00mjk / pcalc

command line util for doing hex/dec/oct/bin math quickly

pcalc: The Programmer's calculator

There was always a loophole when it came to a need to covert between hexadecimal / decimal / octal / binary.

Especially if it involved an operation like 0x1234 + 0x20. It took a lot of hard work, and mostly a good pocket calculator.

Features

• Full math parser, parentheses, add, sub, mult, div, exponential
• Automatic conversion between HEX DEC OCT BIN numbers
• Mixing different bases in one expression
• Definable variables
• Math constants (E PI ...)
• Built in math functions (sin/cos/sqrt ...)

Examples

Here are bunch of common examples.

See the SYNTAX.md file for the full syntax. You can also run pcalc for a local reference.

$ pcalc 0x300
        768                     0x300                   0y1100000000

# Note: Shell expansion on the '*' char requires the single quotes.
$ pcalc '0x300 + 3 * 3'
        777                     0x309                   0y1100001001

$ pcalc sqrt 2
        1.414213562373095       0x1                     0y1

# Note: The single quotes are to keep the shell happy with the () characters.
$ pcalc 'sqrt(2)'
        1.414213562373095       0x1                     0y1

$ pcalc 0x12 or 23
        23                      0x17                    0y10111

# To execute a script, use the `@` prefix on the filename.
$ pcalc @pcalc.001

Building & Installing

To compile the project, simply use make:

$ make

Note: Some platforms might not provide flex or -lfl. You will need to adjust the Makefile accordingly.

To install it, you can do:

$ sudo make install

Testing

To run the unittests, use:

$ make check

Note: Depending on the precision of floating point math in your system, some unittests might fail. It's OK to ignore those specific failures.

Feedback

Please use the GH issue tracker for any updates/ports/suggestions. Feedback always welcome!

https://github.com/vapier/pcalc/issues

License

This project is licensed under GPLv2 (or later). The full text can be found in the COPYING file.