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// boost/filesystem/operations.hpp ---------------------------------------------------//
// Copyright Beman Dawes 2002-2009
// Copyright Jan Langer 2002
// Copyright Dietmar Kuehl 2001
// Copyright Vladimir Prus 2002
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
// Library home page: http://www.boost.org/libs/filesystem
//--------------------------------------------------------------------------------------//
#ifndef BOOST_FILESYSTEM3_OPERATIONS_HPP
#define BOOST_FILESYSTEM3_OPERATIONS_HPP
#include <boost/config.hpp>
# if defined( BOOST_NO_STD_WSTRING )
# error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
# endif
#include <boost/filesystem/config.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/detail/scoped_enum_emulation.hpp>
#include <boost/detail/bitmask.hpp>
#include <boost/system/error_code.hpp>
#include <boost/system/system_error.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/cstdint.hpp>
#include <boost/range/mutable_iterator.hpp>
#include <boost/range/const_iterator.hpp>
#include <boost/assert.hpp>
#include <string>
#include <utility> // for pair
#include <ctime>
#include <vector>
#include <stack>
#ifdef BOOST_WINDOWS_API
# include <fstream>
#endif
#include <boost/config/abi_prefix.hpp> // must be the last #include
//--------------------------------------------------------------------------------------//
namespace boost
{
namespace filesystem
{
//--------------------------------------------------------------------------------------//
// //
// class filesystem_error //
// //
//--------------------------------------------------------------------------------------//
class BOOST_SYMBOL_VISIBLE filesystem_error : public system::system_error
{
// see http://www.boost.org/more/error_handling.html for design rationale
// all functions are inline to avoid issues with crossing dll boundaries
// functions previously throw() are now BOOST_NOEXCEPT_OR_NOTHROW
// functions previously without throw() are now BOOST_NOEXCEPT
public:
// compiler generates copy constructor and copy assignment
filesystem_error(
const std::string & what_arg, system::error_code ec) BOOST_NOEXCEPT
: system::system_error(ec, what_arg)
{
try
{
m_imp_ptr.reset(new m_imp);
}
catch (...) { m_imp_ptr.reset(); }
}
filesystem_error(
const std::string & what_arg, const path& path1_arg,
system::error_code ec) BOOST_NOEXCEPT
: system::system_error(ec, what_arg)
{
try
{
m_imp_ptr.reset(new m_imp);
m_imp_ptr->m_path1 = path1_arg;
}
catch (...) { m_imp_ptr.reset(); }
}
filesystem_error(
const std::string & what_arg, const path& path1_arg,
const path& path2_arg, system::error_code ec) BOOST_NOEXCEPT
: system::system_error(ec, what_arg)
{
try
{
m_imp_ptr.reset(new m_imp);
m_imp_ptr->m_path1 = path1_arg;
m_imp_ptr->m_path2 = path2_arg;
}
catch (...) { m_imp_ptr.reset(); }
}
~filesystem_error() BOOST_NOEXCEPT_OR_NOTHROW{}
const path& path1() const BOOST_NOEXCEPT
{
static const path empty_path;
return m_imp_ptr.get() ? m_imp_ptr->m_path1 : empty_path;
}
const path& path2() const BOOST_NOEXCEPT
{
static const path empty_path;
return m_imp_ptr.get() ? m_imp_ptr->m_path2 : empty_path;
}
const char* what() const BOOST_NOEXCEPT_OR_NOTHROW
{
if (!m_imp_ptr.get())
return system::system_error::what();
try
{
if (m_imp_ptr->m_what.empty())
{
m_imp_ptr->m_what = system::system_error::what();
if (!m_imp_ptr->m_path1.empty())
{
m_imp_ptr->m_what += ": \"";
m_imp_ptr->m_what += m_imp_ptr->m_path1.string();
m_imp_ptr->m_what += "\"";
}
if (!m_imp_ptr->m_path2.empty())
{
m_imp_ptr->m_what += ", \"";
m_imp_ptr->m_what += m_imp_ptr->m_path2.string();
m_imp_ptr->m_what += "\"";
}
}
return m_imp_ptr->m_what.c_str();
}
catch (...)
{
return system::system_error::what();
}
}
private:
struct m_imp
{
path m_path1; // may be empty()
path m_path2; // may be empty()
std::string m_what; // not built until needed
};
boost::shared_ptr<m_imp> m_imp_ptr;
};
//--------------------------------------------------------------------------------------//
// file_type //
//--------------------------------------------------------------------------------------//
enum file_type
{
status_error,
# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
status_unknown = status_error,
# endif
file_not_found,
regular_file,
directory_file,
// the following may not apply to some operating systems or file systems
symlink_file,
block_file,
character_file,
fifo_file,
socket_file,
reparse_file, // Windows: FILE_ATTRIBUTE_REPARSE_POINT that is not a symlink
type_unknown, // file does exist, but isn't one of the above types or
// we don't have strong enough permission to find its type
_detail_directory_symlink // internal use only; never exposed to users
};
//--------------------------------------------------------------------------------------//
// perms //
//--------------------------------------------------------------------------------------//
enum perms
{
no_perms = 0, // file_not_found is no_perms rather than perms_not_known
// POSIX equivalent macros given in comments.
// Values are from POSIX and are given in octal per the POSIX standard.
// permission bits
owner_read = 0400, // S_IRUSR, Read permission, owner
owner_write = 0200, // S_IWUSR, Write permission, owner
owner_exe = 0100, // S_IXUSR, Execute/search permission, owner
owner_all = 0700, // S_IRWXU, Read, write, execute/search by owner
group_read = 040, // S_IRGRP, Read permission, group
group_write = 020, // S_IWGRP, Write permission, group
group_exe = 010, // S_IXGRP, Execute/search permission, group
group_all = 070, // S_IRWXG, Read, write, execute/search by group
others_read = 04, // S_IROTH, Read permission, others
others_write = 02, // S_IWOTH, Write permission, others
others_exe = 01, // S_IXOTH, Execute/search permission, others
others_all = 07, // S_IRWXO, Read, write, execute/search by others
all_all = 0777, // owner_all|group_all|others_all
// other POSIX bits
set_uid_on_exe = 04000, // S_ISUID, Set-user-ID on execution
set_gid_on_exe = 02000, // S_ISGID, Set-group-ID on execution
sticky_bit = 01000, // S_ISVTX,
// (POSIX XSI) On directories, restricted deletion flag
// (V7) 'sticky bit': save swapped text even after use
// (SunOS) On non-directories: don't cache this file
// (SVID-v4.2) On directories: restricted deletion flag
// Also see http://en.wikipedia.org/wiki/Sticky_bit
perms_mask = 07777, // all_all|set_uid_on_exe|set_gid_on_exe|sticky_bit
perms_not_known = 0xFFFF, // present when directory_entry cache not loaded
// options for permissions() function
add_perms = 0x1000, // adds the given permission bits to the current bits
remove_perms = 0x2000, // removes the given permission bits from the current bits;
// choose add_perms or remove_perms, not both; if neither add_perms
// nor remove_perms is given, replace the current bits with
// the given bits.
symlink_perms = 0x4000 // on POSIX, don't resolve symlinks; implied on Windows
};
BOOST_BITMASK(perms)
//--------------------------------------------------------------------------------------//
// file_status //
//--------------------------------------------------------------------------------------//
class BOOST_FILESYSTEM_DECL file_status
{
public:
file_status() BOOST_NOEXCEPT
: m_value(status_error), m_perms(perms_not_known) {}
explicit file_status(file_type v) BOOST_NOEXCEPT
: m_value(v), m_perms(perms_not_known) {}
file_status(file_type v, perms prms) BOOST_NOEXCEPT
: m_value(v), m_perms(prms) {}
// As of October 2015 the interaction between noexcept and =default is so troublesome
// for VC++, GCC, and probably other compilers, that =default is not used with noexcept
// functions. GCC is not even consistent for the same release on different platforms.
file_status(const file_status& rhs) BOOST_NOEXCEPT
: m_value(rhs.m_value), m_perms(rhs.m_perms) {}
file_status& operator=(const file_status& rhs) BOOST_NOEXCEPT
{
m_value = rhs.m_value;
m_perms = rhs.m_perms;
return *this;
}
# if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
file_status(file_status&& rhs) BOOST_NOEXCEPT
{
m_value = std::move(rhs.m_value);
m_perms = std::move(rhs.m_perms);
}
file_status& operator=(file_status&& rhs) BOOST_NOEXCEPT
{
m_value = std::move(rhs.m_value);
m_perms = std::move(rhs.m_perms);
return *this;
}
# endif
// observers
file_type type() const BOOST_NOEXCEPT { return m_value; }
perms permissions() const BOOST_NOEXCEPT { return m_perms; }
// modifiers
void type(file_type v) BOOST_NOEXCEPT { m_value = v; }
void permissions(perms prms) BOOST_NOEXCEPT { m_perms = prms; }
bool operator==(const file_status& rhs) const BOOST_NOEXCEPT
{ return type() == rhs.type() &&
permissions() == rhs.permissions(); }
bool operator!=(const file_status& rhs) const BOOST_NOEXCEPT
{ return !(*this == rhs); }
private:
file_type m_value;
enum perms m_perms;
};
inline bool type_present(file_status f) BOOST_NOEXCEPT
{ return f.type() != status_error; }
inline bool permissions_present(file_status f) BOOST_NOEXCEPT
{return f.permissions() != perms_not_known;}
inline bool status_known(file_status f) BOOST_NOEXCEPT
{ return type_present(f) && permissions_present(f); }
inline bool exists(file_status f) BOOST_NOEXCEPT
{ return f.type() != status_error
&& f.type() != file_not_found; }
inline bool is_regular_file(file_status f) BOOST_NOEXCEPT
{ return f.type() == regular_file; }
inline bool is_directory(file_status f) BOOST_NOEXCEPT
{ return f.type() == directory_file; }
inline bool is_symlink(file_status f) BOOST_NOEXCEPT
{ return f.type() == symlink_file; }
inline bool is_other(file_status f) BOOST_NOEXCEPT
{ return exists(f) && !is_regular_file(f)
&& !is_directory(f) && !is_symlink(f); }
# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
inline bool is_regular(file_status f) BOOST_NOEXCEPT { return f.type() == regular_file; }
# endif
struct space_info
{
// all values are byte counts
boost::uintmax_t capacity;
boost::uintmax_t free; // <= capacity
boost::uintmax_t available; // <= free
};
BOOST_SCOPED_ENUM_START(copy_option)
{none=0, fail_if_exists = none, overwrite_if_exists};
BOOST_SCOPED_ENUM_END
//--------------------------------------------------------------------------------------//
// implementation details //
//--------------------------------------------------------------------------------------//
namespace detail
{
// We cannot pass a BOOST_SCOPED_ENUM to a compled function because it will result
// in an undefined reference if the library is compled with -std=c++0x but the use
// is compiled in C++03 mode, or visa versa. See tickets 6124, 6779, 10038.
enum copy_option {none=0, fail_if_exists = none, overwrite_if_exists};
BOOST_FILESYSTEM_DECL
file_status status(const path&p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
file_status symlink_status(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
bool is_empty(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path initial_path(system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path canonical(const path& p, const path& base, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void copy(const path& from, const path& to, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void copy_directory(const path& from, const path& to, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void copy_file(const path& from, const path& to, // See ticket #2925
detail::copy_option option, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void copy_symlink(const path& existing_symlink, const path& new_symlink, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
bool create_directories(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
bool create_directory(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void create_directory_symlink(const path& to, const path& from,
system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void create_hard_link(const path& to, const path& from, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void create_symlink(const path& to, const path& from, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path current_path(system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void current_path(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
bool equivalent(const path& p1, const path& p2, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
boost::uintmax_t file_size(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
boost::uintmax_t hard_link_count(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
std::time_t last_write_time(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void last_write_time(const path& p, const std::time_t new_time,
system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void permissions(const path& p, perms prms, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path read_symlink(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path relative(const path& p, const path& base, system::error_code* ec = 0);
BOOST_FILESYSTEM_DECL
bool remove(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
boost::uintmax_t remove_all(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void rename(const path& old_p, const path& new_p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
void resize_file(const path& p, uintmax_t size, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
space_info space(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path system_complete(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path temp_directory_path(system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path unique_path(const path& p, system::error_code* ec=0);
BOOST_FILESYSTEM_DECL
path weakly_canonical(const path& p, system::error_code* ec = 0);
} // namespace detail
//--------------------------------------------------------------------------------------//
// //
// status query functions //
// //
//--------------------------------------------------------------------------------------//
inline
file_status status(const path& p) {return detail::status(p);}
inline
file_status status(const path& p, system::error_code& ec)
{return detail::status(p, &ec);}
inline
file_status symlink_status(const path& p) {return detail::symlink_status(p);}
inline
file_status symlink_status(const path& p, system::error_code& ec)
{return detail::symlink_status(p, &ec);}
inline
bool exists(const path& p) {return exists(detail::status(p));}
inline
bool exists(const path& p, system::error_code& ec)
{return exists(detail::status(p, &ec));}
inline
bool is_directory(const path& p) {return is_directory(detail::status(p));}
inline
bool is_directory(const path& p, system::error_code& ec)
{return is_directory(detail::status(p, &ec));}
inline
bool is_regular_file(const path& p) {return is_regular_file(detail::status(p));}
inline
bool is_regular_file(const path& p, system::error_code& ec)
{return is_regular_file(detail::status(p, &ec));}
inline
bool is_other(const path& p) {return is_other(detail::status(p));}
inline
bool is_other(const path& p, system::error_code& ec)
{return is_other(detail::status(p, &ec));}
inline
bool is_symlink(const path& p) {return is_symlink(detail::symlink_status(p));}
inline
bool is_symlink(const path& p, system::error_code& ec)
{return is_symlink(detail::symlink_status(p, &ec));}
# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
inline
bool is_regular(const path& p) {return is_regular(detail::status(p));}
inline
bool is_regular(const path& p, system::error_code& ec)
{return is_regular(detail::status(p, &ec));}
# endif
inline
bool is_empty(const path& p) {return detail::is_empty(p);}
inline
bool is_empty(const path& p, system::error_code& ec)
{return detail::is_empty(p, &ec);}
//--------------------------------------------------------------------------------------//
// //
// operational functions //
// in alphabetical order, unless otherwise noted //
// //
//--------------------------------------------------------------------------------------//
// forward declarations
path current_path(); // fwd declaration
path initial_path();
BOOST_FILESYSTEM_DECL
path absolute(const path& p, const path& base=current_path());
// If base.is_absolute(), throws nothing. Thus no need for ec argument
inline
path canonical(const path& p, const path& base=current_path())
{return detail::canonical(p, base);}
inline
path canonical(const path& p, system::error_code& ec)
{return detail::canonical(p, current_path(), &ec);}
inline
path canonical(const path& p, const path& base, system::error_code& ec)
{return detail::canonical(p, base, &ec);}
# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
inline
path complete(const path& p)
{
return absolute(p, initial_path());
}
inline
path complete(const path& p, const path& base)
{
return absolute(p, base);
}
# endif
inline
void copy(const path& from, const path& to) {detail::copy(from, to);}
inline
void copy(const path& from, const path& to, system::error_code& ec) BOOST_NOEXCEPT
{detail::copy(from, to, &ec);}
inline
void copy_directory(const path& from, const path& to)
{detail::copy_directory(from, to);}
inline
void copy_directory(const path& from, const path& to, system::error_code& ec) BOOST_NOEXCEPT
{detail::copy_directory(from, to, &ec);}
inline
void copy_file(const path& from, const path& to, // See ticket #2925
BOOST_SCOPED_ENUM(copy_option) option)
{
detail::copy_file(from, to, static_cast<detail::copy_option>(option));
}
inline
void copy_file(const path& from, const path& to)
{
detail::copy_file(from, to, detail::fail_if_exists);
}
inline
void copy_file(const path& from, const path& to, // See ticket #2925
BOOST_SCOPED_ENUM(copy_option) option, system::error_code& ec) BOOST_NOEXCEPT
{
detail::copy_file(from, to, static_cast<detail::copy_option>(option), &ec);
}
inline
void copy_file(const path& from, const path& to, system::error_code& ec) BOOST_NOEXCEPT
{
detail::copy_file(from, to, detail::fail_if_exists, &ec);
}
inline
void copy_symlink(const path& existing_symlink,
const path& new_symlink) {detail::copy_symlink(existing_symlink, new_symlink);}
inline
void copy_symlink(const path& existing_symlink, const path& new_symlink,
system::error_code& ec) BOOST_NOEXCEPT
{detail::copy_symlink(existing_symlink, new_symlink, &ec);}
inline
bool create_directories(const path& p) {return detail::create_directories(p);}
inline
bool create_directories(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::create_directories(p, &ec);}
inline
bool create_directory(const path& p) {return detail::create_directory(p);}
inline
bool create_directory(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::create_directory(p, &ec);}
inline
void create_directory_symlink(const path& to, const path& from)
{detail::create_directory_symlink(to, from);}
inline
void create_directory_symlink(const path& to, const path& from, system::error_code& ec) BOOST_NOEXCEPT
{detail::create_directory_symlink(to, from, &ec);}
inline
void create_hard_link(const path& to, const path& new_hard_link) {detail::create_hard_link(to, new_hard_link);}
inline
void create_hard_link(const path& to, const path& new_hard_link, system::error_code& ec) BOOST_NOEXCEPT
{detail::create_hard_link(to, new_hard_link, &ec);}
inline
void create_symlink(const path& to, const path& new_symlink) {detail::create_symlink(to, new_symlink);}
inline
void create_symlink(const path& to, const path& new_symlink, system::error_code& ec) BOOST_NOEXCEPT
{detail::create_symlink(to, new_symlink, &ec);}
inline
path current_path() {return detail::current_path();}
inline
path current_path(system::error_code& ec) BOOST_NOEXCEPT {return detail::current_path(&ec);}
inline
void current_path(const path& p) {detail::current_path(p);}
inline
void current_path(const path& p, system::error_code& ec) BOOST_NOEXCEPT {detail::current_path(p, &ec);}
inline
bool equivalent(const path& p1, const path& p2) {return detail::equivalent(p1, p2);}
inline
bool equivalent(const path& p1, const path& p2, system::error_code& ec) BOOST_NOEXCEPT
{return detail::equivalent(p1, p2, &ec);}
inline
boost::uintmax_t file_size(const path& p) {return detail::file_size(p);}
inline
boost::uintmax_t file_size(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::file_size(p, &ec);}
inline
boost::uintmax_t hard_link_count(const path& p) {return detail::hard_link_count(p);}
inline
boost::uintmax_t hard_link_count(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::hard_link_count(p, &ec);}
inline
path initial_path() {return detail::initial_path();}
inline
path initial_path(system::error_code& ec) {return detail::initial_path(&ec);}
template <class Path>
path initial_path() {return initial_path();}
template <class Path>
path initial_path(system::error_code& ec) {return detail::initial_path(&ec);}
inline
std::time_t last_write_time(const path& p) {return detail::last_write_time(p);}
inline
std::time_t last_write_time(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::last_write_time(p, &ec);}
inline
void last_write_time(const path& p, const std::time_t new_time)
{detail::last_write_time(p, new_time);}
inline
void last_write_time(const path& p, const std::time_t new_time,
system::error_code& ec) BOOST_NOEXCEPT
{detail::last_write_time(p, new_time, &ec);}
inline
void permissions(const path& p, perms prms)
{detail::permissions(p, prms);}
inline
void permissions(const path& p, perms prms, system::error_code& ec) BOOST_NOEXCEPT
{detail::permissions(p, prms, &ec);}
inline
path read_symlink(const path& p) {return detail::read_symlink(p);}
inline
path read_symlink(const path& p, system::error_code& ec)
{return detail::read_symlink(p, &ec);}
inline
// For standardization, if the committee doesn't like "remove", consider "eliminate"
bool remove(const path& p) {return detail::remove(p);}
inline
bool remove(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::remove(p, &ec);}
inline
boost::uintmax_t remove_all(const path& p) {return detail::remove_all(p);}
inline
boost::uintmax_t remove_all(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::remove_all(p, &ec);}
inline
void rename(const path& old_p, const path& new_p) {detail::rename(old_p, new_p);}
inline
void rename(const path& old_p, const path& new_p, system::error_code& ec) BOOST_NOEXCEPT
{detail::rename(old_p, new_p, &ec);}
inline // name suggested by Scott McMurray
void resize_file(const path& p, uintmax_t size) {detail::resize_file(p, size);}
inline
void resize_file(const path& p, uintmax_t size, system::error_code& ec) BOOST_NOEXCEPT
{detail::resize_file(p, size, &ec);}
inline
path relative(const path& p, const path& base=current_path())
{return detail::relative(p, base);}
inline
path relative(const path& p, system::error_code& ec)
{return detail::relative(p, current_path(), &ec);}
inline
path relative(const path& p, const path& base, system::error_code& ec)
{return detail::relative(p, base, &ec);}
inline
space_info space(const path& p) {return detail::space(p);}
inline
space_info space(const path& p, system::error_code& ec) BOOST_NOEXCEPT
{return detail::space(p, &ec);}
# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
inline bool symbolic_link_exists(const path& p)
{ return is_symlink(symlink_status(p)); }
# endif
inline
path system_complete(const path& p) {return detail::system_complete(p);}
inline
path system_complete(const path& p, system::error_code& ec)
{return detail::system_complete(p, &ec);}
inline
path temp_directory_path() {return detail::temp_directory_path();}
inline
path temp_directory_path(system::error_code& ec)
{return detail::temp_directory_path(&ec);}
inline
path unique_path(const path& p="%%%%-%%%%-%%%%-%%%%")
{return detail::unique_path(p);}
inline
path unique_path(const path& p, system::error_code& ec)
{return detail::unique_path(p, &ec);}
inline
path weakly_canonical(const path& p) {return detail::weakly_canonical(p);}
inline
path weakly_canonical(const path& p, system::error_code& ec)
{return detail::weakly_canonical(p, &ec);}
//--------------------------------------------------------------------------------------//
// //
// directory_entry //
// //
//--------------------------------------------------------------------------------------//
// GCC has a problem with a member function named path within a namespace or
// sub-namespace that also has a class named path. The workaround is to always
// fully qualify the name path when it refers to the class name.
class BOOST_FILESYSTEM_DECL directory_entry
{
public:
typedef boost::filesystem::path::value_type value_type; // enables class path ctor taking directory_entry
directory_entry() BOOST_NOEXCEPT {}
explicit directory_entry(const boost::filesystem::path& p)
: m_path(p), m_status(file_status()), m_symlink_status(file_status())
{}
directory_entry(const boost::filesystem::path& p,
file_status st, file_status symlink_st = file_status())
: m_path(p), m_status(st), m_symlink_status(symlink_st) {}
directory_entry(const directory_entry& rhs)
: m_path(rhs.m_path), m_status(rhs.m_status), m_symlink_status(rhs.m_symlink_status){}
directory_entry& operator=(const directory_entry& rhs)
{
m_path = rhs.m_path;
m_status = rhs.m_status;
m_symlink_status = rhs.m_symlink_status;
return *this;
}
// As of October 2015 the interaction between noexcept and =default is so troublesome
// for VC++, GCC, and probably other compilers, that =default is not used with noexcept
// functions. GCC is not even consistent for the same release on different platforms.
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
directory_entry(directory_entry&& rhs) BOOST_NOEXCEPT
{
m_path = std::move(rhs.m_path);
m_status = std::move(rhs.m_status);
m_symlink_status = std::move(rhs.m_symlink_status);
}
directory_entry& operator=(directory_entry&& rhs) BOOST_NOEXCEPT
{
m_path = std::move(rhs.m_path);
m_status = std::move(rhs.m_status);
m_symlink_status = std::move(rhs.m_symlink_status);
return *this;
}
#endif
void assign(const boost::filesystem::path& p,
file_status st = file_status(), file_status symlink_st = file_status())
{ m_path = p; m_status = st; m_symlink_status = symlink_st; }
void replace_filename(const boost::filesystem::path& p,
file_status st = file_status(), file_status symlink_st = file_status())
{
m_path.remove_filename();
m_path /= p;
m_status = st;
m_symlink_status = symlink_st;
}
# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
void replace_leaf(const boost::filesystem::path& p,
file_status st, file_status symlink_st)
{ replace_filename(p, st, symlink_st); }
# endif
const boost::filesystem::path& path() const BOOST_NOEXCEPT {return m_path;}
operator const boost::filesystem::path&() const BOOST_NOEXCEPT
{return m_path;}
file_status status() const {return m_get_status();}
file_status status(system::error_code& ec) const BOOST_NOEXCEPT
{return m_get_status(&ec); }
file_status symlink_status() const {return m_get_symlink_status();}
file_status symlink_status(system::error_code& ec) const BOOST_NOEXCEPT
{return m_get_symlink_status(&ec); }
bool operator==(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path == rhs.m_path; }
bool operator!=(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path != rhs.m_path;}
bool operator< (const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path < rhs.m_path;}
bool operator<=(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path <= rhs.m_path;}
bool operator> (const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path > rhs.m_path;}
bool operator>=(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path >= rhs.m_path;}
private:
boost::filesystem::path m_path;
mutable file_status m_status; // stat()-like
mutable file_status m_symlink_status; // lstat()-like
file_status m_get_status(system::error_code* ec=0) const;
file_status m_get_symlink_status(system::error_code* ec=0) const;
}; // directory_entry
//--------------------------------------------------------------------------------------//
// //
// directory_iterator helpers //
// //
//--------------------------------------------------------------------------------------//
class directory_iterator;
namespace detail
{
BOOST_FILESYSTEM_DECL
system::error_code dir_itr_close(// never throws()
void *& handle
# if defined(BOOST_POSIX_API)
, void *& buffer
# endif
);
struct dir_itr_imp
{
directory_entry dir_entry;
void* handle;
# ifdef BOOST_POSIX_API
void* buffer; // see dir_itr_increment implementation
# endif
dir_itr_imp() : handle(0)
# ifdef BOOST_POSIX_API
, buffer(0)
# endif
{}
~dir_itr_imp() // never throws
{
dir_itr_close(handle
# if defined(BOOST_POSIX_API)
, buffer
# endif
);
}
};
// see path::iterator: comment below
BOOST_FILESYSTEM_DECL void directory_iterator_construct(directory_iterator& it,
const path& p, system::error_code* ec);
BOOST_FILESYSTEM_DECL void directory_iterator_increment(directory_iterator& it,
system::error_code* ec);
} // namespace detail
//--------------------------------------------------------------------------------------//
// //
// directory_iterator //
// //
//--------------------------------------------------------------------------------------//
class directory_iterator
: public boost::iterator_facade< directory_iterator,
directory_entry,
boost::single_pass_traversal_tag >
{
public:
directory_iterator() BOOST_NOEXCEPT {} // creates the "end" iterator
// iterator_facade derived classes don't seem to like implementations in
// separate translation unit dll's, so forward to detail functions
explicit directory_iterator(const path& p)
: m_imp(new detail::dir_itr_imp)
{ detail::directory_iterator_construct(*this, p, 0); }
directory_iterator(const path& p, system::error_code& ec) BOOST_NOEXCEPT
: m_imp(new detail::dir_itr_imp)
{ detail::directory_iterator_construct(*this, p, &ec); }
~directory_iterator() {}
directory_iterator& increment(system::error_code& ec) BOOST_NOEXCEPT
{
detail::directory_iterator_increment(*this, &ec);
return *this;
}
private:
friend struct detail::dir_itr_imp;
friend BOOST_FILESYSTEM_DECL void detail::directory_iterator_construct(directory_iterator& it,
const path& p, system::error_code* ec);
friend BOOST_FILESYSTEM_DECL void detail::directory_iterator_increment(directory_iterator& it,
system::error_code* ec);
// shared_ptr provides the shallow-copy semantics required for single pass iterators
// (i.e. InputIterators). The end iterator is indicated by !m_imp || !m_imp->handle
boost::shared_ptr< detail::dir_itr_imp > m_imp;
friend class boost::iterator_core_access;
boost::iterator_facade<
directory_iterator,
directory_entry,
boost::single_pass_traversal_tag >::reference dereference() const
{
BOOST_ASSERT_MSG(m_imp.get(), "attempt to dereference end iterator");
return m_imp->dir_entry;
}
void increment() { detail::directory_iterator_increment(*this, 0); }
bool equal(const directory_iterator& rhs) const
{
return m_imp == rhs.m_imp
|| (!m_imp && rhs.m_imp && !rhs.m_imp->handle)
|| (!rhs.m_imp && m_imp && !m_imp->handle);
}
}; // directory_iterator
// enable directory_iterator C++11 range-base for statement use --------------------//
// begin() and end() are only used by a range-based for statement in the context of
// auto - thus the top-level const is stripped - so returning const is harmless and
// emphasizes begin() is just a pass through.
inline
const directory_iterator& begin(const directory_iterator& iter) BOOST_NOEXCEPT
{return iter;}
inline
directory_iterator end(const directory_iterator&) BOOST_NOEXCEPT
{return directory_iterator();}
// enable directory_iterator BOOST_FOREACH -----------------------------------------//
inline
directory_iterator& range_begin(directory_iterator& iter) BOOST_NOEXCEPT
{return iter;}
inline
directory_iterator range_begin(const directory_iterator& iter) BOOST_NOEXCEPT
{return iter;}
inline
directory_iterator range_end(const directory_iterator&) BOOST_NOEXCEPT
{return directory_iterator();}
} // namespace filesystem
// namespace boost template specializations
template<>
struct range_mutable_iterator<boost::filesystem::directory_iterator>
{ typedef boost::filesystem::directory_iterator type; };
template<>
struct range_const_iterator <boost::filesystem::directory_iterator>
{ typedef boost::filesystem::directory_iterator type; };
namespace filesystem
{
//--------------------------------------------------------------------------------------//
// //
// recursive_directory_iterator helpers //
// //
//--------------------------------------------------------------------------------------//
BOOST_SCOPED_ENUM_START(symlink_option)
{
none,
no_recurse = none, // don't follow directory symlinks (default behavior)
recurse, // follow directory symlinks
_detail_no_push = recurse << 1 // internal use only
};
BOOST_SCOPED_ENUM_END
BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option))
namespace detail
{
struct recur_dir_itr_imp
{
typedef directory_iterator element_type;
std::stack< element_type, std::vector< element_type > > m_stack;
int m_level;
BOOST_SCOPED_ENUM(symlink_option) m_options;
recur_dir_itr_imp() : m_level(0), m_options(symlink_option::none) {}
void increment(system::error_code* ec); // ec == 0 means throw on error
bool push_directory(system::error_code& ec) BOOST_NOEXCEPT;
void pop();
};
// Implementation is inline to avoid dynamic linking difficulties with m_stack:
// Microsoft warning C4251, m_stack needs to have dll-interface to be used by
// clients of struct 'boost::filesystem::detail::recur_dir_itr_imp'
inline
bool recur_dir_itr_imp::push_directory(system::error_code& ec) BOOST_NOEXCEPT
// Returns: true if push occurs, otherwise false. Always returns false on error.
{
ec.clear();
// Discover if the iterator is for a directory that needs to be recursed into,
// taking symlinks and options into account.
if ((m_options & symlink_option::_detail_no_push) == symlink_option::_detail_no_push)
{
m_options &= ~symlink_option::_detail_no_push;
return false;
}
file_status symlink_stat;
// if we are not recursing into symlinks, we are going to have to know if the
// stack top is a symlink, so get symlink_status and verify no error occurred
if ((m_options & symlink_option::recurse) != symlink_option::recurse)
{
symlink_stat = m_stack.top()->symlink_status(ec);
if (ec)
return false;
}
// Logic for following predicate was contributed by Daniel Aarno to handle cyclic
// symlinks correctly and efficiently, fixing ticket #5652.
// if (((m_options & symlink_option::recurse) == symlink_option::recurse
// || !is_symlink(m_stack.top()->symlink_status()))
// && is_directory(m_stack.top()->status())) ...
// The predicate code has since been rewritten to pass error_code arguments,
// per ticket #5653.
if ((m_options & symlink_option::recurse) == symlink_option::recurse
|| !is_symlink(symlink_stat))
{
file_status stat = m_stack.top()->status(ec);
if (ec || !is_directory(stat))
return false;
directory_iterator next(m_stack.top()->path(), ec);
if (!ec && next != directory_iterator())
{
m_stack.push(next);
++m_level;
return true;
}
}
return false;
}
inline
void recur_dir_itr_imp::increment(system::error_code* ec)
// ec == 0 means throw on error
//
// Invariant: On return, the top of the iterator stack is the next valid (possibly
// end) iterator, regardless of whether or not an error is reported, and regardless of
// whether any error is reported by exception or error code. In other words, progress
// is always made so a loop on the iterator will always eventually terminate
// regardless of errors.
{
system::error_code ec_push_directory;
// if various conditions are met, push a directory_iterator into the iterator stack
if (push_directory(ec_push_directory))
{
if (ec)
ec->clear();
return;
}
// Do the actual increment operation on the top iterator in the iterator
// stack, popping the stack if necessary, until either the stack is empty or a
// non-end iterator is reached.
while (!m_stack.empty() && ++m_stack.top() == directory_iterator())
{
m_stack.pop();
--m_level;
}
// report errors if any
if (ec_push_directory)
{
if (ec)
*ec = ec_push_directory;
else
{
BOOST_FILESYSTEM_THROW(filesystem_error(
"filesystem::recursive_directory_iterator directory error",
ec_push_directory));
}
}
else if (ec)
ec->clear();
}
inline
void recur_dir_itr_imp::pop()
{
BOOST_ASSERT_MSG(m_level > 0,
"pop() on recursive_directory_iterator with level < 1");
do
{
m_stack.pop();
--m_level;
}
while (!m_stack.empty() && ++m_stack.top() == directory_iterator());
}
} // namespace detail
//--------------------------------------------------------------------------------------//
// //
// recursive_directory_iterator //
// //
//--------------------------------------------------------------------------------------//
class recursive_directory_iterator
: public boost::iterator_facade<
recursive_directory_iterator,
directory_entry,
boost::single_pass_traversal_tag >
{
public:
recursive_directory_iterator() BOOST_NOEXCEPT {} // creates the "end" iterator
explicit recursive_directory_iterator(const path& dir_path) // throws if !exists()
: m_imp(new detail::recur_dir_itr_imp)
{
m_imp->m_options = symlink_option::none;
m_imp->m_stack.push(directory_iterator(dir_path));
if (m_imp->m_stack.top() == directory_iterator())
{ m_imp.reset(); }
}
recursive_directory_iterator(const path& dir_path,
BOOST_SCOPED_ENUM(symlink_option) opt) // throws if !exists()
: m_imp(new detail::recur_dir_itr_imp)
{
m_imp->m_options = opt;
m_imp->m_stack.push(directory_iterator(dir_path));
if (m_imp->m_stack.top() == directory_iterator())
{ m_imp.reset (); }
}
recursive_directory_iterator(const path& dir_path,
BOOST_SCOPED_ENUM(symlink_option) opt,
system::error_code & ec) BOOST_NOEXCEPT
: m_imp(new detail::recur_dir_itr_imp)
{
m_imp->m_options = opt;
m_imp->m_stack.push(directory_iterator(dir_path, ec));
if (m_imp->m_stack.top() == directory_iterator())
{ m_imp.reset (); }
}
recursive_directory_iterator(const path& dir_path,
system::error_code & ec) BOOST_NOEXCEPT
: m_imp(new detail::recur_dir_itr_imp)
{
m_imp->m_options = symlink_option::none;
m_imp->m_stack.push(directory_iterator(dir_path, ec));
if (m_imp->m_stack.top() == directory_iterator())
{ m_imp.reset (); }
}
recursive_directory_iterator& increment(system::error_code& ec) BOOST_NOEXCEPT
{
BOOST_ASSERT_MSG(m_imp.get(),
"increment() on end recursive_directory_iterator");
m_imp->increment(&ec);
if (m_imp->m_stack.empty())
m_imp.reset(); // done, so make end iterator
return *this;
}
int depth() const BOOST_NOEXCEPT
{
BOOST_ASSERT_MSG(m_imp.get(),
"depth() on end recursive_directory_iterator");
return m_imp->m_level;
}
int level() const BOOST_NOEXCEPT { return depth(); }
bool recursion_pending() const BOOST_NOEXCEPT
{
BOOST_ASSERT_MSG(m_imp.get(),
"is_no_push_requested() on end recursive_directory_iterator");
return (m_imp->m_options & symlink_option::_detail_no_push)
== symlink_option::_detail_no_push;
}
bool no_push_pending() const BOOST_NOEXCEPT { return recursion_pending(); }
# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
bool no_push_request() const BOOST_NOEXCEPT { return no_push_pending(); }
# endif
void pop()
{
BOOST_ASSERT_MSG(m_imp.get(),
"pop() on end recursive_directory_iterator");
m_imp->pop();
if (m_imp->m_stack.empty()) m_imp.reset(); // done, so make end iterator
}
void disable_recursion_pending(bool value=true) BOOST_NOEXCEPT
{
BOOST_ASSERT_MSG(m_imp.get(),
"no_push() on end recursive_directory_iterator");
if (value)
m_imp->m_options |= symlink_option::_detail_no_push;
else
m_imp->m_options &= ~symlink_option::_detail_no_push;
}
void no_push(bool value=true) BOOST_NOEXCEPT { disable_recursion_pending(value); }
file_status status() const
{
BOOST_ASSERT_MSG(m_imp.get(),
"status() on end recursive_directory_iterator");
return m_imp->m_stack.top()->status();
}
file_status symlink_status() const
{
BOOST_ASSERT_MSG(m_imp.get(),
"symlink_status() on end recursive_directory_iterator");
return m_imp->m_stack.top()->symlink_status();
}
private:
// shared_ptr provides the shallow-copy semantics required for single pass iterators
// (i.e. InputIterators).
// The end iterator is indicated by !m_imp || m_imp->m_stack.empty()
boost::shared_ptr< detail::recur_dir_itr_imp > m_imp;
friend class boost::iterator_core_access;
boost::iterator_facade<
recursive_directory_iterator,
directory_entry,
boost::single_pass_traversal_tag >::reference
dereference() const
{
BOOST_ASSERT_MSG(m_imp.get(),
"dereference of end recursive_directory_iterator");
return *m_imp->m_stack.top();
}
void increment()
{
BOOST_ASSERT_MSG(m_imp.get(),
"increment of end recursive_directory_iterator");
m_imp->increment(0);
if (m_imp->m_stack.empty())
m_imp.reset(); // done, so make end iterator
}
bool equal(const recursive_directory_iterator& rhs) const
{
return m_imp == rhs.m_imp
|| (!m_imp && rhs.m_imp && rhs.m_imp->m_stack.empty())
|| (!rhs.m_imp && m_imp && m_imp->m_stack.empty()) ;
}
}; // recursive directory iterator
// enable recursive directory iterator C++11 range-base for statement use ----------//
// begin() and end() are only used by a range-based for statement in the context of
// auto - thus the top-level const is stripped - so returning const is harmless and
// emphasizes begin() is just a pass through.
inline
const recursive_directory_iterator&
begin(const recursive_directory_iterator& iter) BOOST_NOEXCEPT
{return iter;}
inline
recursive_directory_iterator end(const recursive_directory_iterator&) BOOST_NOEXCEPT
{return recursive_directory_iterator();}
// enable recursive directory iterator BOOST_FOREACH -------------------------------//
inline
recursive_directory_iterator&
range_begin(recursive_directory_iterator& iter) BOOST_NOEXCEPT
{return iter;}
inline
recursive_directory_iterator
range_begin(const recursive_directory_iterator& iter) BOOST_NOEXCEPT
{return iter;}
inline
recursive_directory_iterator range_end(const recursive_directory_iterator&) BOOST_NOEXCEPT
{return recursive_directory_iterator();}
} // namespace filesystem
// namespace boost template specializations
template<>
struct range_mutable_iterator<boost::filesystem::recursive_directory_iterator>
{ typedef boost::filesystem::recursive_directory_iterator type; };
template<>
struct range_const_iterator <boost::filesystem::recursive_directory_iterator>
{ typedef boost::filesystem::recursive_directory_iterator type; };
namespace filesystem
{
# if !defined(BOOST_FILESYSTEM_NO_DEPRECATED)
typedef recursive_directory_iterator wrecursive_directory_iterator;
# endif
// test helper -----------------------------------------------------------------------//
// Not part of the documented interface since false positives are possible;
// there is no law that says that an OS that has large stat.st_size
// actually supports large file sizes.
namespace detail
{
BOOST_FILESYSTEM_DECL bool possible_large_file_size_support();
}
} // namespace filesystem
} // namespace boost
#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
#endif // BOOST_FILESYSTEM3_OPERATIONS_HPP
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