libcruft-util/posix/dir.cpp

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2015-08-10 15:46:13 +10:00
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#include "dir.hpp"
#include "../except.hpp"
using util::posix::dir;
///////////////////////////////////////////////////////////////////////////////
//struct entry {
//public:
// entry (dirent *_handle, DIR *_parent): m_handle (_handle), m_parent (_parent) { ; }
//
// const char* name (void) const { return m_handle->d_name; }
//
// entry& operator++ (void) {
// dirent *next = readdir (m_parent);
// assert (!next || next != m_handle);
// m_handle = next;
// return *this;
// }
//
// entry& operator* (void) { return *this; }
// const entry& operator* (void) const;
// bool operator!= (entry rhs) const { return m_handle != rhs.m_handle || m_parent != rhs.m_parent; }
//
// struct dirent *m_handle;
// DIR *m_parent;
//};
///////////////////////////////////////////////////////////////////////////////
dir::dir (const char *path):
m_handle (opendir (path))
{
if (!m_handle)
errno_error::throw_code ();
}
//-----------------------------------------------------------------------------
dir::~dir ()
{
errno_error::try_code (closedir (m_handle));
}
///////////////////////////////////////////////////////////////////////////////
dir::operator DIR* (void)
{
return m_handle;
}
///////////////////////////////////////////////////////////////////////////////
void
dir::scan(std::function<void(const char*)> cb)
{
rewind ();
for (dirent *cursor; errno = 0, cursor = readdir (m_handle); )
cb (cursor->d_name);
errno_error::try_code ();
}
///////////////////////////////////////////////////////////////////////////////
void
dir::rewind (void)
{
rewinddir (m_handle);
}