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jco's Introduction

jco (Jonathan's Converter), for working with hex and binary numbers

Command line utility to quickly get info about the hex, binary and decimal representations of numbers, and the most common operations on the bits.

Installation and usage

pip install -r requirements.txt

Check that it works by running jco with no arguments

c:\path\to\repo>jco
Available commands:
        help: Help.
        one: Info about one number: jco one <number>
        two: Info about 2 numbers: jco two <a> <b>
        n: Info about 1 or 2 numbers (calls jco one or jco two)
        bf: jco bitfield <field:nbits,field:nbits,...,field:nbits> <num>

Available options (space-separated list of <option>=<value>):
        ('n', 'n_bits') -> Number of bits
        ('w', 'word_size') -> Word size
        ('o', 'overflow') -> Whether to overflow negative numbers
        ('f', 'format') -> Table format (compatible with tabulate package)
        ('m', 'msbfirst') -> Whether to put the most significant bit first in a bitstring

Then check that you can run some simple queries (jco can be called from anywhere)

>jco 0x1877
╒════════════════════════╤═══════╤═══════╤═══════════════╕
│                        │   Dec │ Hex   │           Bin │
╞════════════════════════╪═══════╪═══════╪═══════════════╡
│ A                      │  6263 │ 1877  │ 1100001110111 │
├────────────────────────┼───────┼───────┼───────────────┤
│ ~A (13 bits)           │  1928 │ 788   │ 0011110001000 │
├────────────────────────┼───────┼───────┼───────────────┤
│ twos_compl(A, 13 bits) │  1929 │ 789   │ 0011110001001 │
├────────────────────────┼───────┼───────┼───────────────┤
│ popcount(A)            │     8 │ 008   │ 0000000001000 │
├────────────────────────┼───────┼───────┼───────────────┤
│ nbits(A)               │    13 │ 00d   │ 0000000001101 │
├────────────────────────┼───────┼───────┼───────────────┤
│ A >> 4                 │   391 │ 187   │ 0000110000111 │
╘════════════════════════╧═══════╧═══════╧═══════════════╛

>jco 187 0x981 n=16 w=8
╒════════════════════════╤═══════════╤═══════════╤══════════════════╕
│                        │ Dec       │ Hex       │ Bin              │
╞════════════════════════╪═══════════╪═══════════╪══════════════════╡
│ A                      │ 187       │ 00bb      │ 0000000010111011 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ ~A (16 bits)           │ 65348     │ ff44      │ 1111111101000100 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ twos_compl(A, 16 bits) │ 65349     │ ff45      │ 1111111101000101 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ popcount(A)            │ 6         │ 0006      │ 0000000000000110 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ nbits(A)               │ 8         │ 0008      │ 0000000000001000 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A >> 8                 │ 0         │ 0000      │ 0000000000000000 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ B                      │ 2433      │ 0981      │ 0000100110000001 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ ~B (16 bits)           │ 63102     │ f67e      │ 1111011001111110 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ twos_compl(B, 16 bits) │ 63103     │ f67f      │ 1111011001111111 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ popcount(B)            │ 4         │ 0004      │ 0000000000000100 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ nbits(B)               │ 12        │ 000c      │ 0000000000001100 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ B >> 8                 │ 9         │ 0009      │ 0000000000001001 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A - B                  │ 59194     │ e73a      │ 1110011100111010 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ B - A                  │ 2246      │ 08c6      │ 0000100011000110 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A + B                  │ 2620      │ 0a3c      │ 0000101000111100 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A | B                  │ 2491      │ 09bb      │ 0000100110111011 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A & B                  │ 129       │ 0081      │ 0000000010000001 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A ^ B                  │ 2362      │ 093a      │ 0000100100111010 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A << 8 + B             │ 50305     │ c481      │ 1100010010000001 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ B << 8 + A             │ undefined │ undefined │ undefined        │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ A &~ B                 │ 59        │ 003b      │ 0000000000111011 │
├────────────────────────┼───────────┼───────────┼──────────────────┤
│ distance(A, B)         │ 6         │ 0006      │ 0000000000000110 │
╘════════════════════════╧═══════════╧═══════════╧══════════════════╛

>jco bf sign:1,exponent:8,fraction:23 0xfff1a238
╒═════╤════════════╤════════════════╤═════════════════════════╕
│     │  sign [1]  │  exponent [8]  │      fraction [23]      │
╞═════╪════════════╪════════════════╪═════════════════════════╡
│ Bin │     1      │    11111111    │ 11100011010001000111000 │
├─────┼────────────┼────────────────┼─────────────────────────┤
│ Dec │     1      │      255       │         7447096         │
├─────┼────────────┼────────────────┼─────────────────────────┤
│ Hex │     1      │       ff       │         71a238          │
╘═════╧════════════╧════════════════╧═════════════════════════╛

That's all it does!

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