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#
# Copyright (C) 2009 Luc Heinrich
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of the Evan Phoenix nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
module FFI
class Enums
def initialize
@all_enums = Array.new
@tagged_enums = Hash.new
@symbol_map = Hash.new
end
def <<(enum)
@all_enums << enum
@tagged_enums[enum.tag] = enum unless enum.tag.nil?
@symbol_map.merge!(enum.symbol_map)
end
def find(query)
if @tagged_enums.has_key?(query)
@tagged_enums[query]
else
@all_enums.detect { |enum| enum.symbols.include?(query) }
end
end
def __map_symbol(symbol)
@symbol_map[symbol]
end
end
class Enum
attr_reader :tag
def initialize(info, tag=nil)
@tag = tag
@kv_map = Hash.new
@vk_map = Hash.new
unless info.nil?
last_cst = nil
value = 0
info.each do |i|
case i
when Symbol
@kv_map[i] = value
@vk_map[value] = i
last_cst = i
value += 1
when Integer
@kv_map[last_cst] = i
@vk_map[i] = last_cst
value = i+1
end
end
end
end
def symbols
@kv_map.keys
end
def [](query)
case query
when Symbol
@kv_map[query]
when Integer
@vk_map[query]
end
end
alias find []
def symbol_map
@kv_map
end
alias to_h symbol_map
end
end
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