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// Copyright (c) 1999 Matthias Clasen
// See the file copying.txt for copying permission.
#include "stylelib.h"
#include "TransformationMode.h"
#include "Expression.h"
#include "Interpreter.h"
#include "InterpreterMessages.h"
#include "ELObjMessageArg.h"
#include "VM.h"
#include <stdlib.h> // for qsort
#ifdef DSSSL_NAMESPACE
namespace DSSSL_NAMESPACE {
#endif
TransformationMode::TransformationMode()
{
}
void TransformationMode::Action::get(InsnPtr &insn, Vector<CreateSpecObj *> &specs) const
{
insn = insn_;
specs = specs_;
}
const Location &TransformationMode::Action::location() const
{
return defLoc_;
}
TransformationMode::Action &TransformationMode::Association::action()
{
return *action_;
}
long TransformationMode::Association::priority() const
{
return priority_;
}
const TransformationMode::Action &TransformationMode::Association::action() const
{
return *action_;
}
unsigned TransformationMode::Action::partIndex() const
{
return partIndex_;
}
const Location &TransformationMode::Association::location() const
{
return action_->location();
}
extern "C" {
static int associationCompare(const void *p1, const void *p2)
{
return (*(const TransformationMode::Association *const *)p1)->priority()
- (*(const TransformationMode::Association *const *)p2)->priority();
};
}
void TransformationMode::compile(Interpreter &interp, const NodePtr &node)
{
for (size_t j = 0; j < associations_.size(); j++)
associations_[j].compile(interp, node);
qsort(&associations_[0], associations_.size(),
sizeof(associations_[0]), associationCompare);
}
TransformationMode::Action::Action(unsigned partIndex, Owner<Expression> &expr,
const Location &loc)
: partIndex_(partIndex), defLoc_(loc)
{
expr.swap(expr_);
}
TransformationMode::Association::Association()
: action_(0), priority_(0), nl_(0)
{
}
TransformationMode::Association::Association(Owner<Expression> &qexpr,
Owner<Expression> &pexpr,
const Ptr<TransformationMode::Action> &action)
: action_(action), priority_(0), nl_(0)
{
qexpr.swap(qexpr_);
pexpr.swap(pexpr_);
}
void TransformationMode::Association::swap(Association &a)
{
action_.swap(a.action_);
qexpr_.swap(a.qexpr_);
pexpr_.swap(a.pexpr_);
}
void TransformationMode::Association::compile(Interpreter &interp, const NodePtr &node)
{
action_->compile(interp);
qexpr_->optimize(interp, Environment(), qexpr_);
ELObj *tem = qexpr_->constantValue();
if (!tem) {
InsnPtr insn = qexpr_->compile(interp, Environment(), 0, InsnPtr());
VM vm(interp);
EvalContext::CurrentNodeSetter cns(node, 0, vm);
tem = vm.eval(insn.pointer());
}
if (tem->asNodeList())
nl_ = tem->asNodeList();
else {
interp.setNextLocation(qexpr_->location());
interp.message(InterpreterMessages::queryNotANodeList,
ELObjMessageArg(tem, interp));
nl_ = interp.makeEmptyNodeList();
}
pexpr_->optimize(interp, Environment(), pexpr_);
tem = pexpr_->constantValue();
if (!tem) {
InsnPtr insn = pexpr_->compile(interp, Environment(), 0, InsnPtr());
VM vm(interp);
EvalContext::CurrentNodeSetter cns(node, 0, vm);
tem = vm.eval(insn.pointer());
}
if (!tem->exactIntegerValue(priority_)) {
interp.setNextLocation(pexpr_->location());
interp.message(InterpreterMessages::priorityNotAnExactInteger,
ELObjMessageArg(tem, interp));
priority_ = 0;
}
}
void TransformationMode::Action::compile(Interpreter &interp)
{
expr_->optimize(interp, Environment(), expr_);
ELObj *tem = expr_->constantValue();
if (tem) {
if (tem->asCreateSpec())
specs_.push_back(tem->asCreateSpec());
else if (tem->asPair())
// must be a list of create-specs then
for (;;) {
PairObj *pair = tem->asPair();
if (pair) {
CreateSpecObj *cspec = pair->car()->asCreateSpec();
if (!cspec) {
interp.setNextLocation(expr_->location());
interp.message(InterpreterMessages::notACspecList,
ELObjMessageArg(tem, interp));
}
else
specs_.push_back(cspec);
tem = pair->cdr();
}
else if (tem->isNil())
break;
else {
interp.setNextLocation(expr_->location());
interp.message(InterpreterMessages::notACspecList,
ELObjMessageArg(tem, interp));
return;
}
}
else {
interp.setNextLocation(expr_->location());
interp.message(InterpreterMessages::notACspecOrCspecList,
ELObjMessageArg(tem, interp));
return;
}
}
else {
insn_ = expr_->compile(interp, Environment(), 0, InsnPtr());
}
}
void TransformationMode::addAssociation(Owner<Expression> &qexpr,
Owner<Expression> &texpr,
Owner<Expression> &pexpr,
const Location &loc,
Interpreter &interp)
{
Ptr<Action> action = new Action(interp.currentPartIndex(), texpr, loc);
Association assoc(qexpr, pexpr, action);
associations_.resize(associations_.size() + 1);
associations_.back().swap(assoc);
}
#ifdef DSSSL_NAMESPACE
}
#endif
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