llvm-6502/tools/llvmc2/Action.cpp
2008-05-30 18:48:52 +00:00

79 lines
2.1 KiB
C++

//===--- Action.cpp - The LLVM Compiler Driver ------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open
// Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Action class - implementation and auxiliary functions.
//
//===----------------------------------------------------------------------===//
#include "Action.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/System/Program.h"
#include <iostream>
#include <stdexcept>
using namespace llvm;
using namespace llvmc;
extern cl::opt<bool> DryRun;
extern cl::opt<bool> VerboseMode;
namespace {
int ExecuteProgram(const std::string& name,
const StrVector& args) {
sys::Path prog = sys::Program::FindProgramByName(name);
if (prog.isEmpty())
throw std::runtime_error("Can't find program '" + name + "'");
if (!prog.canExecute())
throw std::runtime_error("Program '" + name + "' is not executable.");
// Build the command line vector and the redirects array.
const sys::Path* redirects[3] = {0,0,0};
sys::Path stdout_redirect;
std::vector<const char*> argv;
argv.reserve((args.size()+2));
argv.push_back(name.c_str());
for (StrVector::const_iterator B = args.begin(), E = args.end();
B!=E; ++B) {
if (*B == ">") {
++B;
stdout_redirect.set(*B);
redirects[1] = &stdout_redirect;
}
else {
argv.push_back((*B).c_str());
}
}
argv.push_back(0); // null terminate list.
// Invoke the program.
return sys::Program::ExecuteAndWait(prog, &argv[0], 0, &redirects[0]);
}
void print_string (const std::string& str) {
std::cerr << str << ' ';
}
}
int llvmc::Action::Execute() const {
if (DryRun || VerboseMode) {
std::cerr << Command_ << " ";
std::for_each(Args_.begin(), Args_.end(), print_string);
std::cerr << '\n';
}
if (DryRun)
return 0;
else
return ExecuteProgram(Command_, Args_);
}