perl-Data-Hexify

Perl extension for hexdumping arbitrary data

This module exports one subroutine: 'Hexify'. 'Hexify' formats arbitrary (possible binary) data into a format suitable for hex dumps in the style of 'xd' or 'hexl'. The first, or only, argument to 'Hexify' contains the data, or a reference to the data, to be hexified. Hexify will return a string that prints as follows: 0000: 70 61 63 6b 61 67 65 20 44 61 74 61 3a 3a 48 65 package Data::He 0010: 78 69 66 79 3b 0a 0a 75 73 65 20 35 2e 30 30 36 xify;..use 5.006 and so on. At the left is the (hexadecimal) index of the data, then a number of hex bytes, followed by the chunk of data with unprintables replaced by periods. The optional second argument to 'Hexify' must be a hash or a hash reference, containing values for any of the following parameters: * first The first byte of the data to be processed. Default is to start from the beginning of the data. * length The number of bytes to be processed. Default is to proceed all data. * chunk The number of bytes to be processed per line of output. Default is 16. * group The number of bytes to be grouped together. Default is 1 (no grouping). If used, it must be a divisor of the chunk size. * duplicates When set, duplicate lines of output are suppressed and replaced by a single line reading '**SAME**'. Duplicate suppression is enabled by default. * showdata A reference to a subroutine that is used to produce a printable string from a chunk of data. By default, a subroutine is used that replaces unwanted bytes by periods. The subroutine gets the chunk of data passed as argument, and should return a printable string of at most 'chunksize' characters. * align Align the result to 'chunksize' bytes. This is relevant only when processing data not from the beginning. For example, when 'first' is 10, the result would become: 0000: ... 74 61 3a 3a 48 65 ta::He 0010: 78 69 66 79 3b ... 65 20 35 2e 30 30 36 xify;..use 5.006 ... and so on ... Alignment is on by default. Without alignment, the result would be: 000a: 74 61 3a 3a 48 ... 79 3b 0a 0a 75 73 65 ta::Hexify;..use 001a: 20 35 2e 30 30 ... 73 65 20 73 74 72 69 5.006;.use stri ... and so on ... * start Pretend that the data started at this byte (while in reality it starts at byte 'first'). The above example, with 'start => 0', becomes: 0000: 74 61 3a 3a 48 ... 79 3b 0a 0a 75 73 65 ta::Hexify;..use 0010: 20 35 2e 30 30 ... 73 65 20 73 74 72 69 5.006;.use stri ... and so on ...

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