1 files changed, 102 insertions, 0 deletions
diff --git a/llvm/lib/DebugInfo/GSYM/Range.cpp b/llvm/lib/DebugInfo/GSYM/Range.cpp
new file mode 100644
index 000000000000..19ab700fdd57
--- /dev/null
+++ b/llvm/lib/DebugInfo/GSYM/Range.cpp
@@ -0,0 +1,102 @@
+//===- Range.cpp ------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/GSYM/Range.h"
+#include "llvm/DebugInfo/GSYM/FileWriter.h"
+#include "llvm/Support/DataExtractor.h"
+#include <algorithm>
+#include <inttypes.h>
+
+using namespace llvm;
+using namespace gsym;
+
+
+void AddressRanges::insert(AddressRange Range) {
+  if (Range.size() == 0)
+    return;
+
+  auto It = llvm::upper_bound(Ranges, Range);
+  auto It2 = It;
+  while (It2 != Ranges.end() && It2->Start < Range.End)
+    ++It2;
+  if (It != It2) {
+    Range.End = std::max(Range.End, It2[-1].End);
+    It = Ranges.erase(It, It2);
+  }
+  if (It != Ranges.begin() && Range.Start < It[-1].End)
+    It[-1].End = std::max(It[-1].End, Range.End);
+  else
+    Ranges.insert(It, Range);
+}
+
+bool AddressRanges::contains(uint64_t Addr) const {
+  auto It = std::partition_point(
+      Ranges.begin(), Ranges.end(),
+      [=](const AddressRange &R) { return R.Start <= Addr; });
+  return It != Ranges.begin() && Addr < It[-1].End;
+}
+
+bool AddressRanges::contains(AddressRange Range) const {
+  if (Range.size() == 0)
+    return false;
+  auto It = std::partition_point(
+      Ranges.begin(), Ranges.end(),
+      [=](const AddressRange &R) { return R.Start <= Range.Start; });
+  if (It == Ranges.begin())
+    return false;
+  return Range.End <= It[-1].End;
+}
+
+raw_ostream &llvm::gsym::operator<<(raw_ostream &OS, const AddressRange &R) {
+  return OS << '[' << HEX64(R.Start) << " - " << HEX64(R.End) << ")";
+}
+
+raw_ostream &llvm::gsym::operator<<(raw_ostream &OS, const AddressRanges &AR) {
+  size_t Size = AR.size();
+  for (size_t I = 0; I < Size; ++I) {
+    if (I)
+      OS << ' ';
+    OS << AR[I];
+  }
+  return OS;
+}
+
+void AddressRange::encode(FileWriter &O, uint64_t BaseAddr) const {
+  assert(Start >= BaseAddr);
+  O.writeULEB(Start - BaseAddr);
+  O.writeULEB(size());
+}
+
+void AddressRange::decode(DataExtractor &Data, uint64_t BaseAddr,
+                          uint64_t &Offset) {
+  const uint64_t AddrOffset = Data.getULEB128(&Offset);
+  const uint64_t Size = Data.getULEB128(&Offset);
+  const uint64_t StartAddr = BaseAddr + AddrOffset;
+  Start = StartAddr;
+  End = StartAddr + Size;
+}
+
+void AddressRanges::encode(FileWriter &O, uint64_t BaseAddr) const {
+  O.writeULEB(Ranges.size());
+  if (Ranges.empty())
+    return;
+  for (auto Range : Ranges)
+    Range.encode(O, BaseAddr);
+}
+
+void AddressRanges::decode(DataExtractor &Data, uint64_t BaseAddr,
+                           uint64_t &Offset) {
+  clear();
+  uint64_t NumRanges = Data.getULEB128(&Offset);
+  if (NumRanges == 0)
+    return;
+  Ranges.resize(NumRanges);
+  for (auto &Range : Ranges)
+    Range.decode(Data, BaseAddr, Offset);
+}