pypy / pypy / rpython / lltypesystem / rffi.py

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
import py
from pypy.annotation import model as annmodel
from pypy.rpython.lltypesystem import lltype
from pypy.rpython.lltypesystem import ll2ctypes
from pypy.rpython.lltypesystem.llmemory import cast_adr_to_ptr, cast_ptr_to_adr
from pypy.rpython.lltypesystem.llmemory import itemoffsetof, raw_memcopy
from pypy.annotation.model import lltype_to_annotation
from pypy.tool.sourcetools import func_with_new_name
from pypy.rlib.objectmodel import Symbolic, CDefinedIntSymbolic
from pypy.rlib.objectmodel import keepalive_until_here
from pypy.rlib import rarithmetic, rgc
from pypy.rpython.extregistry import ExtRegistryEntry
from pypy.rlib.unroll import unrolling_iterable
from pypy.rpython.tool.rfficache import platform, sizeof_c_type
from pypy.translator.tool.cbuild import ExternalCompilationInfo
from pypy.rpython.annlowlevel import llhelper
from pypy.rlib.objectmodel import we_are_translated
from pypy.rlib.rstring import StringBuilder, UnicodeBuilder, assert_str0
from pypy.rlib import jit
from pypy.rpython.lltypesystem import llmemory
from pypy.rlib.rarithmetic import maxint, LONG_BIT
from pypy.translator.platform import CompilationError
import os, sys

class CConstant(Symbolic):
    """ A C-level constant, maybe #define, rendered directly.
    """
    def __init__(self, c_name, TP):
        self.c_name = c_name
        self.TP = TP

    def __repr__(self):
        return '%s(%r, %s)' % (self.__class__.__name__,
                               self.c_name, self.TP)

    def annotation(self):
        return lltype_to_annotation(self.TP)

    def lltype(self):
        return self.TP

def _isfunctype(TP):
    """ Evil hack to get rid of flow objspace inability
    to accept .TO when TP is not a pointer
    """
    return isinstance(TP, lltype.Ptr) and isinstance(TP.TO, lltype.FuncType)
_isfunctype._annspecialcase_ = 'specialize:memo'

def _isllptr(p):
    """ Second evil hack to detect if 'p' is a low-level pointer or not """
    return isinstance(p, lltype._ptr)
class _IsLLPtrEntry(ExtRegistryEntry):
    _about_ = _isllptr
    def compute_result_annotation(self, s_p):
        result = isinstance(s_p, annmodel.SomePtr)
        return self.bookkeeper.immutablevalue(result)
    def specialize_call(self, hop):
        hop.exception_cannot_occur()
        return hop.inputconst(lltype.Bool, hop.s_result.const)

def llexternal(name, args, result, _callable=None,
               compilation_info=ExternalCompilationInfo(),
               sandboxsafe=False, threadsafe='auto',
               _nowrapper=False, calling_conv='c',
               oo_primitive=None, elidable_function=False,
               macro=None, random_effects_on_gcobjs='auto'):
    """Build an external function that will invoke the C function 'name'
    with the given 'args' types and 'result' type.

    You get by default a wrapper that casts between number types as needed
    to match the arguments.  You can also pass an RPython string when a
    CCHARP argument is expected, and the C function receives a 'const char*'
    pointing to a read-only null-terminated character of arrays, as usual
    for C.

    The C function can have callbacks, but they must be specified explicitly
    as constant RPython functions.  We don't support yet C functions that
    invoke callbacks passed otherwise (e.g. set by a previous C call).

    threadsafe: whether it's ok to release the GIL around the call.
                Default is yes, unless sandboxsafe is set, in which case
                we consider that the function is really short-running and
                don't bother releasing the GIL.  An explicit True or False
                overrides this logic.
    """
    if _callable is not None:
        assert callable(_callable)
    ext_type = lltype.FuncType(args, result)
    if _callable is None:
        if macro is not None:
            if macro is True:
                macro = name
            _callable = generate_macro_wrapper(
                name, macro, ext_type, compilation_info)
        else:
            _callable = ll2ctypes.LL2CtypesCallable(ext_type, calling_conv)
    if elidable_function:
        _callable._elidable_function_ = True
    kwds = {}
    if oo_primitive:
        kwds['oo_primitive'] = oo_primitive

    has_callback = False
    for ARG in args:
        if _isfunctype(ARG):
            has_callback = True
    if has_callback:
        kwds['_callbacks'] = callbackholder = CallbackHolder()
    else:
        callbackholder = None

    if threadsafe in (False, True):
        # invoke the around-handlers, which release the GIL, if and only if
        # the C function is thread-safe.
        invoke_around_handlers = threadsafe
    else:
        # default case:
        # invoke the around-handlers only for "not too small" external calls;
        # sandboxsafe is a hint for "too-small-ness" (e.g. math functions).
        invoke_around_handlers = not sandboxsafe

    if random_effects_on_gcobjs not in (False, True):
        random_effects_on_gcobjs = (
            invoke_around_handlers or   # because it can release the GIL
            has_callback)               # because the callback can do it

    funcptr = lltype.functionptr(ext_type, name, external='C',
                                 compilation_info=compilation_info,
                                 _callable=_callable,
                                 _safe_not_sandboxed=sandboxsafe,
                                 _debugexc=True, # on top of llinterp
                                 canraise=False,
                                 random_effects_on_gcobjs=
                                     random_effects_on_gcobjs,
                                 calling_conv=calling_conv,
                                 **kwds)
    if isinstance(_callable, ll2ctypes.LL2CtypesCallable):
        _callable.funcptr = funcptr

    if _nowrapper:
        return funcptr


    if invoke_around_handlers:
        # The around-handlers are releasing the GIL in a threaded pypy.
        # We need tons of care to ensure that no GC operation and no
        # exception checking occurs while the GIL is released.

        # The actual call is done by this small piece of non-inlinable
        # generated code in order to avoid seeing any GC pointer:
        # neither '*args' nor the GC objects originally passed in as
        # argument to wrapper(), if any (e.g. RPython strings).

        argnames = ', '.join(['a%d' % i for i in range(len(args))])
        source = py.code.Source("""
            def call_external_function(%(argnames)s):
                before = aroundstate.before
                if before: before()
                # NB. it is essential that no exception checking occurs here!
                res = funcptr(%(argnames)s)
                after = aroundstate.after
                if after: after()
                return res
        """ % locals())
        miniglobals = {'aroundstate': aroundstate,
                       'funcptr':     funcptr,
                       '__name__':    __name__, # for module name propagation
                       }
        exec source.compile() in miniglobals
        call_external_function = miniglobals['call_external_function']
        call_external_function._dont_inline_ = True
        call_external_function._annspecialcase_ = 'specialize:ll'
        call_external_function._gctransformer_hint_close_stack_ = True
        call_external_function = func_with_new_name(call_external_function,
                                                    'ccall_' + name)
        # don't inline, as a hack to guarantee that no GC pointer is alive
        # anywhere in call_external_function
    else:
        # if we don't have to invoke the aroundstate, we can just call
        # the low-level function pointer carelessly
        call_external_function = funcptr

    unrolling_arg_tps = unrolling_iterable(enumerate(args))
    def wrapper(*args):
        # XXX the next line is a workaround for the annotation bug
        # shown in rpython.test.test_llann:test_pbctype.  Remove it
        # when the test is fixed...
        assert isinstance(lltype.Signed, lltype.Number)
        real_args = ()
        to_free = ()
        for i, TARGET in unrolling_arg_tps:
            arg = args[i]
            freeme = None
            if TARGET == CCHARP:
                if arg is None:
                    arg = lltype.nullptr(CCHARP.TO)   # None => (char*)NULL
                    freeme = arg
                elif isinstance(arg, str):
                    arg = str2charp(arg)
                    # XXX leaks if a str2charp() fails with MemoryError
                    # and was not the first in this function
                    freeme = arg
            elif TARGET == CWCHARP:
                if arg is None:
                    arg = lltype.nullptr(CWCHARP.TO)   # None => (wchar_t*)NULL
                    freeme = arg
                elif isinstance(arg, unicode):
                    arg = unicode2wcharp(arg)
                    # XXX leaks if a unicode2wcharp() fails with MemoryError
                    # and was not the first in this function
                    freeme = arg
            elif TARGET is VOIDP:
                if arg is None:
                    arg = lltype.nullptr(VOIDP.TO)
                elif isinstance(arg, str):
                    arg = str2charp(arg)
                    freeme = arg
                elif isinstance(arg, unicode):
                    arg = unicode2wcharp(arg)
                    freeme = arg
            elif _isfunctype(TARGET) and not _isllptr(arg):
                # XXX pass additional arguments
                if invoke_around_handlers:
                    arg = llhelper(TARGET, _make_wrapper_for(TARGET, arg,
                                                             callbackholder,
                                                             aroundstate))
                else:
                    arg = llhelper(TARGET, _make_wrapper_for(TARGET, arg,
                                                             callbackholder))
            else:
                SOURCE = lltype.typeOf(arg)
                if SOURCE != TARGET:
                    if TARGET is lltype.Float:
                        arg = float(arg)
                    elif ((isinstance(SOURCE, lltype.Number)
                           or SOURCE is lltype.Bool)
                      and (isinstance(TARGET, lltype.Number)
                           or TARGET is lltype.Bool)):
                        arg = cast(TARGET, arg)
            real_args = real_args + (arg,)
            to_free = to_free + (freeme,)
        res = call_external_function(*real_args)
        for i, TARGET in unrolling_arg_tps:
            if to_free[i]:
                lltype.free(to_free[i], flavor='raw')
        if rarithmetic.r_int is not r_int:
            if result is INT:
                return cast(lltype.Signed, res)
            elif result is UINT:
                return cast(lltype.Unsigned, res)
        return res
    wrapper._annspecialcase_ = 'specialize:ll'
    wrapper._always_inline_ = 'try'
    # for debugging, stick ll func ptr to that
    wrapper._ptr = funcptr
    wrapper = func_with_new_name(wrapper, name)

    if calling_conv != "c":
        wrapper = jit.dont_look_inside(wrapper)

    return wrapper


class CallbackHolder:
    def __init__(self):
        self.callbacks = {}

def _make_wrapper_for(TP, callable, callbackholder=None, aroundstate=None):
    """ Function creating wrappers for callbacks. Note that this is
    cheating as we assume constant callbacks and we just memoize wrappers
    """
    from pypy.rpython.lltypesystem import lltype
    from pypy.rpython.lltypesystem.lloperation import llop
    if hasattr(callable, '_errorcode_'):
        errorcode = callable._errorcode_
    else:
        errorcode = TP.TO.RESULT._defl()
    callable_name = getattr(callable, '__name__', '?')
    if callbackholder is not None:
        callbackholder.callbacks[callable] = True
    args = ', '.join(['a%d' % i for i in range(len(TP.TO.ARGS))])
    source = py.code.Source(r"""
        def wrapper(%s):    # no *args - no GIL for mallocing the tuple
            llop.gc_stack_bottom(lltype.Void)   # marker for trackgcroot.py
            if aroundstate is not None:
                after = aroundstate.after
                if after:
                    after()
            # from now on we hold the GIL
            stackcounter.stacks_counter += 1
            try:
                result = callable(%s)
            except Exception, e:
                os.write(2,
                    "Warning: uncaught exception in callback: %%s %%s\n" %%
                    (callable_name, str(e)))
                if not we_are_translated():
                    import traceback
                    traceback.print_exc()
                result = errorcode
            stackcounter.stacks_counter -= 1
            if aroundstate is not None:
                before = aroundstate.before
                if before:
                    before()
            # here we don't hold the GIL any more. As in the wrapper() produced
            # by llexternal, it is essential that no exception checking occurs
            # after the call to before().
            return result
    """ % (args, args))
    miniglobals = locals().copy()
    miniglobals['Exception'] = Exception
    miniglobals['os'] = os
    miniglobals['we_are_translated'] = we_are_translated
    miniglobals['stackcounter'] = stackcounter
    exec source.compile() in miniglobals
    return miniglobals['wrapper']
_make_wrapper_for._annspecialcase_ = 'specialize:memo'

AroundFnPtr = lltype.Ptr(lltype.FuncType([], lltype.Void))
class AroundState:
    def _cleanup_(self):
        self.before = None    # or a regular RPython function
        self.after = None     # or a regular RPython function
aroundstate = AroundState()
aroundstate._cleanup_()

class StackCounter:
    def _cleanup_(self):
        self.stacks_counter = 1     # number of "stack pieces": callbacks
                                    # and threads increase it by one
stackcounter = StackCounter()
stackcounter._cleanup_()

def llexternal_use_eci(compilation_info):
    """Return a dummy function that, if called in a RPython program,
    adds the given ExternalCompilationInfo to it."""
    eci = ExternalCompilationInfo(post_include_bits=['#define PYPY_NO_OP()'])
    eci = eci.merge(compilation_info)
    return llexternal('PYPY_NO_OP', [], lltype.Void,
                      compilation_info=eci, sandboxsafe=True, _nowrapper=True,
                      _callable=lambda: None)

def generate_macro_wrapper(name, macro, functype, eci):
    """Wraps a function-like macro inside a real function, and expose
    it with llexternal."""

    # Generate the function call
    from pypy.translator.c.database import LowLevelDatabase
    from pypy.translator.c.support import cdecl
    wrapper_name = 'pypy_macro_wrapper_%s' % (name,)
    argnames = ['arg%d' % (i,) for i in range(len(functype.ARGS))]
    db = LowLevelDatabase()
    implementationtypename = db.gettype(functype, argnames=argnames)
    if functype.RESULT is lltype.Void:
        pattern = '%s { %s(%s); }'
    else:
        pattern = '%s { return %s(%s); }'
    source = pattern % (
        cdecl(implementationtypename, wrapper_name),
        macro, ', '.join(argnames))

    # Now stuff this source into a "companion" eci that will be used
    # by ll2ctypes.  We replace eci._with_ctypes, so that only one
    # shared library is actually compiled (when ll2ctypes calls the
    # first function)
    ctypes_eci = eci.merge(ExternalCompilationInfo(
            separate_module_sources=[source],
            export_symbols=[wrapper_name],
            ))
    if hasattr(eci, '_with_ctypes'):
        ctypes_eci = eci._with_ctypes.merge(ctypes_eci)
    eci._with_ctypes = ctypes_eci
    func = llexternal(wrapper_name, functype.ARGS, functype.RESULT,
                      compilation_info=eci, _nowrapper=True)
    # _nowrapper=True returns a pointer which is not hashable
    return lambda *args: func(*args)

# ____________________________________________________________
# Few helpers for keeping callback arguments alive
# this makes passing opaque objects possible (they don't even pass
# through C, only integer specifying number passes)

_KEEPER_CACHE = {}

def _keeper_for_type(TP):
    try:
        return _KEEPER_CACHE[TP]
    except KeyError:
        tp_str = str(TP) # make annotator happy
        class KeepaliveKeeper(object):
            def __init__(self):
                self.stuff_to_keepalive = []
                self.free_positions = []
        keeper = KeepaliveKeeper()
        _KEEPER_CACHE[TP] = keeper
        return keeper
_keeper_for_type._annspecialcase_ = 'specialize:memo'

def register_keepalive(obj):
    """ Register object obj to be kept alive,
    returns a position for that object
    """
    keeper = _keeper_for_type(lltype.typeOf(obj))
    if len(keeper.free_positions):
        pos = keeper.free_positions.pop()
        keeper.stuff_to_keepalive[pos] = obj
        return pos
    # we don't have any free positions
    pos = len(keeper.stuff_to_keepalive)
    keeper.stuff_to_keepalive.append(obj)
    return pos
register_keepalive._annspecialcase_ = 'specialize:argtype(0)'

def get_keepalive_object(pos, TP):
    keeper = _keeper_for_type(TP)
    return keeper.stuff_to_keepalive[pos]
get_keepalive_object._annspecialcase_ = 'specialize:arg(1)'

def unregister_keepalive(pos, TP):
    """ Unregister an object of type TP, stored at position
    pos (position previously returned by register_keepalive)
    """
    keeper = _keeper_for_type(TP)
    keeper.stuff_to_keepalive[pos] = None
    keeper.free_positions.append(pos)
unregister_keepalive._annspecialcase_ = 'specialize:arg(1)'

# ____________________________________________________________

TYPES = []
for _name in 'short int long'.split():
    for name in (_name, 'unsigned ' + _name):
        TYPES.append(name)
TYPES += ['signed char', 'unsigned char',
          'long long', 'unsigned long long',
          'size_t', 'time_t', 'wchar_t',
          'uintptr_t', 'intptr_t',
          'void*']    # generic pointer type

# This is a bit of a hack since we can't use rffi_platform here.
try:
    sizeof_c_type('__int128_t', ignore_errors=True)
    TYPES += ['__int128_t']
except CompilationError:
    pass
    
_TYPES_ARE_UNSIGNED = set(['size_t', 'uintptr_t'])   # plus "unsigned *"
if os.name != 'nt':
    TYPES.append('mode_t')
    TYPES.append('pid_t')
    TYPES.append('ssize_t')
else:
    MODE_T = lltype.Signed
    PID_T = lltype.Signed
    SSIZE_T = lltype.Signed

def populate_inttypes():
    names = []
    populatelist = []
    for name in TYPES:
        c_name = name
        if name.startswith('unsigned'):
            name = 'u' + name[9:]
            signed = False
        else:
            signed = (name not in _TYPES_ARE_UNSIGNED)
        name = name.replace(' ', '')
        names.append(name)
        populatelist.append((name.upper(), c_name, signed))
    platform.populate_inttypes(populatelist)
    return names

def setup():
    """ creates necessary c-level types
    """
    names = populate_inttypes()
    result = []
    for name in names:
        tp = platform.types[name.upper()]
        globals()['r_' + name] = platform.numbertype_to_rclass[tp]
        globals()[name.upper()] = tp
        tpp = lltype.Ptr(lltype.Array(tp, hints={'nolength': True}))
        globals()[name.upper()+'P'] = tpp
        result.append(tp)
    return result

NUMBER_TYPES = setup()
platform.numbertype_to_rclass[lltype.Signed] = int     # avoid "r_long" for common cases
r_int_real = rarithmetic.build_int("r_int_real", r_int.SIGN, r_int.BITS, True)
INT_real = lltype.build_number("INT", r_int_real)
platform.numbertype_to_rclass[INT_real] = r_int_real
NUMBER_TYPES.append(INT_real)

# ^^^ this creates at least the following names:
# --------------------------------------------------------------------
#        Type           RPython integer class doing wrap-around
# --------------------------------------------------------------------
#        SIGNEDCHAR     r_signedchar
#        UCHAR          r_uchar
#        SHORT          r_short
#        USHORT         r_ushort
#        INT            r_int
#        UINT           r_uint
#        LONG           r_long
#        ULONG          r_ulong
#        LONGLONG       r_longlong
#        ULONGLONG      r_ulonglong
#        WCHAR_T        r_wchar_t
#        SIZE_T         r_size_t
#        SSIZE_T        r_ssize_t
#        TIME_T         r_time_t
# --------------------------------------------------------------------
# Note that rffi.r_int is not necessarily the same as
# rarithmetic.r_int, etc!  rffi.INT/r_int correspond to the C-level
# 'int' type, whereas rarithmetic.r_int corresponds to the
# Python-level int type (which is a C long).  Fun.

def CStruct(name, *fields, **kwds):
    """ A small helper to create external C structure, not the
    pypy one
    """
    hints = kwds.get('hints', {})
    hints = hints.copy()
    kwds['hints'] = hints
    hints['external'] = 'C'
    hints['c_name'] = name
    # Hack: prefix all attribute names with 'c_' to cope with names starting
    # with '_'.  The genc backend removes the 'c_' prefixes...
    c_fields = [('c_' + key, value) for key, value in fields]
    return lltype.Struct(name, *c_fields, **kwds)

def CStructPtr(*args, **kwds):
    return lltype.Ptr(CStruct(*args, **kwds))

def CFixedArray(tp, size):
    return lltype.FixedSizeArray(tp, size)
CFixedArray._annspecialcase_ = 'specialize:memo'

def CArray(tp):
    return lltype.Array(tp, hints={'nolength': True})
CArray._annspecialcase_ = 'specialize:memo'

def CArrayPtr(tp):
    return lltype.Ptr(CArray(tp))
CArrayPtr._annspecialcase_ = 'specialize:memo'

def CCallback(args, res):
    return lltype.Ptr(lltype.FuncType(args, res))
CCallback._annspecialcase_ = 'specialize:memo'

def COpaque(name=None, ptr_typedef=None, hints=None, compilation_info=None):
    if compilation_info is None:
        compilation_info = ExternalCompilationInfo()
    if hints is None:
        hints = {}
    else:
        hints = hints.copy()
    hints['external'] = 'C'
    if name is not None:
        hints['c_name'] = name
    if ptr_typedef is not None:
        hints['c_pointer_typedef'] = ptr_typedef
    def lazy_getsize(cache={}):
        from pypy.rpython.tool import rffi_platform
        try:
            return cache[name]
        except KeyError:
            val = rffi_platform.sizeof(name, compilation_info)
            cache[name] = val
            return val

    hints['getsize'] = lazy_getsize
    return lltype.OpaqueType(name, hints)

def COpaquePtr(*args, **kwds):
    typedef = kwds.pop('typedef', None)
    return lltype.Ptr(COpaque(ptr_typedef=typedef, *args, **kwds))

def CExternVariable(TYPE, name, eci, _CConstantClass=CConstant,
                    sandboxsafe=False, _nowrapper=False,
                    c_type=None):
    """Return a pair of functions - a getter and a setter - to access
    the given global C variable.
    """
    from pypy.translator.c.primitive import PrimitiveType
    from pypy.translator.tool.cbuild import ExternalCompilationInfo
    # XXX we cannot really enumerate all C types here, do it on a case-by-case
    #     basis
    if c_type is None:
        if TYPE == CCHARPP:
            c_type = 'char **'
        elif TYPE == CCHARP:
            c_type = 'char *'
        elif TYPE == INT or TYPE == LONG:
            assert False, "ambiguous type on 32-bit machines: give a c_type"
        else:
            c_type = PrimitiveType[TYPE]
            assert c_type.endswith(' @')
            c_type = c_type[:-2] # cut the trailing ' @'

    getter_name = 'get_' + name
    setter_name = 'set_' + name
    getter_prototype = "%(c_type)s %(getter_name)s ();" % locals()
    setter_prototype = "void %(setter_name)s (%(c_type)s v);" % locals()
    c_getter = "%(c_type)s %(getter_name)s () { return %(name)s; }" % locals()
    c_setter = "void %(setter_name)s (%(c_type)s v) { %(name)s = v; }" % locals()

    lines = ["#include <%s>" % i for i in eci.includes]
    if sys.platform != 'win32':
        lines.append('extern %s %s;' % (c_type, name))
    lines.append(c_getter)
    lines.append(c_setter)
    sources = ('\n'.join(lines),)
    new_eci = eci.merge(ExternalCompilationInfo(
        separate_module_sources = sources,
        post_include_bits = [getter_prototype, setter_prototype],
        export_symbols = [getter_name, setter_name],
    ))

    getter = llexternal(getter_name, [], TYPE, compilation_info=new_eci,
                        sandboxsafe=sandboxsafe, _nowrapper=_nowrapper)
    setter = llexternal(setter_name, [TYPE], lltype.Void,
                        compilation_info=new_eci, sandboxsafe=sandboxsafe,
                        _nowrapper=_nowrapper)
    return getter, setter

# char, represented as a Python character
# (use SIGNEDCHAR or UCHAR for the small integer types)
CHAR = lltype.Char

# double
DOUBLE = lltype.Float
LONGDOUBLE = lltype.LongFloat

# float - corresponds to pypy.rlib.rarithmetic.r_float, and supports no
#         operation except rffi.cast() between FLOAT and DOUBLE
FLOAT = lltype.SingleFloat
r_singlefloat = rarithmetic.r_singlefloat

# void *   - for now, represented as char *
VOIDP = lltype.Ptr(lltype.Array(lltype.Char, hints={'nolength': True, 'render_as_void': True}))
NULL = None

# void **
VOIDPP = CArrayPtr(VOIDP)

# char *
CCHARP = lltype.Ptr(lltype.Array(lltype.Char, hints={'nolength': True}))

# wchar_t *
CWCHARP = lltype.Ptr(lltype.Array(lltype.UniChar, hints={'nolength': True}))

# int *, unsigned int *, etc.
#INTP = ...    see setup() above

# double *
DOUBLEP = lltype.Ptr(lltype.Array(DOUBLE, hints={'nolength': True}))

# float *
FLOATP = lltype.Ptr(lltype.Array(FLOAT, hints={'nolength': True}))

# long double *
LONGDOUBLEP = lltype.Ptr(lltype.Array(LONGDOUBLE, hints={'nolength': True}))

# Signed, Signed *
SIGNED = lltype.Signed
SIGNEDP = lltype.Ptr(lltype.Array(SIGNED, hints={'nolength': True}))

# various type mapping

# conversions between str and char*
# conversions between unicode and wchar_t*
def make_string_mappings(strtype):

    if strtype is str:
        from pypy.rpython.lltypesystem.rstr import STR as STRTYPE
        from pypy.rpython.annlowlevel import llstr as llstrtype
        from pypy.rpython.annlowlevel import hlstr as hlstrtype
        TYPEP = CCHARP
        ll_char_type = lltype.Char
        lastchar = '\x00'
        builder_class = StringBuilder
    else:
        from pypy.rpython.lltypesystem.rstr import UNICODE as STRTYPE
        from pypy.rpython.annlowlevel import llunicode as llstrtype
        from pypy.rpython.annlowlevel import hlunicode as hlstrtype
        TYPEP = CWCHARP
        ll_char_type = lltype.UniChar
        lastchar = u'\x00'
        builder_class = UnicodeBuilder

    # str -> char*
    def str2charp(s):
        """ str -> char*
        """
        array = lltype.malloc(TYPEP.TO, len(s) + 1, flavor='raw')
        i = len(s)
        array[i] = lastchar
        i -= 1
        while i >= 0:
            array[i] = s[i]
            i -= 1
        return array
    str2charp._annenforceargs_ = [strtype]

    def free_charp(cp):
        lltype.free(cp, flavor='raw')

    # char* -> str
    # doesn't free char*
    def charp2str(cp):
        size = 0
        while cp[size] != lastchar:
            size += 1
        b = builder_class(size)
        i = 0
        while cp[i] != lastchar:
            b.append(cp[i])
            i += 1
        return assert_str0(b.build())

    # str -> char*
    # Can't inline this because of the raw address manipulation.
    @jit.dont_look_inside
    def get_nonmovingbuffer(data):
        """
        Either returns a non-moving copy or performs neccessary pointer
        arithmetic to return a pointer to the characters of a string if the
        string is already nonmovable.  Must be followed by a
        free_nonmovingbuffer call.
        """
        if rgc.can_move(data):
            count = len(data)
            buf = lltype.malloc(TYPEP.TO, count, flavor='raw')
            for i in range(count):
                buf[i] = data[i]
            return buf
        else:
            data_start = cast_ptr_to_adr(llstrtype(data)) + \
                offsetof(STRTYPE, 'chars') + itemoffsetof(STRTYPE.chars, 0)
            return cast(TYPEP, data_start)
    get_nonmovingbuffer._annenforceargs_ = [strtype]

    # (str, char*) -> None
    # Can't inline this because of the raw address manipulation.
    @jit.dont_look_inside
    def free_nonmovingbuffer(data, buf):
        """
        Either free a non-moving buffer or keep the original storage alive.
        """
        # We cannot rely on rgc.can_move(data) here, because its result
        # might have changed since get_nonmovingbuffer().  Instead we check
        # if 'buf' points inside 'data'.  This is only possible if we
        # followed the 2nd case in get_nonmovingbuffer(); in the first case,
        # 'buf' points to its own raw-malloced memory.
        data = llstrtype(data)
        data_start = cast_ptr_to_adr(data) + \
            offsetof(STRTYPE, 'chars') + itemoffsetof(STRTYPE.chars, 0)
        followed_2nd_path = (buf == cast(TYPEP, data_start))
        keepalive_until_here(data)
        if not followed_2nd_path:
            lltype.free(buf, flavor='raw')
    free_nonmovingbuffer._annenforceargs_ = [strtype, None]

    # int -> (char*, str)
    def alloc_buffer(count):
        """
        Returns a (raw_buffer, gc_buffer) pair, allocated with count bytes.
        The raw_buffer can be safely passed to a native function which expects
        it to not move. Call str_from_buffer with the returned values to get a
        safe high-level string. When the garbage collector cooperates, this
        allows for the process to be performed without an extra copy.
        Make sure to call keep_buffer_alive_until_here on the returned values.
        """
        raw_buf = lltype.malloc(TYPEP.TO, count, flavor='raw')
        return raw_buf, lltype.nullptr(STRTYPE)
    alloc_buffer._always_inline_ = 'try' # to get rid of the returned tuple
    alloc_buffer._annenforceargs_ = [int]

    # (char*, str, int, int) -> None
    @jit.dont_look_inside
    def str_from_buffer(raw_buf, gc_buf, allocated_size, needed_size):
        """
        Converts from a pair returned by alloc_buffer to a high-level string.
        The returned string will be truncated to needed_size.
        """
        assert allocated_size >= needed_size

        if gc_buf and (allocated_size == needed_size):
            return hlstrtype(gc_buf)

        new_buf = lltype.malloc(STRTYPE, needed_size)
        str_chars_offset = (offsetof(STRTYPE, 'chars') + \
                            itemoffsetof(STRTYPE.chars, 0))
        if gc_buf:
            src = cast_ptr_to_adr(gc_buf) + str_chars_offset
        else:
            src = cast_ptr_to_adr(raw_buf) + itemoffsetof(TYPEP.TO, 0)
        dest = cast_ptr_to_adr(new_buf) + str_chars_offset
        raw_memcopy(src, dest,
                    llmemory.sizeof(ll_char_type) * needed_size)
        keepalive_until_here(gc_buf)
        keepalive_until_here(new_buf)
        return hlstrtype(new_buf)

    # (char*, str) -> None
    @jit.dont_look_inside
    def keep_buffer_alive_until_here(raw_buf, gc_buf):
        """
        Keeps buffers alive or frees temporary buffers created by alloc_buffer.
        This must be called after a call to alloc_buffer, usually in a
        try/finally block.
        """
        if gc_buf:
            keepalive_until_here(gc_buf)
        elif raw_buf:
            lltype.free(raw_buf, flavor='raw')

    # char* -> str, with an upper bound on the length in case there is no \x00
    def charp2strn(cp, maxlen):
        b = builder_class(maxlen)
        i = 0
        while i < maxlen and cp[i] != lastchar:
            b.append(cp[i])
            i += 1
        return assert_str0(b.build())

    # char* and size -> str (which can contain null bytes)
    def charpsize2str(cp, size):
        b = builder_class(size)
        b.append_charpsize(cp, size)
        return b.build()
    charpsize2str._annenforceargs_ = [None, int]

    return (str2charp, free_charp, charp2str,
            get_nonmovingbuffer, free_nonmovingbuffer,
            alloc_buffer, str_from_buffer, keep_buffer_alive_until_here,
            charp2strn, charpsize2str,
            )

(str2charp, free_charp, charp2str,
 get_nonmovingbuffer, free_nonmovingbuffer,
 alloc_buffer, str_from_buffer, keep_buffer_alive_until_here,
 charp2strn, charpsize2str,
 ) = make_string_mappings(str)

(unicode2wcharp, free_wcharp, wcharp2unicode,
 get_nonmoving_unicodebuffer, free_nonmoving_unicodebuffer,
 alloc_unicodebuffer, unicode_from_buffer, keep_unicodebuffer_alive_until_here,
 wcharp2unicoden, wcharpsize2unicode,
 ) = make_string_mappings(unicode)

# char**
CCHARPP = lltype.Ptr(lltype.Array(CCHARP, hints={'nolength': True}))

def liststr2charpp(l):
    """ list[str] -> char**, NULL terminated
    """
    array = lltype.malloc(CCHARPP.TO, len(l) + 1, flavor='raw')
    for i in range(len(l)):
        array[i] = str2charp(l[i])
    array[len(l)] = lltype.nullptr(CCHARP.TO)
    return array
liststr2charpp._annenforceargs_ = [[annmodel.s_Str0]]  # List of strings
# Make a copy for the ll_os.py module
ll_liststr2charpp = func_with_new_name(liststr2charpp, 'll_liststr2charpp')

def free_charpp(ref):
    """ frees list of char**, NULL terminated
    """
    i = 0
    while ref[i]:
        free_charp(ref[i])
        i += 1
    lltype.free(ref, flavor='raw')

def charpp2liststr(p):
    """ char** NULL terminated -> list[str].  No freeing is done.
    """
    result = []
    i = 0
    while p[i]:
        result.append(charp2str(p[i]))
        i += 1
    return result

cast = ll2ctypes.force_cast      # a forced, no-checking cast

ptradd = ll2ctypes.force_ptradd  # equivalent of "ptr + n" in C.
                                 # the ptr must point to an array.

def size_and_sign(tp):
    size = sizeof(tp)
    try:
        unsigned = not tp._type.SIGNED
    except AttributeError:
        if not isinstance(tp, lltype.Primitive):
            unsigned = False
        elif tp in (lltype.Signed, FLOAT, DOUBLE, llmemory.Address):
            unsigned = False
        elif tp in (lltype.Char, lltype.UniChar, lltype.Bool):
            unsigned = True
        else:
            raise AssertionError("size_and_sign(%r)" % (tp,))
    return size, unsigned

def sizeof(tp):
    """Similar to llmemory.sizeof() but tries hard to return a integer
    instead of a symbolic value.
    """
    if isinstance(tp, lltype.Typedef):
        tp = tp.OF
    if isinstance(tp, lltype.FixedSizeArray):
        return sizeof(tp.OF) * tp.length
    if isinstance(tp, lltype.Struct):
        # the hint is present in structures probed by rffi_platform.
        size = tp._hints.get('size')
        if size is None:
            size = llmemory.sizeof(tp)    # a symbolic result in this case
        return size
    if isinstance(tp, lltype.Ptr) or tp is llmemory.Address:
        return globals()['r_void*'].BITS/8
    if tp is lltype.Char or tp is lltype.Bool:
        return 1
    if tp is lltype.UniChar:
        return r_wchar_t.BITS/8
    if tp is lltype.Float:
        return 8
    if tp is lltype.SingleFloat:
        return 4
    if tp is lltype.LongFloat:
        if globals()['r_void*'].BITS == 32:
            return 12
        else:
            return 16
    assert isinstance(tp, lltype.Number)
    if tp is lltype.Signed:
        return LONG_BIT/8
    return tp._type.BITS/8
sizeof._annspecialcase_ = 'specialize:memo'

def offsetof(STRUCT, fieldname):
    """Similar to llmemory.offsetof() but tries hard to return a integer
    instead of a symbolic value.
    """
    # the hint is present in structures probed by rffi_platform.
    fieldoffsets = STRUCT._hints.get('fieldoffsets')
    if fieldoffsets is not None:
        # a numeric result when known
        for index, name in enumerate(STRUCT._names):
            if name == fieldname:
                return fieldoffsets[index]
    # a symbolic result as a fallback
    return llmemory.offsetof(STRUCT, fieldname)
offsetof._annspecialcase_ = 'specialize:memo'

# check that we have a sane configuration
assert maxint == (1 << (8 * sizeof(llmemory.Address) - 1)) - 1, (
    "Mixed configuration of the word size of the machine:\n\t"
    "the underlying Python was compiled with maxint=%d,\n\t"
    "but the C compiler says that 'void *' is %d bytes" % (
    maxint, sizeof(llmemory.Address)))
assert sizeof(lltype.Signed) == sizeof(llmemory.Address), (
    "Bad configuration: we should manage to get lltype.Signed "
    "be an integer type of the same size as llmemory.Address, "
    "but we got %s != %s" % (sizeof(lltype.Signed),
                             sizeof(llmemory.Address)))

# ********************** some helpers *******************

def make(STRUCT, **fields):
    """ Malloc a structure and populate it's fields
    """
    ptr = lltype.malloc(STRUCT, flavor='raw')
    for name, value in fields.items():
        setattr(ptr, name, value)
    return ptr

class MakeEntry(ExtRegistryEntry):
    _about_ = make

    def compute_result_annotation(self, s_type, **s_fields):
        TP = s_type.const
        if not isinstance(TP, lltype.Struct):
            raise TypeError("make called with %s instead of Struct as first argument" % TP)
        return annmodel.SomePtr(lltype.Ptr(TP))

    def specialize_call(self, hop, **fields):
        assert hop.args_s[0].is_constant()
        vlist = [hop.inputarg(lltype.Void, arg=0)]
        flags = {'flavor':'raw'}
        vlist.append(hop.inputconst(lltype.Void, flags))
        hop.has_implicit_exception(MemoryError)   # record that we know about it
        hop.exception_is_here()
        v_ptr = hop.genop('malloc', vlist, resulttype=hop.r_result.lowleveltype)
        for name, i in fields.items():
            name = name[2:]
            v_arg = hop.inputarg(hop.args_r[i], arg=i)
            v_name = hop.inputconst(lltype.Void, name)
            hop.genop('setfield', [v_ptr, v_name, v_arg])
        return v_ptr


def structcopy(pdst, psrc):
    """Copy all the fields of the structure given by 'psrc'
    into the structure given by 'pdst'.
    """
    copy_fn = _get_structcopy_fn(lltype.typeOf(pdst), lltype.typeOf(psrc))
    copy_fn(pdst, psrc)
structcopy._annspecialcase_ = 'specialize:ll'

def _get_structcopy_fn(PDST, PSRC):
    assert PDST == PSRC
    if isinstance(PDST.TO, lltype.Struct):
        STRUCT = PDST.TO
        padding = STRUCT._hints.get('padding', ())
        fields = [(name, STRUCT._flds[name]) for name in STRUCT._names
                                             if name not in padding]
        unrollfields = unrolling_iterable(fields)

        def copyfn(pdst, psrc):
            for name, TYPE in unrollfields:
                if isinstance(TYPE, lltype.ContainerType):
                    structcopy(getattr(pdst, name), getattr(psrc, name))
                else:
                    setattr(pdst, name, getattr(psrc, name))

        return copyfn
    else:
        raise NotImplementedError('structcopy: type %r' % (PDST.TO,))
_get_structcopy_fn._annspecialcase_ = 'specialize:memo'


def setintfield(pdst, fieldname, value):
    """Maybe temporary: a helper to set an integer field into a structure,
    transparently casting between the various integer types.
    """
    STRUCT = lltype.typeOf(pdst).TO
    TSRC = lltype.typeOf(value)
    TDST = getattr(STRUCT, fieldname)
    assert isinstance(TSRC, lltype.Number)
    assert isinstance(TDST, lltype.Number)
    setattr(pdst, fieldname, cast(TDST, value))
setintfield._annspecialcase_ = 'specialize:ll_and_arg(1)'

def getintfield(pdst, fieldname):
    """As temporary as previous: get integer from a field in structure,
    casting it to lltype.Signed
    """
    return cast(lltype.Signed, getattr(pdst, fieldname))
getintfield._annspecialcase_ = 'specialize:ll_and_arg(1)'

class scoped_str2charp:
    def __init__(self, value):
        if value is not None:
            self.buf = str2charp(value)
        else:
            self.buf = lltype.nullptr(CCHARP.TO)
    def __enter__(self):
        return self.buf
    def __exit__(self, *args):
        if self.buf:
            free_charp(self.buf)


class scoped_unicode2wcharp:
    def __init__(self, value):
        if value is not None:
            self.buf = unicode2wcharp(value)
        else:
            self.buf = lltype.nullptr(CWCHARP.TO)
    def __enter__(self):
        return self.buf
    def __exit__(self, *args):
        if self.buf:
            free_wcharp(self.buf)


class scoped_nonmovingbuffer:
    def __init__(self, data):
        self.data = data
    def __enter__(self):
        self.buf = get_nonmovingbuffer(self.data)
        return self.buf
    def __exit__(self, *args):
        free_nonmovingbuffer(self.data, self.buf)


class scoped_nonmoving_unicodebuffer:
    def __init__(self, data):
        self.data = data
    def __enter__(self):
        self.buf = get_nonmoving_unicodebuffer(self.data)
        return self.buf
    def __exit__(self, *args):
        free_nonmoving_unicodebuffer(self.data, self.buf)

class scoped_alloc_buffer:
    def __init__(self, size):
        self.size = size
    def __enter__(self):
        self.raw, self.gc_buf = alloc_buffer(self.size)
        return self
    def __exit__(self, *args):
        keep_buffer_alive_until_here(self.raw, self.gc_buf)
    def str(self, length):
        return str_from_buffer(self.raw, self.gc_buf, self.size, length)

class scoped_alloc_unicodebuffer:
    def __init__(self, size):
        self.size = size
    def __enter__(self):
        self.raw, self.gc_buf = alloc_unicodebuffer(self.size)
        return self
    def __exit__(self, *args):
        keep_unicodebuffer_alive_until_here(self.raw, self.gc_buf)
    def str(self, length):
        return unicode_from_buffer(self.raw, self.gc_buf, self.size, length)

# You would have to have a *huge* amount of data for this to block long enough
# to be worth it to release the GIL.
c_memcpy = llexternal("memcpy",
    [VOIDP, VOIDP, SIZE_T],
    lltype.Void,
    threadsafe=False
)
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.