#    This file is part of Metasm, the Ruby assembly manipulation suite
#    Copyright (C) 2006-2009 Yoann GUILLOT
#
#    Licence is LGPL, see LICENCE in the top-level directory


module Metasm
	# root directory for metasm files
	# used by some scripts, eg to find samples/dasm-plugin directory
	Metasmdir = File.dirname(__FILE__)
	# add it to the ruby library path
	$: << Metasmdir

	# constants defined in the same file as another
	Const_autorequire_equiv = {
		'X86' => 'Ia32', 'PPC' => 'PowerPC',
		'X64' => 'X86_64', 'AMD64' => 'X86_64',
		'UniversalBinary' => 'MachO', 'COFFArchive' => 'COFF',
		'DEY' => 'DEX',
		'PTrace' => 'LinOS', 'FatELF' => 'ELF',
		'LoadedELF' => 'ELF', 'LoadedPE' => 'PE',
		'LoadedAutoExe' => 'AutoExe',
		'LinuxRemoteString' => 'LinOS',
		'LinDebugger' => 'LinOS',
		'WinAPI' => 'WinOS',
		'WindowsRemoteString' => 'WinOS', 'WinDbgAPI' => 'WinOS',
		'WinDebugger' => 'WinOS',
		'GdbRemoteString' => 'GdbClient', 'GdbRemoteDebugger' => 'GdbClient',
		'DecodedInstruction' => 'Disassembler', 'DecodedFunction' => 'Disassembler',
		'InstructionBlock' => 'Disassembler',
	}

	# files to require to get the definition of those constants
	Const_autorequire = {
		'Ia32' => 'ia32', 'MIPS' => 'mips', 'PowerPC' => 'ppc', 'ARM' => 'arm',
		'X86_64' => 'x86_64', 'Sh4' => 'sh4', 'Dalvik' => 'dalvik',
		'C' => 'compile_c',
		'MZ' => 'exe_format/mz', 'PE' => 'exe_format/pe',
		'ELF' => 'exe_format/elf', 'COFF' => 'exe_format/coff',
		'Shellcode' => 'exe_format/shellcode', 'AutoExe' => 'exe_format/autoexe',
		'AOut' => 'exe_format/a_out', 'MachO' => 'exe_format/macho',
		'DEX' => 'exe_format/dex',
		'NDS' => 'exe_format/nds', 'XCoff' => 'exe_format/xcoff',
		'Bflt' => 'exe_format/bflt', 'Dol' => 'exe_format/dol',
		'Gui' => 'gui',
		'WindowsExports' => 'os/windows_exports',
		'GNUExports' => 'os/gnu_exports',
		'LinOS' => 'os/linux', 'WinOS' => 'os/windows',
		'GdbClient' => 'os/remote',
		'Disassembler' => 'disassemble',
		'Decompiler' => 'decompile',
		'DynLdr' => 'dynldr',
	}

	# use the Module.autoload ruby functionnality to load framework components on demand
	Const_autorequire.each { |cst, file|
		autoload cst, File.join('metasm', file)
	}

	Const_autorequire_equiv.each { |cst, eqv|
		file = Const_autorequire[eqv]
		autoload cst, File.join('metasm', file)
	}
end

# load Metasm core files
%w[main encode decode render exe_format/main os/main].each { |f|
	require File.join('metasm', f)
}


# remove an 1.9 warning, couldn't find a compatible way...
if Hash.new.respond_to?(:key)
	puts "using ruby1.9 workaround for Hash#index warning" if $DEBUG
	class Hash
		alias index_premetasm index rescue nil
		undef index rescue nil
		alias index key
	end
end