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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmFunctionCommand.h"
#include <sstream>
#include <utility>
#include "cmAlgorithms.h"
#include "cmExecutionStatus.h"
#include "cmMakefile.h"
#include "cmPolicies.h"
#include "cmRange.h"
#include "cmState.h"
#include "cmStringAlgorithms.h"
// define the class for function commands
class cmFunctionHelperCommand
{
public:
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
bool operator()(std::vector<cmListFileArgument> const& args,
cmExecutionStatus& inStatus) const;
std::vector<std::string> Args;
std::vector<cmListFileFunction> Functions;
cmPolicies::PolicyMap Policies;
std::string FilePath;
};
bool cmFunctionHelperCommand::operator()(
std::vector<cmListFileArgument> const& args,
cmExecutionStatus& inStatus) const
{
cmMakefile& makefile = inStatus.GetMakefile();
// Expand the argument list to the function.
std::vector<std::string> expandedArgs;
makefile.ExpandArguments(args, expandedArgs);
// make sure the number of arguments passed is at least the number
// required by the signature
if (expandedArgs.size() < this->Args.size() - 1) {
std::string errorMsg =
"Function invoked with incorrect arguments for function named: ";
errorMsg += this->Args[0];
inStatus.SetError(errorMsg);
return false;
}
cmMakefile::FunctionPushPop functionScope(&makefile, this->FilePath,
this->Policies);
// set the value of argc
std::ostringstream strStream;
strStream << expandedArgs.size();
makefile.AddDefinition("ARGC", strStream.str());
makefile.MarkVariableAsUsed("ARGC");
// set the values for ARGV0 ARGV1 ...
for (unsigned int t = 0; t < expandedArgs.size(); ++t) {
std::ostringstream tmpStream;
tmpStream << "ARGV" << t;
makefile.AddDefinition(tmpStream.str(), expandedArgs[t]);
makefile.MarkVariableAsUsed(tmpStream.str());
}
// define the formal arguments
for (unsigned int j = 1; j < this->Args.size(); ++j) {
makefile.AddDefinition(this->Args[j], expandedArgs[j - 1]);
}
// define ARGV and ARGN
std::string argvDef = cmJoin(expandedArgs, ";");
std::vector<std::string>::const_iterator eit =
expandedArgs.begin() + (this->Args.size() - 1);
std::string argnDef = cmJoin(cmMakeRange(eit, expandedArgs.end()), ";");
makefile.AddDefinition("ARGV", argvDef);
makefile.MarkVariableAsUsed("ARGV");
makefile.AddDefinition("ARGN", argnDef);
makefile.MarkVariableAsUsed("ARGN");
// Invoke all the functions that were collected in the block.
// for each function
for (cmListFileFunction const& func : this->Functions) {
cmExecutionStatus status(makefile);
if (!makefile.ExecuteCommand(func, status) || status.GetNestedError()) {
// The error message should have already included the call stack
// so we do not need to report an error here.
functionScope.Quiet();
inStatus.SetNestedError();
return false;
}
if (status.GetReturnInvoked()) {
return true;
}
}
// pop scope on the makefile
return true;
}
bool cmFunctionFunctionBlocker::IsFunctionBlocked(
const cmListFileFunction& lff, cmMakefile& mf, cmExecutionStatus&)
{
// record commands until we hit the ENDFUNCTION
// at the ENDFUNCTION call we shift gears and start looking for invocations
if (lff.Name.Lower == "function") {
this->Depth++;
} else if (lff.Name.Lower == "endfunction") {
// if this is the endfunction for this function then execute
if (!this->Depth) {
// create a new command and add it to cmake
cmFunctionHelperCommand f;
f.Args = this->Args;
f.Functions = this->Functions;
f.FilePath = this->GetStartingContext().FilePath;
mf.RecordPolicies(f.Policies);
mf.GetState()->AddScriptedCommand(this->Args[0], std::move(f));
// remove the function blocker now that the function is defined
mf.RemoveFunctionBlocker(this, lff);
return true;
}
// decrement for each nested function that ends
this->Depth--;
}
// if it wasn't an endfunction and we are not executing then we must be
// recording
this->Functions.push_back(lff);
return true;
}
bool cmFunctionFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
cmMakefile& mf)
{
if (lff.Name.Lower == "endfunction") {
std::vector<std::string> expandedArguments;
mf.ExpandArguments(lff.Arguments, expandedArguments,
this->GetStartingContext().FilePath.c_str());
// if the endfunction has arguments then make sure
// they match the ones in the opening function command
if ((expandedArguments.empty() ||
(expandedArguments[0] == this->Args[0]))) {
return true;
}
}
return false;
}
bool cmFunctionCommand::InitialPass(std::vector<std::string> const& args,
cmExecutionStatus&)
{
if (args.empty()) {
this->SetError("called with incorrect number of arguments");
return false;
}
// create a function blocker
{
auto fb = cm::make_unique<cmFunctionFunctionBlocker>();
cmAppend(fb->Args, args);
this->Makefile->AddFunctionBlocker(std::move(fb));
}
return true;
}
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