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// dirsearch.h -- directory searching for gold -*- C++ -*-
// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
#ifndef GOLD_DIRSEARCH_H
#define GOLD_DIRSEARCH_H
#include <string>
#include <list>
#include "options.h"
#include "token.h"
namespace gold
{
class General_options;
class Workqueue;
// A simple interface to manage directories to be searched for
// libraries.
class Dirsearch
{
public:
Dirsearch()
: directories_(NULL), token_(true)
{ }
// Set the list of directories to search.
void
initialize(Workqueue*, const General_options::Dir_list*);
// Search for a file, giving one or two names to search for (the
// second one may be empty). Return a full path name for the file,
// or the empty string if it could not be found. This may only be
// called if the token is not blocked. Set *IS_IN_SYSROOT if the
// file was found in a directory which is in the sysroot. *PINDEX
// should be set to zero the first time this is called; it will be
// updated with the index of the directory where the file is found,
// and that value plus one may be used to find the next file with
// the same name(s).
std::string
find(const std::vector<std::string>& names, bool* is_in_sysroot,
int* pindex, std::string *found_name) const;
// Return the blocker token which controls access.
Task_token*
token()
{ return &this->token_; }
// Search for a file in a directory list. This is a low-level function and
// therefore can be used before options and parameters are set.
static std::string
find_file_in_dir_list(const std::string& name,
const General_options::Dir_list& directories,
const std::string& extra_search_dir);
private:
// We can not copy this class.
Dirsearch(const Dirsearch&);
Dirsearch& operator=(const Dirsearch&);
// Directories to search.
const General_options::Dir_list* directories_;
// Blocker token to control access from tasks.
Task_token token_;
};
} // End namespace gold.
#endif // !defined(GOLD_DIRSEARCH_H)
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