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Decompilation would not preserve the original style.

Of course it would. If a symbol table was present, you'd even end up with the same variable names.

Decompilation would not preserve stylistic things like indentation and brace usage. With optimized compilers, it's getting pretty hard for a decompiler to actually figure out the original input source statement. The result of a decompile, when again compiled, may indeed produce the same object; but the original and decompiled source code may look radically different. The RC4 source code contains at least one example of a coding idiom that would almost certainly decompile differently. In a couple instances, the posted alleged-RC4 source takes modulo-256 of a particular value. A compiler would in almost all cases emit code which did a simple logical-AND with 0xff; when decompiled, the C code would reflect that logical-AND rather than a mod-256 operation. It looked like real source to me, rather than decompiled. Jason