2 #------------------------------------------------------------------------------
3 # $File: cafebabe,v 1.8 2009/09/19 16:28:08 christos Exp $
6 # Since Java bytecode and Mach-O fat-files have the same magic number, the test
7 # must be performed in the same "magic" sequence to get both right. The long
8 # at offset 4 in a mach-O fat file tells the number of architectures; the short at
9 # offset 4 in a Java bytecode file is the JVM minor version and the
10 # short at offset 6 is the JVM major version. Since there are only
11 # only 18 labeled Mach-O architectures at current, and the first released
12 # Java class format was version 43.0, we can safely choose any number
13 # between 18 and 39 to test the number of architectures against
14 # (and use as a hack). Let's not use 18, because the Mach-O people
15 # might add another one or two as time goes by...
18 !:mime application/x-java-applet
19 >4 belong >30 compiled Java class data,
20 >>6 beshort x version %d.
23 #>>4 belong 0x032d (Java 1.0)
24 #>>4 belong 0x032d (Java 1.1)
25 >>4 belong 0x002e (Java 1.2)
26 >>4 belong 0x002f (Java 1.3)
27 >>4 belong 0x0030 (Java 1.4)
28 >>4 belong 0x0031 (Java 1.5)
29 >>4 belong 0x0032 (Java 1.6)
33 >4 belong 1 Mach-O fat file with 1 architecture
35 >>4 belong <20 Mach-O fat file with %ld architectures
37 0 belong 0xcafed00d JAR compressed with pack200,
38 >>5 byte x version %d.
40 !:mime application/x-java-pack200