X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/ab2aa221129d1936a866b25679e18445b6c20a77..fb726fc55e2a79b03564be97d5057e28805d84f0:/Replace.cpp?ds=inline

diff --git a/Replace.cpp b/Replace.cpp
index 2115772..e6b761f 100644
--- a/Replace.cpp
+++ b/Replace.cpp
@@ -1,40 +1,22 @@
-/* Cycript - Inlining/Optimizing JavaScript Compiler
- * Copyright (C) 2009  Jay Freeman (saurik)
+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2010  Jay Freeman (saurik)
 */
 
-/* Modified BSD License {{{ */
+/* GNU Lesser General Public License, Version 3 {{{ */
 /*
- *        Redistribution and use in source and binary
- * forms, with or without modification, are permitted
- * provided that the following conditions are met:
+ * Cycript is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
  *
- * 1. Redistributions of source code must retain the
- *    above copyright notice, this list of conditions
- *    and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the
- *    above copyright notice, this list of conditions
- *    and the following disclaimer in the documentation
- *    and/or other materials provided with the
- *    distribution.
- * 3. The name of the author may not be used to endorse
- *    or promote products derived from this software
- *    without specific prior written permission.
+ * Cycript is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
  *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
+**/
 /* }}} */
 
 #include "Parser.hpp"
@@ -104,7 +86,7 @@ CYExpression *CYAssignment::Replace(CYContext &context) {
 }
 
 CYStatement *CYBlock::Replace(CYContext &context) {
-    statements_ = statements_->ReplaceAll(context);
+    context.ReplaceAll(statements_);
     if (statements_ == NULL)
         return $ CYEmpty();
     return this;
@@ -132,14 +114,20 @@ namespace cy {
 namespace Syntax {
 
 void Catch::Replace(CYContext &context) { $T()
+    CYScope scope(CYScopeCatch, context, code_.statements_);
+
+    context.Replace(name_);
+    context.scope_->Declare(context, name_, CYIdentifierCatch);
+
     code_.Replace(context);
+    scope.Close();
 }
 
 } }
 
 void CYClause::Replace(CYContext &context) { $T()
     context.Replace(case_);
-    statements_ = statements_->ReplaceAll(context);
+    context.ReplaceAll(statements_);
     next_->Replace(context);
 }
 
@@ -148,8 +136,8 @@ CYStatement *CYComment::Replace(CYContext &context) {
 }
 
 CYExpression *CYCompound::Replace(CYContext &context) {
-    expressions_ = expressions_->ReplaceAll(context);
-    return expressions_ == NULL ? NULL : this;
+    context.ReplaceAll(expressions_);
+    return this;
 }
 
 CYFunctionParameter *CYComprehension::Parameters(CYContext &context) const { $T(NULL)
@@ -175,23 +163,30 @@ CYExpression *CYCondition::Replace(CYContext &context) {
 void CYContext::NonLocal(CYStatement *&statements) {
     CYContext &context(*this);
 
-    if (nonlocal_->identifier_ != NULL) {
-        CYVariable *cye($V("$cye"));
-        CYVariable *unique($ CYVariable(nonlocal_->identifier_));
+    if (nextlocal_ != NULL && nextlocal_->identifier_ != NULL) {
+        CYIdentifier *cye($I("$cye")->Replace(context));
+        CYIdentifier *unique(nextlocal_->identifier_->Replace(context));
+
+        CYStatement *declare(
+            $ CYVar($L1($L(unique, $ CYObject()))));
+
+        cy::Syntax::Catch *rescue(
+            $ cy::Syntax::Catch(cye, $$->*
+                $ CYIf($ CYIdentical($M($V(cye), $S("$cyk")), $V(unique)), $$->*
+                    $ CYReturn($M($V(cye), $S("$cyv"))))->*
+                $ cy::Syntax::Throw($V(cye))));
+
+        context.Replace(declare);
+        rescue->Replace(context);
 
         statements = $$->*
-            $E($ CYAssign(unique, $ CYObject()))->*
-            $ cy::Syntax::Try(statements, $ cy::Syntax::Catch(cye->name_, $$->*
-                $ CYIf($ CYIdentical($M(cye, $S("$cyk")), unique), $$->*
-                    $ CYReturn($M(cye, $S("$cyv"))))->*
-                $ cy::Syntax::Throw(cye)
-            ), NULL);
+            declare->*
+            $ cy::Syntax::Try(statements, rescue, NULL);
     }
 }
 
 CYIdentifier *CYContext::Unique() {
-    CYContext &context(*this);
-    return $ CYIdentifier(apr_psprintf(pool_, "$cy%u", unique_++));
+    return $ CYIdentifier(apr_psprintf($pool, "$cy%u", unique_++));
 }
 
 CYStatement *CYContinue::Replace(CYContext &context) {
@@ -204,13 +199,13 @@ CYAssignment *CYDeclaration::Assignment(CYContext &context) {
 }
 
 CYExpression *CYDeclaration::ForEachIn(CYContext &context) {
-    return $ CYVariable(identifier_);
+    return $V(identifier_);
 }
 
 CYExpression *CYDeclaration::Replace(CYContext &context) {
     context.Replace(identifier_);
     context.scope_->Declare(context, identifier_, CYIdentifierVariable);
-    return $ CYVariable(identifier_);
+    return $V(identifier_);
 }
 
 CYProperty *CYDeclarations::Property(CYContext &context) { $T(NULL)
@@ -218,15 +213,7 @@ CYProperty *CYDeclarations::Property(CYContext &context) { $T(NULL)
 }
 
 CYCompound *CYDeclarations::Replace(CYContext &context) {
-    CYCompound *compound;
-    if (next_ == NULL) compound:
-        compound = $ CYCompound();
-    else {
-        compound = next_->Replace(context);
-        if (compound == NULL)
-            goto compound;
-    }
-
+    CYCompound *compound(next_ == NULL ? $ CYCompound() : next_->Replace(context));
     if (CYAssignment *assignment = declaration_->Assignment(context))
         compound->AddPrev(assignment);
     return compound;
@@ -288,18 +275,6 @@ CYExpression *CYExpression::ForEachIn(CYContext &context) {
     return this;
 }
 
-CYExpression *CYExpression::ReplaceAll(CYContext &context) { $T(NULL)
-    CYExpression *replace(this);
-    context.Replace(replace);
-
-    if (CYExpression *next = next_->ReplaceAll(context))
-        replace->SetNext(next);
-    else
-        replace->SetNext(next_);
-
-    return replace;
-}
-
 CYNumber *CYFalse::Number(CYContext &context) {
     return $D(0);
 }
@@ -333,15 +308,15 @@ CYFunctionParameter *CYForInComprehension::Parameter(CYContext &context) const {
 }
 
 CYStatement *CYForInComprehension::Replace(CYContext &context, CYStatement *statement) const {
-    return $ CYForIn($ CYVariable(name_), set_, CYComprehension::Replace(context, statement));
+    return $ CYForIn($V(name_), set_, CYComprehension::Replace(context, statement));
 }
 
 CYStatement *CYForEachIn::Replace(CYContext &context) {
-    CYVariable *cys($V("$cys")), *cyt($V("$cyt"));
+    CYIdentifier *cys($I("$cys")), *cyt($I("$cyt"));
 
-    return $ CYLet($L2($L($I("$cys"), set_), $L($I("$cyt"))), $$->*
-        $ CYForIn(cyt, cys, $ CYBlock($$->*
-            $E($ CYAssign(initialiser_->ForEachIn(context), $M(cys, cyt)))->*
+    return $ CYLet($L2($L(cys, set_), $L(cyt)), $$->*
+        $ CYForIn($V(cyt), $V(cys), $ CYBlock($$->*
+            $E($ CYAssign(initialiser_->ForEachIn(context), $M($V(cys), $V(cyt))))->*
             code_
         ))
     );
@@ -352,12 +327,12 @@ CYFunctionParameter *CYForEachInComprehension::Parameter(CYContext &context) con
 }
 
 CYStatement *CYForEachInComprehension::Replace(CYContext &context, CYStatement *statement) const {
-    CYVariable *cys($V("$cys")), *name($ CYVariable(name_));
+    CYIdentifier *cys($I("cys"));
 
     return $E($C0($F(NULL, $P1("$cys"), $$->*
-        $E($ CYAssign(cys, set_))->*
-        $ CYForIn(name, cys, $ CYBlock($$->*
-            $E($ CYAssign(name, $M(cys, name)))->*
+        $E($ CYAssign($V(cys), set_))->*
+        $ CYForIn($V(name_), $V(cys), $ CYBlock($$->*
+            $E($ CYAssign($V(name_), $M($V(cys), $V(name_))))->*
             CYComprehension::Replace(context, statement)
         ))
     )));
@@ -372,34 +347,36 @@ void CYFunction::Replace_(CYContext &context, bool outer) {
     if (outer)
         Inject(context);
 
-    CYScope scope;
-    scope.parent_ = context.scope_;
-    context.scope_ = &scope;
+    CYScope scope(CYScopeFunction, context, code_.statements_);
+
+    CYNonLocal *nonlocal(context.nonlocal_);
+    CYNonLocal *nextlocal(context.nextlocal_);
 
     bool localize;
-    if (nonlocal_ != NULL)
+    if (nonlocal_ != NULL) {
         localize = false;
-    else {
+        context.nonlocal_ = nonlocal_;
+    } else {
         localize = true;
         nonlocal_ = $ CYNonLocal();
+        context.nextlocal_ = nonlocal_;
     }
 
-    CYNonLocal *nonlocal(context.nonlocal_);
-    context.nonlocal_ = nonlocal_;
-
     if (!outer && name_ != NULL)
         Inject(context);
 
     if (parameters_ != NULL)
         parameters_ = parameters_->Replace(context, code_);
+
     code_.Replace(context);
 
     if (localize)
         context.NonLocal(code_.statements_);
+
+    context.nextlocal_ = nextlocal;
     context.nonlocal_ = nonlocal;
 
-    context.scope_ = scope.parent_;
-    scope.Scope(context, code_.statements_);
+    scope.Close();
 }
 
 CYExpression *CYFunctionExpression::Replace(CYContext &context) {
@@ -408,7 +385,7 @@ CYExpression *CYFunctionExpression::Replace(CYContext &context) {
 }
 
 CYFunctionParameter *CYFunctionParameter::Replace(CYContext &context, CYBlock &code) {
-    name_ = name_->Replace(context);
+    context.Replace(name_);
     context.scope_->Declare(context, name_, CYIdentifierArgument);
     if (next_ != NULL)
         next_ = next_->Replace(context, code);
@@ -472,20 +449,22 @@ void CYMember::Replace_(CYContext &context) {
     context.Replace(property_);
 }
 
-CYExpression *CYNew::AddArgument(CYContext &context, CYExpression *value) {
-    CYArgument **argument(&arguments_);
-    while (*argument != NULL)
-        argument = &(*argument)->next_;
-    *argument = $ CYArgument(value);
+namespace cy {
+namespace Syntax {
+
+CYExpression *New::AddArgument(CYContext &context, CYExpression *value) {
+    CYSetLast(arguments_, $ CYArgument(value));
     return this;
 }
 
-CYExpression *CYNew::Replace(CYContext &context) {
+CYExpression *New::Replace(CYContext &context) {
     context.Replace(constructor_);
     arguments_->Replace(context);
     return this;
 }
 
+} }
+
 CYNumber *CYNull::Number(CYContext &context) {
     return $D(0);
 }
@@ -500,7 +479,7 @@ CYNumber *CYNumber::Number(CYContext &context) {
 
 CYString *CYNumber::String(CYContext &context) {
     // XXX: there is a precise algorithm for this
-    return $S(apr_psprintf(context.pool_, "%.17g", Value()));
+    return $S(apr_psprintf($pool, "%.17g", Value()));
 }
 
 CYExpression *CYObject::Replace(CYContext &context) {
@@ -511,8 +490,9 @@ CYExpression *CYObject::Replace(CYContext &context) {
 CYFunctionParameter *CYOptionalFunctionParameter::Replace(CYContext &context, CYBlock &code) {
     CYFunctionParameter *parameter($ CYFunctionParameter(name_, next_));
     parameter = parameter->Replace(context, code);
+    context.Replace(initializer_);
 
-    CYVariable *name($ CYVariable(name_));
+    CYVariable *name($V(name_));
     code.AddPrev($ CYIf($ CYIdentical($ CYTypeOf(name), $S("undefined")), $$->*
         $E($ CYAssign(name, initializer_))
     ));
@@ -549,16 +529,13 @@ namespace {
 }
 
 void CYProgram::Replace(CYContext &context) {
-    CYScope scope;
-    scope.parent_ = context.scope_;
-    context.scope_ = &scope;
+    CYScope scope(CYScopeProgram, context, statements_);
 
-    context.nonlocal_ = $ CYNonLocal();
-    statements_ = statements_->ReplaceAll(context);
+    context.nextlocal_ = $ CYNonLocal();
+    context.ReplaceAll(statements_);
     context.NonLocal(statements_);
 
-    context.scope_ = scope.parent_;
-    scope.Scope(context, statements_);
+    scope.Close();
 
     size_t offset(0);
 
@@ -569,8 +546,8 @@ void CYProgram::Replace(CYContext &context) {
     IdentifierUsages usages;
 
     if (offset < context.rename_.size())
-        for (CYIdentifier *i(context.rename_[offset].identifier_); i != NULL; i = i->next_)
-             usages.insert(i);
+        CYForEach (i, context.rename_[offset].identifier_)
+            usages.insert(i);
 
     // XXX: totalling the probable occurrences and sorting by them would improve the result
     for (CYIdentifierUsageVector::const_iterator i(context.rename_.begin()); i != context.rename_.end(); ++i, ++offset) {
@@ -579,7 +556,7 @@ void CYProgram::Replace(CYContext &context) {
         const char *name;
 
         if (context.options_.verbose_)
-            name = apr_psprintf(context.pool_, "$%"APR_SIZE_T_FMT"", offset);
+            name = apr_psprintf($pool, "$%"APR_SIZE_T_FMT"", offset);
         else {
             char id[8];
             id[7] = '\0';
@@ -598,11 +575,11 @@ void CYProgram::Replace(CYContext &context) {
                 goto id;
             }
 
-            name = apr_pstrmemdup(context.pool_, id + position, 7 - position);
+            name = apr_pstrmemdup($pool, id + position, 7 - position);
             // XXX: at some point, this could become a keyword
         }
 
-        for (CYIdentifier *identifier(i->identifier_); identifier != NULL; identifier = identifier->next_)
+        CYForEach (identifier, i->identifier_)
             identifier->Set(name);
     }
 }
@@ -616,7 +593,7 @@ CYStatement *CYReturn::Replace(CYContext &context) {
     if (context.nonlocal_ != NULL) {
         CYProperty *value(value_ == NULL ? NULL : $ CYProperty($S("$cyv"), value_));
         return $ cy::Syntax::Throw($ CYObject(
-            $ CYProperty($S("$cyk"), $ CYVariable(context.nonlocal_->Target(context)), value)
+            $ CYProperty($S("$cyk"), $V(context.nonlocal_->Target(context)), value)
         ));
     }
 
@@ -631,12 +608,32 @@ CYExpression *CYRubyBlock::Replace(CYContext &context) {
 
 CYExpression *CYRubyProc::Replace(CYContext &context) {
     CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
-    function->nonlocal_ = context.nonlocal_;
+    function->nonlocal_ = context.nextlocal_;
     return function;
 }
 
+CYScope::CYScope(CYScopeType type, CYContext &context, CYStatement *&statements) :
+    type_(type),
+    context_(context),
+    statements_(statements),
+    parent_(context.scope_)
+{
+    context_.scope_ = this;
+}
+
+CYScope::~CYScope() {
+}
+
+void CYScope::Close() {
+    context_.scope_ = parent_;
+    Scope(context_, statements_);
+}
+
 void CYScope::Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierFlags flags) {
-    internal_.insert(CYIdentifierAddressFlagsMap::value_type(identifier, flags));
+    if (type_ == CYScopeCatch && flags != CYIdentifierCatch)
+        parent_->Declare(context, identifier, flags);
+    else
+        internal_.insert(CYIdentifierAddressFlagsMap::value_type(identifier, flags));
 }
 
 CYIdentifier *CYScope::Lookup(CYContext &context, CYIdentifier *identifier) {
@@ -741,16 +738,9 @@ CYStatement *CYStatement::Collapse(CYContext &context) {
     return this;
 }
 
-CYStatement *CYStatement::ReplaceAll(CYContext &context) { $T(NULL)
-    CYStatement *replace(this);
-    context.Replace(replace);
-    replace->SetNext(next_->ReplaceAll(context));
-    return replace->Collapse(context);
-}
-
 CYString *CYString::Concat(CYContext &context, CYString *rhs) const {
     size_t size(size_ + rhs->size_);
-    char *value(new(context.pool_) char[size + 1]);
+    char *value($ char[size + 1]);
     memcpy(value, value_, size_);
     memcpy(value + size_, rhs->value_, rhs->size_);
     value[size] = '\0';
@@ -815,7 +805,7 @@ CYStatement *CYVar::Replace(CYContext &context) {
 }
 
 CYExpression *CYVariable::Replace(CYContext &context) {
-    name_ = name_->Replace(context);
+    context.Replace(name_);
     return this;
 }