freebsd-skq/contrib/file/Magdir/smile
2012-04-19 03:20:13 +00:00

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#------------------------------------------------------------------------------
# $File: smile,v 1.1 2011/08/17 17:37:18 christos Exp $
# smile: file(1) magic for Smile serialization
#
# The Smile serialization format uses a 4-byte header:
#
# Constant byte #0: 0x3A (ASCII ':')
# Constant byte #1: 0x29 (ASCII ')')
# Constant byte #2: 0x0A (ASCII linefeed, '\n')
# Variable byte #3, consisting of bits:
# Bits 4-7 (4 MSB): 4-bit version number
# Bits 3: Reserved
# Bit 2 (mask 0x04): Whether raw binary (unescaped 8-bit) values may be present in content
# Bit 1 (mask 0x02): Whether shared String value checking was enabled during encoding, default false
# Bit 0 (mask 0x01): Whether shared property name checking was enabled during encoding, default true
#
# Reference: http://wiki.fasterxml.com/SmileFormatSpec
# Created by: Pierre-Alexandre Meyer <pierre@mouraf.org>
# Detection
0 string :)\n Smile binary data
# Versioning
>3 byte&0xF0 x version %d:
# Properties
>3 byte&0x04 0x04 binary raw,
>3 byte&0x04 0x00 binary encoded,
>3 byte&0x02 0x02 shared String values enabled,
>3 byte&0x02 0x00 shared String values disabled,
>3 byte&0x01 0x01 shared field names enabled
>3 byte&0x01 0x00 shared field names disabled