lib/DebugInfo/CodeView/TypeRecordBuilder.cpp

   1 //===-- TypeRecordBuilder.cpp ---------------------------------------------===//
   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 #include "llvm/DebugInfo/CodeView/TypeRecordBuilder.h"
  11
  12 using namespace llvm;
  13 using namespace codeview;
  14
  15 TypeRecordBuilder::TypeRecordBuilder(TypeRecordKind Kind) : Stream(Buffer),
  16   Writer(Stream) {
  17   writeTypeRecordKind(Kind);
  18 }
  19
  20 StringRef TypeRecordBuilder::str() {
  21   return StringRef(Buffer.data(), Buffer.size());
  22 }
  23
  24 void TypeRecordBuilder::writeUInt8(uint8_t Value) {
  25   Writer.write(Value);
  26 }
  27
  28 void TypeRecordBuilder::writeInt16(int16_t Value) {
  29   Writer.write(Value);
  30 }
  31
  32 void TypeRecordBuilder::writeUInt16(uint16_t Value) {
  33   Writer.write(Value);
  34 }
  35
  36 void TypeRecordBuilder::writeInt32(int32_t Value) {
  37   Writer.write(Value);
  38 }
  39
  40 void TypeRecordBuilder::writeUInt32(uint32_t Value) {
  41   Writer.write(Value);
  42 }
  43
  44 void TypeRecordBuilder::writeInt64(int64_t Value) {
  45   Writer.write(Value);
  46 }
  47
  48 void TypeRecordBuilder::writeUInt64(uint64_t Value) {
  49   Writer.write(Value);
  50 }
  51
  52 void TypeRecordBuilder::writeEncodedInteger(int64_t Value) {
  53   if (Value >= 0) {
  54     writeEncodedUnsignedInteger(static_cast<uint64_t>(Value));
  55   } else {
  56     writeEncodedSignedInteger(Value);
  57   }
  58 }
  59
  60 void TypeRecordBuilder::writeEncodedSignedInteger(int64_t Value) {
  61   if (Value >= std::numeric_limits<int8_t>::min() &&
  62       Value <= std::numeric_limits<int8_t>::max()) {
  63     writeUInt16(static_cast<uint16_t>(TypeRecordKind::SByte));
  64     writeInt16(static_cast<int8_t>(Value));
  65   } else if (Value >= std::numeric_limits<int16_t>::min() &&
  66              Value <= std::numeric_limits<int16_t>::max()) {
  67     writeUInt16(static_cast<uint16_t>(TypeRecordKind::Int16));
  68     writeInt16(static_cast<int16_t>(Value));
  69   } else if (Value >= std::numeric_limits<int32_t>::min() &&
  70              Value <= std::numeric_limits<int32_t>::max()) {
  71     writeUInt16(static_cast<uint32_t>(TypeRecordKind::Int32));
  72     writeInt32(static_cast<int32_t>(Value));
  73   } else {
  74     writeUInt16(static_cast<uint16_t>(TypeRecordKind::Int64));
  75     writeInt64(Value);
  76   }
  77 }
  78
  79 void TypeRecordBuilder::writeEncodedUnsignedInteger(uint64_t Value) {
  80   if (Value < static_cast<uint16_t>(TypeRecordKind::SByte)) {
  81     writeUInt16(static_cast<uint16_t>(Value));
  82   } else if (Value <= std::numeric_limits<uint16_t>::max()) {
  83     writeUInt16(static_cast<uint16_t>(TypeRecordKind::UInt16));
  84     writeUInt16(static_cast<uint16_t>(Value));
  85   } else if (Value <= std::numeric_limits<uint32_t>::max()) {
  86     writeUInt16(static_cast<uint16_t>(TypeRecordKind::UInt32));
  87     writeUInt32(static_cast<uint32_t>(Value));
  88   } else {
  89     writeUInt16(static_cast<uint16_t>(TypeRecordKind::UInt64));
  90     writeUInt64(Value);
  91   }
  92 }
  93
  94 void TypeRecordBuilder::writeNullTerminatedString(const char *Value) {
  95   assert(Value != nullptr);
  96
  97   size_t Length = strlen(Value);
  98   Stream.write(Value, Length);
  99   writeUInt8(0);
 100 }
 101
 102 void TypeRecordBuilder::writeNullTerminatedString(StringRef Value) {
 103   Stream.write(Value.data(), Value.size());
 104   writeUInt8(0);
 105 }
 106
 107 void TypeRecordBuilder::writeTypeIndex(TypeIndex TypeInd) {
 108   writeUInt32(TypeInd.getIndex());
 109 }
 110
 111 void TypeRecordBuilder::writeTypeRecordKind(TypeRecordKind Kind) {
 112   writeUInt16(static_cast<uint16_t>(Kind));
 113 }