sp
/
tempest
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

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
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  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.
*
* 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.
*
* 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*
@ -108,93 +87,13 @@ namespace parser {
/*!
* @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.
*
* 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

Write Preview
Loading…
Cancel
Save