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// file : libbutl/filesystem.ixx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <libbutl/utility.hxx> // operator<<(ostream,exception),
// throw_generic_error()
namespace butl
{
inline bool
dir_empty (const dir_path& d)
{
// @@ Could 0 size be a valid and faster way?
//
return dir_iterator (d, dir_iterator::no_follow) == dir_iterator ();
}
inline bool
file_empty (const path& f)
{
auto p (path_entry (f, true /* follow_symlinks */));
if (p.first && p.second.type == entry_type::regular)
return p.second.size == 0;
throw_generic_error (
p.first
? (p.second.type == entry_type::directory ? EISDIR : EINVAL)
: ENOENT);
}
inline rmdir_status
try_rmdir_r (const dir_path& p, bool ignore_error)
{
//@@ What if it exists but is not a directory?
//
bool e (dir_exists (p, ignore_error));
if (e)
rmdir_r (p, true, ignore_error);
return e ? rmdir_status::success : rmdir_status::not_exist;
}
LIBBUTL_SYMEXPORT optional<rmfile_status>
try_rmfile_maybe_ignore_error (const path&, bool ignore_error);
inline rmfile_status
try_rmfile (const path& p, bool ignore_error)
{
auto r (try_rmfile_maybe_ignore_error (p, ignore_error));
return r ? *r : rmfile_status::success;
}
inline optional<rmfile_status>
try_rmfile_ignore_error (const path& p)
{
return try_rmfile_maybe_ignore_error (p, true);
}
inline path
followsymlink (const path& p)
{
std::pair<path, bool> r (try_followsymlink (p));
if (!r.second)
throw_generic_error (ENOENT);
return std::move (r.first);
}
// auto_rm
//
template <typename P>
inline auto_rm<P>::
auto_rm (auto_rm&& x)
: path (std::move (x.path)), active (x.active)
{
x.active = false;
}
template <typename P>
inline auto_rm<P>& auto_rm<P>::
operator= (auto_rm&& x)
{
if (this != &x)
{
path = std::move (x.path);
active = x.active;
x.active = false;
}
return *this;
}
template <>
inline auto_rm<path>::
~auto_rm () {if (active && !path.empty ()) try_rmfile (path, true);}
template <>
inline auto_rm<dir_path>::
~auto_rm () {if (active && !path.empty ()) try_rmdir_r (path, true);}
// cpflags
//
inline cpflags operator& (cpflags x, cpflags y) {return x &= y;}
inline cpflags operator| (cpflags x, cpflags y) {return x |= y;}
inline cpflags operator&= (cpflags& x, cpflags y)
{
return x = static_cast<cpflags> (
static_cast<std::uint16_t> (x) &
static_cast<std::uint16_t> (y));
}
inline cpflags operator|= (cpflags& x, cpflags y)
{
return x = static_cast<cpflags> (
static_cast<std::uint16_t> (x) |
static_cast<std::uint16_t> (y));
}
// permissions
//
inline permissions operator& (permissions x, permissions y) {return x &= y;}
inline permissions operator| (permissions x, permissions y) {return x |= y;}
inline permissions operator&= (permissions& x, permissions y)
{
return x = static_cast<permissions> (
static_cast<std::uint16_t> (x) &
static_cast<std::uint16_t> (y));
}
inline permissions operator|= (permissions& x, permissions y)
{
return x = static_cast<permissions> (
static_cast<std::uint16_t> (x) |
static_cast<std::uint16_t> (y));
}
// dir_entry
//
inline entry_type dir_entry::
ltype () const
{
return t_ ? *t_ : *(t_ = type (false /* follow_symlinks */));
}
inline entry_type dir_entry::
type () const
{
entry_type t (ltype ());
return t != entry_type::symlink ? t :
lt_ ? *lt_ :
*(lt_ = type (true /* follow_symlinks */));
}
// dir_iterator
//
inline dir_iterator::
dir_iterator (dir_iterator&& x) noexcept
: e_ (std::move (x.e_)), h_ (x.h_), mode_ (x.mode_)
{
#ifndef _WIN32
x.h_ = nullptr;
#else
x.h_ = -1;
#endif
}
inline bool
operator== (const dir_iterator& x, const dir_iterator& y)
{
return x.h_ == y.h_;
}
inline bool
operator!= (const dir_iterator& x, const dir_iterator& y)
{
return !(x == y);
}
inline dir_iterator
begin (dir_iterator& i)
{
return std::move (i);
}
inline dir_iterator
end (const dir_iterator&)
{
return dir_iterator ();
}
}
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