Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/scripts/wrap/parse.py @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 '''
2 Support for accessing parse tree for MuPDF headers.
3 '''
4
5 import os
6 import sys
7 import time
8
9 import jlib
10
11 try:
12 import clang
13 except ImportError as e:
14 jlib.log( 'Warning, could not import clang: {e}')
15 clang = None
16
17 from . import classes
18 from . import cpp
19 from . import state
20 from . import util
21
22
23 def get_extras(tu, type_):
24 '''
25 Returns (cursor, typename, extras):
26 cursor: for base type.
27 typename:
28 extras: None or from classes.classextras.
29 '''
30 base_type = get_base_type( type_)
31 base_type_cursor = base_type.get_declaration()
32 base_typename = get_base_typename( base_type)
33 extras = classes.classextras.get( tu, base_typename)
34 return base_type_cursor, base_typename, extras
35
36 def fileline( cursor):
37 '''
38 Returns <file>:<line> from cursor.location.
39 '''
40 f = cursor.location.file
41 filename = os.path.relpath( f.name) if f else ''
42 return f'{filename}:{cursor.location.line}'
43
44
45 def prefix( name):
46 if name.startswith( 'fz_'):
47 return 'fz_'
48 if name.startswith( 'pdf_'):
49 return 'pdf_'
50 assert 0, f'unrecognised prefix (not fz_ or pdf_) in name={name}'
51
52
53 def get_fz_extras( tu, fzname):
54 '''
55 Finds ClassExtra for <fzname>, coping if <fzname> starts with 'const ' or
56 'struct '. Returns None if not found.
57 '''
58 fzname = util.clip( fzname, 'const ')
59 fzname = util.clip( fzname, 'struct ')
60 ce = classes.classextras.get( tu, fzname)
61 return ce
62
63 def get_children(cursor):
64 '''
65 Like cursor.get_children() but recurses into cursors with
66 clang.cindex.CursorKind.UNEXPOSED_DECL which picks up top-level items
67 marked with `extern "C"`, and clang.cindex.CursorKind.LINKAGE_SPEC which
68 picks up items inside `extern "C" {...}`.
69 '''
70 verbose = 0
71 for cursor in cursor.get_children():
72 #verbose = state.state_.show_details( cursor.spelling)
73 #verbose = 1
74 if cursor.kind == clang.cindex.CursorKind.UNEXPOSED_DECL:
75 # Things tagged with `extern "C" appear to be within this
76 # cursor.
77 for cursor2 in cursor.get_children():
78 if verbose and cursor.spelling:
79 jlib.log( '{cursor.spelling=}')
80 yield cursor2
81 elif cursor.kind == clang.cindex.CursorKind.LINKAGE_SPEC:
82 # extern "C" {...}
83 for cursor2 in cursor.get_children():
84 if verbose and cursor.spelling:
85 jlib.log( '{cursor.spelling=}')
86 yield cursor2
87 else:
88 if verbose and cursor.spelling:
89 jlib.log( '{cursor.spelling=}')
90 yield cursor
91
92 def get_members( type_or_cursor, include_empty=False):
93 '''
94 Yields cursor for each member. Uses whichever of
95 clang.cindex.Cursor.get_children() or clang.cindex.Type.get_fields() works.
96
97 Args:
98 type_or_cursor:
99 .
100 include_empty:
101 If false (the default), we first try
102 clang.cindex.Cursor.get_children(), but ignore items for which
103 .spelling==''. If resulting list is empty, we instead use
104 clang.cindex.Type.get_fields().
105
106 Otherwise, we return list of items from
107 clang.cindex.Cursor.get_children(), regardless of whether they
108 have .spelling==''. This allows finding of non-typedef enums, for
109 example.
110 '''
111 if isinstance( type_or_cursor, clang.cindex.Type):
112 cursor = type_or_cursor.get_declaration()
113 elif isinstance( type_or_cursor, clang.cindex.Cursor):
114 cursor = type_or_cursor
115 else:
116 assert 0
117 if cursor.type.kind in (state.clang.cindex.TypeKind.TYPEDEF, state.clang.cindex.TypeKind.ELABORATED):
118 cursor2 = cursor.underlying_typedef_type.get_declaration()
119 else:
120 cursor2 = cursor
121
122 if 0:
123 # Diagnostics to show the difference between
124 # clang.cindex.Cursor.get_children() and
125 # clang.cindex.Type.get_fields().
126 #
127 # For example it looks like clang.cindex.Cursor.get_children() can
128 # return an extra item with .spelling=='' for 'union {...} u;'.
129 #
130 ret_cursor = list()
131 ret_cursor_no_empty = list()
132 ret_type = list()
133 for cursor3 in cursor2.get_children():
134 item = (cursor3.spelling, cursor3.location.file.name, cursor3.location.line)
135 ret_cursor.append( item)
136 if cursor3.spelling:
137 ret_cursor_no_empty.append( item)
138 for cursor3 in cursor.type.get_canonical().get_fields():
139 ret_type.append( (cursor3.spelling, cursor3.location.file.name, cursor3.location.line))
140 ret_cursor.sort()
141 ret_type.sort()
142 ret_cursor_no_empty.sort()
143 if (not ret_cursor_no_empty) and ret_type:
144 jlib.log( 'ret_type and not ret_cursor_no_empty:')
145 for i in ret_type:
146 jlib.log( ' ret_type: {i}')
147 if 0 and ret_cursor != ret_type:
148 jlib.log('get_children() != get_fields():')
149 for i in ret_cursor:
150 jlib.log( ' ret_cursor: {i}')
151 for i in ret_type:
152 jlib.log( ' ret_type: {i}')
153
154 ret = list()
155 for cursor3 in cursor2.get_children():
156 if include_empty or cursor3.spelling:
157 ret.append(cursor3)
158 if not ret:
159 type_ = cursor.type.get_canonical()
160 for cursor3 in type_.get_fields():
161 ret.append( cursor3)
162 for i in ret:
163 yield i
164
165 def get_field0( type_):
166 '''
167 Returns cursor for first field in <type_> or None if <type_> has no fields.
168 '''
169 verbose = state.state_.show_details( type_.spelling)
170 for cursor in get_members(type_):
171 return cursor
172
173 get_base_type_cache = dict()
174 def get_base_type( type_):
175 '''
176 Repeatedly dereferences pointer and returns the ultimate type.
177 '''
178 # Caching reduces time from to 0.24s to 0.1s.
179 key = type_.spelling
180 ret = get_base_type_cache.get( key)
181 if ret is None:
182 while 1:
183 type_ = state.get_name_canonical( type_)
184 if type_.kind != clang.cindex.TypeKind.POINTER:
185 break
186 type_ = type_.get_pointee()
187 ret = type_
188 get_base_type_cache[ key] = ret
189
190 return ret
191
192 def get_base_typename( type_):
193 '''
194 Follows pointer to get ultimate type, and returns its name, with any
195 leading 'struct ' or 'const ' removed.
196 '''
197 type_ = get_base_type( type_)
198 ret = type_.spelling
199 ret = util.clip( ret, 'const ')
200 ret = util.clip( ret, 'struct ')
201 return ret
202
203 def is_double_pointer( type_):
204 '''
205 Returns true if <type_> is double pointer.
206 '''
207 type_ = state.get_name_canonical( type_)
208 if type_.kind == clang.cindex.TypeKind.POINTER:
209 type_ = state.get_name_canonical( type_.get_pointee())
210 if type_.kind == clang.cindex.TypeKind.POINTER:
211 return True
212
213 has_refs_cache = dict()
214 def has_refs( tu, type_):
215 '''
216 Returns (offset, bits) if <type_> has a 'refs' member, otherwise False.
217 offset:
218 Byte offset of 'refs' or name of 'refs' for use with offsetof(),
219 e.g. 'super.refs'.
220 bits:
221 Size of 'refs' in bits. Will be -1 if there is no simple .refs
222 member (e.g. fz_xml).
223 '''
224 type0 = type_
225 type_ = type_.get_canonical()
226
227 key = type_.spelling
228 key = util.clip(key, 'struct ')
229 verbose = state.state_.show_details( key)
230 ret = has_refs_cache.get( key, None)
231 if ret is None:
232 ret = False
233 if verbose:
234 jlib.log( 'Analysing {type0.spelling=} {type_.spelling=} {key=}')
235
236 for prefix in (
237 'fz_',
238 'pdf_',
239 ):
240 if verbose:
241 jlib.log( '{type_.spelling=} {prefix=}')
242 if key.startswith( prefix):
243 if verbose:
244 jlib.log( 'Type is a fz_ or pdf_ struct: {key=}')
245 keep_name = f'{prefix}keep_{key[len(prefix):]}'
246 keep_fn_cursor = state.state_.find_function( tu, keep_name, method=False)
247 if verbose:
248 jlib.log( '{keep_name=} {keep_fn_cursor=}')
249 if keep_fn_cursor:
250 if verbose:
251 jlib.log( 'There is a keep() fn for this type so it uses reference counting: {keep_name=}')
252 base_type_cursor = get_base_type( type_).get_declaration()
253 if base_type_cursor.is_definition():
254 if verbose:
255 jlib.log( 'Type definition is available so we look for .refs member: {key=} {type_.spelling=} {fileline(base_type_cursor)=}')
256 if verbose:
257 jlib.log('type_.get_fields()')
258 for cursor in get_members(type_):
259 jlib.log(' {cursor.spelling=}')
260 jlib.log('base_type_cursor.get_children()')
261 for cursor in base_type_cursor.get_children():
262 jlib.log(' {cursor.spelling=}')
263 jlib.log('.')
264 for cursor in get_members(type_):
265 name = cursor.spelling
266 type2 = state.get_name_canonical( cursor.type)
267 if verbose:
268 jlib.log( '{name=} {type2.spelling=}')
269 if name == 'refs' and type2.spelling == 'int':
270 ret = 'refs', 32
271 break
272 if name == 'storable' and type2.spelling in ('struct fz_storable', 'fz_storable'):
273 ret = 'storable.refs', 32
274 break
275 else:
276 if 0:
277 jlib.log('Definition is not available for {key=}'
278 ' because {base_type_cursor.spelling=} .is_definition()'
279 ' returns false.'
280 ' base_type_cursor.location={fileline(base_type_cursor)}'
281 )
282
283 if not ret:
284 if verbose:
285 jlib.log(
286 '{type_.spelling=}: Cannot find .refs member or we only have forward'
287 ' declaration, so have to hard-code the size and offset'
288 ' of the refs member.'
289 )
290 if base_type_cursor.is_definition():
291 if key == 'pdf_document':
292 ret = 'super.refs', 32
293 elif key == 'pdf_page':
294 ret = 'super.refs', 32
295 elif key == 'fz_pixmap':
296 ret = 'storable.refs', 32
297 elif key in (
298 'fz_colorspace',
299 'fz_image',
300 ):
301 return 'key_storable.storable.refs', 32
302 elif key == 'pdf_cmap':
303 return 'storable.refs', 32
304 else:
305 #jlib.log( 'No definition available, i.e. forward decl only.')
306 if key == 'pdf_obj':
307 ret = 0, 16
308 elif key == 'fz_path':
309 ret = 0, 8
310 elif key in (
311 'fz_separations',
312 'fz_halftone',
313 'pdf_annot',
314 'pdf_graft_map',
315 ):
316 # Forward decl, first member is 'int regs;'.
317 return 0, 32
318 elif key in (
319 'fz_display_list',
320 'fz_glyph',
321 'fz_jbig2_globals',
322 'pdf_function',
323 ):
324 # Forward decl, first member is 'fz_storable storable;'.
325 return 0, 32
326 elif key == 'fz_xml':
327 # This only has a simple .refs member if the
328 # .up member is null, so we don't attempt to
329 # use it, by returning size=-1.
330 ret = 0, -1
331
332 if ret is None:
333 # Need to hard-code info for this type.
334 assert 0, jlib.expand_nv(
335 '{key=} has {keep_name}() fn but is forward decl or we cannot find .refs,'
336 ' and we have no hard-coded info about size and offset of .regs.'
337 ' {type0.spelling=} {type_.spelling=} {base_type_cursor.spelling}'
338 )
339 assert ret, (
340 f'{key} has {keep_name}() but have not found size/location of .refs member.'
341 f' {type_.spelling=}'
342 f' {base_type_cursor.spelling=}'
343 f': {fileline(base_type_cursor)}'
344 )
345
346 if type_.spelling in (
347 'struct fz_document',
348 'struct fz_buffer',
349 ):
350 assert ret
351 #jlib.log('Populating has_refs_cache with {key=} {ret=}')
352 has_refs_cache[ key] = ret
353 return ret
354
355 def get_value( item, name):
356 '''
357 Enhanced wrapper for getattr().
358
359 We call ourselves recursively if name contains one or more '.'. If name
360 ends with (), makes fn call to get value.
361 '''
362 if not name:
363 return item
364 dot = name.find( '.')
365 if dot >= 0:
366 item_sub = get_value( item, name[:dot])
367 return get_value( item_sub, name[dot+1:])
368 if name.endswith('()'):
369 value = getattr( item, name[:-2])
370 assert callable(value)
371 return value()
372 return getattr( item, name)
373
374 def get_list( item, *names):
375 '''
376 Uses get_value() to find values of specified fields in <item>.
377
378 Returns list of (name,value) pairs.
379 '''
380 ret = []
381 for name in names:
382 value = get_value( item, name)
383 ret.append((name, value))
384 return ret
385
386 def get_text( item, prefix, sep, *names):
387 '''
388 Returns text describing <names> elements of <item>.
389 '''
390 ret = []
391 for name, value in get_list( item, *names):
392 ret.append( f'{name}={value}')
393 return prefix + sep.join( ret)
394
395
396 def dump_ast( cursor, out=None, depth=0):
397 cleanup = lambda: None
398 if out is None:
399 out = sys.stdout
400 if isinstance(out, str):
401 out = open(out, 'w')
402 cleanup = lambda : out.close()
403 try:
404 indent = depth*4*' '
405 for cursor2 in cursor.get_children():
406
407 def or_none(f):
408 try:
409 return f()
410 except Exception:
411 return
412 result = or_none( cursor2.type.get_result)
413 type_ = cursor2.type
414 type_canonical = or_none( cursor2.type.get_canonical)
415
416 text = indent
417 text += jlib.log_text(
418 '{cursor2.kind=}'
419 ' {cursor2.displayname=}'
420 ' {cursor2.spelling=}'
421 ' {cursor2.linkage=}'
422 ' {cursor2.is_definition()=}'
423 )
424 if result:
425 text += jlib.log_text(' {result.spelling=}')
426 if type_:
427 text += jlib.log_text(' {type_.spelling=}')
428 if type_canonical:
429 text += jlib.log_text(' {type_canonical.spelling=}')
430 text += '\n'
431 if callable(out):
432 out( text)
433 else:
434 out.write(text)
435
436 dump_ast( cursor2, out, depth+1)
437 finally:
438 cleanup()
439
440 def show_ast( filename, includes):
441 jlib.log('Parsing {filename=}')
442 index = clang.cindex.Index.create()
443 args = []
444 for include in includes:
445 args += ['-I', include]
446 tu = index.parse( filename,
447 args = args,
448 )
449 dump_ast( tu.cursor)
450
451 class Arg:
452 '''
453 Information about a function argument.
454
455 .cursor:
456 Cursor for the argument.
457 .name:
458 Arg name, or an invented name if none was present.
459 .separator:
460 '' for first returned argument, ', ' for the rest.
461 .alt:
462 Cursor for underlying fz_ struct type if <arg> is a pointer to or
463 ref/value of a fz_ struct type that we wrap. Else None.
464 .out_param:
465 True if this looks like an out-parameter, e.g. alt is set and
466 double pointer, or arg is pointer other than to char.
467 .name_python:
468 Same as .name or .name+'_' if .name is a Python keyword.
469 .name_csharp:
470 Same as .name or .name+'_' if .name is a C# keyword.
471 '''
472 def __init__(self, cursor, name, separator, alt, out_param):
473 self.cursor = cursor
474 self.name = name
475 self.separator = separator
476 self.alt = alt
477 self.out_param = out_param
478 if name in ('in', 'is'):
479 self.name_python = f'{name}_'
480 else:
481 self.name_python = name
482 self.name_csharp = f'{name}_' if name in ('out', 'is', 'in', 'params') else name
483
484 def __str__(self):
485 return f'Arg(name={self.name} alt={"true" if self.alt else "false"} out_param={self.out_param})'
486
487
488 get_args_cache = dict()
489
490 def get_args( tu, cursor, include_fz_context=False, skip_first_alt=False, verbose=False):
491 '''
492 Yields Arg instance for each arg of the function at <cursor>.
493
494 Args:
495 tu:
496 A clang.cindex.TranslationUnit instance.
497 cursor:
498 Clang cursor for the function.
499 include_fz_context:
500 If false, we skip args that are 'struct fz_context*'
501 skip_first_alt:
502 If true, we skip the first arg with .alt set.
503 verbose:
504 .
505 '''
506 # We are called a few times for each function, and the calculations we do
507 # are slow, so we cache the returned items. E.g. this reduces total time of
508 # --build 0 from 3.5s to 2.1s.
509 #
510 if verbose:
511 jlib.log( '## Looking at args of {cursor.spelling=}')
512 key = tu, cursor.location.file, cursor.location.line, include_fz_context, skip_first_alt
513 ret = get_args_cache.get( key)
514 if not verbose and state.state_.show_details(cursor.spelling):
515 verbose = True
516 if ret is None:
517 if verbose:
518 jlib.log( '## Looking at args of {cursor.spelling=}')
519 ret = []
520 i = 0
521 i_alt = 0
522 separator = ''
523 for arg_cursor in cursor.get_arguments():
524 if verbose:
525 jlib.log('{arg_cursor.kind=} {arg_cursor.spelling=}')
526 assert arg_cursor.kind == clang.cindex.CursorKind.PARM_DECL
527 if not include_fz_context and is_pointer_to( arg_cursor.type, 'fz_context'):
528 # Omit this arg because our generated mupdf_*() wrapping functions
529 # use internalContextGet() to get a context.
530 continue
531 name = arg_cursor.spelling or f'arg_{i}'
532 if 0 and name == 'stmofsp':
533 verbose = True
534 alt = None
535 out_param = False
536 base_type_cursor, base_typename, extras = get_extras( tu, arg_cursor.type)
537 if verbose:
538 jlib.log( 'Looking at arg. {extras=}')
539 if extras:
540 if verbose:
541 jlib.log( '{extras.opaque=} {base_type_cursor.kind=} {base_type_cursor.is_definition()=}')
542 if extras.opaque:
543 # E.g. we don't have access to definition of fz_separation,
544 # but it is marked in classes.classextras with opaque=true,
545 # so there will be a wrapper class.
546 alt = base_type_cursor
547 elif (1
548 and base_type_cursor.kind == clang.cindex.CursorKind.STRUCT_DECL
549 #and base_type_cursor.is_definition()
550 ):
551 alt = base_type_cursor
552 if verbose:
553 jlib.log( '{arg_cursor.type.spelling=} {base_typename=} {arg_cursor.type.kind=} {get_base_typename(arg_cursor.type)=}')
554 jlib.log( '{get_base_type(arg_cursor.type).kind=}')
555 if alt:
556 if is_double_pointer( arg_cursor.type):
557 out_param = True
558 elif get_base_typename( arg_cursor.type) in ('char', 'unsigned char', 'signed char', 'void', 'FILE'):
559 if is_double_pointer( arg_cursor.type):
560 if verbose:
561 jlib.log( 'setting outparam: {cursor.spelling=} {arg_cursor.type=}')
562 if cursor.spelling == 'pdf_clean_file':
563 # Don't mark char** argv as out-param, which will also
564 # allow us to tell swig to convert python lists into
565 # (argc,char**) pair.
566 pass
567 else:
568 if verbose:
569 jlib.log('setting out_param to true')
570 out_param = True
571 elif ( base_typename.startswith( ('fz_', 'pdf_'))
572 and get_base_type(arg_cursor.type).kind != clang.cindex.TypeKind.ENUM
573 ):
574 # Pointer to fz_ struct is not usually an out-param.
575 if verbose:
576 jlib.log(
577 'not out-param because pointer to struct:'
578 ' arg is: {arg_cursor.displayname=}'
579 ' {base_typename.spelling=}'
580 ' {extras}'
581 ' {arg_cursor.type.kind=}'
582 )
583 elif arg_cursor.type.kind == clang.cindex.TypeKind.POINTER:
584 pointee = arg_cursor.type.get_pointee()
585 if verbose:
586 jlib.log( 'clang.cindex.TypeKind.POINTER')
587 if state.get_name_canonical( pointee).kind == clang.cindex.TypeKind.FUNCTIONPROTO:
588 # Don't mark function-pointer args as out-params.
589 if verbose:
590 jlib.log( 'clang.cindex.TypeKind.FUNCTIONPROTO')
591 elif pointee.is_const_qualified():
592 if verbose:
593 jlib.log( 'is_const_qualified()')
594 elif pointee.spelling == 'FILE':
595 pass
596 else:
597 if verbose:
598 jlib.log( 'setting out_param = True')
599 out_param = True
600 if alt:
601 i_alt += 1
602 i += 1
603 if alt and skip_first_alt and i_alt == 1:
604 continue
605 arg = Arg(arg_cursor, name, separator, alt, out_param)
606 ret.append(arg)
607 if verbose:
608 jlib.log( 'Appending {arg=}')
609 separator = ', '
610
611 get_args_cache[ key] = ret
612
613 for arg in ret:
614 yield arg
615
616
617 def fn_has_struct_args( tu, cursor):
618 '''
619 Returns true if fn at <cursor> takes any fz_* struct args.
620 '''
621 for arg in get_args( tu, cursor):
622 if arg.alt:
623 return True
624
625 def get_first_arg( tu, cursor):
626 '''
627 Returns (arg, n), where <arg> is from get_args() for first argument (or
628 None if no arguments), and <n> is number of arguments.
629 '''
630 n = 0
631 ret = None
632 for arg in get_args( tu, cursor):
633 if n == 0:
634 ret = arg
635 n += 1
636 return ret, n
637
638
639 is_cache = dict()
640
641 def is_( type_, type2):
642 key = type_.spelling, type2
643 ret = is_cache.get( key)
644 if ret is None:
645 d = cpp.declaration_text( type_, '', top_level='')
646 d = util.clip( d, 'const ')
647 d = util.clip( d, 'struct ')
648 d = d.strip()
649 ret = (d == type2)
650 is_cache[ key] = ret
651 return ret
652
653 is_pointer_to_cache = dict()
654
655 def is_pointer_to( type_, destination, verbose=False):
656 '''
657 Returns true if <type> is a pointer to <destination>.
658
659 We do this using text for <destination>, rather than a clang.cindex.Type
660 or clang.cindex.Cursor, so that we can represent base types such as int or
661 char without having clang parse system headers. This involves stripping any
662 initial 'struct ' text.
663
664 Also, clang's representation of mupdf's varying use of typedef, struct and
665 forward-declarations is rather difficult to work with directly.
666
667 type_:
668 A clang.cindex.Type.
669 destination:
670 Text typename.
671 '''
672 # Use cache - reduces time from 0.6s to 0.2.
673 #
674 key = type_.spelling, destination
675 ret = is_pointer_to_cache.get( key)
676 if verbose or ret is None:
677 assert isinstance( type_, clang.cindex.Type)
678 if verbose: jlib.log( '{type_.spelling=}')
679 ret = None
680 destination = util.clip( destination, 'struct ')
681 if type_.kind == clang.cindex.TypeKind.POINTER:
682 pointee = type_.get_pointee()
683 if verbose: jlib.log('{pointee.spelling=}')
684 d = cpp.declaration_text( pointee, '', top_level='', verbose=verbose)
685 d = util.clip( d, 'const ')
686 d = util.clip( d, 'struct ')
687 if verbose:
688 jlib.log( '{destination=} {type_.get_pointee().kind=} {type_.get_pointee().spelling=} {state.get_name_canonical( type_.get_pointee()).spelling=}')
689 ret = d.strip() == destination or d.strip() == f'const {destination}'
690 is_pointer_to_cache[ key] = ret
691
692 return ret
693
694 def is_pointer_to_pointer_to( type_, destination, verbose=False):
695 if verbose:
696 jlib.log( '{type_.spelling=}')
697 if type_.kind != clang.cindex.TypeKind.POINTER:
698 return False
699 pointee = type_.get_pointee()
700 return is_pointer_to( pointee, destination, verbose=verbose)
701
702
703 class MethodExcludeReason_VARIADIC:
704 pass
705 class MethodExcludeReason_OMIT_CLASS:
706 pass
707 class MethodExcludeReason_NO_EXTRAS:
708 pass
709 class MethodExcludeReason_NO_RAW_CONSTRUCTOR:
710 pass
711 class MethodExcludeReason_NOT_COPYABLE:
712 pass
713 class MethodExcludeReason_NO_WRAPPER_CLASS:
714 pass
715 class MethodExcludeReason_ENUM:
716 pass
717 class MethodExcludeReason_FIRST_ARG_NOT_STRUCT:
718 pass
719
720 # Maps from <structname> to list of functions satisfying conditions specified
721 # by find_wrappable_function_with_arg0_type() below.
722 #
723 find_wrappable_function_with_arg0_type_cache = None
724
725 # Maps from fnname to list of strings, each string being a description of why
726 # this fn is not suitable for wrapping by class method.
727 #
728 find_wrappable_function_with_arg0_type_excluded_cache = None
729
730 # Maps from function name to the class that has a method that wraps this
731 # function.
732 #
733 fnname_to_method_structname = dict()
734
735 def find_wrappable_function_with_arg0_type_cache_populate( tu):
736 '''
737 Populates caches with wrappable functions.
738 '''
739 global find_wrappable_function_with_arg0_type_cache
740 global find_wrappable_function_with_arg0_type_excluded_cache
741
742 if find_wrappable_function_with_arg0_type_cache:
743 return
744
745 t0 = time.time()
746
747 find_wrappable_function_with_arg0_type_cache = dict()
748 find_wrappable_function_with_arg0_type_excluded_cache = dict()
749
750 for fnname, cursor in state.state_.find_functions_starting_with( tu, ('fz_', 'pdf_'), method=True):
751
752 exclude_reasons = []
753
754 if fnname.startswith( 'fz_drop_') or fnname.startswith( 'fz_keep_'):
755 continue
756 if fnname.startswith( 'pdf_drop_') or fnname.startswith( 'pdf_keep_'):
757 continue
758
759 if cursor.type.is_function_variadic():
760 exclude_reasons.append(
761 (
762 MethodExcludeReason_VARIADIC,
763 'function is variadic',
764 ))
765
766 # Look at resulttype.
767 #
768 result_type = cursor.type.get_result()
769 if result_type.kind == clang.cindex.TypeKind.POINTER:
770 result_type = result_type.get_pointee()
771 result_type_name = state.get_name_canonical( result_type)
772 result_type_name = util.clip( result_type.spelling, 'struct ')
773 if result_type_name.startswith( ('fz_', 'pdf_')):
774 if result_type.kind == clang.cindex.TypeKind.TYPEDEF:
775 result_cursor = result_type.get_declaration()
776 result_type = result_cursor.underlying_typedef_type
777
778 if result_type.kind == state.clang.cindex.TypeKind.ELABORATED:
779 result_type_extras = get_fz_extras( tu, result_type_name)
780 if not result_type_extras:
781 exclude_reasons.append(
782 (
783 MethodExcludeReason_NO_EXTRAS,
784 f'no extras defined for result_type={result_type_name}.'
785 ))
786 else:
787 if not result_type_extras.constructor_raw:
788 exclude_reasons.append(
789 (
790 MethodExcludeReason_NO_RAW_CONSTRUCTOR,
791 f'wrapper for result_type={result_type_name} does not have raw constructor.',
792 ))
793 if not result_type_extras.copyable:
794 exclude_reasons.append(
795 (
796 MethodExcludeReason_NOT_COPYABLE,
797 f'wrapper for result_type={result_type_name} is not copyable.',
798 ))
799
800 # Look at args
801 #
802 i = 0
803 arg0_cursor = None
804 for arg in get_args( tu, cursor):
805
806 base_typename = get_base_typename( arg.cursor.type)
807 if not arg.alt and base_typename.startswith( ('fz_', 'pdf_')):
808 t_canonical = state.get_name_canonical( arg.cursor.type)
809 if t_canonical.kind == clang.cindex.TypeKind.ENUM:
810 # We don't (yet) wrap fz_* enums, but for now at least we
811 # still wrap functions that take fz_* enum parameters -
812 # callers will have to use the fz_* type.
813 #
814 # For example this is required by mutool_draw.py because
815 # mudraw.c calls fz_set_separation_behavior().
816 #
817 jlib.logx(
818 'not excluding {fnname=} with enum fz_ param:'
819 ' {arg.cursor.spelling=}'
820 ' {arg.cursor.type.kind}'
821 ' {state.get_name_canonical(arg.cursor.type).kind=}'
822 )
823 elif t_canonical.kind == clang.cindex.TypeKind.POINTER:
824 pass
825 else:
826 exclude_reasons.append(
827 (
828 MethodExcludeReason_NO_WRAPPER_CLASS,
829 f'no wrapper class for arg i={i}:'
830 f' {state.get_name_canonical( arg.cursor.type).spelling}'
831 f' {state.get_name_canonical(arg.cursor.type).kind}'
832 ,
833 ))
834 if i == 0:
835 if arg.alt:
836 arg0_cursor = arg.alt
837 else:
838 exclude_reasons.append(
839 (
840 MethodExcludeReason_FIRST_ARG_NOT_STRUCT,
841 'first arg is not fz_* struct',
842 ))
843 i += 1
844
845 if exclude_reasons:
846 find_wrappable_function_with_arg0_type_excluded_cache[ fnname] = exclude_reasons
847 #if fnname == 'fz_load_outline': # lgtm [py/unreachable-statement]
848 if state.state_.show_details(fnname):
849 jlib.log( 'Excluding {fnname=} from possible class methods because:')
850 for i in exclude_reasons:
851 jlib.log( ' {i}')
852 else:
853 if i > 0:
854 # <fnname> is ok to wrap.
855 arg0 = state.get_name_canonical( arg0_cursor.type).spelling
856 arg0 = util.clip( arg0, 'struct ')
857
858 #jlib.log( '=== Adding to {arg0=}: {fnname=}. {len(fnname_to_method_structname)=}')
859
860 items = find_wrappable_function_with_arg0_type_cache.setdefault( arg0, [])
861 items.append( fnname)
862
863 fnname_to_method_structname[ fnname] = arg0
864
865 jlib.log1( f'populating find_wrappable_function_with_arg0_type_cache took {time.time()-t0:.2f}s')
866
867
868 def find_wrappable_function_with_arg0_type( tu, structname):
869 '''
870 Return list of fz_*() function names which could be wrapped as a method of
871 our wrapper class for <structname>.
872
873 The functions whose names we return, satisfy all of the following:
874
875 First non-context param is <structname> (by reference, pointer or value).
876
877 If return type is a fz_* struct (by reference, pointer or value), the
878 corresponding wrapper class has a raw constructor.
879 '''
880 find_wrappable_function_with_arg0_type_cache_populate( tu)
881
882 ret = find_wrappable_function_with_arg0_type_cache.get( structname, [])
883 if state.state_.show_details(structname):
884 jlib.log('{structname=}: {len(ret)=}:')
885 for i in ret:
886 jlib.log(' {i}')
887 return ret
888 find_struct_cache = None
889
890
891 def find_class_for_wrappable_function( fn_name):
892 '''
893 If <fn_name>'s first arg is a struct and our wrapper class for this struct
894 has a method that wraps <fn_name>, return name of wrapper class.
895
896 Otherwise return None.
897 '''
898 return fnname_to_method_structname.get( fn_name)
899
900
901 def find_struct( tu, structname, require_definition=True):
902 '''
903 Finds definition of struct.
904
905 fixme: actually finds definition of anything, doesn't have to be a struct.
906
907 Args:
908 tu:
909 Translation unit.
910 structname:
911 Name of struct to find.
912 require_definition:
913 Only return cursor if it is for definition of structure.
914
915 Returns cursor for definition or None.
916 '''
917 verbose = state.state_.show_details( structname)
918 verbose = False
919 if verbose:
920 jlib.log( '{=structname}')
921 structname = util.clip( structname, ('const ', 'struct ')) # Remove any 'struct ' prefix.
922 if verbose:
923 jlib.log( '{=structname}')
924 global find_struct_cache
925 if find_struct_cache is None:
926 find_struct_cache = dict()
927 for cursor in get_children( tu.cursor):
928 already = find_struct_cache.get( cursor.spelling)
929 if already is None:
930 find_struct_cache[ cursor.spelling] = cursor
931 elif cursor.is_definition() and not already.is_definition():
932 find_struct_cache[ cursor.spelling] = cursor
933 ret = find_struct_cache.get( structname)
934 if verbose:
935 jlib.log( '{=ret}')
936 if not ret:
937 return
938 if verbose:
939 jlib.log( '{=require_definition ret.is_definition()}')
940 if require_definition and not ret.is_definition():
941 return
942 return ret
943
944
945 def find_name( cursor, name, nest=0):
946 '''
947 Returns cursor for specified name within <cursor>, or None if not found.
948
949 name:
950 Name to search for. Can contain '.' characters; we look for each
951 element in turn, calling ourselves recursively.
952
953 cursor:
954 Item to search.
955 '''
956 assert cursor.spelling != ''
957 if cursor.spelling == '':
958 # Anonymous item; this seems to occur for (non-anonymous) unions.
959 #
960 # We recurse into children directly.
961 #
962 for c in get_members(cursor):
963 ret = find_name_internal( c, name, nest+1)
964 if ret:
965 return ret
966
967 d = name.find( '.')
968 if d >= 0:
969 head, tail = name[:d], name[d+1:]
970 # Look for first element then for remaining.
971 c = find_name( cursor, head, nest+1)
972 if not c:
973 return
974 ret = find_name( c, tail, nest+2)
975 return ret
976
977 for c in get_members(cursor):
978 if c.spelling == '':
979 ret = find_name( c, name, nest+1)
980 if ret:
981 return ret
982 if c.spelling == name:
983 return c