Decode.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include <sstream>
  23
  24 #include "Decode.hpp"
  25 #include "Replace.hpp"
  26
  27 CYTypedIdentifier *Decode_(CYPool &pool, struct sig::Type *type) {
  28     switch (type->primitive) {
  29         case sig::unknown_P: return $ CYTypedIdentifier($ CYTypeError());
  30
  31         case sig::function_P: {
  32             _assert(type->data.signature.count != 0);
  33             CYTypedParameter *parameter(NULL);
  34             for (size_t i(type->data.signature.count - 1); i != 0; --i)
  35                 parameter = $ CYTypedParameter(Decode(pool, type->data.signature.elements[i].type), parameter);
  36             return Decode(pool, type->data.signature.elements[0].type)->Modify($ CYTypeFunctionWith(parameter));
  37         } break;
  38
  39         case sig::typename_P: return $ CYTypedIdentifier($ CYTypeVariable("Class"));
  40         case sig::union_P: _assert(false); break;
  41         case sig::string_P: return $ CYTypedIdentifier($ CYTypeVariable("char"), $ CYTypePointerTo());
  42         case sig::selector_P: return $ CYTypedIdentifier($ CYTypeVariable("SEL"));
  43
  44         case sig::block_P: {
  45             if (type->data.signature.count == 0)
  46                 return $ CYTypedIdentifier($ CYTypeVariable("NSBlock"), $ CYTypePointerTo());
  47             else {
  48                 CYTypedParameter *parameter(NULL);
  49                 for (size_t i(type->data.signature.count - 1); i != 0; --i)
  50                     parameter = $ CYTypedParameter(Decode(pool, type->data.signature.elements[i].type), parameter);
  51                 return Decode(pool, type->data.signature.elements[0].type)->Modify($ CYTypeBlockWith(parameter));
  52             }
  53         } break;
  54
  55         case sig::object_P: {
  56             if (type->name == NULL)
  57                 return $ CYTypedIdentifier($ CYTypeVariable("id"));
  58             else
  59                 return $ CYTypedIdentifier($ CYTypeVariable(type->name), $ CYTypePointerTo());
  60         } break;
  61
  62         case sig::boolean_P: return $ CYTypedIdentifier($ CYTypeVariable("bool"));
  63         case sig::uchar_P: return $ CYTypedIdentifier($ CYTypeUnsigned($ CYTypeVariable("char")));
  64         case sig::uint_P: return $ CYTypedIdentifier($ CYTypeUnsigned($ CYTypeVariable("int")));
  65         case sig::ulong_P: return $ CYTypedIdentifier($ CYTypeUnsigned($ CYTypeLong($ CYTypeVariable("int"))));
  66         case sig::ulonglong_P: return $ CYTypedIdentifier($ CYTypeUnsigned($ CYTypeLong($ CYTypeLong($ CYTypeVariable("int")))));
  67         case sig::ushort_P: return $ CYTypedIdentifier($ CYTypeUnsigned($ CYTypeShort($ CYTypeVariable("int"))));
  68         case sig::array_P: return Decode(pool, type->data.data.type)->Modify($ CYTypeArrayOf($D(type->data.data.size)));
  69
  70         case sig::pointer_P: {
  71             CYTypedIdentifier *typed;
  72             if (type->data.data.type == NULL)
  73                 typed = $ CYTypedIdentifier($ CYTypeVoid());
  74             else
  75                 typed = Decode(pool, type->data.data.type);
  76             return typed->Modify($ CYTypePointerTo());
  77         } break;
  78
  79         case sig::bit_P: _assert(false); break;
  80         case sig::char_P: return $ CYTypedIdentifier($ CYTypeVariable("char"));
  81         case sig::double_P: return $ CYTypedIdentifier($ CYTypeVariable("double"));
  82         case sig::float_P: return $ CYTypedIdentifier($ CYTypeVariable("float"));
  83         case sig::int_P: return $ CYTypedIdentifier($ CYTypeVariable("int"));
  84         case sig::long_P: return $ CYTypedIdentifier($ CYTypeLong($ CYTypeVariable("int")));
  85         case sig::longlong_P: return $ CYTypedIdentifier($ CYTypeLong($ CYTypeLong($ CYTypeVariable("int"))));
  86         case sig::short_P: return $ CYTypedIdentifier($ CYTypeShort($ CYTypeVariable("int")));
  87
  88         case sig::void_P: return $ CYTypedIdentifier($ CYTypeVoid());
  89
  90         case sig::struct_P: {
  91             CYTypeStructField *fields(NULL);
  92             for (size_t i(type->data.signature.count); i != 0; --i) {
  93                 sig::Element &element(type->data.signature.elements[i - 1]);
  94                 CYTypedIdentifier *typed(Decode(pool, element.type));
  95                 if (element.name != NULL)
  96                     typed->identifier_ = $I(element.name);
  97                 fields = $ CYTypeStructField(typed, fields);
  98             }
  99             CYIdentifier *name(type->name == NULL ? NULL : $I(type->name));
 100             return $ CYTypedIdentifier($ CYTypeStruct(name, $ CYStructTail(fields)));
 101         } break;
 102     }
 103
 104     _assert(false);
 105     return NULL;
 106 }
 107
 108 CYTypedIdentifier *Decode(CYPool &pool, struct sig::Type *type) {
 109     CYTypedIdentifier *typed(Decode_(pool, type));
 110     if ((type->flags & JOC_TYPE_CONST) != 0) {
 111         if (type->primitive == sig::string_P)
 112             typed->modifier_ = $ CYTypeConstant(typed->modifier_);
 113         else
 114             typed = typed->Modify($ CYTypeConstant());
 115     }
 116     return typed;
 117 }