-/* Cycript - Inlining/Optimizing JavaScript Compiler
- * Copyright (C) 2009 Jay Freeman (saurik)
+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2012 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"
#include <iomanip>
+CYFunctionExpression *CYNonLocalize(CYContext &context, CYFunctionExpression *function) {
+ function->nonlocal_ = context.nextlocal_;
+ return function;
+}
+
CYExpression *CYAdd::Replace(CYContext &context) {
CYInfix::Replace(context);
}
CYExpression *CYAddressOf::Replace(CYContext &context) {
- CYPrefix::Replace(context);
return $C0($M(rhs_, $S("$cya")));
}
-void CYArgument::Replace(CYContext &context) { $T()
+CYArgument *CYArgument::Replace(CYContext &context) { $T(NULL)
context.Replace(value_);
- next_->Replace(context);
+ next_ = next_->Replace(context);
+
+ if (value_ == NULL) {
+ if (next_ == NULL)
+ return NULL;
+ else
+ value_ = $U;
+ }
+
+ return this;
}
CYExpression *CYArray::Replace(CYContext &context) {
CYExpression *CYArrayComprehension::Replace(CYContext &context) {
CYVariable *cyv($V("$cyv"));
- return $C0($F(NULL, $P1("$cyv", comprehensions_->Parameters(context)), $$->*
+ return $C0($F(NULL, $P1($L("$cyv"), comprehensions_->Parameters(context)), $$->*
$E($ CYAssign(cyv, $ CYArray()))->*
comprehensions_->Replace(context, $E($C1($M(cyv, $S("push")), expression_)))->*
$ CYReturn(cyv)
}
CYStatement *CYBlock::Replace(CYContext &context) {
- statements_ = statements_->ReplaceAll(context);
+ context.ReplaceAll(statements_);
if (statements_ == NULL)
return $ CYEmpty();
return this;
namespace Syntax {
void Catch::Replace(CYContext &context) { $T()
+ CYScope scope(true, 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);
}
}
CYExpression *CYCompound::Replace(CYContext &context) {
- expressions_ = expressions_->ReplaceAll(context);
- return expressions_ == NULL ? NULL : this;
+ context.ReplaceAll(expressions_);
+ if (expressions_ == NULL)
+ return NULL;
+ return this;
+}
+
+CYExpression *CYCompound::Primitive(CYContext &context) {
+ CYExpression *expression(expressions_);
+ if (expression == NULL)
+ return NULL;
+ while (expression->next_ != NULL)
+ expression = expression->next_;
+ return expression->Primitive(context);
}
CYFunctionParameter *CYComprehension::Parameters(CYContext &context) const { $T(NULL)
return this;
}
+void CYContext::NonLocal(CYStatement *&statements) {
+ CYContext &context(*this);
+
+ if (nextlocal_ != NULL && nextlocal_->identifier_ != NULL) {
+ CYIdentifier *cye($I("$cye")->Replace(context));
+ CYIdentifier *unique(nextlocal_->identifier_->Replace(context));
+
+ CYStatement *declare(
+ $ CYVar($L1($ CYDeclaration(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 = $$->*
+ declare->*
+ $ cy::Syntax::Try(statements, rescue, NULL);
+ }
+}
+
+CYIdentifier *CYContext::Unique() {
+ return $ CYIdentifier(apr_psprintf($pool, "$cy%u", unique_++));
+}
+
CYStatement *CYContinue::Replace(CYContext &context) {
return this;
}
+CYStatement *CYDebugger::Replace(CYContext &context) {
+ return this;
+}
+
CYAssignment *CYDeclaration::Assignment(CYContext &context) {
- CYExpression *variable(Replace(context));
- return initialiser_ == NULL ? NULL : $ CYAssign(variable, initialiser_);
+ if (initialiser_ == NULL)
+ return NULL;
+
+ CYAssignment *value($ CYAssign(Variable(context), initialiser_));
+ initialiser_ = NULL;
+ return value;
+}
+
+CYVariable *CYDeclaration::Variable(CYContext &context) {
+ return $V(identifier_);
}
-CYExpression *CYDeclaration::ForEachIn(CYContext &context) {
- return $ CYVariable(identifier_);
+CYStatement *CYDeclaration::ForEachIn(CYContext &context, CYExpression *value) {
+ return $ CYVar($L1($ CYDeclaration(identifier_, value)));
}
CYExpression *CYDeclaration::Replace(CYContext &context) {
context.Replace(identifier_);
context.scope_->Declare(context, identifier_, CYIdentifierVariable);
- return $ CYVariable(identifier_);
+ return Variable(context);
+}
+
+void CYDeclarations::Replace(CYContext &context) { $T()
+ declaration_->Replace(context);
+ next_->Replace(context);
}
CYProperty *CYDeclarations::Property(CYContext &context) { $T(NULL)
- return $ CYProperty(declaration_->identifier_, declaration_->initialiser_ ?: $U, next_->Property(context));
+ return $ CYProperty(declaration_->identifier_, declaration_->initialiser_, next_->Property(context));
}
-CYCompound *CYDeclarations::Replace(CYContext &context) {
- CYCompound *compound;
- if (next_ == NULL) compound:
- compound = $ CYCompound();
- else {
- compound = next_->Replace(context);
- if (compound == NULL)
- goto compound;
- }
+CYFunctionParameter *CYDeclarations::Parameter(CYContext &context) { $T(NULL)
+ return $ CYFunctionParameter($ CYDeclaration(declaration_->identifier_), next_->Parameter(context));
+}
+
+CYArgument *CYDeclarations::Argument(CYContext &context) { $T(NULL)
+ return $ CYArgument(declaration_->initialiser_, next_->Argument(context));
+}
+CYCompound *CYDeclarations::Compound(CYContext &context) { $T(NULL)
+ CYCompound *compound(next_->Compound(context) ?: $ CYCompound());
if (CYAssignment *assignment = declaration_->Assignment(context))
compound->AddPrev(assignment);
return compound;
}
CYExpression *CYDirectMember::Replace(CYContext &context) {
- Replace_(context);
+ context.Replace(object_);
+ context.Replace(property_);
return this;
}
next_->Replace(context);
}
-CYStatement *CYEmpty::Collapse(CYContext &context) {
- return next_;
-}
-
CYStatement *CYEmpty::Replace(CYContext &context) {
- return this;
+ return NULL;
}
-CYStatement *CYExpress::Collapse(CYContext &context) {
- if (CYExpress *express = dynamic_cast<CYExpress *>(next_)) {
- CYCompound *next(dynamic_cast<CYCompound *>(express->expression_));
- if (next == NULL)
- next = $ CYCompound(express->expression_);
- next->AddPrev(expression_);
- expression_ = next;
+CYStatement *CYExpress::Replace(CYContext &context) {
+ while (CYExpress *express = dynamic_cast<CYExpress *>(next_)) {
+ CYCompound *compound(dynamic_cast<CYCompound *>(express->expression_));
+ if (compound == NULL)
+ compound = $ CYCompound(express->expression_);
+ compound->AddPrev(expression_);
+ expression_ = compound;
SetNext(express->next_);
}
- return this;
-}
-
-CYStatement *CYExpress::Replace(CYContext &context) {
context.Replace(expression_);
if (expression_ == NULL)
return $ CYEmpty();
+
return this;
}
return this;
}
-CYExpression *CYExpression::ForEachIn(CYContext &context) {
- return this;
+CYStatement *CYExpression::ForEachIn(CYContext &context, CYExpression *value) {
+ return $E($ CYAssign(this, value));
}
-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;
+CYAssignment *CYExpression::Assignment(CYContext &context) {
+ return NULL;
}
CYNumber *CYFalse::Number(CYContext &context) {
return $S("false");
}
+CYExpression *CYFatArrow::Replace(CYContext &context) {
+ CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
+ function->this_.SetNext(context.this_);
+ return function;
+}
+
void CYFinally::Replace(CYContext &context) { $T()
code_.Replace(context);
}
return this;
}
+CYCompound *CYForDeclarations::Replace(CYContext &context) {
+ declarations_->Replace(context);
+ return declarations_->Compound(context);
+}
+
+// XXX: this still feels highly suboptimal
CYStatement *CYForIn::Replace(CYContext &context) {
- // XXX: this actually might need a prefix statement
+ if (CYAssignment *assignment = initialiser_->Assignment(context))
+ return $ CYBlock($$->*
+ $E(assignment)->*
+ this
+ );
+
context.Replace(initialiser_);
context.Replace(set_);
context.Replace(code_);
}
CYFunctionParameter *CYForInComprehension::Parameter(CYContext &context) const {
- return $ CYFunctionParameter(name_);
+ return $ CYFunctionParameter($ CYDeclaration(name_));
}
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"));
+CYStatement *CYForOf::Replace(CYContext &context) {
+ if (CYAssignment *assignment = initialiser_->Assignment(context))
+ return $ CYBlock($$->*
+ $E(assignment)->*
+ this
+ );
+
+ CYIdentifier *cys($I("$cys")), *cyt($I("$cyt"));
- return $ CYLet($L2($L($I("$cys"), set_), $L($I("$cyt"))), $$->*
- $ CYForIn(cyt, cys, $ CYBlock($$->*
- $E($ CYAssign(initialiser_->ForEachIn(context), $M(cys, cyt)))->*
+ return $ CYLetStatement($L2($ CYDeclaration(cys, set_), $ CYDeclaration(cyt)), $$->*
+ $ CYForIn($V(cyt), $V(cys), $ CYBlock($$->*
+ initialiser_->ForEachIn(context, $M($V(cys), $V(cyt)))->*
code_
))
);
}
-CYFunctionParameter *CYForEachInComprehension::Parameter(CYContext &context) const {
- return $ CYFunctionParameter(name_);
+CYFunctionParameter *CYForOfComprehension::Parameter(CYContext &context) const {
+ return $ CYFunctionParameter($ CYDeclaration(name_));
}
-CYStatement *CYForEachInComprehension::Replace(CYContext &context, CYStatement *statement) const {
- CYVariable *cys($V("$cys")), *name($ CYVariable(name_));
+CYStatement *CYForOfComprehension::Replace(CYContext &context, CYStatement *statement) const {
+ CYIdentifier *cys($I("cys"));
- return $E($C0($F(NULL, $P1("$cys"), $$->*
- $E($ CYAssign(cys, set_))->*
- $ CYForIn(name, cys, $ CYBlock($$->*
- $E($ CYAssign(name, $M(cys, name)))->*
+ return $E($C0($F(NULL, $P1($L("$cys")), $$->*
+ $E($ CYAssign($V(cys), set_))->*
+ $ CYForIn($V(name_), $V(cys), $ CYBlock($$->*
+ $E($ CYAssign($V(name_), $M($V(cys), $V(name_))))->*
CYComprehension::Replace(context, statement)
))
)));
if (outer)
Inject(context);
- CYScope scope;
- scope.parent_ = context.scope_;
- context.scope_ = &scope;
+ CYThisScope *_this(context.this_);
+ context.this_ = CYGetLast(&this_);
+
+ CYNonLocal *nonlocal(context.nonlocal_);
+ CYNonLocal *nextlocal(context.nextlocal_);
+
+ bool localize;
+ if (nonlocal_ != NULL) {
+ localize = false;
+ context.nonlocal_ = nonlocal_;
+ } else {
+ localize = true;
+ nonlocal_ = $ CYNonLocal();
+ context.nextlocal_ = nonlocal_;
+ }
+
+ CYScope scope(!localize, context, code_.statements_);
if (!outer && name_ != NULL)
Inject(context);
- if (parameters_ != NULL)
- parameters_ = parameters_->Replace(context, code_);
+ parameters_->Replace(context, code_);
code_.Replace(context);
- context.scope_ = scope.parent_;
- scope.Scope(context, code_.statements_);
+ if (CYIdentifier *identifier = this_.identifier_)
+ code_.statements_ = $$->*
+ $ CYVar($L1($ CYDeclaration(identifier, $ CYThis())))->*
+ code_.statements_;
+
+ if (localize)
+ context.NonLocal(code_.statements_);
+
+ context.nextlocal_ = nextlocal;
+ context.nonlocal_ = nonlocal;
+
+ context.this_ = _this;
+
+ scope.Close();
}
CYExpression *CYFunctionExpression::Replace(CYContext &context) {
return this;
}
-CYFunctionParameter *CYFunctionParameter::Replace(CYContext &context, CYBlock &code) {
- name_ = name_->Replace(context);
- context.scope_->Declare(context, name_, CYIdentifierArgument);
- if (next_ != NULL)
- next_ = next_->Replace(context, code);
- return this;
+void CYFunctionParameter::Replace(CYContext &context, CYBlock &code) { $T()
+ CYAssignment *assignment(initialiser_->Assignment(context));
+ context.Replace(initialiser_);
+
+ next_->Replace(context, code);
+
+ if (assignment != NULL)
+ // XXX: this cast is quite incorrect
+ code.AddPrev($ CYIf($ CYIdentical($ CYTypeOf(dynamic_cast<CYExpression *>(initialiser_)), $S("undefined")), $$->*
+ $E(assignment)
+ ));
}
CYStatement *CYFunctionStatement::Replace(CYContext &context) {
}
CYExpression *CYIndirect::Replace(CYContext &context) {
- CYPrefix::Replace(context);
return $M(rhs_, $S("$cyi"));
}
CYExpression *CYIndirectMember::Replace(CYContext &context) {
- Replace_(context);
return $M($ CYIndirect(object_), property_);
}
return this;
}
-CYStatement *CYLet::Replace(CYContext &context) {
- return $ CYWith($ CYObject(declarations_->Property(context)), &code_);
+CYStatement *CYLetStatement::Replace(CYContext &context) {
+ return $E($ CYCall(CYNonLocalize(context, $ CYFunctionExpression(NULL, declarations_->Parameter(context), code_)), declarations_->Argument(context)));
}
-void CYMember::Replace_(CYContext &context) {
- context.Replace(object_);
- context.Replace(property_);
-}
+namespace cy {
+namespace Syntax {
-CYExpression *CYNew::AddArgument(CYContext &context, CYExpression *value) {
- CYArgument **argument(&arguments_);
- while (*argument != NULL)
- argument = &(*argument)->next_;
- *argument = $ CYArgument(value);
+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);
}
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) {
return this;
}
-CYFunctionParameter *CYOptionalFunctionParameter::Replace(CYContext &context, CYBlock &code) {
- CYFunctionParameter *parameter($ CYFunctionParameter(name_, next_));
- parameter = parameter->Replace(context, code);
-
- CYVariable *name($ CYVariable(name_));
- code.AddPrev($ CYIf($ CYIdentical($ CYTypeOf(name), $S("undefined")), $$->*
- $E($ CYAssign(name, initializer_))
- ));
-
- return parameter;
-}
-
CYExpression *CYPostfix::Replace(CYContext &context) {
context.Replace(lhs_);
return this;
}
void CYProgram::Replace(CYContext &context) {
- CYScope scope;
- scope.parent_ = context.scope_;
- context.scope_ = &scope;
- statements_ = statements_->ReplaceAll(context);
- context.scope_ = scope.parent_;
- scope.Scope(context, statements_);
+ CYScope scope(true, context, statements_);
+
+ context.nextlocal_ = $ CYNonLocal();
+ context.ReplaceAll(statements_);
+ context.NonLocal(statements_);
+
+ scope.Close();
size_t offset(0);
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) {
const char *name;
if (context.options_.verbose_)
- name = apr_psprintf(context.pool_, "$%"APR_SIZE_T_FMT"", offset);
+ name = apr_psprintf($pool, "$%"APR_SIZE_T_FMT"", offset);
else {
char id[8];
id[7] = '\0';
goto id;
}
- name = apr_pstrmemdup(context.pool_, id + position, 7 - position);
+ name = apr_pstrmemdup($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);
}
}
void CYProperty::Replace(CYContext &context) { $T()
context.Replace(value_);
next_->Replace(context);
+ if (value_ == NULL)
+ value_ = $U;
}
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"), $V(context.nonlocal_->Target(context)), value)
+ ));
+ }
+
context.Replace(value_);
return this;
}
}
CYExpression *CYRubyProc::Replace(CYContext &context) {
- return $ CYFunctionExpression(NULL, parameters_, code_);
+ return CYNonLocalize(context, $ CYFunctionExpression(NULL, parameters_, code_));
+}
+
+CYScope::CYScope(bool transparent, CYContext &context, CYStatement *&statements) :
+ transparent_(transparent),
+ 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 (!transparent_ || flags == CYIdentifierArgument || flags == CYIdentifierCatch)
+ internal_.insert(CYIdentifierAddressFlagsMap::value_type(identifier, flags));
+ else if (parent_ != NULL)
+ parent_->Declare(context, identifier, flags);
}
CYIdentifier *CYScope::Lookup(CYContext &context, CYIdentifier *identifier) {
}
}
-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';
}
CYExpression *CYThis::Replace(CYContext &context) {
+ if (context.this_ != NULL)
+ return $V(context.this_->Identifier(context));
return this;
}
} }
CYStatement *CYVar::Replace(CYContext &context) {
- return $E(declarations_->Replace(context));
+ declarations_->Replace(context);
+ return $E(declarations_->Compound(context));
}
CYExpression *CYVariable::Replace(CYContext &context) {
- name_ = name_->Replace(context);
+ context.Replace(name_);
return this;
}
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