mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-06 16:40:47 +00:00
aa339f1d5d
This update improves the implementation of the power function p() and adds 3 new functions to the extended math library: min(), max(), and i2rand(). (cherry picked from commit 0b4a06ab29a0da80f6cb5c99189054cb8e2f756c)
370 lines
6.7 KiB
C
370 lines
6.7 KiB
C
/*
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* *****************************************************************************
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2018-2023 Gavin D. Howard and contributors.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* *****************************************************************************
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*
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* The public header for the bc library.
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*
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*/
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#ifndef BC_BCL_H
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#define BC_BCL_H
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#include <stdbool.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <stdint.h>
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#ifndef NDEBUG
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#define BC_DEBUG (1)
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#else // NDEBUG
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#define BC_DEBUG (0)
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#endif // NDEBUG
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#ifdef _WIN32
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#include <Windows.h>
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#include <BaseTsd.h>
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#include <stdio.h>
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#include <io.h>
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#endif // _WIN32
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#ifdef _WIN32
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#define ssize_t SSIZE_T
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#endif // _WIN32
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#define BCL_SEED_ULONGS (4)
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#define BCL_SEED_SIZE (sizeof(long) * BCL_SEED_ULONGS)
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// For some reason, LONG_BIT is not defined in some versions of gcc.
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// I define it here to the minimum accepted value in the POSIX standard.
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#ifndef LONG_BIT
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#define LONG_BIT (32)
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#endif // LONG_BIT
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#ifndef BC_LONG_BIT
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#define BC_LONG_BIT LONG_BIT
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#endif // BC_LONG_BIT
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#if BC_LONG_BIT > LONG_BIT
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#error BC_LONG_BIT cannot be greater than LONG_BIT
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#endif // BC_LONG_BIT > LONG_BIT
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// For more information about the items here, see the either the
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// manuals/bcl.3.md or manuals/bcl.3 manuals.
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// BclBigDig is a fixed-size integer type that bcl can convert numbers to.
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//
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// BclRandInt is the type of fixed-size integer natively returned by the
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// pseudo-random number generator.
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#if BC_LONG_BIT >= 64
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typedef uint64_t BclBigDig;
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typedef uint64_t BclRandInt;
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#elif BC_LONG_BIT >= 32
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typedef uint32_t BclBigDig;
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typedef uint32_t BclRandInt;
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#else
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#error BC_LONG_BIT must be at least 32
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#endif // BC_LONG_BIT >= 64
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#ifndef BC_ENABLE_LIBRARY
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#define BC_ENABLE_LIBRARY (1)
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#endif // BC_ENABLE_LIBRARY
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#if BC_ENABLE_LIBRARY
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typedef enum BclError
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{
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BCL_ERROR_NONE,
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BCL_ERROR_INVALID_NUM,
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BCL_ERROR_INVALID_CONTEXT,
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BCL_ERROR_SIGNAL,
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BCL_ERROR_MATH_NEGATIVE,
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BCL_ERROR_MATH_NON_INTEGER,
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BCL_ERROR_MATH_OVERFLOW,
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BCL_ERROR_MATH_DIVIDE_BY_ZERO,
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BCL_ERROR_PARSE_INVALID_STR,
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BCL_ERROR_FATAL_ALLOC_ERR,
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BCL_ERROR_FATAL_UNKNOWN_ERR,
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BCL_ERROR_NELEMS,
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} BclError;
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typedef struct BclNumber
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{
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size_t i;
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} BclNumber;
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struct BclCtxt;
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typedef struct BclCtxt* BclContext;
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BclError
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bcl_start(void);
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void
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bcl_end(void);
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BclError
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bcl_init(void);
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void
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bcl_free(void);
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bool
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bcl_abortOnFatalError(void);
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void
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bcl_setAbortOnFatalError(bool abrt);
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bool
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bcl_leadingZeroes(void);
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void
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bcl_setLeadingZeroes(bool leadingZeroes);
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bool
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bcl_digitClamp(void);
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void
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bcl_setDigitClamp(bool digitClamp);
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void
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bcl_gc(void);
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BclError
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bcl_pushContext(BclContext ctxt);
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void
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bcl_popContext(void);
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BclContext
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bcl_context(void);
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BclContext
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bcl_ctxt_create(void);
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void
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bcl_ctxt_free(BclContext ctxt);
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void
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bcl_ctxt_freeNums(BclContext ctxt);
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size_t
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bcl_ctxt_scale(BclContext ctxt);
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void
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bcl_ctxt_setScale(BclContext ctxt, size_t scale);
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size_t
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bcl_ctxt_ibase(BclContext ctxt);
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void
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bcl_ctxt_setIbase(BclContext ctxt, size_t ibase);
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size_t
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bcl_ctxt_obase(BclContext ctxt);
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void
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bcl_ctxt_setObase(BclContext ctxt, size_t obase);
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BclError
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bcl_err(BclNumber n);
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BclNumber
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bcl_num_create(void);
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void
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bcl_num_free(BclNumber n);
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bool
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bcl_num_neg(BclNumber n);
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void
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bcl_num_setNeg(BclNumber n, bool neg);
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size_t
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bcl_num_scale(BclNumber n);
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BclError
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bcl_num_setScale(BclNumber n, size_t scale);
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size_t
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bcl_num_len(BclNumber n);
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BclError
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bcl_copy(BclNumber d, BclNumber s);
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BclNumber
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bcl_dup(BclNumber s);
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BclError
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bcl_bigdig(BclNumber n, BclBigDig* result);
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BclError
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bcl_bigdig_keep(BclNumber n, BclBigDig* result);
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BclNumber
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bcl_bigdig2num(BclBigDig val);
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BclNumber
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bcl_add(BclNumber a, BclNumber b);
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BclNumber
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bcl_add_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_sub(BclNumber a, BclNumber b);
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BclNumber
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bcl_sub_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_mul(BclNumber a, BclNumber b);
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BclNumber
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bcl_mul_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_div(BclNumber a, BclNumber b);
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BclNumber
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bcl_div_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_mod(BclNumber a, BclNumber b);
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BclNumber
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bcl_mod_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_pow(BclNumber a, BclNumber b);
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BclNumber
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bcl_pow_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_lshift(BclNumber a, BclNumber b);
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BclNumber
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bcl_lshift_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_rshift(BclNumber a, BclNumber b);
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BclNumber
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bcl_rshift_keep(BclNumber a, BclNumber b);
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BclNumber
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bcl_sqrt(BclNumber a);
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BclNumber
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bcl_sqrt_keep(BclNumber a);
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BclError
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bcl_divmod(BclNumber a, BclNumber b, BclNumber* c, BclNumber* d);
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BclError
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bcl_divmod_keep(BclNumber a, BclNumber b, BclNumber* c, BclNumber* d);
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BclNumber
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bcl_modexp(BclNumber a, BclNumber b, BclNumber c);
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BclNumber
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bcl_modexp_keep(BclNumber a, BclNumber b, BclNumber c);
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ssize_t
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bcl_cmp(BclNumber a, BclNumber b);
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void
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bcl_zero(BclNumber n);
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void
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bcl_one(BclNumber n);
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BclNumber
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bcl_parse(const char* restrict val);
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char*
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bcl_string(BclNumber n);
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char*
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bcl_string_keep(BclNumber n);
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BclNumber
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bcl_irand(BclNumber a);
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BclNumber
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bcl_irand_keep(BclNumber a);
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BclNumber
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bcl_frand(size_t places);
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BclNumber
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bcl_ifrand(BclNumber a, size_t places);
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BclNumber
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bcl_ifrand_keep(BclNumber a, size_t places);
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BclError
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bcl_rand_seedWithNum(BclNumber n);
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BclError
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bcl_rand_seedWithNum_keep(BclNumber n);
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BclError
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bcl_rand_seed(unsigned char seed[BCL_SEED_SIZE]);
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void
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bcl_rand_reseed(void);
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BclNumber
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bcl_rand_seed2num(void);
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BclRandInt
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bcl_rand_int(void);
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BclRandInt
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bcl_rand_bounded(BclRandInt bound);
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#endif // BC_ENABLE_LIBRARY
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#endif // BC_BCL_H
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