| blob | e25c974dd55b984ff9db25ac01e049afc2d9624b |
1 #------------------------------------------------------------------------------
2 # Cafe Babes unite!
3 #
4 # Since Java bytecode and Mach-O fat-files have the same magic number, the test
5 # must be performed in the same "magic" sequence to get both right. The long
6 # at offset 4 in a mach-O fat file tells the number of architectures; the short at
7 # offset 4 in a Java bytecode file is the JVM minor version and the
8 # short at offset 6 is the JVM major version. Since there are only
9 # only 18 labeled Mach-O architectures at current, and the first released
10 # Java class format was version 43.0, we can safely choose any number
11 # between 18 and 39 to test the number of architectures against
12 # (and use as a hack). Let's not use 18, because the Mach-O people
13 # might add another one or two as time goes by...
14 #
15 0 belong 0xcafebabe
16 !:mime application/x-java-applet
17 >4 belong >30 compiled Java class data,
18 >>6 beshort x version %d.
19 >>4 beshort x \b%d
20 # Which is which?
21 #>>4 belong 0x032d (Java 1.0)
22 #>>4 belong 0x032d (Java 1.1)
23 >>4 belong 0x002e (Java 1.2)
24 >>4 belong 0x002f (Java 1.3)
25 >>4 belong 0x0030 (Java 1.4)
26 >>4 belong 0x0031 (Java 1.5)
27 >>4 belong 0x0032 (Java 1.6)
30 0 belong 0xcafebabe
31 >4 belong 1 Mach-O fat file with 1 architecture
32 >4 belong >1
33 >>4 belong <20 Mach-O fat file with %ld architectures
35 0 belong 0xcafed00d JAR compressed with pack200,
36 >>5 byte x version %d.
37 >>4 byte x \b%d
38 !:mime application/x-java-pack200