lib/Serialization/ASTCommon.cpp

   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/Serialization/ASTDeserializationListener.h"
  16 #include "clang/Basic/IdentifierTable.h"
  17 #include "llvm/ADT/StringExtras.h"
  18
  19 using namespace clang;
  20
  21 // Give ASTDeserializationListener's VTable a home.
  22 ASTDeserializationListener::~ASTDeserializationListener() { }
  23
  24 serialization::TypeIdx
  25 serialization::TypeIdxFromBuiltin(const BuiltinType *BT) {
  26   unsigned ID = 0;
  27   switch (BT->getKind()) {
  28   case BuiltinType::Void:       ID = PREDEF_TYPE_VOID_ID;       break;
  29   case BuiltinType::Bool:       ID = PREDEF_TYPE_BOOL_ID;       break;
  30   case BuiltinType::Char_U:     ID = PREDEF_TYPE_CHAR_U_ID;     break;
  31   case BuiltinType::UChar:      ID = PREDEF_TYPE_UCHAR_ID;      break;
  32   case BuiltinType::UShort:     ID = PREDEF_TYPE_USHORT_ID;     break;
  33   case BuiltinType::UInt:       ID = PREDEF_TYPE_UINT_ID;       break;
  34   case BuiltinType::ULong:      ID = PREDEF_TYPE_ULONG_ID;      break;
  35   case BuiltinType::ULongLong:  ID = PREDEF_TYPE_ULONGLONG_ID;  break;
  36   case BuiltinType::UInt128:    ID = PREDEF_TYPE_UINT128_ID;    break;
  37   case BuiltinType::Char_S:     ID = PREDEF_TYPE_CHAR_S_ID;     break;
  38   case BuiltinType::SChar:      ID = PREDEF_TYPE_SCHAR_ID;      break;
  39   case BuiltinType::WChar_S:
  40   case BuiltinType::WChar_U:    ID = PREDEF_TYPE_WCHAR_ID;      break;
  41   case BuiltinType::Short:      ID = PREDEF_TYPE_SHORT_ID;      break;
  42   case BuiltinType::Int:        ID = PREDEF_TYPE_INT_ID;        break;
  43   case BuiltinType::Long:       ID = PREDEF_TYPE_LONG_ID;       break;
  44   case BuiltinType::LongLong:   ID = PREDEF_TYPE_LONGLONG_ID;   break;
  45   case BuiltinType::Int128:     ID = PREDEF_TYPE_INT128_ID;     break;
  46   case BuiltinType::Float:      ID = PREDEF_TYPE_FLOAT_ID;      break;
  47   case BuiltinType::Double:     ID = PREDEF_TYPE_DOUBLE_ID;     break;
  48   case BuiltinType::LongDouble: ID = PREDEF_TYPE_LONGDOUBLE_ID; break;
  49   case BuiltinType::NullPtr:    ID = PREDEF_TYPE_NULLPTR_ID;    break;
  50   case BuiltinType::Char16:     ID = PREDEF_TYPE_CHAR16_ID;     break;
  51   case BuiltinType::Char32:     ID = PREDEF_TYPE_CHAR32_ID;     break;
  52   case BuiltinType::Overload:   ID = PREDEF_TYPE_OVERLOAD_ID;   break;
  53   case BuiltinType::Dependent:  ID = PREDEF_TYPE_DEPENDENT_ID;  break;
  54   case BuiltinType::ObjCId:     ID = PREDEF_TYPE_OBJC_ID;       break;
  55   case BuiltinType::ObjCClass:  ID = PREDEF_TYPE_OBJC_CLASS;    break;
  56   case BuiltinType::ObjCSel:    ID = PREDEF_TYPE_OBJC_SEL;      break;
  57   case BuiltinType::UndeducedAuto:
  58     assert(0 && "Should not see undeduced auto here");
  59     break;
  60   }
  61
  62   return TypeIdx(ID);
  63 }
  64
  65 unsigned serialization::ComputeHash(Selector Sel) {
  66   unsigned N = Sel.getNumArgs();
  67   if (N == 0)
  68     ++N;
  69   unsigned R = 5381;
  70   for (unsigned I = 0; I != N; ++I)
  71     if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I))
  72       R = llvm::HashString(II->getName(), R);
  73   return R;
  74 }