You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
126 lines
4.1 KiB
126 lines
4.1 KiB
/*
|
|
* *****************************************************************************
|
|
*
|
|
* 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.
|
|
*
|
|
* *****************************************************************************
|
|
*
|
|
* The bc help text.
|
|
*
|
|
*/
|
|
|
|
usage: %s [options] [file...]
|
|
|
|
bc is a command-line, arbitrary-precision calculator with a Turing-complete
|
|
language. For details, use `man %s` or see the online documentation at
|
|
https://git.yzena.com/gavin/bc/src/tag/%s/manuals/bc/%s.1.md.
|
|
|
|
This bc is compatible with both the GNU bc and the POSIX bc spec. See the GNU bc
|
|
manual (https://www.gnu.org/software/bc/manual/bc.html) and bc spec
|
|
(http://pubs.opengroup.org/onlinepubs/9699919799/utilities/bc.html)
|
|
for details.
|
|
|
|
This bc has three differences to the GNU bc:
|
|
|
|
1) Arrays can be passed to the builtin "length" function to get the number of
|
|
elements currently in the array. The following example prints "1":
|
|
|
|
a[0] = 0
|
|
length(a[])
|
|
|
|
2) The precedence of the boolean "not" operator (!) is equal to that of the
|
|
unary minus (-), or negation, operator. This still allows POSIX-compliant
|
|
scripts to work while somewhat preserving expected behavior (versus C) and
|
|
making parsing easier.
|
|
3) This bc has many more extensions than the GNU bc does. For details, see the
|
|
man page or online documentation.
|
|
|
|
This bc also implements the dot (.) extension of the BSD bc.
|
|
|
|
Options:
|
|
|
|
-e expr --expression=expr
|
|
|
|
Run "expr" and quit. If multiple expressions or files (see below) are
|
|
given, they are all run before executing from stdin.
|
|
|
|
-f file --file=file
|
|
|
|
Run the bc code in "file" and exit. See above as well.
|
|
|
|
-g --global-stacks
|
|
|
|
Turn scale, ibase, and obase into stacks. This makes the value of each be
|
|
be restored on returning from functions. See the man page or online
|
|
documentation for more details.
|
|
|
|
-h --help
|
|
|
|
Print this usage message and exit.
|
|
|
|
-i --interactive
|
|
|
|
Force interactive mode.
|
|
|
|
-l --mathlib
|
|
|
|
Use predefined math routines:
|
|
|
|
s(expr) = sine of expr in radians
|
|
c(expr) = cosine of expr in radians
|
|
a(expr) = arctangent of expr, returning radians
|
|
l(expr) = natural log of expr
|
|
e(expr) = raises e to the power of expr
|
|
j(n, x) = Bessel function of integer order n of x
|
|
|
|
This bc may load more functions with these options. See the manpage or
|
|
online documentation for details.
|
|
|
|
-P --no-prompt
|
|
|
|
Disable the prompts in interactive mode.
|
|
|
|
-R --no-read-prompt
|
|
|
|
Disable the read prompt in interactive mode.
|
|
|
|
-q --quiet
|
|
|
|
Don't print version and copyright.
|
|
|
|
-s --standard
|
|
|
|
Error if any non-POSIX extensions are used.
|
|
|
|
-w --warn
|
|
|
|
Warn if any non-POSIX extensions are used.
|
|
|
|
-v --version
|
|
|
|
Print version information and copyright and exit.
|