libffi/src/types.c

   1 /* -----------------------------------------------------------------------
   2    types.c - Copyright (c) 1996, 1998  Red Hat, Inc.
   3
   4    Predefined ffi_types needed by libffi.
   5
   6    Permission is hereby granted, free of charge, to any person obtaining
   7    a copy of this software and associated documentation files (the
   8    ``Software''), to deal in the Software without restriction, including
   9    without limitation the rights to use, copy, modify, merge, publish,
  10    distribute, sublicense, and/or sell copies of the Software, and to
  11    permit persons to whom the Software is furnished to do so, subject to
  12    the following conditions:
  13
  14    The above copyright notice and this permission notice shall be included
  15    in all copies or substantial portions of the Software.
  16
  17    THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
  18    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20    NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24    DEALINGS IN THE SOFTWARE.
  25    ----------------------------------------------------------------------- */
  26
  27 /* Hide the basic type definitions from the header file, so that we
  28    can redefine them here as "const".  */
  29 #define LIBFFI_HIDE_BASIC_TYPES
  30
  31 #include <ffi.h>
  32 #include <ffi_common.h>
  33
  34 /* Type definitions */
  35
  36 #define FFI_TYPEDEF(name, type, id, maybe_const)\
  37 struct struct_align_##name {                    \
  38   char c;                                       \
  39   type x;                                       \
  40 };                                              \
  41 FFI_EXTERN                                      \
  42 maybe_const ffi_type ffi_type_##name = {        \
  43   sizeof(type),                                 \
  44   offsetof(struct struct_align_##name, x),      \
  45   id, NULL                                      \
  46 }
  47
  48 #define FFI_COMPLEX_TYPEDEF(name, type, maybe_const)    \
  49 static ffi_type *ffi_elements_complex_##name [2] = {    \
  50         (ffi_type *)(&ffi_type_##name), NULL            \
  51 };                                                      \
  52 struct struct_align_complex_##name {                    \
  53   char c;                                               \
  54   _Complex type x;                                      \
  55 };                                                      \
  56 FFI_EXTERN                                              \
  57 maybe_const ffi_type ffi_type_complex_##name = {        \
  58   sizeof(_Complex type),                                \
  59   offsetof(struct struct_align_complex_##name, x),      \
  60   FFI_TYPE_COMPLEX,                                     \
  61   (ffi_type **)ffi_elements_complex_##name              \
  62 }
  63
  64 /* Size and alignment are fake here. They must not be 0. */
  65 FFI_EXTERN const ffi_type ffi_type_void = {
  66   1, 1, FFI_TYPE_VOID, NULL
  67 };
  68
  69 FFI_TYPEDEF(uint8, UINT8, FFI_TYPE_UINT8, const);
  70 FFI_TYPEDEF(sint8, SINT8, FFI_TYPE_SINT8, const);
  71 FFI_TYPEDEF(uint16, UINT16, FFI_TYPE_UINT16, const);
  72 FFI_TYPEDEF(sint16, SINT16, FFI_TYPE_SINT16, const);
  73 FFI_TYPEDEF(uint32, UINT32, FFI_TYPE_UINT32, const);
  74 FFI_TYPEDEF(sint32, SINT32, FFI_TYPE_SINT32, const);
  75 FFI_TYPEDEF(uint64, UINT64, FFI_TYPE_UINT64, const);
  76 FFI_TYPEDEF(sint64, SINT64, FFI_TYPE_SINT64, const);
  77
  78 FFI_TYPEDEF(pointer, void*, FFI_TYPE_POINTER, const);
  79
  80 FFI_TYPEDEF(float, float, FFI_TYPE_FLOAT, const);
  81 FFI_TYPEDEF(double, double, FFI_TYPE_DOUBLE, const);
  82
  83 #if !defined HAVE_LONG_DOUBLE_VARIANT || defined __alpha__
  84 #define FFI_LDBL_CONST const
  85 #else
  86 #define FFI_LDBL_CONST
  87 #endif
  88
  89 #ifdef __alpha__
  90 /* Even if we're not configured to default to 128-bit long double,
  91    maintain binary compatibility, as -mlong-double-128 can be used
  92    at any time.  */
  93 /* Validate the hard-coded number below.  */
  94 # if defined(__LONG_DOUBLE_128__) && FFI_TYPE_LONGDOUBLE != 4
  95 #  error FFI_TYPE_LONGDOUBLE out of date
  96 # endif
  97 const ffi_type ffi_type_longdouble = { 16, 16, 4, NULL };
  98 #elif FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
  99 FFI_TYPEDEF(longdouble, long double, FFI_TYPE_LONGDOUBLE, FFI_LDBL_CONST);
 100 #endif
 101
 102 #ifdef FFI_TARGET_HAS_COMPLEX_TYPE
 103 FFI_COMPLEX_TYPEDEF(float, float, const);
 104 FFI_COMPLEX_TYPEDEF(double, double, const);
 105 #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
 106 FFI_COMPLEX_TYPEDEF(longdouble, long double, FFI_LDBL_CONST);
 107 #endif
 108 #endif