2 * Copyright © 2017 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 * Google Author(s): Behdad Esfahbod
31 #include "hb-atomic.hh"
41 * Global runtime options.
46 bool unused : 1; /* In-case sign bit is here. */
48 bool uniscribe_bug_compatible : 1;
51 union hb_options_union_t {
55 static_assert ((sizeof (hb_atomic_int_t) >= sizeof (hb_options_union_t)), "");
60 extern HB_INTERNAL hb_atomic_int_t _hb_options;
62 static inline hb_options_t
66 return hb_options_t ();
68 /* Make a local copy, so we can access bitfield threadsafely. */
70 u.i = _hb_options.get_relaxed ();
75 u.i = _hb_options.get_relaxed ();
83 * Debug output (needs enabling at compile time.)
87 _hb_debug (unsigned int level,
88 unsigned int max_level)
90 return level < max_level;
93 #define DEBUG_LEVEL_ENABLED(WHAT, LEVEL) (_hb_debug ((LEVEL), HB_DEBUG_##WHAT))
94 #define DEBUG_ENABLED(WHAT) (DEBUG_LEVEL_ENABLED (WHAT, 0))
97 _hb_print_func (const char *func)
101 unsigned int func_len = strlen (func);
103 if (0 == strncmp (func, "static ", 7))
105 /* Skip "typename" */
106 if (0 == strncmp (func, "typename ", 9))
108 /* Skip return type */
109 const char *space = strchr (func, ' ');
112 /* Skip parameter list */
113 const char *paren = strchr (func, '(');
115 func_len = paren - func;
116 fprintf (stderr, "%.*s", func_len, func);
120 template <int max_level> static inline void
121 _hb_debug_msg_va (const char *what,
128 va_list ap) HB_PRINTF_FUNC(7, 0);
129 template <int max_level> static inline void
130 _hb_debug_msg_va (const char *what,
139 if (!_hb_debug (level, max_level))
142 fprintf (stderr, "%-10s", what ? what : "");
145 fprintf (stderr, "(%*p) ", (unsigned int) (2 * sizeof (void *)), obj);
147 fprintf (stderr, " %*s ", (unsigned int) (2 * sizeof (void *)), "");
150 #define VBAR "\342\224\202" /* U+2502 BOX DRAWINGS LIGHT VERTICAL */
151 #define VRBAR "\342\224\234" /* U+251C BOX DRAWINGS LIGHT VERTICAL AND RIGHT */
152 #define DLBAR "\342\225\256" /* U+256E BOX DRAWINGS LIGHT ARC DOWN AND LEFT */
153 #define ULBAR "\342\225\257" /* U+256F BOX DRAWINGS LIGHT ARC UP AND LEFT */
154 #define LBAR "\342\225\264" /* U+2574 BOX DRAWINGS LIGHT LEFT */
155 static const char bars[] =
156 VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
157 VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
158 VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
159 VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
160 VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR;
161 fprintf (stderr, "%2u %s" VRBAR "%s",
163 bars + sizeof (bars) - 1 - hb_min ((unsigned int) sizeof (bars) - 1, (unsigned int) (sizeof (VBAR) - 1) * level),
164 level_dir ? (level_dir > 0 ? DLBAR : ULBAR) : LBAR);
166 fprintf (stderr, " " VRBAR LBAR);
168 _hb_print_func (func);
172 fprintf (stderr, ": ");
173 vfprintf (stderr, message, ap);
176 fprintf (stderr, "\n");
178 template <> inline void HB_PRINTF_FUNC(7, 0)
179 _hb_debug_msg_va<0> (const char *what HB_UNUSED,
180 const void *obj HB_UNUSED,
181 const char *func HB_UNUSED,
182 bool indented HB_UNUSED,
183 unsigned int level HB_UNUSED,
184 int level_dir HB_UNUSED,
185 const char *message HB_UNUSED,
186 va_list ap HB_UNUSED) {}
188 template <int max_level> static inline void
189 _hb_debug_msg (const char *what,
196 ...) HB_PRINTF_FUNC(7, 8);
197 template <int max_level> static inline void HB_PRINTF_FUNC(7, 8)
198 _hb_debug_msg (const char *what,
208 va_start (ap, message);
209 _hb_debug_msg_va<max_level> (what, obj, func, indented, level, level_dir, message, ap);
212 template <> inline void
213 _hb_debug_msg<0> (const char *what HB_UNUSED,
214 const void *obj HB_UNUSED,
215 const char *func HB_UNUSED,
216 bool indented HB_UNUSED,
217 unsigned int level HB_UNUSED,
218 int level_dir HB_UNUSED,
219 const char *message HB_UNUSED,
220 ...) HB_PRINTF_FUNC(7, 8);
221 template <> inline void HB_PRINTF_FUNC(7, 8)
222 _hb_debug_msg<0> (const char *what HB_UNUSED,
223 const void *obj HB_UNUSED,
224 const char *func HB_UNUSED,
225 bool indented HB_UNUSED,
226 unsigned int level HB_UNUSED,
227 int level_dir HB_UNUSED,
228 const char *message HB_UNUSED,
231 #define DEBUG_MSG_LEVEL(WHAT, OBJ, LEVEL, LEVEL_DIR, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), nullptr, true, (LEVEL), (LEVEL_DIR), __VA_ARGS__)
232 #define DEBUG_MSG(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), nullptr, false, 0, 0, __VA_ARGS__)
233 #define DEBUG_MSG_FUNC(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), HB_FUNC, false, 0, 0, __VA_ARGS__)
240 template <typename T>
241 struct hb_printer_t {
242 const char *print (const T&) { return "something"; }
246 struct hb_printer_t<bool> {
247 const char *print (bool v) { return v ? "true" : "false"; }
251 struct hb_printer_t<hb_empty_t> {
252 const char *print (hb_empty_t) { return ""; }
260 template <typename T>
261 static inline void _hb_warn_no_return (bool returned)
263 if (unlikely (!returned)) {
264 fprintf (stderr, "OUCH, returned with no call to return_trace(). This is a bug, please report.\n");
268 /*static*/ inline void _hb_warn_no_return<hb_empty_t> (bool returned HB_UNUSED)
271 template <int max_level, typename ret_t>
272 struct hb_auto_trace_t
274 explicit inline hb_auto_trace_t (unsigned int *plevel_,
279 ...) HB_PRINTF_FUNC(6, 7)
280 : plevel (plevel_), what (what_), obj (obj_), returned (false)
282 if (plevel) ++*plevel;
285 va_start (ap, message);
286 _hb_debug_msg_va<max_level> (what, obj, func, true, plevel ? *plevel : 0, +1, message, ap);
291 _hb_warn_no_return<ret_t> (returned);
293 _hb_debug_msg<max_level> (what, obj, nullptr, true, plevel ? *plevel : 1, -1, " ");
295 if (plevel) --*plevel;
298 template <typename T>
300 const char *func = "",
301 unsigned int line = 0)
303 if (unlikely (returned)) {
304 fprintf (stderr, "OUCH, double calls to return_trace(). This is a bug, please report.\n");
305 return hb_forward<T> (v);
308 _hb_debug_msg<max_level> (what, obj, func, true, plevel ? *plevel : 1, -1,
309 "return %s (line %d)",
310 hb_printer_t<decltype (v)>().print (v), line);
311 if (plevel) --*plevel;
314 return hb_forward<T> (v);
318 unsigned int *plevel;
323 template <typename ret_t> /* Make sure we don't use hb_auto_trace_t when not tracing. */
324 struct hb_auto_trace_t<0, ret_t>
326 explicit inline hb_auto_trace_t (unsigned int *plevel_,
331 ...) HB_PRINTF_FUNC(6, 7) {}
333 template <typename T>
335 const char *func HB_UNUSED = nullptr,
336 unsigned int line HB_UNUSED = 0) { return hb_forward<T> (v); }
339 /* For disabled tracing; optimize out everything.
340 * https://github.com/harfbuzz/harfbuzz/pull/605 */
341 template <typename ret_t>
342 struct hb_no_trace_t {
343 template <typename T>
345 const char *func HB_UNUSED = nullptr,
346 unsigned int line HB_UNUSED = 0) { return hb_forward<T> (v); }
349 #define return_trace(RET) return trace.ret (RET, HB_FUNC, __LINE__)
356 #ifndef HB_DEBUG_ARABIC
357 #define HB_DEBUG_ARABIC (HB_DEBUG+0)
360 #ifndef HB_DEBUG_BLOB
361 #define HB_DEBUG_BLOB (HB_DEBUG+0)
364 #ifndef HB_DEBUG_CORETEXT
365 #define HB_DEBUG_CORETEXT (HB_DEBUG+0)
368 #ifndef HB_DEBUG_DIRECTWRITE
369 #define HB_DEBUG_DIRECTWRITE (HB_DEBUG+0)
373 #define HB_DEBUG_FT (HB_DEBUG+0)
376 #ifndef HB_DEBUG_GET_COVERAGE
377 #define HB_DEBUG_GET_COVERAGE (HB_DEBUG+0)
380 #ifndef HB_DEBUG_OBJECT
381 #define HB_DEBUG_OBJECT (HB_DEBUG+0)
384 #ifndef HB_DEBUG_SHAPE_PLAN
385 #define HB_DEBUG_SHAPE_PLAN (HB_DEBUG+0)
388 #ifndef HB_DEBUG_UNISCRIBE
389 #define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
396 #ifndef HB_DEBUG_APPLY
397 #define HB_DEBUG_APPLY (HB_DEBUG+0)
400 #define TRACE_APPLY(this) \
401 hb_auto_trace_t<HB_DEBUG_APPLY, bool> trace \
402 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
403 "idx %d gid %u lookup %d", \
404 c->buffer->idx, c->buffer->cur().codepoint, (int) c->lookup_index)
406 #define TRACE_APPLY(this) hb_no_trace_t<bool> trace
409 #ifndef HB_DEBUG_SANITIZE
410 #define HB_DEBUG_SANITIZE (HB_DEBUG+0)
412 #if HB_DEBUG_SANITIZE
413 #define TRACE_SANITIZE(this) \
414 hb_auto_trace_t<HB_DEBUG_SANITIZE, bool> trace \
415 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
418 #define TRACE_SANITIZE(this) hb_no_trace_t<bool> trace
421 #ifndef HB_DEBUG_SERIALIZE
422 #define HB_DEBUG_SERIALIZE (HB_DEBUG+0)
424 #if HB_DEBUG_SERIALIZE
425 #define TRACE_SERIALIZE(this) \
426 hb_auto_trace_t<HB_DEBUG_SERIALIZE, bool> trace \
427 (&c->debug_depth, "SERIALIZE", c, HB_FUNC, \
430 #define TRACE_SERIALIZE(this) hb_no_trace_t<bool> trace
433 #ifndef HB_DEBUG_SUBSET
434 #define HB_DEBUG_SUBSET (HB_DEBUG+0)
437 #define TRACE_SUBSET(this) \
438 hb_auto_trace_t<HB_DEBUG_SUBSET, bool> trace \
439 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
442 #define TRACE_SUBSET(this) hb_no_trace_t<bool> trace
445 #ifndef HB_DEBUG_DISPATCH
446 #define HB_DEBUG_DISPATCH ( \
448 HB_DEBUG_SANITIZE + \
449 HB_DEBUG_SERIALIZE + \
453 #if HB_DEBUG_DISPATCH
454 #define TRACE_DISPATCH(this, format) \
455 hb_auto_trace_t<context_t::max_debug_depth, typename context_t::return_t> trace \
456 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
457 "format %d", (int) format)
459 #define TRACE_DISPATCH(this, format) hb_no_trace_t<typename context_t::return_t> trace
463 #endif /* HB_DEBUG_HH */