Add initial COFF support (coff2bin, readcoff)

1 files changed, 45 insertions, 0 deletions

diff --git a/src/coff_image.h b/src/coff_image.h
new file mode 100644
index 0000000..83b10dd
--- /dev/null
+++ b/src/coff_image.h
@@ -0,0 +1,45 @@
+#pragma once
+
+/* SPDX-License-Identifier: Unlicense
+ */
+
+#include "coff.h"
+
+#include "data_buffer.h"
+
+namespace COFF {
+
+class Image {
+    const DataBuffer _data;
+    char *const _error;
+    const COFF::FileHeader _file_header;
+    bool _has_optional_header;
+    const COFF::OptionalHeader _optional_header;
+public:
+    explicit Image(DataBuffer&&);
+    ~Image();
+    constexpr bool IsValid() const { return _error == nullptr; }
+    constexpr const DataBuffer &Data() const { return _data; };
+    constexpr const char *Error() const { return _error; }
+    constexpr const COFF::FileHeader &FileHeader() const { return _file_header; }
+    constexpr bool HasOptionalHeader() const { return _has_optional_header; }
+    constexpr const COFF::OptionalHeader &OptionalHeader() const { return _optional_header; }
+    constexpr const COFF::SectionHeader GetSectionHeader(unsigned index) const
+    {
+        if (index > _file_header.nsections) {
+            return SectionHeader{};
+        }
+        const size_t offset = COFF::kFileHeaderSize + _file_header.optional_header_nbytes +
+            COFF::kSectionHeaderSize * index;
+        if (offset + kSectionHeaderSize > _data.buffer_size) {
+            return SectionHeader{};
+        }
+        return SectionHeader::FromBytes(_data.buffer + offset);
+    }
+    constexpr DataView GetSectionDataView(const COFF::SectionHeader &header) const
+    {
+        return DataView{_data.buffer + header.section_offset, header.size};
+    }
+};
+
+}