CXType.cpp revision 6a01012e6bffa246810dc5c655a9a30082331fb2 
1//===- CXTypes.cpp - Implements 'CXTypes' aspect of libclang ------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===--------------------------------------------------------------------===//
9//
10// This file implements the 'CXTypes' API hooks in the Clang-C library.
11//
12//===--------------------------------------------------------------------===//
13
14#include "CIndexer.h"
15#include "CXTranslationUnit.h"
16#include "CXCursor.h"
17#include "CXString.h"
18#include "CXType.h"
19#include "clang/AST/Expr.h"
20#include "clang/AST/Type.h"
21#include "clang/AST/Decl.h"
22#include "clang/AST/DeclObjC.h"
23#include "clang/AST/DeclTemplate.h"
24#include "clang/Frontend/ASTUnit.h"
25
26using namespace clang;
27
28static CXTypeKind GetBuiltinTypeKind(const BuiltinType *BT) {
29#define BTCASE(K) case BuiltinType::K: return CXType_##K
30  switch (BT->getKind()) {
31    BTCASE(Void);
32    BTCASE(Bool);
33    BTCASE(Char_U);
34    BTCASE(UChar);
35    BTCASE(Char16);
36    BTCASE(Char32);
37    BTCASE(UShort);
38    BTCASE(UInt);
39    BTCASE(ULong);
40    BTCASE(ULongLong);
41    BTCASE(UInt128);
42    BTCASE(Char_S);
43    BTCASE(SChar);
44    case BuiltinType::WChar_S: return CXType_WChar;
45    case BuiltinType::WChar_U: return CXType_WChar;
46    BTCASE(Short);
47    BTCASE(Int);
48    BTCASE(Long);
49    BTCASE(LongLong);
50    BTCASE(Int128);
51    BTCASE(Float);
52    BTCASE(Double);
53    BTCASE(LongDouble);
54    BTCASE(NullPtr);
55    BTCASE(Overload);
56    BTCASE(Dependent);
57    BTCASE(ObjCId);
58    BTCASE(ObjCClass);
59    BTCASE(ObjCSel);
60  default:
61    return CXType_Unexposed;
62  }
63#undef BTCASE
64}
65
66static CXTypeKind GetTypeKind(QualType T) {
67  const Type *TP = T.getTypePtrOrNull();
68  if (!TP)
69    return CXType_Invalid;
70
71#define TKCASE(K) case Type::K: return CXType_##K
72  switch (TP->getTypeClass()) {
73    case Type::Builtin:
74      return GetBuiltinTypeKind(cast<BuiltinType>(TP));
75    TKCASE(Complex);
76    TKCASE(Pointer);
77    TKCASE(BlockPointer);
78    TKCASE(LValueReference);
79    TKCASE(RValueReference);
80    TKCASE(Record);
81    TKCASE(Enum);
82    TKCASE(Typedef);
83    TKCASE(ObjCInterface);
84    TKCASE(ObjCObjectPointer);
85    TKCASE(FunctionNoProto);
86    TKCASE(FunctionProto);
87    TKCASE(ConstantArray);
88    TKCASE(Vector);
89    default:
90      return CXType_Unexposed;
91  }
92#undef TKCASE
93}
94
95
96CXType cxtype::MakeCXType(QualType T, CXTranslationUnit TU) {
97  CXTypeKind TK = CXType_Invalid;
98
99  if (TU && !T.isNull()) {
100    ASTContext &Ctx = static_cast<ASTUnit *>(TU->TUData)->getASTContext();
101    if (Ctx.getLangOpts().ObjC1) {
102      QualType UnqualT = T.getUnqualifiedType();
103      if (Ctx.isObjCIdType(UnqualT))
104        TK = CXType_ObjCId;
105      else if (Ctx.isObjCClassType(UnqualT))
106        TK = CXType_ObjCClass;
107      else if (Ctx.isObjCSelType(UnqualT))
108        TK = CXType_ObjCSel;
109    }
110  }
111  if (TK == CXType_Invalid)
112    TK = GetTypeKind(T);
113
114  CXType CT = { TK, { TK == CXType_Invalid ? 0 : T.getAsOpaquePtr(), TU }};
115  return CT;
116}
117
118using cxtype::MakeCXType;
119
120static inline QualType GetQualType(CXType CT) {
121  return QualType::getFromOpaquePtr(CT.data[0]);
122}
123
124static inline CXTranslationUnit GetTU(CXType CT) {
125  return static_cast<CXTranslationUnit>(CT.data[1]);
126}
127
128extern "C" {
129
130CXType clang_getCursorType(CXCursor C) {
131  using namespace cxcursor;
132
133  CXTranslationUnit TU = cxcursor::getCursorTU(C);
134  ASTContext &Context = static_cast<ASTUnit *>(TU->TUData)->getASTContext();
135  if (clang_isExpression(C.kind)) {
136    QualType T = cxcursor::getCursorExpr(C)->getType();
137    return MakeCXType(T, TU);
138  }
139
140  if (clang_isDeclaration(C.kind)) {
141    Decl *D = cxcursor::getCursorDecl(C);
142    if (!D)
143      return MakeCXType(QualType(), TU);
144
145    if (TypeDecl *TD = dyn_cast<TypeDecl>(D))
146      return MakeCXType(Context.getTypeDeclType(TD), TU);
147    if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(D))
148      return MakeCXType(Context.getObjCInterfaceType(ID), TU);
149    if (ValueDecl *VD = dyn_cast<ValueDecl>(D))
150      return MakeCXType(VD->getType(), TU);
151    if (ObjCPropertyDecl *PD = dyn_cast<ObjCPropertyDecl>(D))
152      return MakeCXType(PD->getType(), TU);
153    if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
154      return MakeCXType(FD->getType(), TU);
155    return MakeCXType(QualType(), TU);
156  }
157
158  if (clang_isReference(C.kind)) {
159    switch (C.kind) {
160    case CXCursor_ObjCSuperClassRef: {
161      QualType T
162        = Context.getObjCInterfaceType(getCursorObjCSuperClassRef(C).first);
163      return MakeCXType(T, TU);
164    }
165
166    case CXCursor_ObjCClassRef: {
167      QualType T = Context.getObjCInterfaceType(getCursorObjCClassRef(C).first);
168      return MakeCXType(T, TU);
169    }
170
171    case CXCursor_TypeRef: {
172      QualType T = Context.getTypeDeclType(getCursorTypeRef(C).first);
173      return MakeCXType(T, TU);
174
175    }
176
177    case CXCursor_CXXBaseSpecifier:
178      return cxtype::MakeCXType(getCursorCXXBaseSpecifier(C)->getType(), TU);
179
180    case CXCursor_MemberRef:
181      return cxtype::MakeCXType(getCursorMemberRef(C).first->getType(), TU);
182
183    case CXCursor_VariableRef:
184      return cxtype::MakeCXType(getCursorVariableRef(C).first->getType(), TU);
185
186    case CXCursor_ObjCProtocolRef:
187    case CXCursor_TemplateRef:
188    case CXCursor_NamespaceRef:
189    case CXCursor_OverloadedDeclRef:
190    default:
191      break;
192    }
193
194    return MakeCXType(QualType(), TU);
195  }
196
197  return MakeCXType(QualType(), TU);
198}
199
200CXType clang_getTypedefDeclUnderlyingType(CXCursor C) {
201  using namespace cxcursor;
202  CXTranslationUnit TU = cxcursor::getCursorTU(C);
203
204  if (clang_isDeclaration(C.kind)) {
205    Decl *D = cxcursor::getCursorDecl(C);
206
207    if (TypedefNameDecl *TD = dyn_cast_or_null<TypedefNameDecl>(D)) {
208      QualType T = TD->getUnderlyingType();
209      return MakeCXType(T, TU);
210    }
211
212    return MakeCXType(QualType(), TU);
213  }
214
215  return MakeCXType(QualType(), TU);
216}
217
218CXType clang_getEnumDeclIntegerType(CXCursor C) {
219  using namespace cxcursor;
220  CXTranslationUnit TU = cxcursor::getCursorTU(C);
221
222  if (clang_isDeclaration(C.kind)) {
223    Decl *D = cxcursor::getCursorDecl(C);
224
225    if (EnumDecl *TD = dyn_cast_or_null<EnumDecl>(D)) {
226      QualType T = TD->getIntegerType();
227      return MakeCXType(T, TU);
228    }
229
230    return MakeCXType(QualType(), TU);
231  }
232
233  return MakeCXType(QualType(), TU);
234}
235
236long long clang_getEnumConstantDeclValue(CXCursor C) {
237  using namespace cxcursor;
238
239  if (clang_isDeclaration(C.kind)) {
240    Decl *D = cxcursor::getCursorDecl(C);
241
242    if (EnumConstantDecl *TD = dyn_cast_or_null<EnumConstantDecl>(D)) {
243      return TD->getInitVal().getSExtValue();
244    }
245
246    return LLONG_MIN;
247  }
248
249  return LLONG_MIN;
250}
251
252unsigned long long clang_getEnumConstantDeclUnsignedValue(CXCursor C) {
253  using namespace cxcursor;
254
255  if (clang_isDeclaration(C.kind)) {
256    Decl *D = cxcursor::getCursorDecl(C);
257
258    if (EnumConstantDecl *TD = dyn_cast_or_null<EnumConstantDecl>(D)) {
259      return TD->getInitVal().getZExtValue();
260    }
261
262    return ULLONG_MAX;
263  }
264
265  return ULLONG_MAX;
266}
267
268CXType clang_getCanonicalType(CXType CT) {
269  if (CT.kind == CXType_Invalid)
270    return CT;
271
272  QualType T = GetQualType(CT);
273  CXTranslationUnit TU = GetTU(CT);
274
275  if (T.isNull())
276    return MakeCXType(QualType(), GetTU(CT));
277
278  ASTUnit *AU = static_cast<ASTUnit*>(TU->TUData);
279  return MakeCXType(AU->getASTContext().getCanonicalType(T), TU);
280}
281
282unsigned clang_isConstQualifiedType(CXType CT) {
283  QualType T = GetQualType(CT);
284  return T.isLocalConstQualified();
285}
286
287unsigned clang_isVolatileQualifiedType(CXType CT) {
288  QualType T = GetQualType(CT);
289  return T.isLocalVolatileQualified();
290}
291
292unsigned clang_isRestrictQualifiedType(CXType CT) {
293  QualType T = GetQualType(CT);
294  return T.isLocalRestrictQualified();
295}
296
297CXType clang_getPointeeType(CXType CT) {
298  QualType T = GetQualType(CT);
299  const Type *TP = T.getTypePtrOrNull();
300
301  if (!TP)
302    return MakeCXType(QualType(), GetTU(CT));
303
304  switch (TP->getTypeClass()) {
305    case Type::Pointer:
306      T = cast<PointerType>(TP)->getPointeeType();
307      break;
308    case Type::BlockPointer:
309      T = cast<BlockPointerType>(TP)->getPointeeType();
310      break;
311    case Type::LValueReference:
312    case Type::RValueReference:
313      T = cast<ReferenceType>(TP)->getPointeeType();
314      break;
315    case Type::ObjCObjectPointer:
316      T = cast<ObjCObjectPointerType>(TP)->getPointeeType();
317      break;
318    default:
319      T = QualType();
320      break;
321  }
322  return MakeCXType(T, GetTU(CT));
323}
324
325CXCursor clang_getTypeDeclaration(CXType CT) {
326  if (CT.kind == CXType_Invalid)
327    return cxcursor::MakeCXCursorInvalid(CXCursor_NoDeclFound);
328
329  QualType T = GetQualType(CT);
330  const Type *TP = T.getTypePtrOrNull();
331
332  if (!TP)
333    return cxcursor::MakeCXCursorInvalid(CXCursor_NoDeclFound);
334
335  Decl *D = 0;
336
337try_again:
338  switch (TP->getTypeClass()) {
339  case Type::Typedef:
340    D = cast<TypedefType>(TP)->getDecl();
341    break;
342  case Type::ObjCObject:
343    D = cast<ObjCObjectType>(TP)->getInterface();
344    break;
345  case Type::ObjCInterface:
346    D = cast<ObjCInterfaceType>(TP)->getDecl();
347    break;
348  case Type::Record:
349  case Type::Enum:
350    D = cast<TagType>(TP)->getDecl();
351    break;
352  case Type::TemplateSpecialization:
353    if (const RecordType *Record = TP->getAs<RecordType>())
354      D = Record->getDecl();
355    else
356      D = cast<TemplateSpecializationType>(TP)->getTemplateName()
357                                                         .getAsTemplateDecl();
358    break;
359
360  case Type::InjectedClassName:
361    D = cast<InjectedClassNameType>(TP)->getDecl();
362    break;
363
364  // FIXME: Template type parameters!
365
366  case Type::Elaborated:
367    TP = cast<ElaboratedType>(TP)->getNamedType().getTypePtrOrNull();
368    goto try_again;
369
370  default:
371    break;
372  }
373
374  if (!D)
375    return cxcursor::MakeCXCursorInvalid(CXCursor_NoDeclFound);
376
377  return cxcursor::MakeCXCursor(D, GetTU(CT));
378}
379
380CXString clang_getTypeKindSpelling(enum CXTypeKind K) {
381  const char *s = 0;
382#define TKIND(X) case CXType_##X: s = ""  #X  ""; break
383  switch (K) {
384    TKIND(Invalid);
385    TKIND(Unexposed);
386    TKIND(Void);
387    TKIND(Bool);
388    TKIND(Char_U);
389    TKIND(UChar);
390    TKIND(Char16);
391    TKIND(Char32);
392    TKIND(UShort);
393    TKIND(UInt);
394    TKIND(ULong);
395    TKIND(ULongLong);
396    TKIND(UInt128);
397    TKIND(Char_S);
398    TKIND(SChar);
399    case CXType_WChar: s = "WChar"; break;
400    TKIND(Short);
401    TKIND(Int);
402    TKIND(Long);
403    TKIND(LongLong);
404    TKIND(Int128);
405    TKIND(Float);
406    TKIND(Double);
407    TKIND(LongDouble);
408    TKIND(NullPtr);
409    TKIND(Overload);
410    TKIND(Dependent);
411    TKIND(ObjCId);
412    TKIND(ObjCClass);
413    TKIND(ObjCSel);
414    TKIND(Complex);
415    TKIND(Pointer);
416    TKIND(BlockPointer);
417    TKIND(LValueReference);
418    TKIND(RValueReference);
419    TKIND(Record);
420    TKIND(Enum);
421    TKIND(Typedef);
422    TKIND(ObjCInterface);
423    TKIND(ObjCObjectPointer);
424    TKIND(FunctionNoProto);
425    TKIND(FunctionProto);
426    TKIND(ConstantArray);
427    TKIND(Vector);
428  }
429#undef TKIND
430  return cxstring::createCXString(s);
431}
432
433unsigned clang_equalTypes(CXType A, CXType B) {
434  return A.data[0] == B.data[0] && A.data[1] == B.data[1];;
435}
436
437unsigned clang_isFunctionTypeVariadic(CXType X) {
438  QualType T = GetQualType(X);
439  if (T.isNull())
440    return 0;
441
442  if (const FunctionProtoType *FD = T->getAs<FunctionProtoType>())
443    return (unsigned)FD->isVariadic();
444
445  if (T->getAs<FunctionNoProtoType>())
446    return 1;
447
448  return 0;
449}
450
451CXCallingConv clang_getFunctionTypeCallingConv(CXType X) {
452  QualType T = GetQualType(X);
453  if (T.isNull())
454    return CXCallingConv_Invalid;
455
456  if (const FunctionType *FD = T->getAs<FunctionType>()) {
457#define TCALLINGCONV(X) case CC_##X: return CXCallingConv_##X
458    switch (FD->getCallConv()) {
459      TCALLINGCONV(Default);
460      TCALLINGCONV(C);
461      TCALLINGCONV(X86StdCall);
462      TCALLINGCONV(X86FastCall);
463      TCALLINGCONV(X86ThisCall);
464      TCALLINGCONV(X86Pascal);
465      TCALLINGCONV(AAPCS);
466      TCALLINGCONV(AAPCS_VFP);
467    }
468#undef TCALLINGCONV
469  }
470
471  return CXCallingConv_Invalid;
472}
473
474int clang_getNumArgTypes(CXType X) {
475  QualType T = GetQualType(X);
476  if (T.isNull())
477    return -1;
478
479  if (const FunctionProtoType *FD = T->getAs<FunctionProtoType>()) {
480    return FD->getNumArgs();
481  }
482
483  if (T->getAs<FunctionNoProtoType>()) {
484    return 0;
485  }
486
487  return -1;
488}
489
490CXType clang_getArgType(CXType X, unsigned i) {
491  QualType T = GetQualType(X);
492  if (T.isNull())
493    return MakeCXType(QualType(), GetTU(X));
494
495  if (const FunctionProtoType *FD = T->getAs<FunctionProtoType>()) {
496    unsigned numArgs = FD->getNumArgs();
497    if (i >= numArgs)
498      return MakeCXType(QualType(), GetTU(X));
499
500    return MakeCXType(FD->getArgType(i), GetTU(X));
501  }
502
503  return MakeCXType(QualType(), GetTU(X));
504}
505
506CXType clang_getResultType(CXType X) {
507  QualType T = GetQualType(X);
508  if (T.isNull())
509    return MakeCXType(QualType(), GetTU(X));
510
511  if (const FunctionType *FD = T->getAs<FunctionType>())
512    return MakeCXType(FD->getResultType(), GetTU(X));
513
514  return MakeCXType(QualType(), GetTU(X));
515}
516
517CXType clang_getCursorResultType(CXCursor C) {
518  if (clang_isDeclaration(C.kind)) {
519    Decl *D = cxcursor::getCursorDecl(C);
520    if (const ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(D))
521      return MakeCXType(MD->getResultType(), cxcursor::getCursorTU(C));
522
523    return clang_getResultType(clang_getCursorType(C));
524  }
525
526  return MakeCXType(QualType(), cxcursor::getCursorTU(C));
527}
528
529unsigned clang_isPODType(CXType X) {
530  QualType T = GetQualType(X);
531  if (T.isNull())
532    return 0;
533
534  CXTranslationUnit TU = GetTU(X);
535  ASTUnit *AU = static_cast<ASTUnit*>(TU->TUData);
536
537  return T.isPODType(AU->getASTContext()) ? 1 : 0;
538}
539
540CXType clang_getElementType(CXType CT) {
541  QualType ET = QualType();
542  QualType T = GetQualType(CT);
543  const Type *TP = T.getTypePtrOrNull();
544
545  if (TP) {
546    switch (TP->getTypeClass()) {
547    case Type::ConstantArray:
548      ET = cast<ConstantArrayType> (TP)->getElementType();
549      break;
550    case Type::Vector:
551      ET = cast<VectorType> (TP)->getElementType();
552      break;
553    case Type::Complex:
554      ET = cast<ComplexType> (TP)->getElementType();
555      break;
556    default:
557      break;
558    }
559  }
560  return MakeCXType(ET, GetTU(CT));
561}
562
563long long clang_getNumElements(CXType CT) {
564  long long result = -1;
565  QualType T = GetQualType(CT);
566  const Type *TP = T.getTypePtrOrNull();
567
568  if (TP) {
569    switch (TP->getTypeClass()) {
570    case Type::ConstantArray:
571      result = cast<ConstantArrayType> (TP)->getSize().getSExtValue();
572      break;
573    case Type::Vector:
574      result = cast<VectorType> (TP)->getNumElements();
575      break;
576    default:
577      break;
578    }
579  }
580  return result;
581}
582
583CXType clang_getArrayElementType(CXType CT) {
584  QualType ET = QualType();
585  QualType T = GetQualType(CT);
586  const Type *TP = T.getTypePtrOrNull();
587
588  if (TP) {
589    switch (TP->getTypeClass()) {
590    case Type::ConstantArray:
591      ET = cast<ConstantArrayType> (TP)->getElementType();
592      break;
593    default:
594      break;
595    }
596  }
597  return MakeCXType(ET, GetTU(CT));
598}
599
600long long clang_getArraySize(CXType CT) {
601  long long result = -1;
602  QualType T = GetQualType(CT);
603  const Type *TP = T.getTypePtrOrNull();
604
605  if (TP) {
606    switch (TP->getTypeClass()) {
607    case Type::ConstantArray:
608      result = cast<ConstantArrayType> (TP)->getSize().getSExtValue();
609      break;
610    default:
611      break;
612    }
613  }
614  return result;
615}
616
617CXString clang_getDeclObjCTypeEncoding(CXCursor C) {
618  if (!clang_isDeclaration(C.kind))
619    return cxstring::createCXString("");
620
621  Decl *D = static_cast<Decl*>(C.data[0]);
622  CXTranslationUnit TU = static_cast<CXTranslationUnit>(C.data[2]);
623  ASTUnit *AU = static_cast<ASTUnit*>(TU->TUData);
624  ASTContext &Ctx = AU->getASTContext();
625  std::string encoding;
626
627  if (ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D))  {
628    if (Ctx.getObjCEncodingForMethodDecl(OMD, encoding))
629      return cxstring::createCXString("?");
630  } else if (ObjCPropertyDecl *OPD = dyn_cast<ObjCPropertyDecl>(D))
631    Ctx.getObjCEncodingForPropertyDecl(OPD, NULL, encoding);
632  else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
633    Ctx.getObjCEncodingForFunctionDecl(FD, encoding);
634  else {
635    QualType Ty;
636    if (TypeDecl *TD = dyn_cast<TypeDecl>(D))
637      Ty = Ctx.getTypeDeclType(TD);
638    if (ValueDecl *VD = dyn_cast<ValueDecl>(D))
639      Ty = VD->getType();
640    else return cxstring::createCXString("?");
641    Ctx.getObjCEncodingForType(Ty, encoding);
642  }
643
644  return cxstring::createCXString(encoding);
645}
646
647} // end: extern "C"
648