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;
52 union hb_options_union_t {
56 static_assert ((sizeof (hb_atomic_int_t) >= sizeof (hb_options_union_t)), "");
61 extern HB_INTERNAL hb_atomic_int_t _hb_options;
63 static inline hb_options_t
67 return hb_options_t ();
69 /* Make a local copy, so we can access bitfield threadsafely. */
71 u.i = _hb_options.get_relaxed ();
76 u.i = _hb_options.get_relaxed ();
84 * Debug output (needs enabling at compile time.)
88 _hb_debug (unsigned int level,
89 unsigned int max_level)
91 return level < max_level;
94 #define DEBUG_LEVEL_ENABLED(WHAT, LEVEL) (_hb_debug ((LEVEL), HB_DEBUG_##WHAT))
95 #define DEBUG_ENABLED(WHAT) (DEBUG_LEVEL_ENABLED (WHAT, 0))
98 _hb_print_func (const char *func)
102 unsigned int func_len = strlen (func);
104 if (0 == strncmp (func, "static ", 7))
106 /* Skip "typename" */
107 if (0 == strncmp (func, "typename ", 9))
109 /* Skip return type */
110 const char *space = strchr (func, ' ');
113 /* Skip parameter list */
114 const char *paren = strchr (func, '(');
116 func_len = paren - func;
117 fprintf (stderr, "%.*s", func_len, func);
121 template <int max_level> static inline void
122 _hb_debug_msg_va (const char *what,
129 va_list ap) HB_PRINTF_FUNC(7, 0);
130 template <int max_level> static inline void
131 _hb_debug_msg_va (const char *what,
140 if (!_hb_debug (level, max_level))
143 fprintf (stderr, "%-10s", what ? what : "");
146 fprintf (stderr, "(%*p) ", (unsigned int) (2 * sizeof (void *)), obj);
148 fprintf (stderr, " %*s ", (unsigned int) (2 * sizeof (void *)), "");
151 #define VBAR "\342\224\202" /* U+2502 BOX DRAWINGS LIGHT VERTICAL */
152 #define VRBAR "\342\224\234" /* U+251C BOX DRAWINGS LIGHT VERTICAL AND RIGHT */
153 #define DLBAR "\342\225\256" /* U+256E BOX DRAWINGS LIGHT ARC DOWN AND LEFT */
154 #define ULBAR "\342\225\257" /* U+256F BOX DRAWINGS LIGHT ARC UP AND LEFT */
155 #define LBAR "\342\225\264" /* U+2574 BOX DRAWINGS LIGHT LEFT */
156 static const char bars[] =
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 VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR;
162 fprintf (stderr, "%2u %s" VRBAR "%s",
164 bars + sizeof (bars) - 1 - hb_min ((unsigned int) sizeof (bars) - 1, (unsigned int) (sizeof (VBAR) - 1) * level),
165 level_dir ? (level_dir > 0 ? DLBAR : ULBAR) : LBAR);
167 fprintf (stderr, " " VRBAR LBAR);
169 _hb_print_func (func);
173 fprintf (stderr, ": ");
174 vfprintf (stderr, message, ap);
177 fprintf (stderr, "\n");
179 template <> inline void HB_PRINTF_FUNC(7, 0)
180 _hb_debug_msg_va<0> (const char *what HB_UNUSED,
181 const void *obj HB_UNUSED,
182 const char *func HB_UNUSED,
183 bool indented HB_UNUSED,
184 unsigned int level HB_UNUSED,
185 int level_dir HB_UNUSED,
186 const char *message HB_UNUSED,
187 va_list ap HB_UNUSED) {}
189 template <int max_level> static inline void
190 _hb_debug_msg (const char *what,
197 ...) HB_PRINTF_FUNC(7, 8);
198 template <int max_level> static inline void HB_PRINTF_FUNC(7, 8)
199 _hb_debug_msg (const char *what,
209 va_start (ap, message);
210 _hb_debug_msg_va<max_level> (what, obj, func, indented, level, level_dir, message, ap);
213 template <> inline void
214 _hb_debug_msg<0> (const char *what HB_UNUSED,
215 const void *obj HB_UNUSED,
216 const char *func HB_UNUSED,
217 bool indented HB_UNUSED,
218 unsigned int level HB_UNUSED,
219 int level_dir HB_UNUSED,
220 const char *message HB_UNUSED,
221 ...) HB_PRINTF_FUNC(7, 8);
222 template <> inline void HB_PRINTF_FUNC(7, 8)
223 _hb_debug_msg<0> (const char *what HB_UNUSED,
224 const void *obj HB_UNUSED,
225 const char *func HB_UNUSED,
226 bool indented HB_UNUSED,
227 unsigned int level HB_UNUSED,
228 int level_dir HB_UNUSED,
229 const char *message HB_UNUSED,
232 #define DEBUG_MSG_LEVEL(WHAT, OBJ, LEVEL, LEVEL_DIR, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), nullptr, true, (LEVEL), (LEVEL_DIR), __VA_ARGS__)
233 #define DEBUG_MSG(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), nullptr, false, 0, 0, __VA_ARGS__)
234 #define DEBUG_MSG_FUNC(WHAT, OBJ, ...) _hb_debug_msg<HB_DEBUG_##WHAT> (#WHAT, (OBJ), HB_FUNC, false, 0, 0, __VA_ARGS__)
241 template <typename T>
242 struct hb_printer_t {
243 const char *print (const T&) { return "something"; }
247 struct hb_printer_t<bool> {
248 const char *print (bool v) { return v ? "true" : "false"; }
252 struct hb_printer_t<hb_empty_t> {
253 const char *print (hb_empty_t) { return ""; }
261 template <typename T>
262 static inline void _hb_warn_no_return (bool returned)
264 if (unlikely (!returned)) {
265 fprintf (stderr, "OUCH, returned with no call to return_trace(). This is a bug, please report.\n");
269 /*static*/ inline void _hb_warn_no_return<hb_empty_t> (bool returned HB_UNUSED)
272 template <int max_level, typename ret_t>
273 struct hb_auto_trace_t
275 explicit inline hb_auto_trace_t (unsigned int *plevel_,
280 ...) HB_PRINTF_FUNC(6, 7)
281 : plevel (plevel_), what (what_), obj (obj_), returned (false)
283 if (plevel) ++*plevel;
286 va_start (ap, message);
287 _hb_debug_msg_va<max_level> (what, obj, func, true, plevel ? *plevel : 0, +1, message, ap);
292 _hb_warn_no_return<ret_t> (returned);
294 _hb_debug_msg<max_level> (what, obj, nullptr, true, plevel ? *plevel : 1, -1, " ");
296 if (plevel) --*plevel;
299 template <typename T>
301 const char *func = "",
302 unsigned int line = 0)
304 if (unlikely (returned)) {
305 fprintf (stderr, "OUCH, double calls to return_trace(). This is a bug, please report.\n");
306 return hb_forward<T> (v);
309 _hb_debug_msg<max_level> (what, obj, func, true, plevel ? *plevel : 1, -1,
310 "return %s (line %d)",
311 hb_printer_t<decltype (v)>().print (v), line);
312 if (plevel) --*plevel;
315 return hb_forward<T> (v);
319 unsigned int *plevel;
324 template <typename ret_t> /* Make sure we don't use hb_auto_trace_t when not tracing. */
325 struct hb_auto_trace_t<0, ret_t>
327 explicit inline hb_auto_trace_t (unsigned int *plevel_,
332 ...) HB_PRINTF_FUNC(6, 7) {}
334 template <typename T>
336 const char *func HB_UNUSED = nullptr,
337 unsigned int line HB_UNUSED = 0) { return hb_forward<T> (v); }
340 /* For disabled tracing; optimize out everything.
341 * https://github.com/harfbuzz/harfbuzz/pull/605 */
342 template <typename ret_t>
343 struct hb_no_trace_t {
344 template <typename T>
346 const char *func HB_UNUSED = nullptr,
347 unsigned int line HB_UNUSED = 0) { return hb_forward<T> (v); }
350 #define return_trace(RET) return trace.ret (RET, HB_FUNC, __LINE__)
357 #ifndef HB_DEBUG_ARABIC
358 #define HB_DEBUG_ARABIC (HB_DEBUG+0)
361 #ifndef HB_DEBUG_BLOB
362 #define HB_DEBUG_BLOB (HB_DEBUG+0)
365 #ifndef HB_DEBUG_CORETEXT
366 #define HB_DEBUG_CORETEXT (HB_DEBUG+0)
369 #ifndef HB_DEBUG_DIRECTWRITE
370 #define HB_DEBUG_DIRECTWRITE (HB_DEBUG+0)
374 #define HB_DEBUG_FT (HB_DEBUG+0)
377 #ifndef HB_DEBUG_GET_COVERAGE
378 #define HB_DEBUG_GET_COVERAGE (HB_DEBUG+0)
381 #ifndef HB_DEBUG_OBJECT
382 #define HB_DEBUG_OBJECT (HB_DEBUG+0)
385 #ifndef HB_DEBUG_SHAPE_PLAN
386 #define HB_DEBUG_SHAPE_PLAN (HB_DEBUG+0)
389 #ifndef HB_DEBUG_UNISCRIBE
390 #define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
397 #ifndef HB_DEBUG_APPLY
398 #define HB_DEBUG_APPLY (HB_DEBUG+0)
401 #define TRACE_APPLY(this) \
402 hb_auto_trace_t<HB_DEBUG_APPLY, bool> trace \
403 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
404 "idx %d gid %u lookup %d", \
405 c->buffer->idx, c->buffer->cur().codepoint, (int) c->lookup_index)
407 #define TRACE_APPLY(this) hb_no_trace_t<bool> trace
410 #ifndef HB_DEBUG_SANITIZE
411 #define HB_DEBUG_SANITIZE (HB_DEBUG+0)
413 #if HB_DEBUG_SANITIZE
414 #define TRACE_SANITIZE(this) \
415 hb_auto_trace_t<HB_DEBUG_SANITIZE, bool> trace \
416 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
419 #define TRACE_SANITIZE(this) hb_no_trace_t<bool> trace
422 #ifndef HB_DEBUG_SERIALIZE
423 #define HB_DEBUG_SERIALIZE (HB_DEBUG+0)
425 #if HB_DEBUG_SERIALIZE
426 #define TRACE_SERIALIZE(this) \
427 hb_auto_trace_t<HB_DEBUG_SERIALIZE, bool> trace \
428 (&c->debug_depth, "SERIALIZE", c, HB_FUNC, \
431 #define TRACE_SERIALIZE(this) hb_no_trace_t<bool> trace
434 #ifndef HB_DEBUG_SUBSET
435 #define HB_DEBUG_SUBSET (HB_DEBUG+0)
438 #define TRACE_SUBSET(this) \
439 hb_auto_trace_t<HB_DEBUG_SUBSET, bool> trace \
440 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
443 #define TRACE_SUBSET(this) hb_no_trace_t<bool> trace
446 #ifndef HB_DEBUG_DISPATCH
447 #define HB_DEBUG_DISPATCH ( \
449 HB_DEBUG_SANITIZE + \
450 HB_DEBUG_SERIALIZE + \
454 #if HB_DEBUG_DISPATCH
455 #define TRACE_DISPATCH(this, format) \
456 hb_auto_trace_t<context_t::max_debug_depth, typename context_t::return_t> trace \
457 (&c->debug_depth, c->get_name (), this, HB_FUNC, \
458 "format %d", (int) format)
460 #define TRACE_DISPATCH(this, format) hb_no_trace_t<typename context_t::return_t> trace
464 #endif /* HB_DEBUG_HH */