1 | /* GLIB - Library of useful routines for C programming |
2 | * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
3 | * |
4 | * SPDX-License-Identifier: LGPL-2.1-or-later |
5 | * |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2.1 of the License, or (at your option) any later version. |
10 | * |
11 | * This library is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * Lesser General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Lesser General Public |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
18 | */ |
19 | |
20 | /* |
21 | * Modified by the GLib Team and others 1997-2000. See the AUTHORS |
22 | * file for a list of people on the GLib Team. See the ChangeLog |
23 | * files for a list of changes. These files are distributed with |
24 | * GLib at ftp://ftp.gtk.org/pub/gtk/. |
25 | */ |
26 | |
27 | #ifndef __G_TYPES_H__ |
28 | #define __G_TYPES_H__ |
29 | |
30 | #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) |
31 | #error "Only <glib.h> can be included directly." |
32 | #endif |
33 | |
34 | #include <glibconfig.h> |
35 | #include <glib/gmacros.h> |
36 | #include <glib/gversionmacros.h> |
37 | |
38 | /* Must be included after the 3 headers above */ |
39 | #include <glib/glib-visibility.h> |
40 | |
41 | #include <time.h> |
42 | |
43 | G_BEGIN_DECLS |
44 | |
45 | /* Provide type definitions for commonly used types. |
46 | * These are useful because a "gint8" can be adjusted |
47 | * to be 1 byte (8 bits) on all platforms. Similarly and |
48 | * more importantly, "gint32" can be adjusted to be |
49 | * 4 bytes (32 bits) on all platforms. |
50 | */ |
51 | |
52 | typedef char gchar; |
53 | typedef short gshort; |
54 | typedef long glong; |
55 | typedef int gint; |
56 | typedef gint gboolean; |
57 | |
58 | typedef unsigned char guchar; |
59 | typedef unsigned short gushort; |
60 | typedef unsigned long gulong; |
61 | typedef unsigned int guint; |
62 | |
63 | typedef float gfloat; |
64 | typedef double gdouble; |
65 | |
66 | /* Define min and max constants for the fixed size numerical types */ |
67 | /** |
68 | * G_MININT8: (value -128) |
69 | * |
70 | * The minimum value which can be held in a #gint8. |
71 | * |
72 | * Since: 2.4 |
73 | */ |
74 | #define G_MININT8 ((gint8) (-G_MAXINT8 - 1)) |
75 | #define G_MAXINT8 ((gint8) 0x7f) |
76 | #define G_MAXUINT8 ((guint8) 0xff) |
77 | |
78 | /** |
79 | * G_MININT16: (value -32768) |
80 | * |
81 | * The minimum value which can be held in a #gint16. |
82 | * |
83 | * Since: 2.4 |
84 | */ |
85 | #define G_MININT16 ((gint16) (-G_MAXINT16 - 1)) |
86 | #define G_MAXINT16 ((gint16) 0x7fff) |
87 | #define G_MAXUINT16 ((guint16) 0xffff) |
88 | |
89 | /** |
90 | * G_MININT32: (value -2147483648) |
91 | * |
92 | * The minimum value which can be held in a #gint32. |
93 | * |
94 | * Since: 2.4 |
95 | */ |
96 | #define G_MININT32 ((gint32) (-G_MAXINT32 - 1)) |
97 | #define G_MAXINT32 ((gint32) 0x7fffffff) |
98 | #define G_MAXUINT32 ((guint32) 0xffffffff) |
99 | |
100 | /** |
101 | * G_MININT64: (value -9223372036854775808) |
102 | * |
103 | * The minimum value which can be held in a #gint64. |
104 | */ |
105 | #define G_MININT64 ((gint64) (-G_MAXINT64 - G_GINT64_CONSTANT(1))) |
106 | #define G_MAXINT64 G_GINT64_CONSTANT(0x7fffffffffffffff) |
107 | #define G_MAXUINT64 G_GUINT64_CONSTANT(0xffffffffffffffff) |
108 | |
109 | typedef void* gpointer; |
110 | typedef const void *gconstpointer; |
111 | |
112 | typedef gint (*GCompareFunc) (gconstpointer a, |
113 | gconstpointer b); |
114 | typedef gint (*GCompareDataFunc) (gconstpointer a, |
115 | gconstpointer b, |
116 | gpointer user_data); |
117 | typedef gboolean (*GEqualFunc) (gconstpointer a, |
118 | gconstpointer b); |
119 | |
120 | /** |
121 | * GEqualFuncFull: |
122 | * @a: a value |
123 | * @b: a value to compare with |
124 | * @user_data: user data provided by the caller |
125 | * |
126 | * Specifies the type of a function used to test two values for |
127 | * equality. The function should return %TRUE if both values are equal |
128 | * and %FALSE otherwise. |
129 | * |
130 | * This is a version of #GEqualFunc which provides a @user_data closure from |
131 | * the caller. |
132 | * |
133 | * Returns: %TRUE if @a = @b; %FALSE otherwise |
134 | * Since: 2.74 |
135 | */ |
136 | typedef gboolean (*GEqualFuncFull) (gconstpointer a, |
137 | gconstpointer b, |
138 | gpointer user_data); |
139 | |
140 | typedef void (*GDestroyNotify) (gpointer data); |
141 | typedef void (*GFunc) (gpointer data, |
142 | gpointer user_data); |
143 | typedef guint (*GHashFunc) (gconstpointer key); |
144 | typedef void (*GHFunc) (gpointer key, |
145 | gpointer value, |
146 | gpointer user_data); |
147 | |
148 | /** |
149 | * GCopyFunc: |
150 | * @src: (not nullable): A pointer to the data which should be copied |
151 | * @data: Additional data |
152 | * |
153 | * A function of this signature is used to copy the node data |
154 | * when doing a deep-copy of a tree. |
155 | * |
156 | * Returns: (not nullable): A pointer to the copy |
157 | * |
158 | * Since: 2.4 |
159 | */ |
160 | typedef gpointer (*GCopyFunc) (gconstpointer src, |
161 | gpointer data); |
162 | /** |
163 | * GFreeFunc: |
164 | * @data: a data pointer |
165 | * |
166 | * Declares a type of function which takes an arbitrary |
167 | * data pointer argument and has no return value. It is |
168 | * not currently used in GLib or GTK. |
169 | */ |
170 | typedef void (*GFreeFunc) (gpointer data); |
171 | |
172 | /** |
173 | * GTranslateFunc: |
174 | * @str: the untranslated string |
175 | * @data: user data specified when installing the function, e.g. |
176 | * in g_option_group_set_translate_func() |
177 | * |
178 | * The type of functions which are used to translate user-visible |
179 | * strings, for <option>--help</option> output. |
180 | * |
181 | * Returns: a translation of the string for the current locale. |
182 | * The returned string is owned by GLib and must not be freed. |
183 | */ |
184 | typedef const gchar * (*GTranslateFunc) (const gchar *str, |
185 | gpointer data); |
186 | |
187 | |
188 | /* Define some mathematical constants that aren't available |
189 | * symbolically in some strict ISO C implementations. |
190 | * |
191 | * Note that the large number of digits used in these definitions |
192 | * doesn't imply that GLib or current computers in general would be |
193 | * able to handle floating point numbers with an accuracy like this. |
194 | * It's mostly an exercise in futility and future proofing. For |
195 | * extended precision floating point support, look somewhere else |
196 | * than GLib. |
197 | */ |
198 | #define G_E 2.7182818284590452353602874713526624977572470937000 |
199 | #define G_LN2 0.69314718055994530941723212145817656807550013436026 |
200 | #define G_LN10 2.3025850929940456840179914546843642076011014886288 |
201 | #define G_PI 3.1415926535897932384626433832795028841971693993751 |
202 | #define G_PI_2 1.5707963267948966192313216916397514420985846996876 |
203 | #define G_PI_4 0.78539816339744830961566084581987572104929234984378 |
204 | #define G_SQRT2 1.4142135623730950488016887242096980785696718753769 |
205 | |
206 | /* Portable endian checks and conversions |
207 | * |
208 | * glibconfig.h defines G_BYTE_ORDER which expands to one of |
209 | * the below macros. |
210 | */ |
211 | #define G_LITTLE_ENDIAN 1234 |
212 | #define G_BIG_ENDIAN 4321 |
213 | #define G_PDP_ENDIAN 3412 /* unused, need specific PDP check */ |
214 | |
215 | |
216 | /* Basic bit swapping functions |
217 | */ |
218 | #define GUINT16_SWAP_LE_BE_CONSTANT(val) ((guint16) ( \ |
219 | (guint16) ((guint16) (val) >> 8) | \ |
220 | (guint16) ((guint16) (val) << 8))) |
221 | |
222 | #define GUINT32_SWAP_LE_BE_CONSTANT(val) ((guint32) ( \ |
223 | (((guint32) (val) & (guint32) 0x000000ffU) << 24) | \ |
224 | (((guint32) (val) & (guint32) 0x0000ff00U) << 8) | \ |
225 | (((guint32) (val) & (guint32) 0x00ff0000U) >> 8) | \ |
226 | (((guint32) (val) & (guint32) 0xff000000U) >> 24))) |
227 | |
228 | #define GUINT64_SWAP_LE_BE_CONSTANT(val) ((guint64) ( \ |
229 | (((guint64) (val) & \ |
230 | (guint64) G_GINT64_CONSTANT (0x00000000000000ffU)) << 56) | \ |
231 | (((guint64) (val) & \ |
232 | (guint64) G_GINT64_CONSTANT (0x000000000000ff00U)) << 40) | \ |
233 | (((guint64) (val) & \ |
234 | (guint64) G_GINT64_CONSTANT (0x0000000000ff0000U)) << 24) | \ |
235 | (((guint64) (val) & \ |
236 | (guint64) G_GINT64_CONSTANT (0x00000000ff000000U)) << 8) | \ |
237 | (((guint64) (val) & \ |
238 | (guint64) G_GINT64_CONSTANT (0x000000ff00000000U)) >> 8) | \ |
239 | (((guint64) (val) & \ |
240 | (guint64) G_GINT64_CONSTANT (0x0000ff0000000000U)) >> 24) | \ |
241 | (((guint64) (val) & \ |
242 | (guint64) G_GINT64_CONSTANT (0x00ff000000000000U)) >> 40) | \ |
243 | (((guint64) (val) & \ |
244 | (guint64) G_GINT64_CONSTANT (0xff00000000000000U)) >> 56))) |
245 | |
246 | /* Arch specific stuff for speed |
247 | */ |
248 | #if defined (__GNUC__) && (__GNUC__ >= 2) && defined (__OPTIMIZE__) |
249 | |
250 | # if __GNUC__ >= 4 && defined (__GNUC_MINOR__) && __GNUC_MINOR__ >= 3 |
251 | # define GUINT32_SWAP_LE_BE(val) ((guint32) __builtin_bswap32 ((guint32) (val))) |
252 | # define GUINT64_SWAP_LE_BE(val) ((guint64) __builtin_bswap64 ((guint64) (val))) |
253 | # endif |
254 | |
255 | # if defined (__i386__) |
256 | # define GUINT16_SWAP_LE_BE_IA32(val) \ |
257 | (G_GNUC_EXTENSION \ |
258 | ({ guint16 __v, __x = ((guint16) (val)); \ |
259 | if (__builtin_constant_p (__x)) \ |
260 | __v = GUINT16_SWAP_LE_BE_CONSTANT (__x); \ |
261 | else \ |
262 | __asm__ ("rorw $8, %w0" \ |
263 | : "=r" (__v) \ |
264 | : "0" (__x) \ |
265 | : "cc"); \ |
266 | __v; })) |
267 | # if !defined (__i486__) && !defined (__i586__) \ |
268 | && !defined (__pentium__) && !defined (__i686__) \ |
269 | && !defined (__pentiumpro__) && !defined (__pentium4__) |
270 | # define GUINT32_SWAP_LE_BE_IA32(val) \ |
271 | (G_GNUC_EXTENSION \ |
272 | ({ guint32 __v, __x = ((guint32) (val)); \ |
273 | if (__builtin_constant_p (__x)) \ |
274 | __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \ |
275 | else \ |
276 | __asm__ ("rorw $8, %w0\n\t" \ |
277 | "rorl $16, %0\n\t" \ |
278 | "rorw $8, %w0" \ |
279 | : "=r" (__v) \ |
280 | : "0" (__x) \ |
281 | : "cc"); \ |
282 | __v; })) |
283 | # else /* 486 and higher has bswap */ |
284 | # define GUINT32_SWAP_LE_BE_IA32(val) \ |
285 | (G_GNUC_EXTENSION \ |
286 | ({ guint32 __v, __x = ((guint32) (val)); \ |
287 | if (__builtin_constant_p (__x)) \ |
288 | __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \ |
289 | else \ |
290 | __asm__ ("bswap %0" \ |
291 | : "=r" (__v) \ |
292 | : "0" (__x)); \ |
293 | __v; })) |
294 | # endif /* processor specific 32-bit stuff */ |
295 | # define GUINT64_SWAP_LE_BE_IA32(val) \ |
296 | (G_GNUC_EXTENSION \ |
297 | ({ union { guint64 __ll; \ |
298 | guint32 __l[2]; } __w, __r; \ |
299 | __w.__ll = ((guint64) (val)); \ |
300 | if (__builtin_constant_p (__w.__ll)) \ |
301 | __r.__ll = GUINT64_SWAP_LE_BE_CONSTANT (__w.__ll); \ |
302 | else \ |
303 | { \ |
304 | __r.__l[0] = GUINT32_SWAP_LE_BE (__w.__l[1]); \ |
305 | __r.__l[1] = GUINT32_SWAP_LE_BE (__w.__l[0]); \ |
306 | } \ |
307 | __r.__ll; })) |
308 | /* Possibly just use the constant version and let gcc figure it out? */ |
309 | # define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_IA32 (val)) |
310 | # ifndef GUINT32_SWAP_LE_BE |
311 | # define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_IA32 (val)) |
312 | # endif |
313 | # ifndef GUINT64_SWAP_LE_BE |
314 | # define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_IA32 (val)) |
315 | # endif |
316 | # elif defined (__ia64__) |
317 | # define GUINT16_SWAP_LE_BE_IA64(val) \ |
318 | (G_GNUC_EXTENSION \ |
319 | ({ guint16 __v, __x = ((guint16) (val)); \ |
320 | if (__builtin_constant_p (__x)) \ |
321 | __v = GUINT16_SWAP_LE_BE_CONSTANT (__x); \ |
322 | else \ |
323 | __asm__ __volatile__ ("shl %0 = %1, 48 ;;" \ |
324 | "mux1 %0 = %0, @rev ;;" \ |
325 | : "=r" (__v) \ |
326 | : "r" (__x)); \ |
327 | __v; })) |
328 | # define GUINT32_SWAP_LE_BE_IA64(val) \ |
329 | (G_GNUC_EXTENSION \ |
330 | ({ guint32 __v, __x = ((guint32) (val)); \ |
331 | if (__builtin_constant_p (__x)) \ |
332 | __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \ |
333 | else \ |
334 | __asm__ __volatile__ ("shl %0 = %1, 32 ;;" \ |
335 | "mux1 %0 = %0, @rev ;;" \ |
336 | : "=r" (__v) \ |
337 | : "r" (__x)); \ |
338 | __v; })) |
339 | # define GUINT64_SWAP_LE_BE_IA64(val) \ |
340 | (G_GNUC_EXTENSION \ |
341 | ({ guint64 __v, __x = ((guint64) (val)); \ |
342 | if (__builtin_constant_p (__x)) \ |
343 | __v = GUINT64_SWAP_LE_BE_CONSTANT (__x); \ |
344 | else \ |
345 | __asm__ __volatile__ ("mux1 %0 = %1, @rev ;;" \ |
346 | : "=r" (__v) \ |
347 | : "r" (__x)); \ |
348 | __v; })) |
349 | # define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_IA64 (val)) |
350 | # ifndef GUINT32_SWAP_LE_BE |
351 | # define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_IA64 (val)) |
352 | # endif |
353 | # ifndef GUINT64_SWAP_LE_BE |
354 | # define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_IA64 (val)) |
355 | # endif |
356 | # elif defined (__x86_64__) |
357 | # define GUINT32_SWAP_LE_BE_X86_64(val) \ |
358 | (G_GNUC_EXTENSION \ |
359 | ({ guint32 __v, __x = ((guint32) (val)); \ |
360 | if (__builtin_constant_p (__x)) \ |
361 | __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \ |
362 | else \ |
363 | __asm__ ("bswapl %0" \ |
364 | : "=r" (__v) \ |
365 | : "0" (__x)); \ |
366 | __v; })) |
367 | # define GUINT64_SWAP_LE_BE_X86_64(val) \ |
368 | (G_GNUC_EXTENSION \ |
369 | ({ guint64 __v, __x = ((guint64) (val)); \ |
370 | if (__builtin_constant_p (__x)) \ |
371 | __v = GUINT64_SWAP_LE_BE_CONSTANT (__x); \ |
372 | else \ |
373 | __asm__ ("bswapq %0" \ |
374 | : "=r" (__v) \ |
375 | : "0" (__x)); \ |
376 | __v; })) |
377 | /* gcc seems to figure out optimal code for this on its own */ |
378 | # define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val)) |
379 | # ifndef GUINT32_SWAP_LE_BE |
380 | # define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_X86_64 (val)) |
381 | # endif |
382 | # ifndef GUINT64_SWAP_LE_BE |
383 | # define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_X86_64 (val)) |
384 | # endif |
385 | # else /* generic gcc */ |
386 | # define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val)) |
387 | # ifndef GUINT32_SWAP_LE_BE |
388 | # define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_CONSTANT (val)) |
389 | # endif |
390 | # ifndef GUINT64_SWAP_LE_BE |
391 | # define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_CONSTANT (val)) |
392 | # endif |
393 | # endif |
394 | #else /* generic */ |
395 | # define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val)) |
396 | # define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_CONSTANT (val)) |
397 | # define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_CONSTANT (val)) |
398 | #endif /* generic */ |
399 | |
400 | #define GUINT16_SWAP_LE_PDP(val) ((guint16) (val)) |
401 | #define GUINT16_SWAP_BE_PDP(val) (GUINT16_SWAP_LE_BE (val)) |
402 | #define GUINT32_SWAP_LE_PDP(val) ((guint32) ( \ |
403 | (((guint32) (val) & (guint32) 0x0000ffffU) << 16) | \ |
404 | (((guint32) (val) & (guint32) 0xffff0000U) >> 16))) |
405 | #define GUINT32_SWAP_BE_PDP(val) ((guint32) ( \ |
406 | (((guint32) (val) & (guint32) 0x00ff00ffU) << 8) | \ |
407 | (((guint32) (val) & (guint32) 0xff00ff00U) >> 8))) |
408 | |
409 | /* The G*_TO_?E() macros are defined in glibconfig.h. |
410 | * The transformation is symmetric, so the FROM just maps to the TO. |
411 | */ |
412 | #define GINT16_FROM_LE(val) (GINT16_TO_LE (val)) |
413 | #define GUINT16_FROM_LE(val) (GUINT16_TO_LE (val)) |
414 | #define GINT16_FROM_BE(val) (GINT16_TO_BE (val)) |
415 | #define GUINT16_FROM_BE(val) (GUINT16_TO_BE (val)) |
416 | #define GINT32_FROM_LE(val) (GINT32_TO_LE (val)) |
417 | #define GUINT32_FROM_LE(val) (GUINT32_TO_LE (val)) |
418 | #define GINT32_FROM_BE(val) (GINT32_TO_BE (val)) |
419 | #define GUINT32_FROM_BE(val) (GUINT32_TO_BE (val)) |
420 | |
421 | #define GINT64_FROM_LE(val) (GINT64_TO_LE (val)) |
422 | #define GUINT64_FROM_LE(val) (GUINT64_TO_LE (val)) |
423 | #define GINT64_FROM_BE(val) (GINT64_TO_BE (val)) |
424 | #define GUINT64_FROM_BE(val) (GUINT64_TO_BE (val)) |
425 | |
426 | #define GLONG_FROM_LE(val) (GLONG_TO_LE (val)) |
427 | #define GULONG_FROM_LE(val) (GULONG_TO_LE (val)) |
428 | #define GLONG_FROM_BE(val) (GLONG_TO_BE (val)) |
429 | #define GULONG_FROM_BE(val) (GULONG_TO_BE (val)) |
430 | |
431 | #define GINT_FROM_LE(val) (GINT_TO_LE (val)) |
432 | #define GUINT_FROM_LE(val) (GUINT_TO_LE (val)) |
433 | #define GINT_FROM_BE(val) (GINT_TO_BE (val)) |
434 | #define GUINT_FROM_BE(val) (GUINT_TO_BE (val)) |
435 | |
436 | #define GSIZE_FROM_LE(val) (GSIZE_TO_LE (val)) |
437 | #define GSSIZE_FROM_LE(val) (GSSIZE_TO_LE (val)) |
438 | #define GSIZE_FROM_BE(val) (GSIZE_TO_BE (val)) |
439 | #define GSSIZE_FROM_BE(val) (GSSIZE_TO_BE (val)) |
440 | |
441 | /* Portable versions of host-network order stuff |
442 | */ |
443 | #define g_ntohl(val) (GUINT32_FROM_BE (val)) |
444 | #define g_ntohs(val) (GUINT16_FROM_BE (val)) |
445 | #define g_htonl(val) (GUINT32_TO_BE (val)) |
446 | #define g_htons(val) (GUINT16_TO_BE (val)) |
447 | |
448 | /* Overflow-checked unsigned integer arithmetic |
449 | */ |
450 | #ifndef _GLIB_TEST_OVERFLOW_FALLBACK |
451 | /* https://bugzilla.gnome.org/show_bug.cgi?id=769104 */ |
452 | #if __GNUC__ >= 5 && !defined(__INTEL_COMPILER) |
453 | #define _GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS |
454 | #elif g_macro__has_builtin(__builtin_add_overflow) |
455 | #define _GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS |
456 | #endif |
457 | #endif |
458 | |
459 | #ifdef _GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS |
460 | |
461 | #define g_uint_checked_add(dest, a, b) \ |
462 | (!__builtin_add_overflow(a, b, dest)) |
463 | #define g_uint_checked_mul(dest, a, b) \ |
464 | (!__builtin_mul_overflow(a, b, dest)) |
465 | |
466 | #define g_uint64_checked_add(dest, a, b) \ |
467 | (!__builtin_add_overflow(a, b, dest)) |
468 | #define g_uint64_checked_mul(dest, a, b) \ |
469 | (!__builtin_mul_overflow(a, b, dest)) |
470 | |
471 | #define g_size_checked_add(dest, a, b) \ |
472 | (!__builtin_add_overflow(a, b, dest)) |
473 | #define g_size_checked_mul(dest, a, b) \ |
474 | (!__builtin_mul_overflow(a, b, dest)) |
475 | |
476 | #else /* !_GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS */ |
477 | |
478 | /* The names of the following inlines are private. Use the macro |
479 | * definitions above. |
480 | */ |
481 | static inline gboolean _GLIB_CHECKED_ADD_UINT (guint *dest, guint a, guint b) { |
482 | *dest = a + b; return *dest >= a; } |
483 | static inline gboolean _GLIB_CHECKED_MUL_UINT (guint *dest, guint a, guint b) { |
484 | *dest = a * b; return !a || *dest / a == b; } |
485 | static inline gboolean _GLIB_CHECKED_ADD_UINT64 (guint64 *dest, guint64 a, guint64 b) { |
486 | *dest = a + b; return *dest >= a; } |
487 | static inline gboolean _GLIB_CHECKED_MUL_UINT64 (guint64 *dest, guint64 a, guint64 b) { |
488 | *dest = a * b; return !a || *dest / a == b; } |
489 | static inline gboolean _GLIB_CHECKED_ADD_SIZE (gsize *dest, gsize a, gsize b) { |
490 | *dest = a + b; return *dest >= a; } |
491 | static inline gboolean _GLIB_CHECKED_MUL_SIZE (gsize *dest, gsize a, gsize b) { |
492 | *dest = a * b; return !a || *dest / a == b; } |
493 | |
494 | #define g_uint_checked_add(dest, a, b) \ |
495 | _GLIB_CHECKED_ADD_UINT(dest, a, b) |
496 | #define g_uint_checked_mul(dest, a, b) \ |
497 | _GLIB_CHECKED_MUL_UINT(dest, a, b) |
498 | |
499 | #define g_uint64_checked_add(dest, a, b) \ |
500 | _GLIB_CHECKED_ADD_UINT64(dest, a, b) |
501 | #define g_uint64_checked_mul(dest, a, b) \ |
502 | _GLIB_CHECKED_MUL_UINT64(dest, a, b) |
503 | |
504 | #define g_size_checked_add(dest, a, b) \ |
505 | _GLIB_CHECKED_ADD_SIZE(dest, a, b) |
506 | #define g_size_checked_mul(dest, a, b) \ |
507 | _GLIB_CHECKED_MUL_SIZE(dest, a, b) |
508 | |
509 | #endif /* !_GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS */ |
510 | |
511 | /* IEEE Standard 754 Single Precision Storage Format (gfloat): |
512 | * |
513 | * 31 30 23 22 0 |
514 | * +--------+---------------+---------------+ |
515 | * | s 1bit | e[30:23] 8bit | f[22:0] 23bit | |
516 | * +--------+---------------+---------------+ |
517 | * B0------------------->B1------->B2-->B3--> |
518 | * |
519 | * IEEE Standard 754 Double Precision Storage Format (gdouble): |
520 | * |
521 | * 63 62 52 51 32 31 0 |
522 | * +--------+----------------+----------------+ +---------------+ |
523 | * | s 1bit | e[62:52] 11bit | f[51:32] 20bit | | f[31:0] 32bit | |
524 | * +--------+----------------+----------------+ +---------------+ |
525 | * B0--------------->B1---------->B2--->B3----> B4->B5->B6->B7-> |
526 | */ |
527 | /* subtract from biased_exponent to form base2 exponent (normal numbers) */ |
528 | typedef union _GDoubleIEEE754 GDoubleIEEE754; |
529 | typedef union _GFloatIEEE754 GFloatIEEE754; |
530 | #define G_IEEE754_FLOAT_BIAS (127) |
531 | #define G_IEEE754_DOUBLE_BIAS (1023) |
532 | /* multiply with base2 exponent to get base10 exponent (normal numbers) */ |
533 | #define G_LOG_2_BASE_10 (0.30102999566398119521) |
534 | #if G_BYTE_ORDER == G_LITTLE_ENDIAN |
535 | union _GFloatIEEE754 |
536 | { |
537 | gfloat v_float; |
538 | struct { |
539 | guint mantissa : 23; |
540 | guint biased_exponent : 8; |
541 | guint sign : 1; |
542 | } mpn; |
543 | }; |
544 | union _GDoubleIEEE754 |
545 | { |
546 | gdouble v_double; |
547 | struct { |
548 | guint mantissa_low : 32; |
549 | guint mantissa_high : 20; |
550 | guint biased_exponent : 11; |
551 | guint sign : 1; |
552 | } mpn; |
553 | }; |
554 | #elif G_BYTE_ORDER == G_BIG_ENDIAN |
555 | union _GFloatIEEE754 |
556 | { |
557 | gfloat v_float; |
558 | struct { |
559 | guint sign : 1; |
560 | guint biased_exponent : 8; |
561 | guint mantissa : 23; |
562 | } mpn; |
563 | }; |
564 | union _GDoubleIEEE754 |
565 | { |
566 | gdouble v_double; |
567 | struct { |
568 | guint sign : 1; |
569 | guint biased_exponent : 11; |
570 | guint mantissa_high : 20; |
571 | guint mantissa_low : 32; |
572 | } mpn; |
573 | }; |
574 | #else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ |
575 | #error unknown ENDIAN type |
576 | #endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ |
577 | |
578 | typedef struct _GTimeVal GTimeVal GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); |
579 | |
580 | struct _GTimeVal |
581 | { |
582 | glong tv_sec; |
583 | glong tv_usec; |
584 | } GLIB_DEPRECATED_TYPE_IN_2_62_FOR(GDateTime); |
585 | |
586 | typedef gint grefcount; |
587 | typedef gint gatomicrefcount; /* should be accessed only using atomics */ |
588 | |
589 | G_END_DECLS |
590 | |
591 | #endif /* __G_TYPES_H__ */ |
592 | |