sig/ffi_type.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2012  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Error.hpp"
  23
  24 #include "sig/ffi_type.hpp"
  25 #include "sig/types.hpp"
  26
  27 #define ffi_type_slonglong ffi_type_sint64
  28 #define ffi_type_ulonglong ffi_type_uint64
  29
  30 namespace sig {
  31
  32 void sig_ffi_types(
  33     apr_pool_t *pool,
  34     ffi_type *(*sig_ffi_type)(apr_pool_t *, struct Type *),
  35     struct Signature *signature,
  36     ffi_type **types,
  37     size_t skip = 0,
  38     size_t offset = 0
  39 ) {
  40     _assert(signature->count >= skip);
  41     for (size_t index = skip; index != signature->count; ++index)
  42         types[index - skip + offset] = (*sig_ffi_type)(pool, signature->elements[index].type);
  43 }
  44
  45 ffi_type *ObjectiveC(apr_pool_t *pool, struct Type *type) {
  46     switch (type->primitive) {
  47         case typename_P: return &ffi_type_pointer;
  48
  49         case union_P:
  50             /* XXX: we can totally make this work */
  51             _assert(false);
  52         break;
  53
  54         case string_P: return &ffi_type_pointer;
  55         case selector_P: return &ffi_type_pointer;
  56         case block_P: return &ffi_type_pointer;
  57         case object_P: return &ffi_type_pointer;
  58         case boolean_P: return &ffi_type_uchar;
  59         case uchar_P: return &ffi_type_uchar;
  60         case uint_P: return &ffi_type_uint;
  61         case ulong_P: return &ffi_type_ulong;
  62         case ulonglong_P: return &ffi_type_ulonglong;
  63         case ushort_P: return &ffi_type_ushort;
  64
  65         case array_P: {
  66             // XXX: this is really lame
  67             ffi_type *aggregate(reinterpret_cast<ffi_type *>(apr_palloc(pool, sizeof(ffi_type))));
  68             aggregate->size = 0;
  69             aggregate->alignment = 0;
  70             aggregate->type = FFI_TYPE_STRUCT;
  71
  72             ffi_type *element(ObjectiveC(pool, type->data.data.type));
  73             size_t size(type->data.data.size);
  74
  75             aggregate->elements = reinterpret_cast<ffi_type **>(apr_palloc(pool, (size + 1) * sizeof(ffi_type *)));
  76             for (size_t i(0); i != size; ++i)
  77                 aggregate->elements[i] = element;
  78             aggregate->elements[size] = NULL;
  79
  80             return aggregate;
  81         } break;
  82
  83         case pointer_P: return &ffi_type_pointer;
  84
  85         case bit_P:
  86             /* XXX: we can totally make this work */
  87             _assert(false);
  88         break;
  89
  90         case char_P: return &ffi_type_schar;
  91         case double_P: return &ffi_type_double;
  92         case float_P: return &ffi_type_float;
  93         case int_P: return &ffi_type_sint;
  94         case long_P: return &ffi_type_slong;
  95         case longlong_P: return &ffi_type_slonglong;
  96         case short_P: return &ffi_type_sshort;
  97
  98         case void_P: return &ffi_type_void;
  99
 100         case struct_P: {
 101             ffi_type *aggregate(reinterpret_cast<ffi_type *>(apr_palloc(pool, sizeof(ffi_type))));
 102             aggregate->size = 0;
 103             aggregate->alignment = 0;
 104             aggregate->type = FFI_TYPE_STRUCT;
 105
 106             aggregate->elements = reinterpret_cast<ffi_type **>(apr_palloc(pool, (type->data.signature.count + 1) * sizeof(ffi_type *)));
 107             sig_ffi_types(pool, &ObjectiveC, &type->data.signature, aggregate->elements);
 108             aggregate->elements[type->data.signature.count] = NULL;
 109
 110             return aggregate;
 111         } break;
 112
 113         default:
 114             _assert(false);
 115         break;
 116     }
 117 }
 118
 119 ffi_type *Java(apr_pool_t *pool, struct Type *type) {
 120     switch (type->primitive) {
 121         case typename_P: return &ffi_type_pointer;
 122         case union_P: return &ffi_type_pointer;
 123         case string_P: return &ffi_type_pointer;
 124         case selector_P: return &ffi_type_pointer;
 125         case block_P: return &ffi_type_pointer;
 126         case object_P: return &ffi_type_pointer;
 127         case boolean_P: return &ffi_type_uchar;
 128         case uchar_P: return &ffi_type_uchar;
 129         case uint_P: return &ffi_type_uint;
 130         case ulong_P: return &ffi_type_ulong;
 131         case ulonglong_P: return &ffi_type_ulonglong;
 132         case ushort_P: return &ffi_type_ushort;
 133         case array_P: return &ffi_type_pointer;
 134         case pointer_P: return &ffi_type_pointer;
 135
 136         /* XXX: bit type */
 137         case bit_P: return &ffi_type_uint;
 138
 139         case char_P: return &ffi_type_schar;
 140         case double_P: return &ffi_type_double;
 141         case float_P: return &ffi_type_double;
 142         case int_P: return &ffi_type_sint;
 143         case long_P: return &ffi_type_slong;
 144         case longlong_P: return &ffi_type_slonglong;
 145         case short_P: return &ffi_type_sshort;
 146         case void_P: return &ffi_type_void;
 147         case struct_P: return &ffi_type_pointer;
 148
 149         default:
 150             _assert(false);
 151         break;
 152     }
 153 }
 154
 155 void sig_ffi_cif(
 156     apr_pool_t *pool,
 157     ffi_type *(*sig_ffi_type)(apr_pool_t *, struct Type *),
 158     struct Signature *signature,
 159     ffi_cif *cif,
 160     size_t skip,
 161     ffi_type **types,
 162     size_t offset
 163 ) {
 164     if (types == NULL)
 165         types = reinterpret_cast<ffi_type **>(apr_palloc(pool, (signature->count - 1) * sizeof(ffi_type *)));
 166     ffi_type *type = (*sig_ffi_type)(pool, signature->elements[0].type);
 167     sig_ffi_types(pool, sig_ffi_type, signature, types, 1 + skip, offset);
 168     ffi_status status = ffi_prep_cif(cif, FFI_DEFAULT_ABI, signature->count - 1 - skip + offset, type, types);
 169     _assert(status == FFI_OK);
 170 }
 171
 172 }