shrink threshold of `0.0f` disables
* dynamic shrinking.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetInitEx(ZyanBitset* bitset, ZyanUSize count,
ZyanAllocator* allocator, float growth_factor, float shrink_threshold);
/**
* Initializes the given `ZyanBitset` instance and configures it to use a custom user
* defined buffer with a fixed size.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param count The initial amount of bits.
* @param buffer A pointer to the buffer that is used as storage for the bits.
* @param capacity The maximum capacity (number of bytes) of the buffer.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetInitBuffer(ZyanBitset* bitset, ZyanUSize count, void* buffer,
ZyanUSize capacity);
/**
* Destroys the given `ZyanBitset` instance.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetDestroy(ZyanBitset* bitset);
/* ---------------------------------------------------------------------------------------------- */
/* Logical operations */
/* ---------------------------------------------------------------------------------------------- */
/**
* Performs a byte-wise `operation` for every byte in the given `ZyanBitset` instances.
*
* @param destination A pointer to the `ZyanBitset` instance that is used as the first input and
* as the destination.
* @param source A pointer to the `ZyanBitset` instance that is used as the second input.
* @param operation A pointer to the function that performs the desired operation.
*
* @return A zyan status code.
*
* The `operation` callback is invoked once for every byte in the smallest of the `ZyanBitset`
* instances.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetPerformByteOperation(ZyanBitset* destination,
const ZyanBitset* source, ZyanBitsetByteOperation operation);
/**
* Performs a logical `AND` operation on the given `ZyanBitset` instances.
*
* @param destination A pointer to the `ZyanBitset` instance that is used as the first input and
* as the destination.
* @param source A pointer to the `ZyanBitset` instance that is used as the second input.
*
* @return A zyan status code.
*
* If the destination bitmask contains more bits than the source one, the state of the remaining
* bits will be undefined.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetAND(ZyanBitset* destination, const ZyanBitset* source);
/**
* Performs a logical `OR` operation on the given `ZyanBitset` instances.
*
* @param destination A pointer to the `ZyanBitset` instance that is used as the first input and
* as the destination.
* @param source A pointer to the `ZyanBitset` instance that is used as the second input.
*
* @return A zyan status code.
*
* If the destination bitmask contains more bits than the source one, the state of the remaining
* bits will be undefined.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetOR (ZyanBitset* destination, const ZyanBitset* source);
/**
* Performs a logical `XOR` operation on the given `ZyanBitset` instances.
*
* @param destination A pointer to the `ZyanBitset` instance that is used as the first input and
* as the destination.
* @param source A pointer to the `ZyanBitset` instance that is used as the second input.
*
* @return A zyan status code.
*
* If the destination bitmask contains more bits than the source one, the state of the remaining
* bits will be undefined.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetXOR(ZyanBitset* destination, const ZyanBitset* source);
/**
* Flips all bits of the given `ZyanBitset` instance.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetFlip(ZyanBitset* bitset);
/* ---------------------------------------------------------------------------------------------- */
/* Bit access */
/* ---------------------------------------------------------------------------------------------- */
/**
* Sets the bit at `index` of the given `ZyanBitset` instance to `1`.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param index The bit index.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetSet(ZyanBitset* bitset, ZyanUSize index);
/**
* Sets the bit at `index` of the given `ZyanBitset` instance to `0`.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param index The bit index.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetReset(ZyanBitset* bitset, ZyanUSize index);
/**
* Sets the bit at `index` of the given `ZyanBitset` instance to the specified `value`.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param index The bit index.
* @param value The new value.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetAssign(ZyanBitset* bitset, ZyanUSize index, ZyanBool value);
/**
* Toggles the bit at `index` of the given `ZyanBitset` instance.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param index The bit index.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetToggle(ZyanBitset* bitset, ZyanUSize index);
/**
* Returns the value of the bit at `index`.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param index The bit index.
*
* @return `ZYAN_STATUS_TRUE`, if the bit is set or `ZYAN_STATUS_FALSE`, if not, Another zyan
* status code, if an error occured.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetTest(ZyanBitset* bitset, ZyanUSize index);
/**
* Returns the value of the most significant bit.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return `ZYAN_STATUS_TRUE`, if the bit is set or `ZYAN_STATUS_FALSE`, if not. Another zyan
* status code, if an error occured.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetTestMSB(ZyanBitset* bitset);
/**
* Returns the value of the least significant bit.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return `ZYAN_STATUS_TRUE`, if the bit is set or `ZYAN_STATUS_FALSE`, if not. Another zyan
* status code, if an error occured.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetTestLSB(ZyanBitset* bitset);
/* ---------------------------------------------------------------------------------------------- */
/**
* Sets all bits of the given `ZyanBitset` instance to `1`.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetSetAll(ZyanBitset* bitset);
/**
* Sets all bits of the given `ZyanBitset` instance to `0`.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetResetAll(ZyanBitset* bitset);
/* ---------------------------------------------------------------------------------------------- */
/* Size management */
/* ---------------------------------------------------------------------------------------------- */
/**
* Adds a new bit at the end of the bitset.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param value The value of the new bit.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetPush(ZyanBitset* bitset, ZyanBool value);
/**
* Removes the last bit of the bitset.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetPop(ZyanBitset* bitset);
/**
* Deletes all bits of the given `ZyanBitset` instance.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetClear(ZyanBitset* bitset);
/* ---------------------------------------------------------------------------------------------- */
/* Memory management */
/* ---------------------------------------------------------------------------------------------- */
/**
* Changes the capacity of the given `ZyanBitset` instance.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param count The new capacity (number of bits).
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetReserve(ZyanBitset* bitset, ZyanUSize count);
/**
* Shrinks the capacity of the given bitset to match it's size.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetShrinkToFit(ZyanBitset* bitset);
/* ---------------------------------------------------------------------------------------------- */
/* Information */
/* ---------------------------------------------------------------------------------------------- */
/**
* Returns the current size of the bitset in bits.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param size Receives the size of the bitset in bits.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetGetSize(const ZyanBitset* bitset, ZyanUSize* size);
/**
* Returns the current capacity of the bitset in bits.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param capacity Receives the size of the bitset in bits.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetGetCapacity(const ZyanBitset* bitset, ZyanUSize* capacity);
/**
* Returns the current size of the bitset in bytes.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param size Receives the size of the bitset in bytes.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetGetSizeBytes(const ZyanBitset* bitset, ZyanUSize* size);
/**
* Returns the current capacity of the bitset in bytes.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param capacity Receives the size of the bitset in bytes.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetGetCapacityBytes(const ZyanBitset* bitset, ZyanUSize* capacity);
/* ---------------------------------------------------------------------------------------------- */
/**
* Returns the amount of bits set in the given bitset.
*
* @param bitset A pointer to the `ZyanBitset` instance.
* @param count Receives the amount of bits set in the given bitset.
*
* @return A zyan status code.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetCount(const ZyanBitset* bitset, ZyanUSize* count);
/**
* Checks, if all bits of the given bitset are set.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return `ZYAN_STATUS_TRUE`, if all bits are set, `ZYAN_STATUS_FALSE`, if not. Another zyan
* status code, if an error occured.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetAll(const ZyanBitset* bitset);
/**
* Checks, if at least one bit of the given bitset is set.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return `ZYAN_STATUS_TRUE`, if at least one bit is set, `ZYAN_STATUS_FALSE`, if not. Another
* zyan status code, if an error occured.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetAny(const ZyanBitset* bitset);
/**
* Checks, if none bits of the given bitset are set.
*
* @param bitset A pointer to the `ZyanBitset` instance.
*
* @return `ZYAN_STATUS_TRUE`, if none bits are set, `ZYAN_STATUS_FALSE`, if not. Another zyan
* status code, if an error occured.
*/
ZYCORE_EXPORT ZyanStatus ZyanBitsetNone(const ZyanBitset* bitset);
///* ---------------------------------------------------------------------------------------------- */
//
///**
// * Returns a 32-bit unsigned integer representation of the data.
// *
// * @param bitset A pointer to the `ZyanBitset` instance.
// * @param value Receives the 32-bit unsigned integer representation of the data.
// *
// * @return A zyan status code.
// */
//ZYCORE_EXPORT ZyanStatus ZyanBitsetToU32(const ZyanBitset* bitset, ZyanU32* value);
//
///**
// * Returns a 64-bit unsigned integer representation of the data.
// *
// * @param bitset A pointer to the `ZyanBitset` instance.
// * @param value Receives the 64-bit unsigned integer representation of the data.
// *
// * @return A zyan status code.
// */
//ZYCORE_EXPORT ZyanStatus ZyanBitsetToU64(const ZyanBitset* bitset, ZyanU64* value);
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
#ifdef __cplusplus
}
#endif
#endif /* ZYCORE_BITSET_H */