101 lines
2.2 KiB
101 lines
2.2 KiB
/*
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* MappedFile.h
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*
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* Created on: Jan 21, 2014
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* Author: Manuel Sascha Weiand
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*/
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#ifndef STORM_PARSER_MAPPEDFILE_H_
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#define STORM_PARSER_MAPPEDFILE_H_
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#include <sys/stat.h>
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#include "src/utility/OsDetection.h"
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namespace storm {
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namespace parser {
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/*!
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* @brief Opens a file and maps it to memory providing a char*
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* containing the file content.
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*
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* This class is a very simple interface to read files efficiently.
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* The given file is opened and mapped to memory using mmap().
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* The public member data is a pointer to the actual file content.
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* Using this method, the kernel will take care of all buffering. This is
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* most probably much more efficient than doing this manually.
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*/
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#if !defined LINUX && !defined MACOSX && !defined WINDOWS
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#error Platform not supported
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#endif
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class MappedFile {
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public:
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/*!
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* Constructor of MappedFile.
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* Will stat the given file, open it and map it to memory.
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* If anything of this fails, an appropriate exception is raised
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* and a log entry is written.
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* @param filename file to be opened
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*/
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MappedFile(const char* filename);
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/*!
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* Destructor of MappedFile.
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* Will unmap the data and close the file.
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*/
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~MappedFile();
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/*!
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* @brief Tests whether the given file exists and is readable.
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* @return True iff the file exists and is readable.
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*/
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static bool fileExistsAndIsReadable(const char* fileName);
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/*!
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* @brief pointer to actual file content.
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*/
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char* data;
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/*!
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* @brief pointer to end of file content.
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*/
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char* dataend;
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private:
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#if defined LINUX || defined MACOSX
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/*!
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* @brief file descriptor obtained by open().
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*/
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int file;
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#elif defined WINDOWS
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HANDLE file;
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HANDLE mapping;
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#endif
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#if defined LINUX
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/*!
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* @brief stat information about the file.
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*/
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struct stat64 st;
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#elif defined MACOSX
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/*!
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* @brief stat information about the file.
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*/
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struct stat st;
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#elif defined WINDOWS
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/*!
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* @brief stat information about the file.
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*/
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struct __stat64 st;
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#endif
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};
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} // namespace parser
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} // namespace storm
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#endif /* STORM_PARSER_MAPPEDFILE_H_ */
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