147 lines
2.9 KiB
Ruby
147 lines
2.9 KiB
Ruby
#!/usr/bin/env ruby -w
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def dump_rules(rules)
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# create another hash for the hash code.
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index = []
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rules.each {|key, value|
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# 1.8 doesn't have getbyte()
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# string[] returns a byte in 1.8, string in 1.9
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byte = key.bytes.next()
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byte |= 0x20
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byte ^= key.length
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byte &= 0x0f
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index[byte] ||= []
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index[byte].push(key)
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}
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indent6 = " "
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index.each_index {|ix|
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array = index[ix]
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next unless array
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printf(" case 0x%02x:\n", ix)
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array.each{|key|
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offset = 0
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printf(" // %s\n", key)
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printf(" if (size == %d\n", key.length)
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key.scan(/..?/) {|xx|
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tmp = xx.unpack("C*")
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tmp = tmp.map {|xxx| xxx | 0x20 }
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if tmp.length == 2
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tmp = (tmp[0]) + (tmp[1] << 8 )
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printf(" && (wp[%d] | 0x2020) == 0x%04x // '%s'\n",
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offset, tmp, xx
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)
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offset += 1
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else
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tmp = tmp[0]
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printf(" && (cp[%d] | 0x20) == 0x%02x // '%s'\n",
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offset * 2, tmp, xx
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)
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end
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} # scan
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puts(" ) {")
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rules[key].each {|x|
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puts(indent6 + x)
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}
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puts(" }")
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}
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printf(" break;\n\n")
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}
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end
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ARGV.each {|filename|
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state = 0
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substate = 0
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header = []
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trailer = []
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tmp = []
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rule = nil
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rules = {}
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IO.foreach(filename) {|line|
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#line.chomp!
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line.sub!(/\s*$/, ''); #trim trailing space
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#next if line == ''
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if line == '%%'
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state = state + 1
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raise "Too many sections" if state > 3
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next
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end
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case state
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when 0
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raise "invalid section" unless line == ''
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next
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when 1
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header.push(line)
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next
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when 2
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trailer.push(line)
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next
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end
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# state 3
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if !rule
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next if line == ''
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if line =~ /^'([a-zA-Z0-9.+_\/-]+)'\s*->$/
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rule = $1;
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raise "duplicate rule: #{rule}" if rules[rule]
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next
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else
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raise "oops #{line}"
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end
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end
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if line == '.'
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rules[rule] = tmp
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tmp = []
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rule = nil
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else
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tmp.push(line)
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end
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}
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if state != 3 || rule
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raise "unexpected EOF"
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end
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header.each {|x| puts x }
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dump_rules(rules)
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trailer.each{|x| puts x }
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}
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