ObjectiveC/Replace.mm

   1 /* Cycript - Remote Execution Server and Disassembler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include "Replace.hpp"
  41 #include "ObjectiveC/Syntax.hpp"
  42
  43 #include <objc/runtime.h>
  44 #include <sstream>
  45
  46 CYStatement *CYCategory::Replace(CYContext &context) {
  47     CYVariable *cyc($V("$cyc")), *cys($V("$cys"));
  48
  49     return $E($C1($F(NULL, $P5("$cys", "$cyp", "$cyc", "$cyn", "$cyt"), $$->*
  50         $E($ CYAssign($V("$cyp"), $C1($V("object_getClass"), cys)))->*
  51         $E($ CYAssign(cyc, cys))->*
  52         messages_->Replace(context, true)
  53     ), name_->ClassName(context, true)));
  54 }
  55
  56 CYExpression *CYClass::Replace_(CYContext &context) {
  57     CYVariable *cyc($V("$cyc")), *cys($V("$cys"));
  58
  59     CYExpression *name(name_ != NULL ? name_->ClassName(context, false) : $C1($V("$cyq"), $S("CY$")));
  60
  61     return $C1($F(NULL, $P6("$cys", "$cyp", "$cyc", "$cyn", "$cyt", "$cym"), $$->*
  62         $E($ CYAssign($V("$cyp"), $C1($V("object_getClass"), cys)))->*
  63         $E($ CYAssign(cyc, $C3($V("objc_allocateClassPair"), cys, name, $D(0))))->*
  64         $E($ CYAssign($V("$cym"), $C1($V("object_getClass"), cyc)))->*
  65         fields_->Replace(context)->*
  66         messages_->Replace(context, false)->*
  67         $E($C1($V("objc_registerClassPair"), cyc))->*
  68         $ CYReturn(cyc)
  69     ), super_ == NULL ? $ CYNull() : super_);
  70 }
  71
  72 CYExpression *CYClassExpression::Replace(CYContext &context) {
  73     return Replace_(context);
  74 }
  75
  76 CYStatement *CYClassStatement::Replace(CYContext &context) {
  77     return $E(Replace_(context));
  78 }
  79
  80 CYStatement *CYField::Replace(CYContext &context) const {
  81     return NULL;
  82 }
  83
  84 CYStatement *CYMessage::Replace(CYContext &context, bool replace) const { $T(NULL)
  85     CYVariable *cyn($V("$cyn"));
  86     CYVariable *cyt($V("$cyt"));
  87     CYVariable *self($V("self"));
  88     CYVariable *_class($V(instance_ ? "$cys" : "$cyp"));
  89
  90     return $ CYBlock($$->*
  91         next_->Replace(context, replace)->*
  92         $E($ CYAssign(cyn, parameters_->Selector(context)))->*
  93         $E($ CYAssign(cyt, $C1($M(cyn, $S("type")), _class)))->*
  94         $E($C4($V(replace ? "class_replaceMethod" : "class_addMethod"),
  95             $V(instance_ ? "$cyc" : "$cym"),
  96             cyn,
  97             $N2($V("Functor"), $F(NULL, $P2("self", "_cmd", parameters_->Parameters(context)), $$->*
  98                 $ CYVar($ CYDeclarations($ CYDeclaration($I("$cyr"), $N2($V("Super"), self, _class))))->*
  99                 $ CYReturn($C1($M($F(NULL, NULL, code_), $S("call")), self))
 100             ), cyt),
 101             cyt
 102         ))
 103     );
 104 }
 105
 106 CYFunctionParameter *CYMessageParameter::Parameters(CYContext &context) const { $T(NULL)
 107     CYFunctionParameter *next(next_->Parameters(context));
 108     return name_ == NULL ? next : $ CYFunctionParameter(name_, next);
 109 }
 110
 111 CYSelector *CYMessageParameter::Selector(CYContext &context) const {
 112     return $ CYSelector(SelectorPart(context));
 113 }
 114
 115 CYSelectorPart *CYMessageParameter::SelectorPart(CYContext &context) const { $T(NULL)
 116     CYSelectorPart *next(next_->SelectorPart(context));
 117     return tag_ == NULL ? next : $ CYSelectorPart(tag_, name_ != NULL, next);
 118 }
 119
 120 CYExpression *CYSelector::Replace(CYContext &context) {
 121     return $N1($V("Selector"), name_->Replace(context));
 122 }
 123
 124 CYString *CYSelectorPart::Replace(CYContext &context) {
 125     std::ostringstream str;
 126     for (const CYSelectorPart *part(this); part != NULL; part = part->next_) {
 127         if (part->name_ != NULL)
 128             str << part->name_->Value();
 129         if (part->value_)
 130             str << ':';
 131     }
 132     return $S(apr_pstrdup(context.pool_, str.str().c_str()));
 133 }
 134
 135 CYExpression *CYSendDirect::Replace(CYContext &context) {
 136     std::ostringstream name;
 137     CYArgument **argument(&arguments_);
 138
 139     while (*argument != NULL) {
 140         if ((*argument)->name_ != NULL) {
 141             name << *(*argument)->name_;
 142             (*argument)->name_ = NULL;
 143             if ((*argument)->value_ != NULL)
 144                 name << ':';
 145         }
 146
 147         if ((*argument)->value_ == NULL)
 148             *argument = (*argument)->next_;
 149         else
 150             argument = &(*argument)->next_;
 151     }
 152
 153     SEL sel(sel_registerName(name.str().c_str()));
 154     double address(static_cast<double>(reinterpret_cast<uintptr_t>(sel)));
 155
 156     return $C2($V("objc_msgSend"), self_, $D(address), arguments_);
 157 }
 158
 159 CYExpression *CYSendSuper::Replace(CYContext &context) {
 160     return $ CYSendDirect($V("$cyr"), arguments_);
 161 }