src/cx/compare.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * \file compare.h
 * \brief A collection of simple compare functions.
 * \author Mike Becker
 * \author Olaf Wintermann
 * \copyright 2-Clause BSD License
 */

#ifndef UCX_COMPARE_H
#define UCX_COMPARE_H

#include "common.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * A comparator function comparing two collection elements.
 */
cx_attr_nonnull
cx_attr_nodiscard
typedef int(*cx_compare_func)(
        const void *left,
        const void *right
);

/**
 * Compares two integers of type int.
 *
 * @param i1 pointer to integer one
 * @param i2 pointer to integer two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_int(const void *i1, const void *i2);

/**
 * Compares two integers of type long int.
 *
 * @param i1 pointer to long integer one
 * @param i2 pointer to long integer two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_longint(const void *i1, const void *i2);

/**
 * Compares two integers of type long long.
 *
 * @param i1 pointer to long long one
 * @param i2 pointer to long long two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_longlong(const void *i1, const void *i2);

/**
 * Compares two integers of type int16_t.
 *
 * @param i1 pointer to int16_t one
 * @param i2 pointer to int16_t two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_int16(const void *i1, const void *i2);

/**
 * Compares two integers of type int32_t.
 *
 * @param i1 pointer to int32_t one
 * @param i2 pointer to int32_t two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_int32(const void *i1, const void *i2);

/**
 * Compares two integers of type int64_t.
 *
 * @param i1 pointer to int64_t one
 * @param i2 pointer to int64_t two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_int64(const void *i1, const void *i2);

/**
 * Compares two integers of type unsigned int.
 *
 * @param i1 pointer to unsigned integer one
 * @param i2 pointer to unsigned integer two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_uint(const void *i1, const void *i2);

/**
 * Compares two integers of type unsigned long int.
 *
 * @param i1 pointer to unsigned long integer one
 * @param i2 pointer to unsigned long integer two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_ulongint(const void *i1, const void *i2);

/**
 * Compares two integers of type unsigned long long.
 *
 * @param i1 pointer to unsigned long long one
 * @param i2 pointer to unsigned long long two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_ulonglong(const void *i1, const void *i2);

/**
 * Compares two integers of type uint16_t.
 *
 * @param i1 pointer to uint16_t one
 * @param i2 pointer to uint16_t two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_uint16(const void *i1, const void *i2);

/**
 * Compares two integers of type uint32_t.
 *
 * @param i1 pointer to uint32_t one
 * @param i2 pointer to uint32_t two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_uint32(const void *i1, const void *i2);

/**
 * Compares two integers of type uint64_t.
 *
 * @param i1 pointer to uint64_t one
 * @param i2 pointer to uint64_t two
 * @return -1, if *i1 is less than *i2, 0 if both are equal,
 * 1 if *i1 is greater than *i2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_uint64(const void *i1, const void *i2);

/**
 * Compares two real numbers of type float with precision 1e-6f.
 *
 * @param f1 pointer to float one
 * @param f2 pointer to float two
 * @return -1, if *f1 is less than *f2, 0 if both are equal,
 * 1 if *f1 is greater than *f2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_float(const void *f1, const void *f2);

/**
 * Compares two real numbers of type double with precision 1e-14.
 *
 * @param d1 pointer to double one
 * @param d2 pointer to double two
 * @return -1, if *d1 is less than *d2, 0 if both are equal,
 * 1 if *d1 is greater than *d2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_double(const void *d1, const void *d2);

/**
 * Compares the integer representation of two pointers.
 *
 * @param ptr1 pointer to pointer one (const intptr_t*)
 * @param ptr2 pointer to pointer two (const intptr_t*)
 * @return -1 if *ptr1 is less than *ptr2, 0 if both are equal,
 * 1 if *ptr1 is greater than *ptr2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_intptr(const void *ptr1, const void *ptr2);

/**
 * Compares the unsigned integer representation of two pointers.
 *
 * @param ptr1 pointer to pointer one (const uintptr_t*)
 * @param ptr2 pointer to pointer two (const uintptr_t*)
 * @return -1 if *ptr1 is less than *ptr2, 0 if both are equal,
 * 1 if *ptr1 is greater than *ptr2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_uintptr(const void *ptr1, const void *ptr2);

/**
 * Compares the pointers specified in the arguments without de-referencing.
 *
 * @param ptr1 pointer one
 * @param ptr2 pointer two
 * @return -1 if ptr1 is less than ptr2, 0 if both are equal,
 * 1 if ptr1 is greater than ptr2
 */
cx_attr_nonnull
cx_attr_nodiscard
int cx_cmp_ptr(const void *ptr1, const void *ptr2);

#ifdef __cplusplus
} // extern "C"
#endif

#endif //UCX_COMPARE_H