An implementation of Unix dc and POSIX bc with GNU and BSD extensions. Finished, but well-maintained.
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/*
* *****************************************************************************
*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2018-2021 Gavin D. Howard and contributors.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * 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.
*
* *****************************************************************************
*
* Definitions for processing command-line arguments.
*
*/
#ifndef BC_ARGS_H
#define BC_ARGS_H
#include <status.h>
#include <opt.h>
#include <vm.h>
/**
* Processes command-line arguments.
* @param argc How many arguments there are.
* @param argv The array of arguments.
* @param exit_exprs True if bc/dc should exit when there are expressions,
* false otherwise.
* @param scale A pointer to return the scale that the arguments set, if
* any.
* @param ibase A pointer to return the ibase that the arguments set, if
* any.
* @param obase A pointer to return the obase that the arguments set, if
* any.
*/
void
bc_args(int argc, char* argv[], bool exit_exprs, BcBigDig* scale,
BcBigDig* ibase, BcBigDig* obase);
#if BC_ENABLED
#if DC_ENABLED
/// Returns true if the banner should be quieted.
#define BC_ARGS_SHOULD_BE_QUIET (BC_IS_DC || vm->exprs.len > 1)
#else // DC_ENABLED
/// Returns true if the banner should be quieted.
#define BC_ARGS_SHOULD_BE_QUIET (vm->exprs.len > 1)
#endif // DC_ENABLED
#else // BC_ENABLED
/// Returns true if the banner should be quieted.
#define BC_ARGS_SHOULD_BE_QUIET (BC_IS_DC)
#endif // BC_ENABLED
// A reference to the list of long options.
extern const BcOptLong bc_args_lopt[];
#endif // BC_ARGS_H