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moving implementation of MappedFile and helper functions to .cpp

tempestpy_adaptions
gereon 12 years ago
parent
bb1dae23fc
commit
9156fa6d61
2 changed files with 132 additions and 105 deletions
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  1. 128
      src/parser/parser.cpp
  2. 109
      src/parser/parser.h

128
src/parser/parser.cpp
View File

@ -0,0 +1,128 @@
#include "src/parser/parser.h"
#if defined LINUX || defined MACOSX
#include <sys/mman.h>
#elif defined WINDOWS
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <iostream>
#include <pantheios/pantheios.hpp>
#include "src/exceptions/file_IO_exception.h"
#include "src/exceptions/wrong_file_format.h"
/*!
* Calls strtol() internally and checks if the new pointer is different
* from the original one, i.e. if str != *end. If they are the same, a
* mrmc::exceptions::wrong_file_format will be thrown.
* @param str String to parse
* @param end New pointer will be written there
* @return Result of strtol()
*/
uint_fast64_t mrmc::parser::checked_strtol(const char* str, char** end)
{
uint_fast64_t res = strtol(str, end, 10);
if (str == *end) throw mrmc::exceptions::wrong_file_format();
return res;
}
/*!
* Skips spaces, tabs, newlines and carriage returns. Returns pointer
* to first char that is not a whitespace.
* @param buf String buffer
* @return pointer to first non-whitespace character
*/
char* mrmc::parser::skipWS(char* buf)
{
while ((*buf == ' ') || (*buf == '\t') || (*buf == '\n') || (*buf == '\r')) buf++;
return buf;
}
/*!
* Will stat the given file, open it and map it to memory.
* If anything of this fails, an appropriate exception is raised
* and a log entry is written.
* @param filename file to be opened
*/
mrmc::parser::MappedFile::MappedFile(const char* filename)
{
#if defined LINUX || defined MACOSX
/*
* Do file mapping for reasonable systems.
* stat64(), open(), mmap()
*/
if (stat64(filename, &(this->st)) != 0)
{
pantheios::log_ERROR("Could not stat ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in stat()");
}
this->file = open(filename, O_RDONLY);
if (this->file < 0)
{
pantheios::log_ERROR("Could not open ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in open()");
}
this->data = (char*) mmap(NULL, this->st.st_size, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, this->file, 0);
if (this->data == (char*)-1)
{
close(this->file);
pantheios::log_ERROR("Could not mmap ", filename, ".");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in mmap()");
}
this->dataend = this->data + this->st.st_size;
#elif defined WINDOWS
/*
* Do file mapping for windows.
* _stat64(), CreateFile(), CreateFileMapping(), MapViewOfFile()
*/
if (_stat64(filename, &(this->st)) != 0)
{
pantheios::log_ERROR("Could not stat ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in stat()");
}
this->file = CreateFileA(filename, GENERIC_READ, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (this->file == INVALID_HANDLE_VALUE)
{
pantheios::log_ERROR("Could not open ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in CreateFile()");
}
this->mapping = CreateFileMappingA(this->file, NULL, PAGE_READONLY, (DWORD)(st.st_size >> 32), (DWORD)st.st_size, NULL);
if (this->mapping == NULL)
{
CloseHandle(this->file);
pantheios::log_ERROR("Could not create file mapping for ", filename, ".");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in CreateFileMapping()");
}
this->data = static_cast<char*>(MapViewOfFile(this->mapping, FILE_MAP_READ, 0, 0, this->st.st_size));
if (this->data == NULL)
{
CloseHandle(this->mapping);
CloseHandle(this->file);
pantheios::log_ERROR("Could not create file map view for ", filename, ".");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in MapViewOfFile()");
}
this->dataend = this->data + this->st.st_size;
#endif
}
/*!
* Will unmap the data and close the file.
*/
mrmc::parser::MappedFile::~MappedFile()
{
#if defined LINUX || defined MACOSX
munmap(this->data, this->st.st_size);
close(this->file);
#elif defined WINDOWS
CloseHandle(this->mapping);
CloseHandle(this->file);
#endif
}

109
src/parser/parser.h
View File

@ -29,34 +29,13 @@ namespace parser {
/*! /*!
* @brief Parses integer and checks, if something has been parsed. * @brief Parses integer and checks, if something has been parsed.
*
* Calls strtol() internally and checks if the new pointer is different
* from the original one, i.e. if str != *end. If they are the same, a
* mrmc::exceptions::wrong_file_format will be thrown.
* @param str String to parse
* @param end New pointer will be written there
* @return Result of strtol()
*/ */
inline uint_fast64_t checked_strtol(const char* str, char** end)
{
uint_fast64_t res = strtol(str, end, 10);
if (str == *end) throw mrmc::exceptions::wrong_file_format();
return res;
}
uint_fast64_t checked_strtol(const char* str, char** end);
/*! /*!
* @brief Skips common whitespaces in a string. * @brief Skips common whitespaces in a string.
*
* Skips spaces, tabs, newlines and carriage returns. Returns pointer
* to first char that is not a whitespace.
* @param buf String buffer
* @return pointer to first non-whitespace character
*/ */
inline char* skipWS(char* buf)
{
while ((*buf == ' ') || (*buf == '\t') || (*buf == '\n') || (*buf == '\r')) buf++;
return buf;
}
char* skipWS(char* buf);
/*! /*!
* @brief Opens a file and maps it to memory providing a char* * @brief Opens a file and maps it to memory providing a char*
@ -108,93 +87,13 @@ namespace parser {
/*! /*!
* @brief Constructor of MappedFile. * @brief Constructor of MappedFile.
*
* Will stat the given file, open it and map it to memory.
* If anything of this fails, an appropriate exception is raised
* and a log entry is written.
* @param filename file to be opened
*/
MappedFile(const char* filename)
{
#if defined LINUX || defined MACOSX
/*
* Do file mapping for reasonable systems.
* stat64(), open(), mmap()
*/
if (stat64(filename, &(this->st)) != 0)
{
pantheios::log_ERROR("Could not stat ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in stat()");
}
this->file = open(filename, O_RDONLY);
if (this->file < 0)
{
pantheios::log_ERROR("Could not open ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in open()");
}
this->data = (char*) mmap(NULL, this->st.st_size, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, this->file, 0);
if (this->data == (char*)-1)
{
close(this->file);
pantheios::log_ERROR("Could not mmap ", filename, ".");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in mmap()");
}
this->dataend = this->data + this->st.st_size;
#elif defined WINDOWS
/*
* Do file mapping for windows.
* _stat64(), CreateFile(), CreateFileMapping(), MapViewOfFile()
*/ */
if (_stat64(filename, &(this->st)) != 0)
{
pantheios::log_ERROR("Could not stat ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in stat()");
}
this->file = CreateFileA(filename, GENERIC_READ, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (this->file == INVALID_HANDLE_VALUE)
{
pantheios::log_ERROR("Could not open ", filename, ". Does it exist? Is it readable?");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in CreateFile()");
}
this->mapping = CreateFileMappingA(this->file, NULL, PAGE_READONLY, (DWORD)(st.st_size >> 32), (DWORD)st.st_size, NULL);
if (this->mapping == NULL)
{
CloseHandle(this->file);
pantheios::log_ERROR("Could not create file mapping for ", filename, ".");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in CreateFileMapping()");
}
this->data = static_cast<char*>(MapViewOfFile(this->mapping, FILE_MAP_READ, 0, 0, this->st.st_size));
if (this->data == NULL)
{
CloseHandle(this->mapping);
CloseHandle(this->file);
pantheios::log_ERROR("Could not create file map view for ", filename, ".");
throw exceptions::file_IO_exception("mrmc::parser::MappedFile Error in MapViewOfFile()");
}
this->dataend = this->data + this->st.st_size;
#endif
}
MappedFile(const char* filename);
/*! /*!
* @brief Destructor of MappedFile. * @brief Destructor of MappedFile.
*
* Will unmap the data and close the file.
*/ */
~MappedFile()
{
#if defined LINUX || defined MACOSX
munmap(this->data, this->st.st_size);
close(this->file);
#elif defined WINDOWS
CloseHandle(this->mapping);
CloseHandle(this->file);
#endif
}
~MappedFile();
}; };
} // namespace parser } // namespace parser

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