-/* 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"
}
CYStatement *CYBlock::Replace(CYContext &context) {
- statements_ = statements_->ReplaceAll(context);
+ context.ReplaceAll(statements_);
if (statements_ == NULL)
return $ CYEmpty();
return this;
return this;
}
+CYExpression *CYCall::AddArgument(CYContext &context, CYExpression *value) {
+ CYArgument **argument(&arguments_);
+ while (*argument != NULL)
+ argument = &(*argument)->next_;
+ *argument = $ CYArgument(value);
+ return this;
+}
+
CYExpression *CYCall::Replace(CYContext &context) {
context.Replace(function_);
arguments_->Replace(context);
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);
}
}
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 { $T(NULL)
return this;
}
+void CYContext::NonLocal(CYStatement *&statements) {
+ CYContext &context(*this);
+
+ if (nextlocal_ != NULL && nextlocal_->identifier_ != NULL) {
+ CYIdentifier *cye($I("$cye")->Replace(context));
+ CYIdentifier *unique(nextlocal_->identifier_->Replace(context));
+
+ CYStatement *declare(
+ $ CYVar($L1($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 = $$->*
+ 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;
}
}
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)
}
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;
return this;
}
+CYExpression *CYExpression::AddArgument(CYContext &context, CYExpression *value) {
+ return $C1(this, value);
+}
+
CYExpression *CYExpression::ClassName(CYContext &context, bool object) {
return this;
}
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);
}
}
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($$->*
+ $E($ CYAssign(initialiser_->ForEachIn(context), $M($V(cys), $V(cyt))))->*
code_
))
);
}
CYStatement *CYForEachInComprehension::Replace(CYContext &context, CYStatement *statement) const {
- CYVariable *cys($V("$cys")), *name($ CYVariable(name_));
+ CYIdentifier *cys($I("cys"));
return $E($C0($F(NULL, $P1("$cys"), $$->*
- $E($ 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)
))
)));
if (outer)
Inject(context);
- parent_ = context.scope_;
- context.scope_ = this;
+ CYScope scope(CYScopeFunction, context, code_.statements_);
+
+ 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_;
+ }
if (!outer && name_ != NULL)
Inject(context);
- parameters_->Replace(context);
+ if (parameters_ != NULL)
+ parameters_ = parameters_->Replace(context, code_);
+
code_.Replace(context);
- context.scope_ = parent_;
- Scope(context, code_.statements_);
+ if (localize)
+ context.NonLocal(code_.statements_);
+
+ context.nextlocal_ = nextlocal;
+ context.nonlocal_ = nonlocal;
+
+ scope.Close();
}
CYExpression *CYFunctionExpression::Replace(CYContext &context) {
return this;
}
-void CYFunctionParameter::Replace(CYContext &context) { $T()
- name_ = name_->Replace(context);
+CYFunctionParameter *CYFunctionParameter::Replace(CYContext &context, CYBlock &code) {
+ context.Replace(name_);
context.scope_->Declare(context, name_, CYIdentifierArgument);
- next_->Replace(context);
+ if (next_ != NULL)
+ next_ = next_->Replace(context, code);
+ return this;
}
CYStatement *CYFunctionStatement::Replace(CYContext &context) {
}
CYIdentifier *CYIdentifier::Replace(CYContext &context) {
- if (replace_ == NULL)
- replace_ = context.scope_->Lookup(context, this);
+ if (replace_ != NULL && replace_ != this)
+ return replace_->Replace(context);
+ replace_ = context.scope_->Lookup(context, this);
return replace_;
}
context.Replace(property_);
}
-CYExpression *CYNew::Replace(CYContext &context) {
+namespace cy {
+namespace Syntax {
+
+CYExpression *New::AddArgument(CYContext &context, CYExpression *value) {
+ CYSetLast(arguments_, $ CYArgument(value));
+ return this;
+}
+
+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);
+ context.Replace(initializer_);
+
+ CYVariable *name($V(name_));
+ code.AddPrev($ CYIf($ CYIdentical($ CYTypeOf(name), $S("undefined")), $$->*
+ $E($ CYAssign(name, initializer_))
+ ));
+
+ return parameter;
+}
+
CYExpression *CYPostfix::Replace(CYContext &context) {
context.Replace(lhs_);
return this;
return this;
}
-void CYProgram::Replace(CYContext &context) {
- parent_ = context.scope_;
- CYProgram *program(context.program_);
+// XXX: this is evil evil black magic. don't ask, don't tell... don't believe!
+#define MappingSet "0etnirsoalfucdphmgyvbxTwSNECAFjDLkMOIBPqzRH$_WXUVGYKQJZ"
+//#define MappingSet "0abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_"
+
+namespace {
+ struct IdentifierUsageLess :
+ std::binary_function<CYIdentifier *, CYIdentifier *, bool>
+ {
+ _finline bool operator ()(CYIdentifier *lhs, CYIdentifier *rhs) const {
+ if (lhs->usage_ != rhs->usage_)
+ return lhs->usage_ > rhs->usage_;
+ return lhs < rhs;
+ }
+ };
+
+ typedef std::set<CYIdentifier *, IdentifierUsageLess> IdentifierUsages;
+}
- context.scope_ = this;
- context.program_ = this;
+void CYProgram::Replace(CYContext &context) {
+ CYScope scope(CYScopeProgram, context, statements_);
- statements_ = statements_->ReplaceAll(context);
+ context.nextlocal_ = $ CYNonLocal();
+ context.ReplaceAll(statements_);
+ context.NonLocal(statements_);
- context.scope_ = parent_;
- context.program_ = program;
- Scope(context, statements_);
+ scope.Close();
size_t offset(0);
CYCStringSet external;
- for (CYIdentifierValueSet::const_iterator i(identifiers_.begin()); i != identifiers_.end(); ++i)
+ for (CYIdentifierValueSet::const_iterator i(scope.identifiers_.begin()); i != scope.identifiers_.end(); ++i)
external.insert((*i)->Word());
+ IdentifierUsages usages;
+
+ if (offset < context.rename_.size())
+ CYForEach (i, context.rename_[offset].identifier_)
+ usages.insert(i);
+
// XXX: totalling the probable occurrences and sorting by them would improve the result
- for (CYIdentifierAddressVector::const_iterator i(rename_.begin()); i != rename_.end(); ++i, ++offset) {
+ for (CYIdentifierUsageVector::const_iterator i(context.rename_.begin()); i != context.rename_.end(); ++i, ++offset) {
+ //std::cout << *i << ":" << (*i)->offset_ << std::endl;
+
const char *name;
if (context.options_.verbose_)
- name = apr_psprintf(context.pool_, "$%"APR_SIZE_T_FMT"", offset);
+ name = apr_psprintf($pool, "$%"APR_SIZE_T_FMT"", offset);
else {
char id[8];
id[7] = '\0';
unsigned position(7), local(offset + 1);
do {
- unsigned index(local % 53);
- local /= 53;
- id[--position] = index == 0 ? '0' : index < 27 ? index - 1 + 'a' : index - 27 + 'A';
+ unsigned index(local % (sizeof(MappingSet) - 1));
+ local /= sizeof(MappingSet) - 1;
+ id[--position] = MappingSet[index];
} while (local != 0);
if (external.find(id + position) != external.end()) {
goto id;
}
- name = apr_pstrmemdup(context.pool_, id + position, 7 - position);
+ name = apr_pstrmemdup($pool, id + position, 7 - position);
// XXX: at some point, this could become a keyword
}
- for (CYIdentifier *identifier(*i); identifier != NULL; identifier = identifier->next_)
+ CYForEach (identifier, i->identifier_)
identifier->Set(name);
}
}
}
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"), $V(context.nonlocal_->Target(context)), value)
+ ));
+ }
+
context.Replace(value_);
return this;
}
+CYExpression *CYRubyBlock::Replace(CYContext &context) {
+ // XXX: this needs to do something much more epic to handle return
+ return call_->AddArgument(context, proc_->Replace(context));
+}
+
+CYExpression *CYRubyProc::Replace(CYContext &context) {
+ CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
+ 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;
+}
+
+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) {
}
void CYScope::Merge(CYContext &context, CYIdentifier *identifier) {
- std::pair<CYIdentifierAddressSet::iterator, bool> insert(identifiers_.insert(identifier));
+ std::pair<CYIdentifierValueSet::iterator, bool> insert(identifiers_.insert(identifier));
if (!insert.second) {
if ((*insert.first)->offset_ < identifier->offset_)
(*insert.first)->offset_ = identifier->offset_;
identifier->replace_ = *insert.first;
+ (*insert.first)->usage_ += identifier->usage_ + 1;
}
}
+namespace {
+ struct IdentifierOffset {
+ size_t offset_;
+ CYIdentifierFlags flags_;
+ size_t usage_;
+ CYIdentifier *identifier_;
+
+ IdentifierOffset(CYIdentifier *identifier, CYIdentifierFlags flags) :
+ offset_(identifier->offset_),
+ flags_(flags),
+ usage_(identifier->usage_),
+ identifier_(identifier)
+ {
+ }
+ };
+
+ struct IdentifierOffsetLess :
+ std::binary_function<const IdentifierOffset &, const IdentifierOffset &, bool>
+ {
+ _finline bool operator ()(const IdentifierOffset &lhs, const IdentifierOffset &rhs) const {
+ if (lhs.offset_ != rhs.offset_)
+ return lhs.offset_ < rhs.offset_;
+ if (lhs.flags_ != rhs.flags_)
+ return lhs.flags_ < rhs.flags_;
+ /*if (lhs.usage_ != rhs.usage_)
+ return lhs.usage_ < rhs.usage_;*/
+ return lhs.identifier_ < rhs.identifier_;
+ }
+ };
+
+ typedef std::set<IdentifierOffset, IdentifierOffsetLess> IdentifierOffsets;
+}
+
void CYScope::Scope(CYContext &context, CYStatement *&statements) {
+ if (parent_ == NULL)
+ return;
+
CYDeclarations *last(NULL), *curr(NULL);
- CYProgram *program(context.program_);
- typedef std::multimap<size_t, CYIdentifier *> IdentifierOffsetMap;
- IdentifierOffsetMap offsetted;
+ IdentifierOffsets offsets;
+
+ for (CYIdentifierAddressFlagsMap::const_iterator i(internal_.begin()); i != internal_.end(); ++i)
+ if (i->second != CYIdentifierMagic)
+ offsets.insert(IdentifierOffset(i->first, i->second));
+
+ size_t offset(0);
- // XXX: we don't want to do this in order, we want to sort it by probable occurrence
- for (CYIdentifierAddressFlagsMap::const_iterator i(internal_.begin()); i != internal_.end(); ++i) {
- if (program != NULL && i->second != CYIdentifierMagic)
- offsetted.insert(IdentifierOffsetMap::value_type(i->first->offset_, i->first));
- if (i->second == CYIdentifierVariable) {
- CYDeclarations *next($ CYDeclarations($ CYDeclaration(i->first)));
+ for (IdentifierOffsets::const_iterator i(offsets.begin()); i != offsets.end(); ++i) {
+ if (i->flags_ == CYIdentifierVariable) {
+ CYDeclarations *next($ CYDeclarations($ CYDeclaration(i->identifier_)));
if (last == NULL)
last = next;
if (curr != NULL)
curr->SetNext(next);
curr = next;
}
- }
- size_t offset(0);
+ if (offset < i->offset_)
+ offset = i->offset_;
+ if (context.rename_.size() <= offset)
+ context.rename_.resize(offset + 1);
- for (IdentifierOffsetMap::const_iterator i(offsetted.begin()); i != offsetted.end(); ++i) {
- if (offset < i->first)
- offset = i->first;
- if (program->rename_.size() <= offset)
- program->rename_.resize(offset + 1);
- CYIdentifier *&identifier(program->rename_[offset++]);
- i->second->SetNext(identifier);
- identifier = i->second;
+ CYIdentifierUsage &rename(context.rename_[offset++]);
+ i->identifier_->SetNext(rename.identifier_);
+ rename.identifier_ = i->identifier_;
+ rename.usage_ += i->identifier_->usage_ + 1;
}
if (last != NULL) {
for (CYIdentifierValueSet::const_iterator i(identifiers_.begin()); i != identifiers_.end(); ++i)
if (internal_.find(*i) == internal_.end()) {
+ //std::cout << *i << '=' << offset << std::endl;
if ((*i)->offset_ < offset)
(*i)->offset_ = offset;
parent_->Merge(context, *i);
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 *CYVariable::Replace(CYContext &context) {
- name_ = name_->Replace(context);
+ context.Replace(name_);
return this;
}
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