Perl Pack Unpack Printf Sprintf Cheat Sheet

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Made at http://www.catonmat.net Cheat sheet contains all the predefined/special variables of Perl. They have been collected form `perldoc perlvar' manual page. Visit http://www.catonmat.net for more cheat sheets!

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Perl pack/unpack Summary
Usage:
• pack TEMPLATE, LIST
• unpack TEMPLATE, EXPR

Template parameter summary:
Parameter Description
a A string with arbitrary binary data, will be null padded.
A A text (ASCII) string, will be space padded.
Z A null terminated (ASCIZ) string, will be null padded.
b A bit string (ascending bit order inside each byte, like vec()).
B A bit string (descending bit order inside each byte).
h A hex string (low nibble first).
H A hex string (high nibble first).
c A signed char value.
C An unsigned char value. Only does bytes. See U for Unicode.
s A signed short value.
An unsigned short value. (This 'short' is _exactly_ 16 bits, which may differ from what a local C compiler calls
S
'short

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Perl Pack Unpack Printf Sprintf Cheat Sheet

1. Perl pack/unpack Summary Usage: • pack TEMPLATE, LIST • unpack TEMPLATE, EXPR Template parameter summary: Parameter Description a A string with arbitrary binary data, will be null padded. A A text (ASCII) string, will be space padded. Z A null terminated (ASCIZ) string, will be null padded. b A bit string (ascending bit order inside each byte, like vec()). B A bit string (descending bit order inside each byte). h A hex string (low nibble first). H A hex string (high nibble first). c A signed char value. C An unsigned char value. Only does bytes. See U for Unicode. s A signed short value. An unsigned short value. (This 'short' is _exactly_ 16 bits, which may differ from what a local C compiler calls S 'short

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