Command line utility to quickly get info about the hex, binary and decimal representations of numbers, and the most common operations on the bits. This is particularly helpful when looking at hex dumps from some source when you're not sure which bits go where.
- Download the latest release for your OS/arch from https://github.com/jonathangjertsen/jco-go/releases/latest
- Unpack the tar.gz to get the
jcoexecutable - Move it to some directory that is on the PATH
- Test it by running
jco -v, it should print the version of the latest release.
Here is the output of jco -h:
jco (Jonathan's converter) v1.0.1
Usage:
Show information about <number>
jco <number>
Show information about how <number1> and <number2> relate
jco <number1> <number2>
Like the above, but treat numbers as 16-bit
jco <number1> <number2> -b 16
Show this help screen
jco --help
Show one-liner version
jco --version
Below is a list of the operations when running jco <number>:
twos_complement: Two's complement (depends on bit width)
popcount: Number of bits that are 1
clz: Number of leading zeros
nbits: Number of bits needed to represent the number
reverse_bitorder Reverses the bit order within each byte (0b11100011 -> 0b11000111)
reverse_nibbleorder Reverses the nibble order within each byte (0xab -> 0xba)
reverse_byteorder Reverses the byte order
reverse_bitstring Interprets the input as a stream of bits, and reverses them.
Equivalent to reverse_bitorder followed by reverse_byteorder.
You'll want to supply either 1 or 2 numbers. Here are some examples:
jco 1877 0x4a5e
FORMULA | DECIMAL HEXADECIMAL BINARY
1877 | 1877 0x00000755 0b00000000000000000000011101010101
0x4a5e | 19038 0x00004a5e 0b00000000000000000100101001011110
1877 + 0x4a5e | 20915 0x000051b3 0b00000000000000000101000110110011
1877 | 0x4a5e | 20319 0x00004f5f 0b00000000000000000100111101011111
1877 & 0x4a5e | 596 0x00000254 0b00000000000000000000001001010100
1877 ^ 0x4a5e | 19723 0x00004d0b 0b00000000000000000100110100001011
1877 ^~ 0x4a5e | 4294947572 0xffffb2f4 0b11111111111111111011001011110100
1877 - 0x4a5e | 4294950135 0xffffbcf7 0b11111111111111111011110011110111
1877 &~ 0x4a5e | 1281 0x00000501 0b00000000000000000000010100000001
1877 >> 0x4a5e | 0 0x00000000 0b00000000000000000000000000000000
1877 << 0x4a5e | 0 0x00000000 0b00000000000000000000000000000000
0x4a5e - 1877 | 17161 0x00004309 0b00000000000000000100001100001001
0x4a5e &~ 1877 | 18442 0x0000480a 0b00000000000000000100100000001010
0x4a5e >> 1877 | 0 0x00000000 0b00000000000000000000000000000000
0x4a5e << 1877 | 0 0x00000000 0b00000000000000000000000000000000
jco 1877 0x4a5e -b 16
FORMULA | DECIMAL HEXADECIMAL BINARY
1877 | 1877 0x0755 0b0000011101010101
0x4a5e | 19038 0x4a5e 0b0100101001011110
1877 + 0x4a5e | 20915 0x51b3 0b0101000110110011
1877 | 0x4a5e | 20319 0x4f5f 0b0100111101011111
1877 & 0x4a5e | 596 0x0254 0b0000001001010100
1877 ^ 0x4a5e | 19723 0x4d0b 0b0100110100001011
1877 ^~ 0x4a5e | 45812 0xb2f4 0b1011001011110100
1877 - 0x4a5e | 48375 0xbcf7 0b1011110011110111
1877 &~ 0x4a5e | 1281 0x0501 0b0000010100000001
1877 >> 0x4a5e | 0 0x0000 0b0000000000000000
1877 << 0x4a5e | 0 0x0000 0b0000000000000000
0x4a5e - 1877 | 17161 0x4309 0b0100001100001001
0x4a5e &~ 1877 | 18442 0x480a 0b0100100000001010
0x4a5e >> 1877 | 0 0x0000 0b0000000000000000
0x4a5e << 1877 | 0 0x0000 0b0000000000000000
jco 0x1877
FORMULA | DECIMAL HEXADECIMAL BINARY
0x1877 | 6263 0x00001877 0b00000000000000000001100001110111
~0x1877 | 4294961032 0xffffe788 0b11111111111111111110011110001000
twos_complement(0x1877) | 4294961033 0xffffe789 0b11111111111111111110011110001001
popcount(0x1877) | 8 0x00000008 0b00000000000000000000000000001000
clz(0x1877) | 19 0x00000013 0b00000000000000000000000000010011
nbits(0x1877) | 13 0x0000000d 0b00000000000000000000000000001101
reverse_bitstring(0x1877) | 3994550272 0xee180000 0b11101110000110000000000000000000
reverse_bitorder(0x1877) | 6382 0x000018ee 0b00000000000000000001100011101110
reverse_byteorder(0x1877) | 1998061568 0x77180000 0b01110111000110000000000000000000
reverse_nibbleorder(0x1877) | 33143 0x00008177 0b00000000000000001000000101110111
jco 1877
FORMULA | DECIMAL HEXADECIMAL BINARY
1877 | 1877 0x00000755 0b00000000000000000000011101010101
~1877 | 4294965418 0xfffff8aa 0b11111111111111111111100010101010
twos_complement(1877) | 4294965419 0xfffff8ab 0b11111111111111111111100010101011
popcount(1877) | 7 0x00000007 0b00000000000000000000000000000111
clz(1877) | 21 0x00000015 0b00000000000000000000000000010101
nbits(1877) | 11 0x0000000b 0b00000000000000000000000000001011
reverse_bitstring(1877) | 2866806784 0xaae00000 0b10101010111000000000000000000000
reverse_bitorder(1877) | 57514 0x0000e0aa 0b00000000000000001110000010101010
reverse_byteorder(1877) | 1426522112 0x55070000 0b01010101000001110000000000000000
reverse_nibbleorder(1877) | 28757 0x00007055 0b00000000000000000111000001010101
That's all it does!