jflopezfernandez / dec2bin

Decimal to binary command-line conversion utility.

dec2bin

Decimal to binary command-line conversion utility.

Usage

Internally, numbers are represented as mpz_t, which is GNU GMP's arbitrary- precision integral data type. Numbers of any size may therefore be represented, so, theoretically speaking, the limit is your computer's memory, and in more practical terms, the limit is how long you're willing to sit in front of your computer waiting for the result.

Examples

For simple conversions you can simply pass in your desired inputs.

$ ./dec2bin 845777
11001110011111010001

Should you wish to configure the output to look a little nicer, or at least make it easier to read, the current options available are --pretty-print and --group-size. The former pads the output to be even groups of n, where n is the group size, and the latter actually specifies a custom group size.

If you specify --pretty-print without setting a group size, the program will use the default, which is 4. If you specify a group size without actually requesting for the program to pretty-print your output, the program will disregard your request and print the output as if you had specified no options at all. I might change this in the future to allow the --group-size option to imply --pretty-print, but at the moment the program does exactly what you explicitly tell it to; nothing more, nothing less. I mean this literally, as specifying a group size without specifying the --pretty-print option will set the group size, but will not route the output through the subroutine that would use it.

Here is an example of a custom group size setting with a large input integer.

$ ./dec2bin --pretty-print --group-size 8 683543568763521656876541231
00000010 00110101 01101001 11111011 00011100 10110010 01000110 00110001 11110110 10110001 10100101 00101111

Building

The program uses the GNU Multiple Precision library to handle inputs of any size, so this is the only real requirement. Besides that, the application is written in C17-conforming standard C, so as long as you have a conforming C compiler you should have no problem building the application, aforementioned pre-requisites notwithstanding.

The makefile is currently set to my default options, so you cannot currently override any settings via the command-line. I apologize for this, but you may modify the makefile to allow for this, or you may simply edit it as you see fit.

Pull requests are welcome, and feel free to drop me a line if you have any problems, questions, concerns, bug reports, etc.