bits - convert bit masks from/to various formats

NAME SYNOPSIS DESCRIPTION POSITIONAL ARGUMENTS OPTIONS CONVERSION MODE EXAMPLES AUTHORS REPORTING BUGS AVAILABILITY

NAME

bits − convert bit masks from/to various formats

SYNOPSIS

bits [−h] [−V] [−w <NUM>] [<MODE>] [<MASK_OR_LIST>...]

DESCRIPTION

The bits utility converts bit masks into various formats. It supports combining multiple masks together using bitwise operations.

POSITIONAL ARGUMENTS

<MASK_OR_LIST>

A set of bits specified as a hexadecimal mask value (e.g. 0xeec2) or as a comma−separated list of bit IDs.

If no argument is specified, the sets of bits will be read from standard input; one group per line.

Consecutive ids can be compressed as ranges (e.g. 5,6,7,8,9,10 → 5−10).

Optionally, if an argument starts with a comma, it will be parsed as a single hexadecimal mask split in 32bit groups (e.g. ,00014000,00000000,00020000 → 17,78,80).

By default all groups will be OR’ed together. If a group has one of the following prefixes, it will be combined with the resulting mask using a different binary operation:

&<MASK_OR_LIST>

The group will be combined with a binary AND operation. I.e. all bits that are set to 1 in the group AND the combined groups so far will be preserved to 1. All other bits will be reset to 0.

ˆ<MASK_OR_LIST>

The group will be combined with a binary XOR operation. I.e. all bits that are set to 1 in the group AND to 0 the combined groups so far (or the other way around) will be set to 1. Bits that are both to 1 or both to 0 will be reset to 0.

˜<MASK_OR_LIST>

All bits set to 1 in the group will be cleared (reset to 0) in the combined groups so far.

OPTIONS

−w <NUM>, −−width <NUM>

Maximum number of bits in the masks handled by bits (default 8192). Any bit larger than this number will be truncated.

−h, −−help

Display help text and exit.

−V, −−version

Display version and exit.

CONVERSION MODE

One of the following conversion modes can be specified. If not specified, it defaults to −m, −−mask.

−m, −−mask

Print the combined args as a hexadecimal mask value (default).

−g, −−grouped−mask

Print the combined args as a hexadecimal mask value in 32bit comma separated groups.

−b, −−binary

Print the combined args as a binary mask value.

−l, −−list

Print the combined args as a list of bit IDs. Consecutive IDs are compressed as ranges.

EXAMPLES

˜$ bits −−mask 4,5−8 16,30
0x400101f0

˜$ bits −−list 0xeec2
1,6,7,9−11,13−15

˜$ bits −−binary 4,5−8 16,30
0b100_0000_0000_0001_0000_0001_1111_0000

˜$ bits −−list ,00300000,03000000,30000003
0,1,28,29,56,57,84,85

˜$ bits −−list 1,2,3,4 ˜3−10
1,2

˜$ bits −−list 1,2,3,4 ˆ3−10
1,2,5−10

˜$ bits −−grouped−mask 2,22,74,79
8400,00000000,00400004

˜$ bits −−width 64 −−list 2,22,74,79
2,22