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/*************************************************************************
** FileSystem.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2010 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program 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 General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include <cstdlib>
#include <cstring>
#include <fstream>
#include "FileSystem.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
using namespace std;
#ifdef __WIN32__
#include <direct.h>
#include <windows.h>
const char *FileSystem::DEVNULL = "nul";
const char FileSystem::PATHSEP = '\\';
#define unlink _unlink
#else
#include <dirent.h>
#include <pwd.h>
#include <sys/stat.h>
#include <sys/types.h>
const char *FileSystem::DEVNULL = "/dev/null";
const char FileSystem::PATHSEP = '/';
#endif
bool FileSystem::remove (const string &fname) {
return unlink(fname.c_str()) == 0;
}
bool FileSystem::rename (const string &oldname, const string &newname) {
return ::rename(oldname.c_str(), newname.c_str()) == 0;
}
UInt64 FileSystem::filesize (const string &fname) {
#ifdef __WIN32__
// unfortunately, stat doesn't work properly under Windows
// so we have to use this freaky code
WIN32_FILE_ATTRIBUTE_DATA attr;
GetFileAttributesExA(fname.c_str(), GetFileExInfoStandard, &attr);
return (static_cast<UInt64>(attr.nFileSizeHigh) << (8*sizeof(attr.nFileSizeLow))) | attr.nFileSizeLow;
#else
struct stat attr;
return (stat(fname.c_str(), &attr) == 0) ? attr.st_size : 0;
#endif
}
string FileSystem::adaptPathSeperators (string path) {
for (size_t i=0; i < path.length(); i++)
if (path[i] == PATHSEP)
path[i] = '/';
return path;
}
string FileSystem::getcwd () {
char buf[1024];
#ifdef __WIN32__
return adaptPathSeperators(_getcwd(buf, 1024));
#else
return ::getcwd(buf, 1024);
#endif
}
/** Changes the work directory.
* @param[in] path to new work directory
* @return true on success */
bool FileSystem::chdir (const char *dir) {
bool success = false;
if (dir) {
#ifdef __WIN32__
success = (_chdir(dir) == 0);
#else
success = (chdir(dir) == 0);
#endif
}
return success;
}
/** Returns the user's home directory. */
const char* FileSystem::userdir () {
#ifdef __WIN32__
const char *drive=getenv("HOMEDRIVE");
const char *path=getenv("HOMEPATH");
if (drive && path) {
static string ret = string(drive)+path;
if (!ret.empty())
return ret.c_str();
}
return 0;
#else
const char *dir=getenv("HOME");
if (!dir) {
if (const char *user=getenv("USER")) {
if (struct passwd *pw=getpwnam(user))
dir = pw->pw_dir;
}
}
return dir;
#endif
}
/** Private wrapper function for mkdir: creates a single folder.
* @param[in] dir folder name
* @return true on success */
static bool s_mkdir (const char *dir) {
bool success = true;
if (!FileSystem::exists(dir)) {
#ifdef __WIN32__
success = (_mkdir(dir) == 0);
#else
success = (mkdir(dir, 0776) == 0);
#endif
}
return success;
}
static bool inline s_rmdir (const char *dir) {
#ifdef __WIN32__
return (_rmdir(dir) == 0);
#else
return (rmdir(dir) == 0);
#endif
}
/** Removes leading and trailing whitespace from a string. */
static string trim (const string &str) {
int first=0, last=str.length()-1;
while (isspace(str[first]))
first++;
while (isspace(str[last]))
last--;
return str.substr(first, last-first+1);
}
/** Creates a new folder relative to the current work directory. If necessary,
* the parent folders are also created.
* @param[in] dir single folder name or path to folder
* @return true if folder(s) could be created */
bool FileSystem::mkdir (const char *dir) {
bool success = false;
if (dir) {
success = true;
const string dirstr = adaptPathSeperators(trim(dir));
for (size_t pos=1; success && (pos = dirstr.find('/', pos)) != string::npos; pos++)
success &= s_mkdir(dirstr.substr(0, pos).c_str());
success &= s_mkdir(dirstr.c_str());
}
return success;
}
/** Removes a directory and its contents.
* @param[in] dirname path to directory
* @return true on success */
bool FileSystem::rmdir (const char *dirname) {
bool ok = false;
if (dirname && isDirectory(dirname)) {
ok = true;
#ifdef __WIN32__
string pattern = string(dirname) + "/*";
WIN32_FIND_DATA data;
HANDLE h = FindFirstFile(pattern.c_str(), &data);
bool ready = (h == INVALID_HANDLE_VALUE);
while (!ready && ok) {
const char *fname = data.cFileName;
string path = string(dirname) + "/" + fname;
if (isDirectory(path.c_str())) {
if (strcmp(fname, ".") != 0 && strcmp(fname, "..") != 0)
ok = rmdir(path.c_str()) && s_rmdir(path.c_str());
}
else if (isFile(path.c_str()))
ok = remove(path);
else
ok = false;
ready = !FindNextFile(h, &data);
}
FindClose(h);
#else
if (DIR *dir = opendir(dirname)) {
struct dirent *ent;
while ((ent = readdir(dir)) && ok) {
const char *fname = ent->d_name;
string path = string(fname) + "/" + fname;
if (isDirectory(path.c_str())) {
if (strcmp(fname, ".") != 0 && strcmp(fname, "..") != 0)
ok = rmdir(path.c_str()) && s_rmdir(path.c_str());
}
else if (isFile(path.c_str()))
ok = remove(path);
else
ok = false;
}
closedir(dir);
}
#endif
ok = s_rmdir(dirname);
}
return ok;
}
/** Checks if a file or directory exits. */
bool FileSystem::exists (const char *fname) {
if (!fname)
return false;
#ifdef __WIN32__
return GetFileAttributes(fname) != INVALID_FILE_ATTRIBUTES;
#else
struct stat attr;
return stat(fname, &attr) == 0;
#endif
}
/** Returns true if 'fname' references a directory. */
bool FileSystem::isDirectory (const char *fname) {
if (!fname)
return false;
#ifdef __WIN32__
return GetFileAttributes(fname) & FILE_ATTRIBUTE_DIRECTORY;
#else
struct stat attr;
return stat(fname, &attr) == 0 && S_ISDIR(attr.st_mode);
#endif
}
/** Returns true if 'fname' references a file. */
bool FileSystem::isFile (const char *fname) {
if (!fname)
return false;
#ifdef __WIN32__
ifstream ifs(fname);
return ifs;
#else
struct stat attr;
return stat(fname, &attr) == 0 && S_ISREG(attr.st_mode);
#endif
}
int FileSystem::collect (const char *dirname, vector<string> &entries) {
entries.clear();
#ifdef __WIN32__
string pattern = string(dirname) + "/*";
WIN32_FIND_DATA data;
HANDLE h = FindFirstFile(pattern.c_str(), &data);
bool ready = (h == INVALID_HANDLE_VALUE);
while (!ready) {
string fname = data.cFileName;
string path = string(dirname)+"/"+fname;
string typechar = isFile(path.c_str()) ? "f" : isDirectory(path.c_str()) ? "d" : "?";
if (fname != "." && fname != "..")
entries.push_back(typechar+fname);
ready = !FindNextFile(h, &data);
}
FindClose(h);
#else
if (DIR *dir = opendir(dirname)) {
struct dirent *ent;
while ((ent = readdir(dir))) {
string fname = ent->d_name;
string path = string(dirname)+"/"+fname;
string typechar = isFile(path.c_str()) ? "f" : isDirectory(path.c_str()) ? "d" : "?";
if (fname != "." && fname != "..")
entries.push_back(typechar+fname);
}
closedir(dir);
}
#endif
return entries.size();
}
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