/usr/include/osmium/util/file.hpp is in libosmium2-dev 2.13.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#define OSMIUM_UTIL_FILE_HPP
/*
This file is part of Osmium (http://osmcode.org/libosmium).
Copyright 2013-2017 Jochen Topf <jochen@topf.org> and others (see README).
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#include <cerrno>
#include <cstddef>
#include <cstdio>
#include <string>
#include <system_error>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef _WIN32
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN // Prevent winsock.h inclusion; avoid winsock2.h conflict
# endif
# include <io.h>
# include <windows.h>
# include <crtdbg.h>
#endif
#ifndef _MSC_VER
# include <unistd.h>
#endif
#include <osmium/util/cast.hpp>
namespace osmium {
namespace util {
#ifdef _MSC_VER
namespace detail {
// Disable parameter validation on Windows and reenable it
// automatically when scope closes.
// https://docs.microsoft.com/en-us/cpp/c-runtime-library/parameter-validation
class disable_invalid_parameter_handler {
static void invalid_parameter_handler(
const wchar_t* expression,
const wchar_t* function,
const wchar_t* file,
unsigned int line,
uintptr_t pReserved
) {
// do nothing
}
_invalid_parameter_handler old_handler;
int old_report_mode;
public:
disable_invalid_parameter_handler() :
old_handler(_set_thread_local_invalid_parameter_handler(invalid_parameter_handler)),
old_report_mode(_CrtSetReportMode(_CRT_ASSERT, 0)) {
}
~disable_invalid_parameter_handler() {
_CrtSetReportMode(_CRT_ASSERT, old_report_mode);
_set_thread_local_invalid_parameter_handler(old_handler);
}
}; // class disable_invalid_parameter_handler
}
#endif
/**
* Get file size.
* This is a small wrapper around a system call.
*
* @param fd File descriptor
* @returns file size
* @throws std::system_error If system call failed
*/
inline std::size_t file_size(int fd) {
#ifdef _MSC_VER
// Windows implementation
detail::disable_invalid_parameter_handler diph;
// https://msdn.microsoft.com/en-us/library/dfbc2kec.aspx
const auto size = ::_filelengthi64(fd);
if (size < 0) {
throw std::system_error{errno, std::system_category(), "Could not get file size"};
}
return static_cast<std::size_t>(size);
#else
// Unix implementation
struct stat s;
if (::fstat(fd, &s) != 0) {
throw std::system_error{errno, std::system_category(), "Could not get file size"};
}
return static_cast<std::size_t>(s.st_size);
#endif
}
/**
* Get file size.
* This is a small wrapper around a system call.
*
* @param name File name
* @returns file size
* @throws std::system_error If system call failed
* @pre name must not be nullptr
*/
inline std::size_t file_size(const char* name) {
#ifdef _MSC_VER
// Windows implementation
// https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx
struct _stat64 s;
if (::_stati64(name, &s) != 0) {
throw std::system_error{errno, std::system_category(), std::string{"Could not get file size of file '"} + name + "'"};
}
#else
// Unix implementation
struct stat s;
if (::stat(name, &s) != 0) {
throw std::system_error{errno, std::system_category(), std::string{"Could not get file size of file '"} + name + "'"};
}
#endif
return static_cast<std::size_t>(s.st_size);
}
/**
* Get file size.
* This is a small wrapper around a system call.
*
* @param name File name
* @returns file size
* @throws std::system_error If system call failed
*/
inline std::size_t file_size(const std::string& name) {
return file_size(name.c_str());
}
/**
* Resize file.
* Small wrapper around ftruncate(2) system call.
*
* @param fd File descriptor
* @param new_size New size
* @throws std::system_error If ftruncate(2) call failed
*/
inline void resize_file(int fd, std::size_t new_size) {
#ifdef _WIN32
detail::disable_invalid_parameter_handler diph;
// https://msdn.microsoft.com/en-us/library/whx354w1.aspx
if (::_chsize_s(fd, static_cast_with_assert<__int64>(new_size)) != 0) {
#else
if (::ftruncate(fd, static_cast_with_assert<off_t>(new_size)) != 0) {
#endif
throw std::system_error{errno, std::system_category(), "Could not resize file"};
}
}
/**
* Get the page size for this system.
*/
inline std::size_t get_pagesize() {
#ifdef _WIN32
// Windows implementation
SYSTEM_INFO si;
GetSystemInfo(&si);
return si.dwPageSize;
#else
// Unix implementation
return static_cast<std::size_t>(::sysconf(_SC_PAGESIZE));
#endif
}
/**
* Get current offset into file.
*
* @param fd Open file descriptor.
* @returns File offset or 0 if it is not available.
*/
inline std::size_t file_offset(int fd) {
#ifdef _MSC_VER
detail::disable_invalid_parameter_handler diph;
// https://msdn.microsoft.com/en-us/library/1yee101t.aspx
const auto offset = _lseeki64(fd, 0, SEEK_CUR);
#else
const auto offset = ::lseek(fd, 0, SEEK_CUR);
#endif
if (offset == -1) {
return 0;
}
return static_cast<std::size_t>(offset);
}
/**
* Check whether the file descriptor refers to a TTY.
*/
inline bool isatty(int fd) {
#ifdef _MSC_VER
detail::disable_invalid_parameter_handler diph;
// https://msdn.microsoft.com/en-us/library/f4s0ddew.aspx
return _isatty(fd) != 0;
#else
return ::isatty(fd) != 0;
#endif
}
} // namespace util
} // namespace osmium
#endif // OSMIUM_UTIL_FILE_HPP
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