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=begin
$Id: jmax_format.rb,v 1.2 2006-03-15 04:40:47 matju Exp $
GridFlow
Copyright (c) 2001,2002,2003 by Mathieu Bouchard
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
See file ../COPYING for further informations on licensing terms.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
=end
class JMaxFileHandler
Size = [4,1,2,4]
Packer = ["N","c","n","N"]
OpTable = [
[0, :return],
[1, :push, :int],
[2, :push, :float],
[3, :push, :symbol],
[5, :set, :int],
[6, :set, :float],
[7, :set, :symbol],
[9, :pop_args, :int],
[10, :push_obj, :int],
[11, :mv_obj, :int],
[12, :pop_objs, :int],
[13, :make_obj, :int],
[14, :put_prop, :symbol],
[16, :obj_mess, :int, :symbol, :int],
[18, :push_obj_table, :int],
[19, :pop_obj_table],
[20, :connect],
[21, :make_top_obj, :int],
]
OpTableById = {}
OpTableByName = {}
OpTable.each {|entry|
id,name,arg = entry
OpTableById[id] = entry
OpTableByName[name] = entry
}
end
class JObject
attr_reader :properties
attr_accessor :parent_patcher
attr_reader :init_messages
attr_reader :connections
def self.[](*args) new(*args) end
def initialize(*args)
@args = args
@properties = {}
@init_messages = []
end
def send_in(inlet,*args)
@init_messages << [inlet,*args]
end
def connect(inlet,target,outlet)
end
def subobjects
@subobjects={} if not defined? @subobjects
@subobjects
end
end
class JMaxFileReader < JMaxFileHandler
def initialize(f,factory=JObject)
@f = f
@symbols = []
@estack = []
@ostack = []
@tstack = []
@factory = factory
end
def parse
magic, code_size, n_symbols = @f.read(12).unpack("a4NN")
case magic
when "bMax"; #ok
when "bMa2"; raise "bMa2 format (jMax 4) is not supported yet"
else raise "not a jMax file"
end
@code = @f.read code_size
@symbols = @f.read.split(/\0/).map {|x| x.intern }
@index = 0
while @index < @code.size
read_opcode
end
raise "@estack.size!=0" if @estack.size!=0
raise "@ostack.size!=1" if @ostack.size!=1
raise "@tstack.size!=0" if @tstack.size!=0
@ostack[0]
end
def read_opcode
#puts "#{@index} of #{@code.size}"
op = @code[@index]; @index+=1
op1,op2 = op&0x3f,op>>6
entry = OpTableById[op1]
if not entry
puts "skipping unknown opcode #{op1},#{op2}"
return
end
args = []
(entry.length-2).times {|i|
args << (case entry[2+i]
when :int
n=Size[op2]; v=@code[@index,n].unpack(Packer[op2])[0]
x = if v[8*n-1]!=0 then ~(~v&((1<<(8*n-1))-1)) else v end
#STDERR.puts "WARNING: #{v} -> #{x}" if x<0
x
when :float
n=4; @code[@index,4].unpack("g")[0]
when :symbol
n=Size[op2]; @symbols[@code[@index,n].unpack(Packer[op2])[0]]
when nil
end)
@index+=n
}
#text = sprintf "%05d: %2d,%1d: %s", @index, op1, op2, entry[1]
#text << "(" << args.map{|x|x.inspect}.join(",") << ")"
#puts text
send entry[1], *args
end
def push x; @estack << x end
def set x
if @estack.size>0 then @estack[-1]=x else @estack << x end
end
def put_prop x; @ostack[-1].properties[x] = @estack[-1] end
def make_obj x
patcher = @ostack[-1] if @ostack.size>0
baby = @factory[*(@estack[-x,x].reverse)]
@ostack << baby
@ostack[-1].parent_patcher = patcher
patcher.subobjects[baby]=true if patcher
end
alias :make_top_obj :make_obj
def pop_args x; @estack[-x,x]=[] end
def push_obj_table x; @tstack<<[] end
def mv_obj x; @tstack[-1][x]=@ostack[-1] end
def pop_objs x; @ostack[-x,x]=[] end
def obj_mess i,s,n
o = @ostack[-1]
m = @estack[-n,n].reverse
if i<0 then o.send s,*m else o.send_in i,s,*m end
end
def push_obj x; @ostack<<@tstack[-1][x] end
def connect; @ostack[-1].connect @estack[-1],@ostack[-2],@estack[-2] end
def pop_obj_table; @tstack.pop end
def return; end
end
if $0 == __FILE__
jff = JMaxFileReader.new File.open("samples/fire.jmax")
jff.parse
end
|
