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// Copyright (c) 1997 James Clark
// See the file copying.txt for copying permission.
#include "stylelib.h"
#include "MacroFlowObj.h"
#include "VM.h"
#include "Insn2.h"
#include "Insn.h"
#include "Expression.h"
#include "Interpreter.h"
#include "ProcessContext.h"
#include <OpenSP/macros.h>
#ifdef DSSSL_NAMESPACE
namespace DSSSL_NAMESPACE {
#endif
MacroFlowObj::MacroFlowObj(Vector<const Identifier *> &nics,
NCVector<Owner<Expression> > &inits,
const Identifier *contentsId,
Owner<Expression> &body)
: sp_(new S(new Definition(nics, inits, contentsId, body)))
{
size_t n = sp_->def_->nics().size();
sp_->charicVals_ = new ELObj *[n];
for (size_t i = 0; i < n; i++)
sp_->charicVals_[i] = 0;
}
MacroFlowObj::MacroFlowObj(const MacroFlowObj &obj)
: CompoundFlowObj(obj), sp_(new S(obj.sp_->def_.pointer()))
{
size_t n = sp_->def_->nics().size();
sp_->charicVals_ = new ELObj *[n];
for (size_t i = 0; i < n; i++)
sp_->charicVals_[i] = obj.sp_->charicVals_[i];
}
MacroFlowObj::~MacroFlowObj()
{
delete [] sp_->charicVals_;
}
FlowObj *MacroFlowObj::copy(Collector &c) const
{
return new (c) MacroFlowObj(*this);
}
CompoundFlowObj *MacroFlowObj::asCompoundFlowObj()
{
if (sp_->def_->isCompound())
return this;
else
return 0;
}
bool MacroFlowObj::hasNonInheritedC(const Identifier *id) const
{
const Vector<const Identifier *> &nics = sp_->def_->nics();
for (size_t i = 0; i < nics.size(); i++)
if (nics[i] == id)
return 1;
return 0;
}
void MacroFlowObj::setNonInheritedC(const Identifier *id, ELObj *obj, const Location &, Interpreter &)
{
const Vector<const Identifier *> &nics = sp_->def_->nics();
for (size_t i = 0;; i++) {
if (nics[i] == id) {
sp_->charicVals_[i] = obj;
return;
}
}
}
void MacroFlowObj::traceSubObjects(Collector &c) const
{
size_t n = sp_->def_->nics().size();
for (size_t i = 0; i < n; i++)
c.trace(sp_->charicVals_[i]);
CompoundFlowObj::traceSubObjects(c);
}
class EmptyStyleObj : public StyleObj {
public:
void appendIter(StyleObjIter &) const { }
};
void MacroFlowObj::unpack(VM &vm)
{
size_t n = sp_->def_->nics().size();
vm.needStack(n + 1 + sp_->def_->isCompound());
for (size_t i = 0; i < n; i++)
*vm.sp++ = sp_->charicVals_[i];
if (sp_->def_->isCompound()) {
ELObj *tem = content();
if (!tem)
tem = new (*vm.interp) ProcessChildrenSosofoObj(vm.interp->initialProcessingMode(), location());
*vm.sp++ = tem;
}
}
void MacroFlowObj::processInner(ProcessContext &context)
{
FOTBuilder &fotb = context.currentFOTBuilder();
fotb.startSequence();
sp_->def_->process(context, this);
fotb.endSequence();
}
MacroFlowObj::Definition::Definition(Vector<const Identifier *> &charics,
NCVector<Owner<Expression> > &charicInits,
const Identifier *contentsId,
Owner<Expression> &body)
: contentsId_(contentsId)
{
charics.swap(charics_);
charicInits.swap(charicInits_);
charicInits_.resize(charics_.size());
body.swap(body_);
}
void MacroFlowObj::Definition::process(ProcessContext &context,
MacroFlowObj *macro)
{
VM &vm = context.vm();
Interpreter &interp = *vm.interp;;
if (code_.isNull())
compile(interp);
StyleStack *saveStyleStack = vm.styleStack;
vm.styleStack = &context.currentStyleStack();
unsigned saveSpecLevel = vm.specLevel;
vm.specLevel = vm.styleStack->level();
Vector<size_t> dep;
vm.actualDependencies = &dep;
ELObj *obj = context.vm().eval(code_.pointer(), 0, macro);
vm.styleStack = saveStyleStack;
vm.specLevel = saveSpecLevel;
if (!interp.isError(obj)) {
ELObjDynamicRoot protect(interp, obj);
((SosofoObj *)obj)->process(context);
}
}
class UnpackMacroFlowObjInsn : public Insn {
public:
UnpackMacroFlowObjInsn(InsnPtr next) : next_(next) { }
const Insn *execute(VM &vm) const {
((MacroFlowObj *)*--vm.sp)->unpack(vm);
return next_.pointer();
}
private:
InsnPtr next_;
};
void MacroFlowObj::Definition::compile(Interpreter &interp)
{
InsnPtr result;
result = new CheckSosofoInsn(body_->location(), result);
int nPush = charics_.size() + (contentsId_ != 0);
result = PopBindingsInsn::make(nPush, result);
BoundVarList frameVars;
for (size_t i = 0; i < charics_.size(); i++) {
if (i > 0 && charicInits_[i])
charicInits_[i]->markBoundVars(frameVars, 0);
frameVars.append(charics_[i], 0);
}
if (contentsId_)
frameVars.append(contentsId_, 0);
body_->markBoundVars(frameVars, 0);
result = Expression::optimizeCompile(body_, interp,
Environment(frameVars, BoundVarList()),
nPush, result);
for (size_t i = charics_.size(); i > 0; i--) {
int stackOffset = int(i) - nPush - 1;
if (frameVars[i - 1].boxed())
result = new BoxStackInsn(stackOffset, result);
InsnPtr ifNull = new SetKeyArgInsn(stackOffset, result);
if (charicInits_[i - 1]) {
BoundVarList f(frameVars);
f.resize(i - 1);
ifNull = Expression::optimizeCompile(charicInits_[i - 1], interp,
Environment(f, BoundVarList()),
nPush, ifNull);
}
else
ifNull = new ConstantInsn(interp.makeFalse(), ifNull);
result = new TestNullInsn(stackOffset, ifNull, result);
}
code_ = new UnpackMacroFlowObjInsn(result);
}
#ifdef DSSSL_NAMESPACE
}
#endif
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