intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 82 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/lib/DebugInfo/CodeView/CVSymbolVisitor.cpp b/contrib/libs/llvm12/lib/DebugInfo/CodeView/CVSymbolVisitor.cpp
new file mode 100644
index 00000000000..48b9b0496ff
--- /dev/null
+++ b/contrib/libs/llvm12/lib/DebugInfo/CodeView/CVSymbolVisitor.cpp
@@ -0,0 +1,82 @@
+//===- CVSymbolVisitor.cpp --------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/CVSymbolVisitor.h"
+
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+CVSymbolVisitor::CVSymbolVisitor(SymbolVisitorCallbacks &Callbacks)
+    : Callbacks(Callbacks) {}
+
+template <typename T>
+static Error visitKnownRecord(CVSymbol &Record,
+                              SymbolVisitorCallbacks &Callbacks) {
+  SymbolRecordKind RK = static_cast<SymbolRecordKind>(Record.kind());
+  T KnownRecord(RK);
+  if (auto EC = Callbacks.visitKnownRecord(Record, KnownRecord))
+    return EC;
+  return Error::success();
+}
+
+static Error finishVisitation(CVSymbol &Record,
+                              SymbolVisitorCallbacks &Callbacks) {
+  switch (Record.kind()) {
+  default:
+    if (auto EC = Callbacks.visitUnknownSymbol(Record))
+      return EC;
+    break;
+#define SYMBOL_RECORD(EnumName, EnumVal, Name)                                 \
+  case EnumName: {                                                             \
+    if (auto EC = visitKnownRecord<Name>(Record, Callbacks))                   \
+      return EC;                                                               \
+    break;                                                                     \
+  }
+#define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)                \
+  SYMBOL_RECORD(EnumVal, EnumVal, AliasName)
+#include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
+  }
+
+  if (auto EC = Callbacks.visitSymbolEnd(Record))
+    return EC;
+
+  return Error::success();
+}
+
+Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record) {
+  if (auto EC = Callbacks.visitSymbolBegin(Record))
+    return EC;
+  return finishVisitation(Record, Callbacks);
+}
+
+Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record, uint32_t Offset) {
+  if (auto EC = Callbacks.visitSymbolBegin(Record, Offset))
+    return EC;
+  return finishVisitation(Record, Callbacks);
+}
+
+Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols) {
+  for (auto I : Symbols) {
+    if (auto EC = visitSymbolRecord(I))
+      return EC;
+  }
+  return Error::success();
+}
+
+Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols,
+                                         uint32_t InitialOffset) {
+  for (auto I : Symbols) {
+    if (auto EC = visitSymbolRecord(I, InitialOffset + Symbols.skew()))
+      return EC;
+    InitialOffset += I.length();
+  }
+  return Error::success();
+}