1 files changed, 89 insertions, 0 deletions
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h b/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
new file mode 100644
index 0000000000000..848db2990ded7
--- /dev/null
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
@@ -0,0 +1,89 @@
+//===-- DWARFFormValue.h ----------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SymbolFileDWARF_DWARFFormValue_h_
+#define SymbolFileDWARF_DWARFFormValue_h_
+
+#include "DWARFDataExtractor.h"
+#include <stddef.h>
+#include "llvm/ADT/Optional.h"
+
+class DWARFUnit;
+class SymbolFileDWARF;
+class DWARFDIE;
+
+class DWARFFormValue {
+public:
+  typedef struct ValueTypeTag {
+    ValueTypeTag() : value(), data(nullptr) { value.uval = 0; }
+
+    union {
+      uint64_t uval;
+      int64_t sval;
+      const char *cstr;
+    } value;
+    const uint8_t *data;
+  } ValueType;
+
+  enum {
+    eValueTypeInvalid = 0,
+    eValueTypeUnsigned,
+    eValueTypeSigned,
+    eValueTypeCStr,
+    eValueTypeBlock
+  };
+
+  DWARFFormValue() = default;
+  DWARFFormValue(const DWARFUnit *unit) : m_unit(unit) {}
+  DWARFFormValue(const DWARFUnit *unit, dw_form_t form)
+      : m_unit(unit), m_form(form) {}
+  void SetUnit(const DWARFUnit *unit) { m_unit = unit; }
+  dw_form_t Form() const { return m_form; }
+  dw_form_t& FormRef() { return m_form; }
+  void SetForm(dw_form_t form) { m_form = form; }
+  const ValueType &Value() const { return m_value; }
+  ValueType &ValueRef() { return m_value; }
+  void SetValue(const ValueType &val) { m_value = val; }
+
+  void Dump(lldb_private::Stream &s) const;
+  bool ExtractValue(const lldb_private::DWARFDataExtractor &data,
+                    lldb::offset_t *offset_ptr);
+  const uint8_t *BlockData() const;
+  static llvm::Optional<uint8_t> GetFixedSize(dw_form_t form,
+                                              const DWARFUnit *u);
+  llvm::Optional<uint8_t> GetFixedSize() const;
+  DWARFDIE Reference() const;
+  uint64_t Reference(dw_offset_t offset) const;
+  bool Boolean() const { return m_value.value.uval != 0; }
+  uint64_t Unsigned() const { return m_value.value.uval; }
+  void SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
+  int64_t Signed() const { return m_value.value.sval; }
+  void SetSigned(int64_t sval) { m_value.value.sval = sval; }
+  const char *AsCString() const;
+  dw_addr_t Address() const;
+  bool IsValid() const { return m_form != 0; }
+  bool SkipValue(const lldb_private::DWARFDataExtractor &debug_info_data,
+                 lldb::offset_t *offset_ptr) const;
+  static bool SkipValue(const dw_form_t form,
+                        const lldb_private::DWARFDataExtractor &debug_info_data,
+                        lldb::offset_t *offset_ptr, const DWARFUnit *unit);
+  static bool IsBlockForm(const dw_form_t form);
+  static bool IsDataForm(const dw_form_t form);
+  static int Compare(const DWARFFormValue &a, const DWARFFormValue &b);
+  void Clear();
+  static bool FormIsSupported(dw_form_t form);
+
+protected:
+  // Compile unit where m_value was located.
+  // It may be different from compile unit where m_value refers to.
+  const DWARFUnit *m_unit = nullptr; // Unit for this form
+  dw_form_t m_form = 0;              // Form for this value
+  ValueType m_value;            // Contains all data for the form
+};
+
+#endif // SymbolFileDWARF_DWARFFormValue_h_