2 * Copyright © 2007,2008,2009 Red Hat, Inc.
3 * Copyright © 2011 Google, Inc.
5 * This is part of HarfBuzz, a text shaping library.
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 * Red Hat Author(s): Behdad Esfahbod
26 * Google Author(s): Behdad Esfahbod
36 #include "hb-common.h"
42 /* We only use these two for debug output. However, the debug code is
43 * always seen by the compiler (and optimized out in non-debug builds.
44 * If including these becomes a problem, we can start thinking about
45 * someway around that. */
55 # define NULL ((void *) 0)
68 #define MIN(a,b) ((a) < (b) ? (a) : (b))
71 #define MAX(a,b) ((a) > (b) ? (a) : (b))
74 #define ARRAY_LENGTH(__array) ((signed int) (sizeof (__array) / sizeof (__array[0])))
76 #define HB_STMT_START do
77 #define HB_STMT_END while (0)
79 #define _ASSERT_STATIC1(_line, _cond) typedef int _static_assert_on_line_##_line##_failed[(_cond)?1:-1]
80 #define _ASSERT_STATIC0(_line, _cond) _ASSERT_STATIC1 (_line, (_cond))
81 #define ASSERT_STATIC(_cond) _ASSERT_STATIC0 (__LINE__, (_cond))
83 #define ASSERT_STATIC_EXPR(_cond) ((void) sizeof (char[(_cond) ? 1 : -1]))
86 /* Lets assert int types. Saves trouble down the road. */
88 ASSERT_STATIC (sizeof (int8_t) == 1);
89 ASSERT_STATIC (sizeof (uint8_t) == 1);
90 ASSERT_STATIC (sizeof (int16_t) == 2);
91 ASSERT_STATIC (sizeof (uint16_t) == 2);
92 ASSERT_STATIC (sizeof (int32_t) == 4);
93 ASSERT_STATIC (sizeof (uint32_t) == 4);
94 ASSERT_STATIC (sizeof (int64_t) == 8);
95 ASSERT_STATIC (sizeof (uint64_t) == 8);
97 ASSERT_STATIC (sizeof (hb_codepoint_t) == 4);
98 ASSERT_STATIC (sizeof (hb_position_t) == 4);
99 ASSERT_STATIC (sizeof (hb_mask_t) == 4);
100 ASSERT_STATIC (sizeof (hb_var_int_t) == 4);
105 #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
106 #define _HB_BOOLEAN_EXPR(expr) ((expr) ? 1 : 0)
107 #define likely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 1))
108 #define unlikely(expr) (__builtin_expect (_HB_BOOLEAN_EXPR(expr), 0))
110 #define likely(expr) (expr)
111 #define unlikely(expr) (expr)
116 #define __attribute__(x)
120 #define HB_PURE_FUNC __attribute__((pure))
121 #define HB_CONST_FUNC __attribute__((const))
124 #define HB_CONST_FUNC
127 #define HB_UNUSED __attribute__((unused))
133 # define HB_INTERNAL __attribute__((__visibility__("hidden")))
137 #if (defined(__WIN32__) && !defined(__WINE__)) || defined(_MSC_VER)
138 #define snprintf _snprintf
143 #define inline __inline
146 #ifdef __STRICT_ANSI__
148 #define inline __inline__
153 #define HB_FUNC __PRETTY_FUNCTION__
154 #elif defined(_MSC_VER)
155 #define HB_FUNC __FUNCSIG__
157 #define HB_FUNC __func__
161 /* Return the number of 1 bits in mask. */
162 static inline HB_CONST_FUNC unsigned int
163 _hb_popcount32 (uint32_t mask)
165 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
166 return __builtin_popcount (mask);
170 y = (mask >> 1) &033333333333;
171 y = mask - y - ((y >>1) & 033333333333);
172 return (((y + (y >> 3)) & 030707070707) % 077);
176 /* Returns the number of bits needed to store number */
177 static inline HB_CONST_FUNC unsigned int
178 _hb_bit_storage (unsigned int number)
180 #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
181 return likely (number) ? (sizeof (unsigned int) * 8 - __builtin_clz (number)) : 0;
183 register unsigned int n_bits = 0;
192 /* Returns the number of zero bits in the least significant side of number */
193 static inline HB_CONST_FUNC unsigned int
194 _hb_ctz (unsigned int number)
196 #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(__OPTIMIZE__)
197 return likely (number) ? __builtin_ctz (number) : 0;
199 register unsigned int n_bits = 0;
200 if (unlikely (!number)) return 0;
201 while (!(number & 1)) {
209 /* Type of bsearch() / qsort() compare function */
210 typedef int (*hb_compare_func_t) (const void *, const void *);
213 /* We need external help for these */
219 typedef volatile int hb_atomic_int_t;
220 #define hb_atomic_int_fetch_and_add(AI, V) g_atomic_int_exchange_and_add (&(AI), V)
221 #define hb_atomic_int_get(AI) g_atomic_int_get (&(AI))
222 #define hb_atomic_int_set(AI, V) g_atomic_int_set (&(AI), V)
224 typedef GStaticMutex hb_mutex_t;
225 #define HB_MUTEX_INIT G_STATIC_MUTEX_INIT
226 #define hb_mutex_init(M) g_static_mutex_init (&M)
227 #define hb_mutex_lock(M) g_static_mutex_lock (&M)
228 #define hb_mutex_trylock(M) g_static_mutex_trylock (&M)
229 #define hb_mutex_unlock(M) g_static_mutex_unlock (&M)
234 #define _HB__STR2__(x) #x
235 #define _HB__STR1__(x) _HB__STR2__(x)
236 #define _HB__LOC__ __FILE__ "("_HB__STR1__(__LINE__)") : Warning Msg: "
237 #pragma message(_HB__LOC__"Could not find any system to define platform macros, library will NOT be thread-safe")
239 #warning "Could not find any system to define platform macros, library will NOT be thread-safe"
242 typedef volatile int hb_atomic_int_t;
243 #define hb_atomic_int_fetch_and_add(AI, V) ((AI) += (V), (AI) - (V))
244 #define hb_atomic_int_get(AI) (AI)
245 #define hb_atomic_int_set(AI, V) HB_STMT_START { (AI) = (V); } HB_STMT_END
247 typedef volatile int hb_mutex_t;
248 #define HB_MUTEX_INIT 0
249 #define hb_mutex_init(M) HB_STMT_START { (M) = 0; } HB_STMT_END
250 #define hb_mutex_lock(M) HB_STMT_START { (M) = 1; } HB_STMT_END
251 #define hb_mutex_trylock(M) ((M) = 1, 1)
252 #define hb_mutex_unlock(M) HB_STMT_START { (M) = 0; } HB_STMT_END
257 /* A reference count */
260 hb_atomic_int_t ref_count;
262 #define HB_REFERENCE_COUNT_INVALID_VALUE ((hb_atomic_int_t) -1)
263 #define HB_REFERENCE_COUNT_INVALID {HB_REFERENCE_COUNT_INVALID_VALUE}
265 inline void init (int v) { ref_count = v; /* non-atomic is fine */ }
266 inline int inc (void) { return hb_atomic_int_fetch_and_add (ref_count, 1); }
267 inline int dec (void) { return hb_atomic_int_fetch_and_add (ref_count, -1); }
268 inline void set (int v) { return hb_atomic_int_set (ref_count, v); }
270 inline int get (void) const { return hb_atomic_int_get (ref_count); }
271 inline bool is_invalid (void) const { return get () == HB_REFERENCE_COUNT_INVALID_VALUE; }
273 } hb_reference_count_t;
276 /* Big-endian handling */
278 #define hb_be_uint16(v) ((uint16_t) ((((const uint8_t *)&(v))[0] << 8) + (((const uint8_t *)&(v))[1])))
280 #define hb_be_uint16_put(v,V) HB_STMT_START { v[0] = (V>>8); v[1] = (V); } HB_STMT_END
281 #define hb_be_uint16_get(v) (uint16_t) ((v[0] << 8) + v[1])
282 #define hb_be_uint16_cmp(a,b) (a[0] == b[0] && a[1] == b[1])
284 #define hb_be_uint32_put(v,V) HB_STMT_START { v[0] = (V>>24); v[1] = (V>>16); v[2] = (V>>8); v[3] = (V); } HB_STMT_END
285 #define hb_be_uint32_get(v) (uint32_t) ((v[0] << 24) + (v[1] << 16) + (v[2] << 8) + v[3])
286 #define hb_be_uint32_cmp(a,b) (a[0] == b[0] && a[1] == b[1] && a[2] == b[2] && a[3] == b[3])
289 /* ASCII tag/character handling */
291 #define ISALPHA(c) (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
292 #define ISALNUM(c) (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z') || ((c) >= '0' && (c) <= '9'))
293 #define TOUPPER(c) (((c) >= 'a' && (c) <= 'z') ? (c) - 'a' + 'A' : (c))
294 #define TOLOWER(c) (((c) >= 'A' && (c) <= 'Z') ? (c) - 'A' + 'a' : (c))
296 #define HB_TAG_CHAR4(s) (HB_TAG(((const char *) s)[0], \
297 ((const char *) s)[1], \
298 ((const char *) s)[2], \
299 ((const char *) s)[3]))
308 static inline hb_bool_t /* always returns TRUE */
309 _hb_trace (const char *what,
310 const char *function,
313 unsigned int max_depth)
315 (void) ((depth < max_depth) && fprintf (stderr, "%s(%p) %-*d-> %s\n", what, obj, depth, depth, function));
320 #include "hb-object-private.hh"
325 #endif /* HB_PRIVATE_HH */