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livetrax/libs/glibmm2/glib/glibmm/miscutils.h
Paul Davis 449aab3c46 rollback to 3428, before the mysterious removal of libs/* at 3431/3432
git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
2008-06-02 21:41:35 +00:00

321 lines
13 KiB
C++

// -*- c++ -*-
#ifndef _GLIBMM_MISCUTILS_H
#define _GLIBMM_MISCUTILS_H
/* $Id: miscutils.h 428 2007-07-29 12:43:29Z murrayc $ */
/* Copyright (C) 2002 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glibmm/arrayhandle.h>
#include <glibmm/ustring.h>
namespace Glib
{
/** @defgroup MiscUtils Miscellaneous Utility Functions
* Miscellaneous Utility Functions -- a selection of portable utility functions.
* @{
*/
/** Gets a human-readable name for the application,
* as set by Glib::set_application_name().
* This name should be localized if possible, and is intended for display to
* the user. Contrast with Glib::get_prgname(), which gets a non-localized
* name. If Glib::set_application_name() has not been called, returns the
* result of Glib::get_prgname() (which may be empty if Glib::set_prgname()
* has also not been called).
*
* @return Human-readable application name. May return <tt>""</tt>.
*/
Glib::ustring get_application_name();
/** Sets a human-readable name for the application.
* This name should be localized if possible, and is intended for display to
* the user. Contrast with Glib::set_prgname(), which sets a non-localized
* name. Glib::set_prgname() will be called automatically by
* <tt>gtk_init()</tt>, but Glib::set_application_name() will not.
*
* Note that for thread safety reasons, this function can only be called once.
*
* The application name will be used in contexts such as error messages,
* or when displaying an application's name in the task list.
*
* @param application_name Localized name of the application.
*/
void set_application_name(const Glib::ustring& application_name);
/** Gets the name of the program.
* If you are using GDK or GTK+ the program name is set in <tt>gdk_init()</tt>,
* which is called by <tt>gtk_init()</tt>. The program name is found by taking
* the last component of <tt>argv[0]</tt>.
* @return The name of the program.
*/
std::string get_prgname();
/** Sets the name of the program.
* @param prgname The name of the program.
*/
void set_prgname(const std::string& prgname);
/** Returns the value of an environment variable. The name and value
* are in the GLib file name encoding. On Unix, this means the actual
* bytes which might or might not be in some consistent character set
* and encoding. On Windows, it is in UTF-8. On Windows, in case the
* environment variable's value contains references to other
* environment variables, they are expanded.
*
* @param variable The environment variable to get.
* @retval found <tt>true</tt> Whether the environment variable has been found.
* @return The value of the environment variable, or <tt>""</tt> if not found.
*/
std::string getenv(const std::string& variable, bool& found);
/** Returns the value of an environment variable. The name and value
* are in the GLib file name encoding. On Unix, this means the actual
* bytes which might or might not be in some consistent character set
* and encoding. On Windows, it is in UTF-8. On Windows, in case the
* environment variable's value contains references to other
* environment variables, they are expanded.
*
* @param variable The environment variable to get.
* @return The value of the environment variable, or <tt>""</tt> if not found.
*/
std::string getenv(const std::string& variable);
/** Sets an environment variable. Both the variable's name and value
* should be in the GLib file name encoding. On Unix, this means that
* they can be any sequence of bytes. On Windows, they should be in
* UTF-8.
*
* Note that on some systems, when variables are overwritten, the memory
* used for the previous variables and its value isn't reclaimed.
*
* @param variable The environment variable to set. It must not contain '='.
* @param value The value to which the variable should be set.
* @param overwrite Whether to change the variable if it already exists.
* @result false if the environment variable couldn't be set.
*/
bool setenv(const std::string& variable, const std::string& value, bool overwrite = true);
/** Removes an environment variable from the environment.
*
* Note that on some systems, when variables are overwritten, the memory
* used for the previous variables and its value isn't reclaimed.
* Furthermore, this function can't be guaranteed to operate in a
* threadsafe way.
*
* @param variable: the environment variable to remove. It must not contain '='.
**/
void unsetenv(const std::string& variable);
/** Gets the user name of the current user.
* @return The name of the current user.
*/
std::string get_user_name();
/** Gets the real name of the user.
* This usually comes from the user's entry in the <tt>passwd</tt> file.
* @return The user's real name.
*/
std::string get_real_name();
/** Gets the current user's home directory.
* @return The current user's home directory or an empty string if not defined.
*/
std::string get_home_dir();
/** Gets the directory to use for temporary files.
* This is found from inspecting the environment variables <tt>TMPDIR</tt>,
* <tt>TMP</tt>, and <tt>TEMP</tt> in that order. If none of those are defined
* <tt>"/tmp"</tt> is returned on UNIX and <tt>"C:\\"</tt> on Windows.
* @return The directory to use for temporary files.
*/
std::string get_tmp_dir();
/** Gets the current directory.
* @return The current directory.
*/
std::string get_current_dir();
//TODO: We could create a C++ enum to wrap the C GUserDirectory enum,
//but we would have to either be very careful, or define the enum
//values in terms of the C enums anyway.
/** Returns the full path of a special directory using its logical id.
*
* On Unix this is done using the XDG special user directories.
*
* Depending on the platform, the user might be able to change the path
* of the special directory without requiring the session to restart; GLib
* will not reflect any change once the special directories are loaded.
*
* Return value: the path to the specified special directory.
* @param directory Te logical id of special directory
*
* @newin2p14
*/
std::string get_user_special_dir(GUserDirectory directory);
/** Returns a base directory in which to access application data such as icons
* that is customized for a particular user.
*
* On UNIX platforms this is determined using the mechanisms described in the
* XDG Base Directory Specification
*
* @newin2p14
*/
std::string get_user_data_dir();
/** Returns a base directory in which to store user-specific application
* configuration information such as user preferences and settings.
*
* On UNIX platforms this is determined using the mechanisms described in the
* XDG Base Directory Specification
*
* @newin2p14
*/
std::string get_user_config_dir();
/** Returns a base directory in which to store non-essential, cached data
* specific to particular user.
*
* On UNIX platforms this is determined using the mechanisms described in the
* XDG Base Directory Specification
*
* @newin2p14
*/
std::string get_user_cache_dir();
/** Returns @c true if the given @a filename is an absolute file name, i.e.\ it
* contains a full path from the root directory such as <tt>"/usr/local"</tt>
* on UNIX or <tt>"C:\\windows"</tt> on Windows systems.
* @param filename A file name.
* @return Whether @a filename is an absolute path.
*/
bool path_is_absolute(const std::string& filename);
/** Returns the remaining part of @a filename after the root component,
* i.e.\ after the <tt>"/"</tt> on UNIX or <tt>"C:\\"</tt> on Windows.
* If @a filename is not an absolute path, <tt>""</tt> will be returned.
* @param filename A file name.
* @return The file name without the root component, or <tt>""</tt>.
*/
std::string path_skip_root(const std::string& filename);
/** Gets the name of the file without any leading directory components.
* @param filename The name of the file.
* @return The name of the file without any leading directory components.
*/
std::string path_get_basename(const std::string& filename);
/** Gets the directory components of a file name.
* If the file name has no directory components <tt>"."</tt> is returned.
* @param filename The name of the file.
* @return The directory components of the file.
*/
std::string path_get_dirname(const std::string& filename);
/** Creates a filename from a series of elements using the correct
* separator for filenames.
* This function behaves identically to Glib::build_path(G_DIR_SEPARATOR_S,
* elements). No attempt is made to force the resulting filename to be an
* absolute path. If the first element is a relative path, the result will
* be a relative path.
* @param elements A container holding the elements of the path to build.
* Any STL compatible container type is accepted.
* @return The resulting path.
*/
std::string build_filename(const Glib::ArrayHandle<std::string>& elements);
/** Creates a filename from two elements using the correct separator for filenames.
* No attempt is made to force the resulting filename to be an absolute path.
* If the first element is a relative path, the result will be a relative path.
* @param elem1 First path element.
* @param elem2 Second path element.
* @return The resulting path.
*/
std::string build_filename(const std::string& elem1, const std::string& elem2);
/** Creates a path from a series of elements using @a separator as the
* separator between elements.
*
* At the boundary between two elements, any trailing occurrences of
* @a separator in the first element, or leading occurrences of @a separator
* in the second element are removed and exactly one copy of the separator is
* inserted.
*
* Empty elements are ignored.
*
* The number of leading copies of the separator on the result is
* the same as the number of leading copies of the separator on
* the first non-empty element.
*
* The number of trailing copies of the separator on the result is the same
* as the number of trailing copies of the separator on the last non-empty
* element. (Determination of the number of trailing copies is done without
* stripping leading copies, so if the separator is <tt>"ABA"</tt>,
* <tt>"ABABA"</tt> has 1 trailing copy.)
*
* However, if there is only a single non-empty element, and there
* are no characters in that element not part of the leading or
* trailing separators, then the result is exactly the original value
* of that element.
*
* Other than for determination of the number of leading and trailing
* copies of the separator, elements consisting only of copies
* of the separator are ignored.
*
* @param separator A string used to separate the elements of the path.
* @param elements A container holding the elements of the path to build.
* Any STL compatible container type is accepted.
* @return The resulting path.
*/
std::string build_path(const std::string& separator,
const Glib::ArrayHandle<std::string>& elements);
/** Locates the first executable named @a program in the user's path, in the
* same way that <tt>execvp()</tt> would locate it.
* Returns a string with the absolute path name, or <tt>""</tt> if the program
* is not found in the path. If @a program is already an absolute path,
* returns a copy of @a program if @a program exists and is executable, and
* <tt>""</tt> otherwise.
*
* On Windows, if @a program does not have a file type suffix, tries to append
* the suffixes in the <tt>PATHEXT</tt> environment variable (if that doesn't
* exist, the suffixes .com, .exe, and .bat) in turn, and then look for the
* resulting file name in the same way as CreateProcess() would. This means
* first in the directory where the program was loaded from, then in the
* current directory, then in the Windows 32-bit system directory, then in the
* Windows directory, and finally in the directories in the <tt>PATH</tt>
* environment variable. If the program is found, the return value contains
* the full name including the type suffix.
*
* @param program A program name.
* @return An absolute path, or <tt>""</tt>.
*/
std::string find_program_in_path(const std::string& program);
/** @} group MiscUtils */
} // namespace Glib
#endif /* _GLIBMM_FILEUTILS_H */