lyx_mirror/src/DepTable.h

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// -*- C++ -*-
/* This file is part of
* ======================================================
*
* LyX, The Document Processor
* Copyright 1995 Matthias Ettrich
* Copyright 1995-2001 The LyX Team.
*
* This file is Copyright 1996-2001
* Lars Gullik Bj<EFBFBD>nnes
* Ben Stanley
*
* ======================================================
*/
#ifndef DEP_TABLE_H
#define DEP_TABLE_H
#include "LString.h"
#include <map>
#ifdef __GNUG__
#pragma interface
#endif
///
class DepTable {
public:
/** This one is a little bit harder since we need the absolute
filename. Should we insert files with .sty .cls etc as
extension? */
void insert(string const & f,
bool upd = false);
///
void update();
///
void write(string const & f) const;
///
void read(string const & f);
/// returns true if any of the files has changed
bool sumchange() const;
/// return true if fil has changed.
bool haschanged(string const & fil) const;
/// return true if a file with extension ext has changed.
bool extchanged(string const & ext) const;
///
bool exist(string const & fil) const;
/// returns true if any files with ext exist
bool ext_exist(string const & ext) const;
///
void remove_files_with_extension(string const &);
///
void remove_file(string const &);
private:
///
struct dep_info {
/// Previously calculated CRC value
unsigned long crc_prev;
/// Current CRC value - only re-computed if mtime has changed.
unsigned long crc_cur;
/// mtime from last time current CRC was calculated.
long mtime_cur;
///
bool changed() const;
};
///
typedef std::map<string, dep_info> DepList;
///
DepList deplist;
};
#endif