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/**-*-C++-*-
* \file
* \author Idar Tollefsen <idart@hotmail.com>
*
* \brief Creates a compilation database and caches it.
*
* Keeps a cache of the loaded compilation database, only creating a new
* one when needed.
*
* This file is distributed under the GNU General Public License.
* See COPYING for details.
*/
#ifndef IRONY_MODE_COMPDBCACHE_H_
#define IRONY_MODE_COMPDBCACHE_H_
#include "support/CIndex.h"
#include "support/NonCopyable.h"
#include <ctime>
#include <string>
class CompDBCache : public util::NonCopyable {
public:
CompDBCache();
~CompDBCache();
/**
* \brief Get a compilation database from a database found in a directory.
*
* This in essence a wrapper around
* \c clang_CompilationDatabase_fromDirectory() with added caching.
* It will either create a new compilation database or return the
* already loaded one (if any).
*
* This class owns the resulting compilation database.
* Therefore, unlike \c clang_CompilationDatabase_fromDirectory(),
* callers must NOT call \c clang_CompilationDatabase_dispose() on the
* returned compilation database. This class will handle that internally.
*
* \param buildDir Directory containing the database (such as
* "compile_commands.json") to create a compilation
* database from.
* \param error Error code from attempting to create a compilation
* database (\c CXCompilationDatabase_NoError on success).
*
* \return The compilation database or nullptr.
*/
CXCompilationDatabase fromDirectory(const std::string &buildDir,
CXCompilationDatabase_Error *error);
private:
/**
* \brief Clear the cache.
*
* This will dispose the currently loaded compilation database (if any) by
* calling \c clang_CompilationDatabase_dispose() on it. And it will reset
* other internal housekeeping variables related to the caching of the
* compilation database.
*/
void clear();
/**
* \brief Construct JSON compilation database filename.
*
* \param buildDir Directory that might contain "compile_commands.json".
*
* \return Path to "compilation_commands.json" in \c buildDir.
*/
std::string constructJsonDbFilename(const std::string &buildDir) const;
/**
* \brief Get modification time of a file.
*
* \param filename The file to get last modification time of.
*
* \return The modification time of \c filename or 0.
*/
time_t modificationTime(const std::string &filename) const;
CXCompilationDatabase db_;
std::string filename_;
time_t mtime_;
};
#endif
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