gopher/txtable.rb

147 lines
2.9 KiB
Ruby
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2012-04-16 01:45:07 +00:00
#!/usr/binenv ruby -w
def dump_rules(rules)
# create another hash for the hash code.
index = []
rules.each {|key, value|
# 1.8 doesn't have getbyte()
# string[] returns a byte in 1.8, string in 1.9
byte = key.bytes.next()
byte |= 0x20
byte ^= key.length
byte &= 0x0f
index[byte] ||= []
index[byte].push(key)
}
indent6 = " "
index.each_index {|ix|
array = index[ix]
next unless array
printf(" case 0x%02x:\n", ix)
array.each{|key|
offset = 0
printf(" // %s\n", key)
printf(" if (size == %d\n", key.length)
key.scan(/..?/) {|xx|
tmp = xx.unpack("C*")
tmp = tmp.map {|xxx| xxx | 0x20 }
if tmp.length == 2
tmp = (tmp[0]) + (tmp[1] << 8 )
printf(" && (wp[%d] | 0x2020) == 0x%04x // '%s'\n",
offset, tmp, xx
)
offset += 1
else
tmp = tmp[0]
printf(" && (cp[%d] | 0x20) == 0x%02x // '%s'\n",
offset * 2, tmp, xx
)
end
} # scan
puts(" ) {")
rules[key].each {|x|
puts(indent6 + x)
}
puts(" }")
}
printf(" break;\n\n")
}
end
ARGV.each {|filename|
state = 0
substate = 0
header = []
trailer = []
tmp = []
rule = nil
rules = {}
IO.foreach(filename) {|line|
#line.chomp!
line.sub!(/\s*$/, ''); #trim trailing space
#next if line == ''
if line == '%%'
state = state + 1
raise "Too many sections" if state > 3
next
end
case state
when 0
raise "invalid section" unless line == ''
next
when 1
header.push(line)
next
when 2
trailer.push(line)
next
end
# state 3
if !rule
next if line == ''
if line =~ /^'([a-zA-Z0-9.+_-]+)'\s*->$/
rule = $1;
raise "duplicate rule: #{rule}" if rules[rule]
next
else
raise "oops #{line}"
end
end
if line == '.'
rules[rule] = tmp
tmp = []
rule = nil
else
tmp.push(line)
end
}
if state != 3 || rule
raise "unexpected EOF"
end
header.each {|x| puts x }
dump_rules(rules)
trailer.each{|x| puts x }
}