1 files changed, 47 insertions, 0 deletions
diff --git a/thirdparty/raw_pdb/src/PDB_ImageSectionStream.cpp b/thirdparty/raw_pdb/src/PDB_ImageSectionStream.cpp
new file mode 100644
index 000000000..3d495ad0b
--- /dev/null
+++ b/thirdparty/raw_pdb/src/PDB_ImageSectionStream.cpp
@@ -0,0 +1,47 @@
+// Copyright 2011-2022, Molecular Matters GmbH <[email protected]>
+// See LICENSE.txt for licensing details (2-clause BSD License: https://opensource.org/licenses/BSD-2-Clause)
+
+#include "PDB_PCH.h"
+#include "PDB_ImageSectionStream.h"
+#include "PDB_RawFile.h"
+
+
+// ------------------------------------------------------------------------------------------------
+// ------------------------------------------------------------------------------------------------
+PDB::ImageSectionStream::ImageSectionStream(void) PDB_NO_EXCEPT
+	: m_stream()
+	, m_headers(nullptr)
+	, m_count(0u)
+{
+}
+
+
+// ------------------------------------------------------------------------------------------------
+// ------------------------------------------------------------------------------------------------
+PDB::ImageSectionStream::ImageSectionStream(const RawFile& file, uint16_t streamIndex) PDB_NO_EXCEPT
+	: m_stream(file.CreateMSFStream<CoalescedMSFStream>(streamIndex))
+	, m_headers(m_stream.GetDataAtOffset<IMAGE_SECTION_HEADER>(0u))
+	, m_count(m_stream.GetSize() / sizeof(IMAGE_SECTION_HEADER))
+{
+}
+
+
+// ------------------------------------------------------------------------------------------------
+// ------------------------------------------------------------------------------------------------
+PDB_NO_DISCARD uint32_t PDB::ImageSectionStream::ConvertSectionOffsetToRVA(uint16_t oneBasedSectionIndex, uint32_t offsetInSection) const PDB_NO_EXCEPT
+{
+	if (oneBasedSectionIndex == 0u)
+	{
+		// should never happen, but prevent underflow
+		return 0u;
+	}
+	else if (oneBasedSectionIndex > m_count)
+	{
+		// this symbol is "contained" in a section that is neither part of the PDB, nor the EXE.
+		// it is a special compiler-generated or linker-generated symbol such as CFG symbols (e.g. __guard_fids_count, __guard_flags).
+		// we can safely ignore those symbols.
+		return 0u;
+	}
+
+	return m_headers[oneBasedSectionIndex - 1u].VirtualAddress + offsetInSection;
+}