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37 * Implements functions in path.h.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
40 * \ingroup module_utility
42 #include "gromacs/utility/path.h"
54 #ifdef GMX_NATIVE_WINDOWS
62 #include "gromacs/fileio/futil.h"
63 #include "gromacs/utility/stringutil.h"
68 //! \addtogroup module_utility
71 //! Directory separator to use when joining paths.
72 const char cDirSeparator = '/';
73 //! Directory separators to use when parsing paths.
74 const char cDirSeparators[] = "/\\";
75 /*! \var cPathSeparator
77 * Separator to use to split the PATH environment variable.
79 * When reading the PATH environment variable, Unix separates entries
80 * with colon, while windows uses semicolon.
82 #ifdef GMX_NATIVE_WINDOWS
83 const char cPathSeparator = ';';
85 const char cPathSeparator = ':';
88 //! Check whether a given character is a directory separator.
89 bool isDirSeparator(char chr)
91 return std::strchr(cDirSeparators, chr);
101 /********************************************************************
105 bool Path::containsDirectory(const std::string &path)
107 return path.find_first_of(cDirSeparators) != std::string::npos;
110 /* Check if the program name begins with "/" on unix/cygwin, or
111 * with "\" or "X:\" on windows. If not, the program name
112 * is relative to the current directory.
114 bool Path::isAbsolute(const char *path)
116 if (isDirSeparator(path[0]))
120 #ifdef GMX_NATIVE_WINDOWS
121 return path[0] != '\0' && path[1] == ':' && isDirSeparator(path[2]);
127 bool Path::isAbsolute(const std::string &path)
129 return isAbsolute(path.c_str());
132 bool Path::startsWith(const std::string &path, const std::string &prefix)
134 return gmx::startsWith(normalize(path), normalize(prefix));
137 std::string Path::join(const std::string &path1,
138 const std::string &path2)
140 // TODO: Remove extra separators if they are present in the input paths.
141 return path1 + cDirSeparator + path2;
145 std::string Path::join(const std::string &path1,
146 const std::string &path2,
147 const std::string &path3)
149 // TODO: Remove extra separators if they are present in the input paths.
150 return path1 + cDirSeparator + path2 + cDirSeparator + path3;
153 std::string Path::getParentPath(const std::string &path)
155 size_t pos = path.find_last_of(cDirSeparators);
156 if (pos == std::string::npos)
158 return std::string();
160 return path.substr(0, pos);
163 std::string Path::getFilename(const std::string &path)
165 size_t pos = path.find_last_of(cDirSeparators);
166 if (pos == std::string::npos)
170 return path.substr(pos+1);
173 std::string Path::normalize(const std::string &path)
175 std::string result(path);
176 // TODO: Remove . and .. entries.
177 if (DIR_SEPARATOR != '/')
179 std::replace(result.begin(), result.end(), '/', DIR_SEPARATOR);
181 #ifdef GMX_NATIVE_WINDOWS
182 if (std::isalpha(result[0]) && result[1] == ':')
184 result[0] = std::toupper(result[0]);
190 bool Path::exists(const char *path)
192 return gmx_fexist(path);
195 bool Path::exists(const std::string &path)
197 return exists(path.c_str());
200 std::string Path::getWorkingDirectory()
202 // TODO: Use exceptions instead of gmx_fatal().
203 char cwd[GMX_PATH_MAX];
204 gmx_getcwd(cwd, sizeof(cwd));
208 void Path::splitPathEnvironment(const std::string &pathEnv,
209 std::vector<std::string> *result)
215 separator = pathEnv.find(cPathSeparator, prevPos);
216 result->push_back(pathEnv.substr(prevPos, separator - prevPos));
217 prevPos = separator + 1;
219 while (separator != std::string::npos);
222 std::vector<std::string> Path::getExecutablePaths()
224 std::vector<std::string> result;
225 #ifdef GMX_NATIVE_WINDOWS
226 // Add the local dir since it is not in the path on Windows.
227 result.push_back("");
229 const char *path = std::getenv("PATH");
232 splitPathEnvironment(path, &result);
237 std::string Path::resolveSymlinks(const std::string &path)
239 std::string result(path);
240 #ifndef GMX_NATIVE_WINDOWS
241 char buf[GMX_PATH_MAX];
243 while ((length = readlink(result.c_str(), buf, sizeof(buf)-1)) > 0)
252 result = join(getParentPath(result), buf);
260 /********************************************************************
264 int Directory::create(const char *path)
266 if (Directory::exists(path))
270 #ifdef GMX_NATIVE_WINDOWS
273 if (mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IWOTH) != 0)
276 // TODO: Proper error handling.
283 int Directory::create(const std::string &path)
285 return create(path.c_str());
289 bool Directory::exists(const char *path)
292 if (stat(path, &info) != 0)
294 if (errno != ENOENT && errno != ENOTDIR)
296 // TODO: Proper error handling.
300 #ifdef GMX_NATIVE_WINDOWS
301 return ((_S_IFDIR & info.st_mode) != 0);
303 return S_ISDIR(info.st_mode);
308 bool Directory::exists(const std::string &path)
310 return exists(path.c_str());