75 lines
1.4 KiB
Ruby
75 lines
1.4 KiB
Ruby
#!/usr/bin/env ruby
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# This file is part of Metasm, the Ruby assembly manipulation suite
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# Copyright (C) 2007 Yoann GUILLOT
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#
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# Licence is LGPL, see LICENCE in the top-level directory
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synclen = 6
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ctxlen = 16
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file1 = ('x'*ctxlen) + File.read(ARGV.shift)
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file2 = ('x'*ctxlen) + File.read(ARGV.shift)
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count1 = count2 = ctxlen
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# prints the string in 80 cols
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# with the first column filled with +pfx+
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def show(pfx, str)
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loop do
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if str.length > 79
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len = 79 - str[0...79][/\S+$/].to_s.length
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len = 79 if len == 0
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puts pfx + str[0...len]
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str = str[len..-1]
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else
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puts pfx + str
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break
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end
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end
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end
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loop do
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w1 = file1[count1]
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w2 = file2[count2]
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break if not w1 and not w2
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if w1 == w2
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count1 += 1
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count2 += 1
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else
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diff1 = diff2 = nil
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catch(:resynced) {
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1000.times { |depth|
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(-depth..depth).map { |d|
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if d == 0
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[depth, depth]
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elsif d < 0
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[depth, depth+d]
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elsif d > 0
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[depth-d, depth]
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end
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}.each { |dc1, dc2|
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next if !(0...synclen).all? { |i| file1[count1 + dc1 + i] == file2[count2 + dc2 + i] }
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puts "@#{(count1-ctxlen).to_s 16} #{(count2-ctxlen).to_s 16}"
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show ' ', file1[count1-ctxlen, ctxlen].inspect
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if dc1 > 0
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show '-', file1[count1, dc1].inspect
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end
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if dc2 > 0
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show '+', file2[count2, dc2].inspect
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end
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count1 += dc1
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count2 += dc2
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show ' ', file1[count1, ctxlen].inspect
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puts
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throw :resynced
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}
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}
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raise 'nomatch..'
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}
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end
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end
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