src/ffi/c.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2012-2013 Alexis Laferrière <alexis.laf@xymus.net>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Handles C inline code
  18 # Wraps all  code in a thin wrapper.
  19 module c
  20
  21 import ffi_base
  22
  23 redef class ExternCode
  24         fun is_c : Bool do return language == null or
  25                 language_lowered == "c" or language_lowered.has_prefix( "c " )
  26
  27         fun is_c_body : Bool do return language == null or
  28                 language_lowered == "c" or language_lowered ==  "c body"
  29
  30         fun is_c_header : Bool do return language_lowered == "c header"
  31
  32         redef fun accept_ffi_visitor( v )
  33         do
  34                 if is_c_header then
  35                         v.compilation_unit.header_custom.add( code )
  36                 else if is_c_body then
  37                         v.compilation_unit.body_custom.add( code )
  38                 end
  39         end
  40 end
  41
  42 redef class MMMethod
  43         redef fun accept_ffi_visitor( v )
  44         do
  45                 if extern_implementation.is_c then
  46                         var fc = new CFunction( impl_csignature )
  47                         fc.decls.add( extern_implementation.location.as_line_pragma )
  48                         fc.exprs.add( extern_implementation.code )
  49                         v.compilation_unit.add_exported_function( fc )
  50                 else
  51                         super
  52                 end
  53         end
  54 end
  55
  56 redef class Location
  57         fun as_line_pragma : String
  58         do
  59                 return "#line {line_start} \"{file.filename}\"\n"
  60         end
  61 end