filesys_tools.cpp

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// HOG-Man - Hierarchical Optimization for Pose Graphs on Manifolds
// Copyright (C) 2010 G. Grisetti, R. Kümmerle, C. Stachniss
// 
// HOG-Man is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// HOG-Man is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/***************************************************************************
 *            filesysTools.cpp
 *
 *  Fr 02 Mär 2007 23:14:08 CET
 *  Copyright 2007 Rainer Kümmerle
 *  Email rk@raikue.net
 ****************************************************************************/
#include "filesys_tools.h"

#include <sys/stat.h>
#include <ctime>
#include <sys/types.h>
#include <dirent.h>
#include <cstdio>
#include <iostream>

#ifdef LINUX
#include <wordexp.h>
#endif //LINUX

#ifdef WINDOWS
typedef unsigned int uint;
#endif //windows

namespace AISNavigation {

std::string getFileExtension(const std::string& filename)
{
  std::string::size_type lastDot = filename.find_last_of('.');
  if (lastDot != std::string::npos) 
    return filename.substr(lastDot + 1);
  else
    return "";
}

std::string getPureFilename(const std::string& filename)
{
  std::string::size_type lastDot = filename.find_last_of('.');
  if (lastDot != std::string::npos) 
    return filename.substr(0, lastDot);
  else
    return filename;
}

std::string getBasename(const std::string& filename)
{
  std::string::size_type lastSlash = filename.find_last_of('/');
  if (lastSlash != std::string::npos) 
    return filename.substr(lastSlash + 1);
  else
    return filename;
}

std::string getDirname(const std::string& filename)
{
  std::string::size_type lastSlash = filename.find_last_of('/');
  if (lastSlash != std::string::npos) 
    return filename.substr(0, lastSlash);
  else
    return "";
}

std::string changeFileExtension(const std::string& filename, const std::string& newExt, bool stripDot)
{
  std::string::size_type lastDot = filename.find_last_of('.');
  if (lastDot != std::string::npos) {
    if (stripDot)
      return filename.substr(0, lastDot) + newExt;
    else
      return filename.substr(0, lastDot + 1) + newExt;
  } else
    return filename;
}

bool fileExists(const char* filename)
{
  struct stat statInfo;
  return (stat(filename, &statInfo) == 0);
}

bool isRegularFile(const char* filename)
{
  struct stat statInfo;
  return (stat(filename, &statInfo) == 0 && S_ISREG(statInfo.st_mode));
}

bool isDirectory(const char* filename)
{
  struct stat statInfo;
  return (stat(filename, &statInfo) == 0 && S_ISDIR(statInfo.st_mode));
}

bool isSymbolicLink(const char* filename)
{
#ifdef WINDOWS
  return false;
#else
  struct stat statInfo;
  return (lstat(filename, &statInfo) == 0 && S_ISLNK(statInfo.st_mode));
#endif
}

std::string getCurrentDateAsFilename()
{
  time_t t = time(NULL);
  const size_t dateStrSize = 1024;
  char dateStr[dateStrSize];
  if (strftime(dateStr, dateStrSize, "%Y%m%d_%H%M%S", localtime(&t)) == 0)
    fprintf(stderr, "Error (%s: %s) Date: %s\n", __FILE__, __func__, dateStr);
  return std::string(dateStr);
}

time_t getLastModificationDate(const char* filename)
{
  struct stat statInfo;
  if (stat(filename, &statInfo) == 0) {
    return statInfo.st_mtime;
  } else {
    return 0;
  }
}

time_t getLastAccessDate(const char* filename)
{
  struct stat statInfo;
  if (stat(filename, &statInfo) == 0) {
    return statInfo.st_atime;
  } else {
    return 0;
  }
}

time_t getLastStatusChangeDate(const char* filename)
{
  struct stat statInfo;
  if (stat(filename, &statInfo) == 0) {
    return statInfo.st_ctime;
  } else {
    return 0;
  }
}

#ifdef LINUX
bool createDirectory(const char* dirName, bool pub)
{
  bool status = true;
  status &= (mkdir(dirName, 0) == 0);
  if (pub)
    status &= (0 == chmod(dirName, // set directory to rwxrwxrwx
          S_IRUSR | S_IWUSR | S_IXUSR |
          S_IRGRP | S_IWGRP | S_IXGRP |
          S_IROTH | S_IWOTH | S_IXOTH ));
  else
    status &= (0 == chmod(dirName, // set directory to rwxr-xr-x
          S_IRUSR | S_IWUSR | S_IXUSR |
          S_IRGRP | S_IXGRP |
          S_IROTH | S_IXOTH ));
  return status;
}
#endif

#ifdef WINDOWS
bool createDirectory(const char* dirName, bool pub)
{
  bool status = true;
  status &= (mkdir(dirName) == 0);
  return status;
}
#endif

off_t getFileSize(const char* filename)
{
  struct stat statInfo;
  if (stat(filename, &statInfo) == 0) {
    return statInfo.st_size;
  } else {
    return -1;
  }
}

std::vector<std::string> getDirectoryElements(const char* dir, bool onlyFiles)
{
  std::vector<std::string> dirEntries;
  DIR* curDir = opendir(dir);
  if(curDir == NULL) {
    return dirEntries;
  }

  struct dirent* dirEnt = readdir(curDir);
  while(dirEnt != NULL) {
    std::string name = dirEnt->d_name;
#ifdef LINUX
    if (name != "." && name != ".." && (!onlyFiles || dirEnt->d_type == DT_REG))
      dirEntries.push_back(name);
#endif //linux

#ifdef WINDOWS
    if (name != "." && name != ".." && (!onlyFiles))
      dirEntries.push_back(name);
#endif //windows
    dirEnt = readdir(curDir);
  }
  closedir(curDir);
  return dirEntries;
}

std::vector<std::string> getFilesByPattern(const char* pattern)
{
  
  #ifdef LINUX
  std::vector<std::string> result;
  wordexp_t p;
  wordexp(pattern, &p, 0);
  result.reserve(p.we_wordc);
  for (size_t i = 0; i < p.we_wordc; ++i)
    result.push_back(p.we_wordv[i]);
  wordfree(&p);
  return result;
  #endif //LINUX

  
  #ifdef WINDOWS
  std::cerr << "WARNING: " << __PRETTY_FUNCTION__ << " not implemented on windows target" << std::endl;
  return std::vector<std::string>();
  #endif// WINDOWS

}

}