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#
# Copyright (C) 2008, 2009 Wayne Meissner
# Copyright (C) 2009 Luc Heinrich
# Copyright (c) 2007, 2008 Evan Phoenix
# 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
# TypeDefs = Hash.new
def self.add_typedef(current, add)
if current.kind_of?(FFI::Type)
code = current
else
code = TypeDefs[current]
raise TypeError, "Unable to resolve type '#{current}'" unless code
end
TypeDefs[add] = code
end
def self.find_type(name, type_map = nil)
type_map = TypeDefs if type_map.nil?
code = type_map[name]
code = name if !code && name.kind_of?(FFI::Type)
raise TypeError, "Unable to resolve type '#{name}'" unless code
return code
end
# Converts a char
add_typedef(NativeType::INT8, :char)
# Converts an unsigned char
add_typedef(NativeType::UINT8, :uchar)
# Converts an 8 bit int
add_typedef(NativeType::INT8, :int8)
# Converts an unsigned char
add_typedef(NativeType::UINT8, :uint8)
# Converts a short
add_typedef(NativeType::INT16, :short)
# Converts an unsigned short
add_typedef(NativeType::UINT16, :ushort)
# Converts a 16bit int
add_typedef(NativeType::INT16, :int16)
# Converts an unsigned 16 bit int
add_typedef(NativeType::UINT16, :uint16)
# Converts an int
add_typedef(NativeType::INT32, :int)
# Converts an unsigned int
add_typedef(NativeType::UINT32, :uint)
# Converts a 32 bit int
add_typedef(NativeType::INT32, :int32)
# Converts an unsigned 16 bit int
add_typedef(NativeType::UINT32, :uint32)
# Converts a long
add_typedef(NativeType::LONG, :long)
# Converts an unsigned long
add_typedef(NativeType::ULONG, :ulong)
# Converts a 64 bit int
add_typedef(NativeType::INT64, :int64)
# Converts an unsigned 64 bit int
add_typedef(NativeType::UINT64, :uint64)
# Converts a long long
add_typedef(NativeType::INT64, :long_long)
# Converts an unsigned long long
add_typedef(NativeType::UINT64, :ulong_long)
# Converts a float
add_typedef(NativeType::FLOAT32, :float)
# Converts a double
add_typedef(NativeType::FLOAT64, :double)
# Converts a pointer to opaque data
add_typedef(NativeType::POINTER, :pointer)
# For when a function has no return value
add_typedef(NativeType::VOID, :void)
# Converts NUL-terminated C strings
add_typedef(NativeType::STRING, :string)
# Converts FFI::Buffer objects
add_typedef(NativeType::BUFFER_IN, :buffer_in)
add_typedef(NativeType::BUFFER_OUT, :buffer_out)
add_typedef(NativeType::BUFFER_INOUT, :buffer_inout)
add_typedef(NativeType::VARARGS, :varargs)
add_typedef(NativeType::ENUM, :enum)
add_typedef(NativeType::BOOL, :bool)
# Use for a C struct with a char [] embedded inside.
add_typedef(NativeType::CHAR_ARRAY, :char_array)
TypeSizes = {
1 => :char,
2 => :short,
4 => :int,
8 => :long_long,
}
SizeTypes.merge!({
NativeType::INT8 => 1,
NativeType::UINT8 => 1,
NativeType::INT16 => 2,
NativeType::UINT16 => 2,
NativeType::INT32 => 4,
NativeType::UINT32 => 4,
NativeType::INT64 => 8,
NativeType::UINT64 => 8,
NativeType::FLOAT32 => 4,
NativeType::FLOAT64 => 8,
NativeType::LONG => FFI::Platform::LONG_SIZE / 8,
NativeType::ULONG => FFI::Platform::LONG_SIZE / 8,
NativeType::POINTER => FFI::Platform::ADDRESS_SIZE / 8,
})
def self.size_to_type(size)
if sz = TypeSizes[size]
return sz
end
# Be like C, use int as the default type size.
return :int
end
def self.type_size(type)
if sz = SizeTypes[find_type(type)]
return sz
end
raise ArgumentError, "Unknown native type"
end
# Load all the platform dependent types
begin
File.open(File.join(FFI::Platform::CONF_DIR, 'types.conf'), "r") do |f|
prefix = "rbx.platform.typedef."
f.each_line { |line|
if line.index(prefix) == 0
new_type, orig_type = line.chomp.slice(prefix.length..-1).split(/\s*=\s*/)
add_typedef(orig_type.to_sym, new_type.to_sym)
end
}
end
rescue Errno::ENOENT
end
end
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