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SwissCalc is a powerful interactive calculator for programmer whilst inside Vim. SwissCalc wants to achieve two goals:
- convenient
- powerful
SwissCalc preserve as mush Vim functionality as possible. You can edit, move, edit, yank expressions for SwissCalc by Vim. It's quite easy to open SwissCalc and edit expressions in Vim. SwissCalc has been tailored to act as a Read Eval Print Loop (REPL) and provides some convenient variables such as last evaluated result, pi, e and functions such as vars(), funcs(), help().
SwissCalc supports three data types: integer, float, string(yes, I am serious). SwissCalc also provides many operations such as bitwise operation, exponention, factorial. SwissCalc is supplied many built-in functions, too. You can all many math functions such as log(), sqrt(), sin(), asin(), many string functions to manipulate string, for example base64 encoding/decoding, md5/sha digest, regular expression, url encoding/decoding, time operattion. If you find that SwissCalc is missing functions that you would like to use, you can define your own functions easily by Python.
- Vim 7.0+ with +python.
- Python 2.7 installed.
SwissCalc supports Linux, Mac OS X and Windows.
Download the latest source from https://github.com/lightxue/SwissCalc
Extract (or copy) all of the files into your Vim runtime directory, ensuring that they are placed into the correct subdirectories.
Type :ScalcSplit to open a new window containing the SwissCalc buffer(other
open commands: :Scalc, :ScalcVSplit, :ScalcTab). SwissCalc closed when
all SwissCalc buffer closed.SwissCalc has been tailored to act as a Read Eval
Print Loop (REPL). That is, any command read at the prompt will be evaluated
after you press <CR> and the result printed back to you interactively.
SwissCalc support three data types: integer, float and string. Integer is not
arbitrary size, see Environment variable. Floating-point arithmetic is
IEEE754, which means float evaluation is not arbitrary precision.
Precedence Operator Associativity Description
0 = right Assignment
0 += -= right Assignment by sum and difference.
0 *= /= right Assignment by multiply and division.
0 %= **= right Assignment by modulus and exponent.
0 <<= >>= right Assignment by Arithmethc left and
right shift.
0 &= |= ^= right Assignment by bitwise(and, or, xor).
1 & | ^ left Bitwise (and, or, xor).
2 << >> left Arithmetic left and right shift.
3 + = left Addition and subtraction.
4 * / % left Multiplication, division and modulus.
5 ! right Factorial.
6 ** left Exponentiation.
You will find it is convenient to define variables when expression is complicated. SwissCalc will define a variable when you assign it. All variables are in the same global scope. That is all variables bound to a value until SwissCalc exit.
There are some built-in variables in SwissCalc.
Variable Description
_ Last evaluated result.
e Euler's number.
pi Ratio of any circle's circumference to its diameter in
Euclidean space.
phi Golden ratio. Useful when working with Fibonacci sequences.
SwissCalc is supplied with many built-in functions. Here are some of them.
Function Description
help Print document of the function
ff Search functions(built-in and user-defined) by regular
expression key. Print the Search result.
funcs Displays a list of all of the functions SwissCalc supported,
including built-in functions and user-defined functions.
vars Displays a list of all of the currently bound variables and
their assigned value.
env Displays a list of all of the environment variables and their
value.
setenv Set environment variable. It toggle value if value is not
given.
int Convent other data type to integer. When converting a string,
use the optional base.
float Convert other data type to float.
str Convert other data type to string.
Define functions for SwissCalc is quite easy. Add all the functions you want to
autoload/custom.py. They will be loaded when the SwissCalc buffer created.
There are something you should know before defining your own functions:
- Functions should be writed by Python.
- All parameters and return values should be integer, float or string.
- Strong recommend writing function's docstring, so you can get help by help().
- Everything send to stdout will redirect to the SwissCalc buffer, but stderr will not.
- User-defined functions will overwrite built-in functions if they have the same name.
- Raising exceptions is valid because SwissCalc will catch all user-define exceptins.
If you do add functions that you think others would benefit from, please send me patches.
You can adjust SwissCalc by environment variables. Environment variables are bound to different scope with user-defined variables, so don't worry your variables will overwrite environment variables when they have the same name.
Variables Defualt Description
bin 0 Whether display binary mode when print integer.
oct 0 Whether display octal mode when print integer.
dec 1 Whether display decimal mode when print integer.
hex 0 Whether display hexadecimal mode when print integer.
word 8 Number of bytes that handling integer.
signed 1 Whether integer is signed.
- :Scalc ==> open SwissCalc in a current window
- :ScalcSplit ==> open SwissCalc in a horizontal window
- :ScalcVSplit ==> open SwissCalc in a vertical window
- :ScalcTab ==> open SwissCalc in a new tab
Version Time Description
1.0.0 2013-12-07 First release, hope you like it.
0.9.0 2013-11-18 Beta version.
Author; Light Xue
Email: bkmgtp@gmail.com
Website: https://github.com/lightxue/SwissCalc
Contributing to SwissCalc couldn't be easier. If you wish to do development work on the code base or documentation simply fork the git repository and submit a pull request to me. If you discover a bug or wish to submit a feature request add an issue to the github page. Anything else, feel free to email me.
Bugs, suggestions and patches are all very welcome. If you find issues with VimCalc please add them to the issues page on the github project.
Check out the latest from github at https://github.com/lightxue/SwissCalc
Thanks to below people
name Reasion
Guido van Rossum My whole world the simpler and more beautiful
because of Python.
Bram Moolenaar Thank your for your Vim which makes me enjoy coding.
David Beazley Your PLY makes SwissCalc simpler and better.
Greg Sexton SwissCalc would not exist without VimCalc.
SwissCalc is released under the GPLv3. See http://gplv3.fsf.org/