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File Content: `pack.rb`

# frozen_string_literal: true
require 'fiddle'

module Fiddle
  module PackInfo # :nodoc: all
    ALIGN_MAP = {
      TYPE_VOIDP => ALIGN_VOIDP,
      TYPE_CHAR  => ALIGN_CHAR,
      TYPE_SHORT => ALIGN_SHORT,
      TYPE_INT   => ALIGN_INT,
      TYPE_LONG  => ALIGN_LONG,
      TYPE_FLOAT => ALIGN_FLOAT,
      TYPE_DOUBLE => ALIGN_DOUBLE,
      -TYPE_CHAR  => ALIGN_CHAR,
      -TYPE_SHORT => ALIGN_SHORT,
      -TYPE_INT   => ALIGN_INT,
      -TYPE_LONG  => ALIGN_LONG,
    }

    PACK_MAP = {
      TYPE_VOIDP => "l!",
      TYPE_CHAR  => "c",
      TYPE_SHORT => "s!",
      TYPE_INT   => "i!",
      TYPE_LONG  => "l!",
      TYPE_FLOAT => "f",
      TYPE_DOUBLE => "d",
      -TYPE_CHAR  => "c",
      -TYPE_SHORT => "s!",
      -TYPE_INT   => "i!",
      -TYPE_LONG  => "l!",
    }

    SIZE_MAP = {
      TYPE_VOIDP => SIZEOF_VOIDP,
      TYPE_CHAR  => SIZEOF_CHAR,
      TYPE_SHORT => SIZEOF_SHORT,
      TYPE_INT   => SIZEOF_INT,
      TYPE_LONG  => SIZEOF_LONG,
      TYPE_FLOAT => SIZEOF_FLOAT,
      TYPE_DOUBLE => SIZEOF_DOUBLE,
      -TYPE_CHAR  => SIZEOF_CHAR,
      -TYPE_SHORT => SIZEOF_SHORT,
      -TYPE_INT   => SIZEOF_INT,
      -TYPE_LONG  => SIZEOF_LONG,
    }
    if defined?(TYPE_LONG_LONG)
      ALIGN_MAP[TYPE_LONG_LONG] = ALIGN_MAP[-TYPE_LONG_LONG] = ALIGN_LONG_LONG
      PACK_MAP[TYPE_LONG_LONG] = PACK_MAP[-TYPE_LONG_LONG] = "q"
      SIZE_MAP[TYPE_LONG_LONG] = SIZE_MAP[-TYPE_LONG_LONG] = SIZEOF_LONG_LONG
      PACK_MAP[TYPE_VOIDP] = "q" if SIZEOF_LONG_LONG == SIZEOF_VOIDP
    end

    def align(addr, align)
      d = addr % align
      if( d == 0 )
        addr
      else
        addr + (align - d)
      end
    end
    module_function :align
  end

  class Packer # :nodoc: all
    include PackInfo

    def self.[](*types)
      new(types)
    end

    def initialize(types)
      parse_types(types)
    end

    def size()
      @size
    end

    def pack(ary)
      case SIZEOF_VOIDP
      when SIZEOF_LONG
        ary.pack(@template)
      else
        if defined?(TYPE_LONG_LONG) and
          SIZEOF_VOIDP == SIZEOF_LONG_LONG
          ary.pack(@template)
        else
          raise(RuntimeError, "sizeof(void*)?")
        end
      end
    end

    def unpack(ary)
      case SIZEOF_VOIDP
      when SIZEOF_LONG
        ary.join().unpack(@template)
      else
        if defined?(TYPE_LONG_LONG) and
          SIZEOF_VOIDP == SIZEOF_LONG_LONG
          ary.join().unpack(@template)
        else
          raise(RuntimeError, "sizeof(void*)?")
        end
      end
    end

    private

    def parse_types(types)
      @template = "".dup
      addr     = 0
      types.each{|t|
        orig_addr = addr
        if( t.is_a?(Array) )
          addr = align(orig_addr, ALIGN_MAP[TYPE_VOIDP])
        else
          addr = align(orig_addr, ALIGN_MAP[t])
        end
        d = addr - orig_addr
        if( d > 0 )
          @template << "x#{d}"
        end
        if( t.is_a?(Array) )
          @template << (PACK_MAP[t[0]] * t[1])
          addr += (SIZE_MAP[t[0]] * t[1])
        else
          @template << PACK_MAP[t]
          addr += SIZE_MAP[t]
        end
      }
      addr = align(addr, ALIGN_MAP[TYPE_VOIDP])
      @size = addr
    end
  end
end
Name	Size	Permission
closure.rb	1241 bytes	0644
cparser.rb	6200 bytes	0644
function.rb	323 bytes	0644
import.rb	9025 bytes	0644
pack.rb	3207 bytes	0644
struct.rb	6501 bytes	0644
types.rb	1942 bytes	0644
value.rb	2936 bytes	0644
File Content: pack.rb

File Content: `pack.rb`
