rstudio/src/cpp/r/RCntxt.cpp at master · pearsonca/rstudio · GitHub

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* RCntxt.cpp

* Unless you have received this program directly from RStudio pursuant

* to the terms of a commercial license agreement with RStudio, then

* this program is licensed to you under the terms of version 3 of the

* GNU Affero General Public License. This program is distributed WITHOUT

* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,

* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the

* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.

#include <r/RCntxt.hpp>

#include <r/RExec.hpp>

#include <r/RIntCntxt.hpp>

#include <r/RCntxtUtils.hpp>

#include <r/RInterface.hpp>

#include <boost/make_shared.hpp>

#include <shared_core/Error.hpp>

using namespace rstudio::core;

namespace rstudio {

namespace r {

namespace context {

RCntxt::RCntxt()

{ }

// constructs an RCntxt object from a raw RNTCXT* pointer; this is where the

// we set up the appropriate interface pointer based on the R version

RCntxt::RCntxt(void *rawCntxt)

{

if (rawCntxt == nullptr)

return;

else if (contextVersion() == RVersion40)

pCntxt_ = boost::make_shared<RIntCntxt<RCNTXT_40> >(

static_cast<RCNTXT_40*>(rawCntxt));

else if (contextVersion() == RVersion34)

pCntxt_ = boost::make_shared<RIntCntxt<RCNTXT_34> >(

static_cast<RCNTXT_34*>(rawCntxt));

else if (contextVersion() == RVersion33)

pCntxt_ = boost::make_shared<RIntCntxt<RCNTXT_33> >(

static_cast<RCNTXT_33*>(rawCntxt));

else

pCntxt_ = boost::make_shared<RIntCntxt<RCNTXT_32> >(

static_cast<RCNTXT_32*>(rawCntxt));

}

Error RCntxt::callSummary(std::string* pCallSummary) const

{

return invokeFunctionOnCall(".rs.callSummary", pCallSummary);

}

Error RCntxt::functionName(std::string* pFunctionName) const

{

return invokeFunctionOnCall(".rs.functionNameFromCall", pFunctionName);

}

bool RCntxt::isDebugHidden() const

{

SEXP hideFlag = r::sexp::getAttrib(callfun(), "hideFromDebugger");

return TYPEOF(hideFlag) != NILSXP && r::sexp::asLogical(hideFlag);

}

bool RCntxt::isErrorHandler() const

{

SEXP errFlag = r::sexp::getAttrib(callfun(), "errorHandlerType");

return TYPEOF(errFlag) == INTSXP;

}

bool RCntxt::hasSourceRefs() const

{

SEXP refs = sourceRefs();

return refs && TYPEOF(refs) != NILSXP;

}

SEXP RCntxt::sourceRefs() const

{

return r::sexp::getAttrib(originalFunctionCall(), "srcref");

}

std::string RCntxt::shinyFunctionLabel() const

{

std::string label;

SEXP s = r::sexp::getAttrib(originalFunctionCall() , "_rs_shinyDebugLabel");

if (s != nullptr && TYPEOF(s) != NILSXP)

{

r::sexp::extract(s, &label);

}

return label;

}

// enabling tracing on a function turns it into an S4 object with an 'original'

// slot that includes the function's original contents. use this instead if

// it's set up. (consider: is it safe to assume that S4 objects here are always

// traced functions, or do we need to compare classes to be safe?)

SEXP RCntxt::originalFunctionCall() const

{

SEXP callObject = callfun();

if (Rf_isS4(callObject))

{

callObject = r::sexp::getAttrib(callObject, "original");

}

return callObject;

}

Error RCntxt::fileName(std::string* pFileName) const

{

// skip over bytecode srcrefs

RCntxt context = *this;

SEXP ref = context.srcref();

while (ref && isByteCodeSrcRef(ref))

{

context = context.nextcontext();

if (context.isNull())

break;

ref = context.srcref();

}

if (ref && TYPEOF(ref) != NILSXP)

{

r::sexp::Protect protect;

SEXP fileName;

Error error = r::exec::RFunction(".rs.sourceFileFromRef")

.addParam(ref)

.call(&fileName, &protect);

if (error)

return error;

return r::sexp::extract(fileName, pFileName, true);

}

else

{

// If no source references, that's OK--just set an empty filename.

pFileName->clear();

return Success();

}

// call objects can't be passed as primary values through our R interface

// (early evaluation can be triggered) so we wrap them in an attribute attached

// to a dummy value when we need to pass them through

Error RCntxt::invokeFunctionOnCall(const char* rFunction,

std::string* pResult) const

{

SEXP result;

r::sexp::Protect protect;

SEXP val = r::sexp::create("_rs_callval", &protect);

r::sexp::setAttrib(val, "_rs_call", call());

Error error = r::exec::RFunction(rFunction, val)

.call(&result, &protect);

if (!error && r::sexp::length(result) > 0)

{

error = r::sexp::extract(result, pResult, true);

}

else

{

pResult->clear();

}

return error;

}

bool RCntxt::operator==(const RCntxt& other) const

{

return other.pCntxt_ == pCntxt_;

}

RCntxt::iterator RCntxt::begin()

{

return RCntxt::iterator(globalContext());

}

RCntxt::iterator RCntxt::end()

{

return RCntxt::iterator(RCntxt());

}

bool RCntxt::isNull() const

{

return pCntxt_ == nullptr;

}

SEXP RCntxt::callfun() const

{

return pCntxt_ ? pCntxt_->callfun() : R_NilValue;

}

int RCntxt::callflag() const

{

return pCntxt_ ? pCntxt_->callflag() : 0;

}

SEXP RCntxt::call() const

{

return pCntxt_ ? pCntxt_->call() : R_NilValue;

}

SEXP RCntxt::srcref() const

{

return pCntxt_ ? pCntxt_->srcref() : R_NilValue;

}

SEXP RCntxt::cloenv() const

{

return pCntxt_ ? pCntxt_->cloenv() : R_NilValue;

}

RCntxt RCntxt::nextcontext() const

{

return pCntxt_ ? pCntxt_->nextcontext() : RCntxt(nullptr);

}

} // namespace context

} // namespace r

} // namespace rstudio

rstudio/src/cpp/r/RCntxt.cpp at master · pearsonca/rstudio · GitHub

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