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- #------------------------------------------------------------------------------
- # $File: cafebabe,v 1.8 2009/09/19 16:28:08 christos Exp $
- # Cafe Babes unite!
- #
- # Since Java bytecode and Mach-O fat-files have the same magic number, the test
- # must be performed in the same "magic" sequence to get both right. The long
- # at offset 4 in a mach-O fat file tells the number of architectures; the short at
- # offset 4 in a Java bytecode file is the JVM minor version and the
- # short at offset 6 is the JVM major version. Since there are only
- # only 18 labeled Mach-O architectures at current, and the first released
- # Java class format was version 43.0, we can safely choose any number
- # between 18 and 39 to test the number of architectures against
- # (and use as a hack). Let's not use 18, because the Mach-O people
- # might add another one or two as time goes by...
- #
- 0 belong 0xcafebabe
- !:mime application/x-java-applet
- >4 belong >30 compiled Java class data,
- >>6 beshort x version %d.
- >>4 beshort x \b%d
- # Which is which?
- #>>4 belong 0x032d (Java 1.0)
- #>>4 belong 0x032d (Java 1.1)
- >>4 belong 0x002e (Java 1.2)
- >>4 belong 0x002f (Java 1.3)
- >>4 belong 0x0030 (Java 1.4)
- >>4 belong 0x0031 (Java 1.5)
- >>4 belong 0x0032 (Java 1.6)
- 0 belong 0xcafebabe
- >4 belong 1 Mach-O fat file with 1 architecture
- >4 belong >1
- >>4 belong <20 Mach-O fat file with %ld architectures
- 0 belong 0xcafed00d JAR compressed with pack200,
- >>5 byte x version %d.
- >>4 byte x \b%d
- !:mime application/x-java-pack200
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