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/* Copyright (c) 2008-2022 the MRtrix3 contributors.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Covered Software is provided under this License on an "as is"
* basis, without warranty of any kind, either expressed, implied, or
* statutory, including, without limitation, warranties that the
* Covered Software is free of defects, merchantable, fit for a
* particular purpose or non-infringing.
* See the Mozilla Public License v. 2.0 for more details.
*
* For more details, see http://www.mrtrix.org/.
*/
#ifndef __file_path_h__
#define __file_path_h__
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <string>
#include <cstdlib>
#include <cstring>
#include <cerrno>
#include <unistd.h>
#include <algorithm>
#include "exception.h"
#include "mrtrix.h"
#include "types.h"
#define HOME_ENV "HOME"
/*! \def PATH_SEPARATORS
* \brief symbols used for separating directories in filesystem paths
*
* The PATH_SEPARATORS macro contains all characters that may be used
* to delimit directory / file names in a filesystem path. On
* POSIX-compliant systems, this is simply the forward-slash character
* '/'; on Windows however, either forward-slashes or back-slashes
* can appear. Therefore any code that performs such direct
* manipulation of filesystem paths should both use this macro, and
* be written accounting for the possibility of this string containing
* either one or two characters depending on the target system. */
#ifdef MRTRIX_WINDOWS
// Preferentially use forward-slash when inserting via PATH_SEPARATORS[0]
#define PATH_SEPARATORS "/\\"
#else
#define PATH_SEPARATORS "/"
#endif
namespace MR
{
namespace Path
{
inline std::string basename (const std::string& name)
{
size_t i = name.find_last_of (PATH_SEPARATORS);
return (i == std::string::npos ? name : name.substr (i+1));
}
inline std::string dirname (const std::string& name)
{
size_t i = name.find_last_of (PATH_SEPARATORS);
return (i == std::string::npos ? std::string ("") : (i ? name.substr (0,i) : std::string(1, PATH_SEPARATORS[0])));
}
inline std::string join (const std::string& first, const std::string& second)
{
if (first.empty())
return second;
if (first[first.size()-1] != PATH_SEPARATORS[0]
#ifdef MRTRIX_WINDOWS
&& first[first.size()-1] != PATH_SEPARATORS[1]
#endif
)
return first + PATH_SEPARATORS[0] + second;
return first + second;
}
inline bool exists (const std::string& path)
{
struct stat buf;
#ifdef MRTRIX_WINDOWS
const std::string stripped (strip (path, PATH_SEPARATORS, false, true));
if (!stat (stripped.c_str(), &buf))
#else
if (!stat (path.c_str(), &buf))
#endif
return true;
if (errno == ENOENT) return false;
throw Exception (strerror (errno));
return false;
}
inline bool is_dir (const std::string& path)
{
struct stat buf;
#ifdef MRTRIX_WINDOWS
const std::string stripped (strip (path, PATH_SEPARATORS, false, true));
if (!stat (stripped.c_str(), &buf))
#else
if (!stat (path.c_str(), &buf))
#endif
return S_ISDIR (buf.st_mode);
if (errno == ENOENT) return false;
throw Exception (strerror (errno));
return false;
}
inline bool is_file (const std::string& path)
{
struct stat buf;
if (!stat (path.c_str(), &buf)) return S_ISREG (buf.st_mode);
if (errno == ENOENT) return false;
throw Exception (strerror (errno));
return false;
}
inline bool has_suffix (const std::string& name, const std::string& suffix)
{
return name.size() >= suffix.size() &&
name.compare(name.size() - suffix.size(), suffix.size(), suffix) == 0;
}
inline bool has_suffix (const std::string &name, const std::initializer_list<const std::string> &suffix_list)
{
return std::any_of (suffix_list.begin(),
suffix_list.end(),
[&] (const std::string& suffix) { return has_suffix (name, suffix); });
}
inline bool has_suffix (const std::string &name, const vector<std::string> &suffix_list)
{
return std::any_of (suffix_list.begin(),
suffix_list.end(),
[&] (const std::string& suffix) { return has_suffix (name, suffix); });
}
inline bool is_mrtrix_image (const std::string& name)
{
return strcmp(name.c_str(), std::string("-").c_str()) == 0 ||
Path::has_suffix (name, {".mif", ".mih", ".mif.gz"});
}
inline std::string cwd ()
{
std::string path;
size_t buf_size = 32;
while (true) {
path.reserve (buf_size);
if (getcwd (&path[0], buf_size))
break;
if (errno != ERANGE)
throw Exception ("failed to get current working directory!");
buf_size *= 2;
}
return path;
}
inline std::string home ()
{
const char* home = getenv (HOME_ENV);
if (!home)
throw Exception (HOME_ENV " environment variable is not set!");
return home;
}
class Dir { NOMEMALIGN
public:
Dir (const std::string& name) :
p (opendir (name.size() ? name.c_str() : ".")) {
if (!p)
throw Exception ("error opening folder " + name + ": " + strerror (errno));
}
~Dir () {
if (p) closedir (p);
}
std::string read_name () {
std::string ret;
struct dirent* entry = readdir (p);
if (entry) {
ret = entry->d_name;
if (ret == "." || ret == "..")
ret = read_name();
}
return ret;
}
void rewind () {
rewinddir (p);
}
void close () {
if (p) closedir (p);
p = NULL;
}
protected:
DIR* p;
};
inline char delimiter (const std::string& filename)
{
if (Path::has_suffix (filename, ".tsv"))
return '\t';
else if (Path::has_suffix (filename, ".csv"))
return ',';
else
return ' ';
}
}
}
#endif
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