ASTCommon.cpp revision 212795 
1//===--- ASTCommon.cpp - Common stuff for ASTReader/ASTWriter----*- C++ -*-===//
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 defines common functions that both ASTReader and ASTWriter use.
11//
12//===----------------------------------------------------------------------===//
13
14#include "ASTCommon.h"
15#include "clang/Basic/IdentifierTable.h"
16#include "llvm/ADT/StringExtras.h"
17
18using namespace clang;
19
20serialization::TypeIdx
21serialization::TypeIdxFromBuiltin(const BuiltinType *BT) {
22  unsigned ID = 0;
23  switch (BT->getKind()) {
24  case BuiltinType::Void:       ID = PREDEF_TYPE_VOID_ID;       break;
25  case BuiltinType::Bool:       ID = PREDEF_TYPE_BOOL_ID;       break;
26  case BuiltinType::Char_U:     ID = PREDEF_TYPE_CHAR_U_ID;     break;
27  case BuiltinType::UChar:      ID = PREDEF_TYPE_UCHAR_ID;      break;
28  case BuiltinType::UShort:     ID = PREDEF_TYPE_USHORT_ID;     break;
29  case BuiltinType::UInt:       ID = PREDEF_TYPE_UINT_ID;       break;
30  case BuiltinType::ULong:      ID = PREDEF_TYPE_ULONG_ID;      break;
31  case BuiltinType::ULongLong:  ID = PREDEF_TYPE_ULONGLONG_ID;  break;
32  case BuiltinType::UInt128:    ID = PREDEF_TYPE_UINT128_ID;    break;
33  case BuiltinType::Char_S:     ID = PREDEF_TYPE_CHAR_S_ID;     break;
34  case BuiltinType::SChar:      ID = PREDEF_TYPE_SCHAR_ID;      break;
35  case BuiltinType::WChar:      ID = PREDEF_TYPE_WCHAR_ID;      break;
36  case BuiltinType::Short:      ID = PREDEF_TYPE_SHORT_ID;      break;
37  case BuiltinType::Int:        ID = PREDEF_TYPE_INT_ID;        break;
38  case BuiltinType::Long:       ID = PREDEF_TYPE_LONG_ID;       break;
39  case BuiltinType::LongLong:   ID = PREDEF_TYPE_LONGLONG_ID;   break;
40  case BuiltinType::Int128:     ID = PREDEF_TYPE_INT128_ID;     break;
41  case BuiltinType::Float:      ID = PREDEF_TYPE_FLOAT_ID;      break;
42  case BuiltinType::Double:     ID = PREDEF_TYPE_DOUBLE_ID;     break;
43  case BuiltinType::LongDouble: ID = PREDEF_TYPE_LONGDOUBLE_ID; break;
44  case BuiltinType::NullPtr:    ID = PREDEF_TYPE_NULLPTR_ID;    break;
45  case BuiltinType::Char16:     ID = PREDEF_TYPE_CHAR16_ID;     break;
46  case BuiltinType::Char32:     ID = PREDEF_TYPE_CHAR32_ID;     break;
47  case BuiltinType::Overload:   ID = PREDEF_TYPE_OVERLOAD_ID;   break;
48  case BuiltinType::Dependent:  ID = PREDEF_TYPE_DEPENDENT_ID;  break;
49  case BuiltinType::ObjCId:     ID = PREDEF_TYPE_OBJC_ID;       break;
50  case BuiltinType::ObjCClass:  ID = PREDEF_TYPE_OBJC_CLASS;    break;
51  case BuiltinType::ObjCSel:    ID = PREDEF_TYPE_OBJC_SEL;      break;
52  case BuiltinType::UndeducedAuto:
53    assert(0 && "Should not see undeduced auto here");
54    break;
55  }
56
57  return TypeIdx(ID);
58}
59
60unsigned serialization::ComputeHash(Selector Sel) {
61  unsigned N = Sel.getNumArgs();
62  if (N == 0)
63    ++N;
64  unsigned R = 5381;
65  for (unsigned I = 0; I != N; ++I)
66    if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
67      R = llvm::HashString(II->getName(), R);
68  return R;
69}
70