1/* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
16 */
17
18/*
19 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GLib Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GLib at ftp://ftp.gtk.org/pub/gtk/.
23 */
24
25#ifndef __G_UTILS_H__
26#define __G_UTILS_H__
27
28#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
29#error "Only <glib.h> can be included directly."
30#endif
31
32#include <glib/gtypes.h>
33#include <stdarg.h>
34
35G_BEGIN_DECLS
36
37/* Define G_VA_COPY() to do the right thing for copying va_list variables.
38 * glibconfig.h may have already defined G_VA_COPY as va_copy or __va_copy.
39 */
40#if !defined (G_VA_COPY)
41# if defined (__GNUC__) && defined (__PPC__) && (defined (_CALL_SYSV) || defined (_WIN32))
42# define G_VA_COPY(ap1, ap2) (*(ap1) = *(ap2))
43# elif defined (G_VA_COPY_AS_ARRAY)
44# define G_VA_COPY(ap1, ap2) memmove ((ap1), (ap2), sizeof (va_list))
45# else /* va_list is a pointer */
46# define G_VA_COPY(ap1, ap2) ((ap1) = (ap2))
47# endif /* va_list is a pointer */
48#endif /* !G_VA_COPY */
49
50GLIB_AVAILABLE_IN_ALL
51const gchar * g_get_user_name (void);
52GLIB_AVAILABLE_IN_ALL
53const gchar * g_get_real_name (void);
54GLIB_AVAILABLE_IN_ALL
55const gchar * g_get_home_dir (void);
56GLIB_AVAILABLE_IN_ALL
57const gchar * g_get_tmp_dir (void);
58GLIB_AVAILABLE_IN_ALL
59const gchar * g_get_host_name (void);
60GLIB_AVAILABLE_IN_ALL
61const gchar * g_get_prgname (void);
62GLIB_AVAILABLE_IN_ALL
63void g_set_prgname (const gchar *prgname);
64GLIB_AVAILABLE_IN_ALL
65const gchar * g_get_application_name (void);
66GLIB_AVAILABLE_IN_ALL
67void g_set_application_name (const gchar *application_name);
68
69GLIB_AVAILABLE_IN_ALL
70void g_reload_user_special_dirs_cache (void);
71GLIB_AVAILABLE_IN_ALL
72const gchar * g_get_user_data_dir (void);
73GLIB_AVAILABLE_IN_ALL
74const gchar * g_get_user_config_dir (void);
75GLIB_AVAILABLE_IN_ALL
76const gchar * g_get_user_cache_dir (void);
77GLIB_AVAILABLE_IN_ALL
78const gchar * const * g_get_system_data_dirs (void);
79
80#ifdef G_OS_WIN32
81/* This functions is not part of the public GLib API */
82GLIB_AVAILABLE_IN_ALL
83const gchar * const * g_win32_get_system_data_dirs_for_module (void (*address_of_function)(void));
84#endif
85
86#if defined (G_OS_WIN32) && defined (G_CAN_INLINE) && !defined (__cplusplus)
87/* This function is not part of the public GLib API either. Just call
88 * g_get_system_data_dirs() in your code, never mind that that is
89 * actually a macro and you will in fact call this inline function.
90 */
91static inline const gchar * const *
92_g_win32_get_system_data_dirs (void)
93{
94 return g_win32_get_system_data_dirs_for_module ((void (*)(void)) &_g_win32_get_system_data_dirs);
95}
96#define g_get_system_data_dirs _g_win32_get_system_data_dirs
97#endif
98
99GLIB_AVAILABLE_IN_ALL
100const gchar * const * g_get_system_config_dirs (void);
101
102GLIB_AVAILABLE_IN_ALL
103const gchar * g_get_user_runtime_dir (void);
104
105/**
106 * GUserDirectory:
107 * @G_USER_DIRECTORY_DESKTOP: the user's Desktop directory
108 * @G_USER_DIRECTORY_DOCUMENTS: the user's Documents directory
109 * @G_USER_DIRECTORY_DOWNLOAD: the user's Downloads directory
110 * @G_USER_DIRECTORY_MUSIC: the user's Music directory
111 * @G_USER_DIRECTORY_PICTURES: the user's Pictures directory
112 * @G_USER_DIRECTORY_PUBLIC_SHARE: the user's shared directory
113 * @G_USER_DIRECTORY_TEMPLATES: the user's Templates directory
114 * @G_USER_DIRECTORY_VIDEOS: the user's Movies directory
115 * @G_USER_N_DIRECTORIES: the number of enum values
116 *
117 * These are logical ids for special directories which are defined
118 * depending on the platform used. You should use g_get_user_special_dir()
119 * to retrieve the full path associated to the logical id.
120 *
121 * The #GUserDirectory enumeration can be extended at later date. Not
122 * every platform has a directory for every logical id in this
123 * enumeration.
124 *
125 * Since: 2.14
126 */
127typedef enum {
128 G_USER_DIRECTORY_DESKTOP,
129 G_USER_DIRECTORY_DOCUMENTS,
130 G_USER_DIRECTORY_DOWNLOAD,
131 G_USER_DIRECTORY_MUSIC,
132 G_USER_DIRECTORY_PICTURES,
133 G_USER_DIRECTORY_PUBLIC_SHARE,
134 G_USER_DIRECTORY_TEMPLATES,
135 G_USER_DIRECTORY_VIDEOS,
136
137 G_USER_N_DIRECTORIES
138} GUserDirectory;
139
140GLIB_AVAILABLE_IN_ALL
141const gchar * g_get_user_special_dir (GUserDirectory directory);
142
143/**
144 * GDebugKey:
145 * @key: the string
146 * @value: the flag
147 *
148 * Associates a string with a bit flag.
149 * Used in g_parse_debug_string().
150 */
151typedef struct _GDebugKey GDebugKey;
152struct _GDebugKey
153{
154 const gchar *key;
155 guint value;
156};
157
158/* Miscellaneous utility functions
159 */
160GLIB_AVAILABLE_IN_ALL
161guint g_parse_debug_string (const gchar *string,
162 const GDebugKey *keys,
163 guint nkeys);
164
165GLIB_AVAILABLE_IN_ALL
166gint g_snprintf (gchar *string,
167 gulong n,
168 gchar const *format,
169 ...) G_GNUC_PRINTF (3, 4);
170GLIB_AVAILABLE_IN_ALL
171gint g_vsnprintf (gchar *string,
172 gulong n,
173 gchar const *format,
174 va_list args)
175 G_GNUC_PRINTF(3, 0);
176
177GLIB_AVAILABLE_IN_ALL
178void g_nullify_pointer (gpointer *nullify_location);
179
180typedef enum
181{
182 G_FORMAT_SIZE_DEFAULT = 0,
183 G_FORMAT_SIZE_LONG_FORMAT = 1 << 0,
184 G_FORMAT_SIZE_IEC_UNITS = 1 << 1
185} GFormatSizeFlags;
186
187GLIB_AVAILABLE_IN_2_30
188gchar *g_format_size_full (guint64 size,
189 GFormatSizeFlags flags);
190GLIB_AVAILABLE_IN_2_30
191gchar *g_format_size (guint64 size);
192
193GLIB_DEPRECATED_FOR(g_format_size)
194gchar *g_format_size_for_display (goffset size);
195
196#ifndef G_DISABLE_DEPRECATED
197/**
198 * GVoidFunc:
199 *
200 * Declares a type of function which takes no arguments
201 * and has no return value. It is used to specify the type
202 * function passed to g_atexit().
203 */
204typedef void (*GVoidFunc) (void);
205#define ATEXIT(proc) g_ATEXIT(proc)
206GLIB_DEPRECATED
207void g_atexit (GVoidFunc func);
208
209#ifdef G_OS_WIN32
210/* It's a bad idea to wrap atexit() on Windows. If the GLib DLL calls
211 * atexit(), the function will be called when the GLib DLL is detached
212 * from the program, which is not what the caller wants. The caller
213 * wants the function to be called when it *itself* exits (or is
214 * detached, in case the caller, too, is a DLL).
215 */
216#if (defined(__MINGW_H) && !defined(_STDLIB_H_)) || (defined(_MSC_VER) && !defined(_INC_STDLIB))
217int atexit (void (*)(void));
218#endif
219#define g_atexit(func) atexit(func)
220#endif
221
222#endif
223
224
225/* Look for an executable in PATH, following execvp() rules */
226GLIB_AVAILABLE_IN_ALL
227gchar* g_find_program_in_path (const gchar *program);
228
229/* Bit tests
230 *
231 * These are defined in a convoluted way because we want the compiler to
232 * be able to inline the code for performance reasons, but for
233 * historical reasons, we must continue to provide non-inline versions
234 * on our ABI.
235 *
236 * We define these as functions in gutils.c which are just implemented
237 * as calls to the _impl() versions in order to preserve the ABI.
238 */
239
240#define g_bit_nth_lsf(mask, nth_bit) g_bit_nth_lsf_impl(mask, nth_bit)
241#define g_bit_nth_msf(mask, nth_bit) g_bit_nth_msf_impl(mask, nth_bit)
242#define g_bit_storage(number) g_bit_storage_impl(number)
243
244GLIB_AVAILABLE_IN_ALL
245gint (g_bit_nth_lsf) (gulong mask,
246 gint nth_bit);
247GLIB_AVAILABLE_IN_ALL
248gint (g_bit_nth_msf) (gulong mask,
249 gint nth_bit);
250GLIB_AVAILABLE_IN_ALL
251guint (g_bit_storage) (gulong number);
252
253static inline gint
254g_bit_nth_lsf_impl (gulong mask,
255 gint nth_bit)
256{
257 if (G_UNLIKELY (nth_bit < -1))
258 nth_bit = -1;
259 while (nth_bit < ((GLIB_SIZEOF_LONG * 8) - 1))
260 {
261 nth_bit++;
262 if (mask & (1UL << nth_bit))
263 return nth_bit;
264 }
265 return -1;
266}
267
268static inline gint
269g_bit_nth_msf_impl (gulong mask,
270 gint nth_bit)
271{
272 if (nth_bit < 0 || G_UNLIKELY (nth_bit > GLIB_SIZEOF_LONG * 8))
273 nth_bit = GLIB_SIZEOF_LONG * 8;
274 while (nth_bit > 0)
275 {
276 nth_bit--;
277 if (mask & (1UL << nth_bit))
278 return nth_bit;
279 }
280 return -1;
281}
282
283static inline guint
284g_bit_storage_impl (gulong number)
285{
286#if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
287 return G_LIKELY (number) ?
288 ((GLIB_SIZEOF_LONG * 8U - 1) ^ (guint) __builtin_clzl(number)) + 1 : 1;
289#else
290 guint n_bits = 0;
291
292 do
293 {
294 n_bits++;
295 number >>= 1;
296 }
297 while (number);
298 return n_bits;
299#endif
300}
301
302#ifndef G_DISABLE_DEPRECATED
303
304/*
305 * This macro is deprecated. This DllMain() is too complex. It is
306 * recommended to write an explicit minimal DLlMain() that just saves
307 * the handle to the DLL and then use that handle instead, for
308 * instance passing it to
309 * g_win32_get_package_installation_directory_of_module().
310 *
311 * On Windows, this macro defines a DllMain function that stores the
312 * actual DLL name that the code being compiled will be included in.
313 * STATIC should be empty or 'static'. DLL_NAME is the name of the
314 * (pointer to the) char array where the DLL name will be stored. If
315 * this is used, you must also include <windows.h>. If you need a more complex
316 * DLL entry point function, you cannot use this.
317 *
318 * On non-Windows platforms, expands to nothing.
319 */
320
321#ifndef G_PLATFORM_WIN32
322# define G_WIN32_DLLMAIN_FOR_DLL_NAME(static, dll_name)
323#else
324# define G_WIN32_DLLMAIN_FOR_DLL_NAME(static, dll_name) \
325static char *dll_name; \
326 \
327BOOL WINAPI \
328DllMain (HINSTANCE hinstDLL, \
329 DWORD fdwReason, \
330 LPVOID lpvReserved) \
331{ \
332 wchar_t wcbfr[1000]; \
333 char *tem; \
334 switch (fdwReason) \
335 { \
336 case DLL_PROCESS_ATTACH: \
337 GetModuleFileNameW ((HMODULE) hinstDLL, wcbfr, G_N_ELEMENTS (wcbfr)); \
338 tem = g_utf16_to_utf8 (wcbfr, -1, NULL, NULL, NULL); \
339 dll_name = g_path_get_basename (tem); \
340 g_free (tem); \
341 break; \
342 } \
343 \
344 return TRUE; \
345}
346
347#endif /* !G_DISABLE_DEPRECATED */
348
349#endif /* G_PLATFORM_WIN32 */
350
351G_END_DECLS
352
353#endif /* __G_UTILS_H__ */
354