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_TYPES_H__
26#define __G_TYPES_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 <glibconfig.h>
33#include <glib/gmacros.h>
34#include <glib/gversionmacros.h>
35#include <time.h>
36
37G_BEGIN_DECLS
38
39/* Provide type definitions for commonly used types.
40 * These are useful because a "gint8" can be adjusted
41 * to be 1 byte (8 bits) on all platforms. Similarly and
42 * more importantly, "gint32" can be adjusted to be
43 * 4 bytes (32 bits) on all platforms.
44 */
45
46typedef char gchar;
47typedef short gshort;
48typedef long glong;
49typedef int gint;
50typedef gint gboolean;
51
52typedef unsigned char guchar;
53typedef unsigned short gushort;
54typedef unsigned long gulong;
55typedef unsigned int guint;
56
57typedef float gfloat;
58typedef double gdouble;
59
60/* Define min and max constants for the fixed size numerical types */
61#define G_MININT8 ((gint8) -0x80)
62#define G_MAXINT8 ((gint8) 0x7f)
63#define G_MAXUINT8 ((guint8) 0xff)
64
65#define G_MININT16 ((gint16) -0x8000)
66#define G_MAXINT16 ((gint16) 0x7fff)
67#define G_MAXUINT16 ((guint16) 0xffff)
68
69#define G_MININT32 ((gint32) -0x80000000)
70#define G_MAXINT32 ((gint32) 0x7fffffff)
71#define G_MAXUINT32 ((guint32) 0xffffffff)
72
73#define G_MININT64 ((gint64) G_GINT64_CONSTANT(-0x8000000000000000))
74#define G_MAXINT64 G_GINT64_CONSTANT(0x7fffffffffffffff)
75#define G_MAXUINT64 G_GUINT64_CONSTANT(0xffffffffffffffff)
76
77typedef void* gpointer;
78typedef const void *gconstpointer;
79
80typedef gint (*GCompareFunc) (gconstpointer a,
81 gconstpointer b);
82typedef gint (*GCompareDataFunc) (gconstpointer a,
83 gconstpointer b,
84 gpointer user_data);
85typedef gboolean (*GEqualFunc) (gconstpointer a,
86 gconstpointer b);
87typedef void (*GDestroyNotify) (gpointer data);
88typedef void (*GFunc) (gpointer data,
89 gpointer user_data);
90typedef guint (*GHashFunc) (gconstpointer key);
91typedef void (*GHFunc) (gpointer key,
92 gpointer value,
93 gpointer user_data);
94
95/**
96 * GFreeFunc:
97 * @data: a data pointer
98 *
99 * Declares a type of function which takes an arbitrary
100 * data pointer argument and has no return value. It is
101 * not currently used in GLib or GTK+.
102 */
103typedef void (*GFreeFunc) (gpointer data);
104
105/**
106 * GTranslateFunc:
107 * @str: the untranslated string
108 * @data: user data specified when installing the function, e.g.
109 * in g_option_group_set_translate_func()
110 *
111 * The type of functions which are used to translate user-visible
112 * strings, for <option>--help</option> output.
113 *
114 * Returns: a translation of the string for the current locale.
115 * The returned string is owned by GLib and must not be freed.
116 */
117typedef const gchar * (*GTranslateFunc) (const gchar *str,
118 gpointer data);
119
120
121/* Define some mathematical constants that aren't available
122 * symbolically in some strict ISO C implementations.
123 *
124 * Note that the large number of digits used in these definitions
125 * doesn't imply that GLib or current computers in general would be
126 * able to handle floating point numbers with an accuracy like this.
127 * It's mostly an exercise in futility and future proofing. For
128 * extended precision floating point support, look somewhere else
129 * than GLib.
130 */
131#define G_E 2.7182818284590452353602874713526624977572470937000
132#define G_LN2 0.69314718055994530941723212145817656807550013436026
133#define G_LN10 2.3025850929940456840179914546843642076011014886288
134#define G_PI 3.1415926535897932384626433832795028841971693993751
135#define G_PI_2 1.5707963267948966192313216916397514420985846996876
136#define G_PI_4 0.78539816339744830961566084581987572104929234984378
137#define G_SQRT2 1.4142135623730950488016887242096980785696718753769
138
139/* Portable endian checks and conversions
140 *
141 * glibconfig.h defines G_BYTE_ORDER which expands to one of
142 * the below macros.
143 */
144#define G_LITTLE_ENDIAN 1234
145#define G_BIG_ENDIAN 4321
146#define G_PDP_ENDIAN 3412 /* unused, need specific PDP check */
147
148
149/* Basic bit swapping functions
150 */
151#define GUINT16_SWAP_LE_BE_CONSTANT(val) ((guint16) ( \
152 (guint16) ((guint16) (val) >> 8) | \
153 (guint16) ((guint16) (val) << 8)))
154
155#define GUINT32_SWAP_LE_BE_CONSTANT(val) ((guint32) ( \
156 (((guint32) (val) & (guint32) 0x000000ffU) << 24) | \
157 (((guint32) (val) & (guint32) 0x0000ff00U) << 8) | \
158 (((guint32) (val) & (guint32) 0x00ff0000U) >> 8) | \
159 (((guint32) (val) & (guint32) 0xff000000U) >> 24)))
160
161#define GUINT64_SWAP_LE_BE_CONSTANT(val) ((guint64) ( \
162 (((guint64) (val) & \
163 (guint64) G_GINT64_CONSTANT (0x00000000000000ffU)) << 56) | \
164 (((guint64) (val) & \
165 (guint64) G_GINT64_CONSTANT (0x000000000000ff00U)) << 40) | \
166 (((guint64) (val) & \
167 (guint64) G_GINT64_CONSTANT (0x0000000000ff0000U)) << 24) | \
168 (((guint64) (val) & \
169 (guint64) G_GINT64_CONSTANT (0x00000000ff000000U)) << 8) | \
170 (((guint64) (val) & \
171 (guint64) G_GINT64_CONSTANT (0x000000ff00000000U)) >> 8) | \
172 (((guint64) (val) & \
173 (guint64) G_GINT64_CONSTANT (0x0000ff0000000000U)) >> 24) | \
174 (((guint64) (val) & \
175 (guint64) G_GINT64_CONSTANT (0x00ff000000000000U)) >> 40) | \
176 (((guint64) (val) & \
177 (guint64) G_GINT64_CONSTANT (0xff00000000000000U)) >> 56)))
178
179/* Arch specific stuff for speed
180 */
181#if defined (__GNUC__) && (__GNUC__ >= 2) && defined (__OPTIMIZE__)
182
183# if __GNUC__ >= 4 && defined (__GNUC_MINOR__) && __GNUC_MINOR__ >= 3
184# define GUINT32_SWAP_LE_BE(val) ((guint32) __builtin_bswap32 ((gint32) (val)))
185# define GUINT64_SWAP_LE_BE(val) ((guint64) __builtin_bswap64 ((gint64) (val)))
186# endif
187
188# if defined (__i386__)
189# define GUINT16_SWAP_LE_BE_IA32(val) \
190 (G_GNUC_EXTENSION \
191 ({ guint16 __v, __x = ((guint16) (val)); \
192 if (__builtin_constant_p (__x)) \
193 __v = GUINT16_SWAP_LE_BE_CONSTANT (__x); \
194 else \
195 __asm__ ("rorw $8, %w0" \
196 : "=r" (__v) \
197 : "0" (__x) \
198 : "cc"); \
199 __v; }))
200# if !defined (__i486__) && !defined (__i586__) \
201 && !defined (__pentium__) && !defined (__i686__) \
202 && !defined (__pentiumpro__) && !defined (__pentium4__)
203# define GUINT32_SWAP_LE_BE_IA32(val) \
204 (G_GNUC_EXTENSION \
205 ({ guint32 __v, __x = ((guint32) (val)); \
206 if (__builtin_constant_p (__x)) \
207 __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \
208 else \
209 __asm__ ("rorw $8, %w0\n\t" \
210 "rorl $16, %0\n\t" \
211 "rorw $8, %w0" \
212 : "=r" (__v) \
213 : "0" (__x) \
214 : "cc"); \
215 __v; }))
216# else /* 486 and higher has bswap */
217# define GUINT32_SWAP_LE_BE_IA32(val) \
218 (G_GNUC_EXTENSION \
219 ({ guint32 __v, __x = ((guint32) (val)); \
220 if (__builtin_constant_p (__x)) \
221 __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \
222 else \
223 __asm__ ("bswap %0" \
224 : "=r" (__v) \
225 : "0" (__x)); \
226 __v; }))
227# endif /* processor specific 32-bit stuff */
228# define GUINT64_SWAP_LE_BE_IA32(val) \
229 (G_GNUC_EXTENSION \
230 ({ union { guint64 __ll; \
231 guint32 __l[2]; } __w, __r; \
232 __w.__ll = ((guint64) (val)); \
233 if (__builtin_constant_p (__w.__ll)) \
234 __r.__ll = GUINT64_SWAP_LE_BE_CONSTANT (__w.__ll); \
235 else \
236 { \
237 __r.__l[0] = GUINT32_SWAP_LE_BE (__w.__l[1]); \
238 __r.__l[1] = GUINT32_SWAP_LE_BE (__w.__l[0]); \
239 } \
240 __r.__ll; }))
241 /* Possibly just use the constant version and let gcc figure it out? */
242# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_IA32 (val))
243# ifndef GUINT32_SWAP_LE_BE
244# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_IA32 (val))
245# endif
246# ifndef GUINT64_SWAP_LE_BE
247# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_IA32 (val))
248# endif
249# elif defined (__ia64__)
250# define GUINT16_SWAP_LE_BE_IA64(val) \
251 (G_GNUC_EXTENSION \
252 ({ guint16 __v, __x = ((guint16) (val)); \
253 if (__builtin_constant_p (__x)) \
254 __v = GUINT16_SWAP_LE_BE_CONSTANT (__x); \
255 else \
256 __asm__ __volatile__ ("shl %0 = %1, 48 ;;" \
257 "mux1 %0 = %0, @rev ;;" \
258 : "=r" (__v) \
259 : "r" (__x)); \
260 __v; }))
261# define GUINT32_SWAP_LE_BE_IA64(val) \
262 (G_GNUC_EXTENSION \
263 ({ guint32 __v, __x = ((guint32) (val)); \
264 if (__builtin_constant_p (__x)) \
265 __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \
266 else \
267 __asm__ __volatile__ ("shl %0 = %1, 32 ;;" \
268 "mux1 %0 = %0, @rev ;;" \
269 : "=r" (__v) \
270 : "r" (__x)); \
271 __v; }))
272# define GUINT64_SWAP_LE_BE_IA64(val) \
273 (G_GNUC_EXTENSION \
274 ({ guint64 __v, __x = ((guint64) (val)); \
275 if (__builtin_constant_p (__x)) \
276 __v = GUINT64_SWAP_LE_BE_CONSTANT (__x); \
277 else \
278 __asm__ __volatile__ ("mux1 %0 = %1, @rev ;;" \
279 : "=r" (__v) \
280 : "r" (__x)); \
281 __v; }))
282# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_IA64 (val))
283# ifndef GUINT32_SWAP_LE_BE
284# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_IA64 (val))
285# endif
286# ifndef GUINT64_SWAP_LE_BE
287# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_IA64 (val))
288# endif
289# elif defined (__x86_64__)
290# define GUINT32_SWAP_LE_BE_X86_64(val) \
291 (G_GNUC_EXTENSION \
292 ({ guint32 __v, __x = ((guint32) (val)); \
293 if (__builtin_constant_p (__x)) \
294 __v = GUINT32_SWAP_LE_BE_CONSTANT (__x); \
295 else \
296 __asm__ ("bswapl %0" \
297 : "=r" (__v) \
298 : "0" (__x)); \
299 __v; }))
300# define GUINT64_SWAP_LE_BE_X86_64(val) \
301 (G_GNUC_EXTENSION \
302 ({ guint64 __v, __x = ((guint64) (val)); \
303 if (__builtin_constant_p (__x)) \
304 __v = GUINT64_SWAP_LE_BE_CONSTANT (__x); \
305 else \
306 __asm__ ("bswapq %0" \
307 : "=r" (__v) \
308 : "0" (__x)); \
309 __v; }))
310 /* gcc seems to figure out optimal code for this on its own */
311# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val))
312# ifndef GUINT32_SWAP_LE_BE
313# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_X86_64 (val))
314# endif
315# ifndef GUINT64_SWAP_LE_BE
316# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_X86_64 (val))
317# endif
318# else /* generic gcc */
319# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val))
320# ifndef GUINT32_SWAP_LE_BE
321# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_CONSTANT (val))
322# endif
323# ifndef GUINT64_SWAP_LE_BE
324# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_CONSTANT (val))
325# endif
326# endif
327#else /* generic */
328# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val))
329# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_CONSTANT (val))
330# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_CONSTANT (val))
331#endif /* generic */
332
333#define GUINT16_SWAP_LE_PDP(val) ((guint16) (val))
334#define GUINT16_SWAP_BE_PDP(val) (GUINT16_SWAP_LE_BE (val))
335#define GUINT32_SWAP_LE_PDP(val) ((guint32) ( \
336 (((guint32) (val) & (guint32) 0x0000ffffU) << 16) | \
337 (((guint32) (val) & (guint32) 0xffff0000U) >> 16)))
338#define GUINT32_SWAP_BE_PDP(val) ((guint32) ( \
339 (((guint32) (val) & (guint32) 0x00ff00ffU) << 8) | \
340 (((guint32) (val) & (guint32) 0xff00ff00U) >> 8)))
341
342/* The G*_TO_?E() macros are defined in glibconfig.h.
343 * The transformation is symmetric, so the FROM just maps to the TO.
344 */
345#define GINT16_FROM_LE(val) (GINT16_TO_LE (val))
346#define GUINT16_FROM_LE(val) (GUINT16_TO_LE (val))
347#define GINT16_FROM_BE(val) (GINT16_TO_BE (val))
348#define GUINT16_FROM_BE(val) (GUINT16_TO_BE (val))
349#define GINT32_FROM_LE(val) (GINT32_TO_LE (val))
350#define GUINT32_FROM_LE(val) (GUINT32_TO_LE (val))
351#define GINT32_FROM_BE(val) (GINT32_TO_BE (val))
352#define GUINT32_FROM_BE(val) (GUINT32_TO_BE (val))
353
354#define GINT64_FROM_LE(val) (GINT64_TO_LE (val))
355#define GUINT64_FROM_LE(val) (GUINT64_TO_LE (val))
356#define GINT64_FROM_BE(val) (GINT64_TO_BE (val))
357#define GUINT64_FROM_BE(val) (GUINT64_TO_BE (val))
358
359#define GLONG_FROM_LE(val) (GLONG_TO_LE (val))
360#define GULONG_FROM_LE(val) (GULONG_TO_LE (val))
361#define GLONG_FROM_BE(val) (GLONG_TO_BE (val))
362#define GULONG_FROM_BE(val) (GULONG_TO_BE (val))
363
364#define GINT_FROM_LE(val) (GINT_TO_LE (val))
365#define GUINT_FROM_LE(val) (GUINT_TO_LE (val))
366#define GINT_FROM_BE(val) (GINT_TO_BE (val))
367#define GUINT_FROM_BE(val) (GUINT_TO_BE (val))
368
369#define GSIZE_FROM_LE(val) (GSIZE_TO_LE (val))
370#define GSSIZE_FROM_LE(val) (GSSIZE_TO_LE (val))
371#define GSIZE_FROM_BE(val) (GSIZE_TO_BE (val))
372#define GSSIZE_FROM_BE(val) (GSSIZE_TO_BE (val))
373
374/* Portable versions of host-network order stuff
375 */
376#define g_ntohl(val) (GUINT32_FROM_BE (val))
377#define g_ntohs(val) (GUINT16_FROM_BE (val))
378#define g_htonl(val) (GUINT32_TO_BE (val))
379#define g_htons(val) (GUINT16_TO_BE (val))
380
381/* Overflow-checked unsigned integer arithmetic
382 */
383#ifndef _GLIB_TEST_OVERFLOW_FALLBACK
384#if __GNUC__ >= 5
385#define _GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS
386#elif __has_builtin(__builtin_uadd_overflow)
387#define _GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS
388#endif
389#endif
390
391#define g_uint_checked_add(dest, a, b) \
392 _GLIB_CHECKED_ADD_U32(dest, a, b)
393#define g_uint_checked_mul(dest, a, b) \
394 _GLIB_CHECKED_MUL_U32(dest, a, b)
395
396#define g_uint64_checked_add(dest, a, b) \
397 _GLIB_CHECKED_ADD_U64(dest, a, b)
398#define g_uint64_checked_mul(dest, a, b) \
399 _GLIB_CHECKED_MUL_U64(dest, a, b)
400
401#if GLIB_SIZEOF_SIZE_T == 8
402#define g_size_checked_add(dest, a, b) \
403 _GLIB_CHECKED_ADD_U64(dest, a, b)
404#define g_size_checked_mul(dest, a, b) \
405 _GLIB_CHECKED_MUL_U64(dest, a, b)
406#else
407#define g_size_checked_add(dest, a, b) \
408 _GLIB_CHECKED_ADD_U32(dest, a, b)
409#define g_size_checked_mul(dest, a, b) \
410 _GLIB_CHECKED_MUL_U32(dest, a, b)
411#endif
412
413/* The names of the following inlines are private. Use the macro
414 * definitions above.
415 */
416#ifdef _GLIB_HAVE_BUILTIN_OVERFLOW_CHECKS
417static inline gboolean _GLIB_CHECKED_ADD_U32 (guint32 *dest, guint32 a, guint32 b) {
418 return !__builtin_uadd_overflow(a, b, dest); }
419static inline gboolean _GLIB_CHECKED_MUL_U32 (guint32 *dest, guint32 a, guint32 b) {
420 return !__builtin_umul_overflow(a, b, dest); }
421static inline gboolean _GLIB_CHECKED_ADD_U64 (guint64 *dest, guint64 a, guint64 b) {
422 G_STATIC_ASSERT(sizeof (unsigned long long) == sizeof (guint64));
423 return !__builtin_uaddll_overflow(a, b, (unsigned long long *) dest); }
424static inline gboolean _GLIB_CHECKED_MUL_U64 (guint64 *dest, guint64 a, guint64 b) {
425 return !__builtin_umulll_overflow(a, b, (unsigned long long *) dest); }
426#else
427static inline gboolean _GLIB_CHECKED_ADD_U32 (guint32 *dest, guint32 a, guint32 b) {
428 *dest = a + b; return *dest >= a; }
429static inline gboolean _GLIB_CHECKED_MUL_U32 (guint32 *dest, guint32 a, guint32 b) {
430 *dest = a * b; return !a || *dest / a == b; }
431static inline gboolean _GLIB_CHECKED_ADD_U64 (guint64 *dest, guint64 a, guint64 b) {
432 *dest = a + b; return *dest >= a; }
433static inline gboolean _GLIB_CHECKED_MUL_U64 (guint64 *dest, guint64 a, guint64 b) {
434 *dest = a * b; return !a || *dest / a == b; }
435#endif
436
437/* IEEE Standard 754 Single Precision Storage Format (gfloat):
438 *
439 * 31 30 23 22 0
440 * +--------+---------------+---------------+
441 * | s 1bit | e[30:23] 8bit | f[22:0] 23bit |
442 * +--------+---------------+---------------+
443 * B0------------------->B1------->B2-->B3-->
444 *
445 * IEEE Standard 754 Double Precision Storage Format (gdouble):
446 *
447 * 63 62 52 51 32 31 0
448 * +--------+----------------+----------------+ +---------------+
449 * | s 1bit | e[62:52] 11bit | f[51:32] 20bit | | f[31:0] 32bit |
450 * +--------+----------------+----------------+ +---------------+
451 * B0--------------->B1---------->B2--->B3----> B4->B5->B6->B7->
452 */
453/* subtract from biased_exponent to form base2 exponent (normal numbers) */
454typedef union _GDoubleIEEE754 GDoubleIEEE754;
455typedef union _GFloatIEEE754 GFloatIEEE754;
456#define G_IEEE754_FLOAT_BIAS (127)
457#define G_IEEE754_DOUBLE_BIAS (1023)
458/* multiply with base2 exponent to get base10 exponent (normal numbers) */
459#define G_LOG_2_BASE_10 (0.30102999566398119521)
460#if G_BYTE_ORDER == G_LITTLE_ENDIAN
461union _GFloatIEEE754
462{
463 gfloat v_float;
464 struct {
465 guint mantissa : 23;
466 guint biased_exponent : 8;
467 guint sign : 1;
468 } mpn;
469};
470union _GDoubleIEEE754
471{
472 gdouble v_double;
473 struct {
474 guint mantissa_low : 32;
475 guint mantissa_high : 20;
476 guint biased_exponent : 11;
477 guint sign : 1;
478 } mpn;
479};
480#elif G_BYTE_ORDER == G_BIG_ENDIAN
481union _GFloatIEEE754
482{
483 gfloat v_float;
484 struct {
485 guint sign : 1;
486 guint biased_exponent : 8;
487 guint mantissa : 23;
488 } mpn;
489};
490union _GDoubleIEEE754
491{
492 gdouble v_double;
493 struct {
494 guint sign : 1;
495 guint biased_exponent : 11;
496 guint mantissa_high : 20;
497 guint mantissa_low : 32;
498 } mpn;
499};
500#else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
501#error unknown ENDIAN type
502#endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
503
504typedef struct _GTimeVal GTimeVal;
505
506struct _GTimeVal
507{
508 glong tv_sec;
509 glong tv_usec;
510};
511
512G_END_DECLS
513
514/* We prefix variable declarations so they can
515 * properly get exported in Windows DLLs.
516 */
517#ifndef GLIB_VAR
518# ifdef G_PLATFORM_WIN32
519# ifdef GLIB_STATIC_COMPILATION
520# define GLIB_VAR extern
521# else /* !GLIB_STATIC_COMPILATION */
522# ifdef GLIB_COMPILATION
523# ifdef DLL_EXPORT
524# define GLIB_VAR __declspec(dllexport)
525# else /* !DLL_EXPORT */
526# define GLIB_VAR extern
527# endif /* !DLL_EXPORT */
528# else /* !GLIB_COMPILATION */
529# define GLIB_VAR extern __declspec(dllimport)
530# endif /* !GLIB_COMPILATION */
531# endif /* !GLIB_STATIC_COMPILATION */
532# else /* !G_PLATFORM_WIN32 */
533# define GLIB_VAR _GLIB_EXTERN
534# endif /* !G_PLATFORM_WIN32 */
535#endif /* GLIB_VAR */
536
537#endif /* __G_TYPES_H__ */
538