Ted Mielczarek 555cf95f52 bug 518641 - fix the "unify" script to properly handle Java .class files. r=bsmedberg ...

Java .class files and Mach-O fat binaries use the same 4-byte magic
number at the start of the file. 'unify' uses the magic number to detect
Mach-O binaries, so it chokes on Java .class files. This change makes us
use the same heuristic as file(1), which is to check the second 4 bytes
in the file. Java class files put a version number there, and Mach-O
fat binaries put the number of contained architectures there. Conveniently,
Mach defines only 18 architectures, and Java's lowest shipping version
number is 43, so there's no overlap in valid values.

--HG--
extra : rebase_source : 84f5382bca6fa4bde721686f029514a41dfaf6b4

2009-09-29 08:31:50 -04:00

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