#ifndef WASMReader_h
#define WASMReader_h
#if ENABLE(WEBASSEMBLY)
#include "WASMConstants.h"
#include "WASMFormat.h"
#include <wtf/Vector.h>
namespace JSC {
class WASMReader {
public:
WASMReader(const Vector<uint8_t>& buffer)
: m_buffer(buffer)
, m_cursor(buffer.data())
{
}
unsigned offset() const { return m_cursor - m_buffer.data(); }
void setOffset(unsigned offset) { m_cursor = m_buffer.data() + offset; }
bool readUInt32(uint32_t& result);
bool readFloat(float& result);
bool readDouble(double& result);
bool readCompactInt32(uint32_t& result);
bool readCompactUInt32(uint32_t& result);
bool readString(String& result);
bool readType(WASMType& result);
bool readExpressionType(WASMExpressionType& result);
bool readExportFormat(WASMExportFormat& result);
bool readOpStatement(bool& hasImmediate, WASMOpStatement&, WASMOpStatementWithImmediate&, uint8_t& immediate);
bool readOpExpressionI32(bool& hasImmediate, WASMOpExpressionI32&, WASMOpExpressionI32WithImmediate&, uint8_t& immediate);
bool readOpExpressionF32(bool& hasImmediate, WASMOpExpressionF32&, WASMOpExpressionF32WithImmediate&, uint8_t& immediate);
bool readOpExpressionF64(bool& hasImmediate, WASMOpExpressionF64&, WASMOpExpressionF64WithImmediate&, uint8_t& immediate);
bool readOpExpressionVoid(WASMOpExpressionVoid&);
bool readVariableTypes(bool& hasImmediate, WASMVariableTypes&, WASMVariableTypesWithImmediate&, uint8_t& immediate);
bool readSwitchCase(WASMSwitchCase& result);
private:
static const uint32_t firstSevenBitsMask = 0x7f;
template <class T> bool readByte(T& result, uint8_t numberOfValues);
template <class T, class TWithImmediate> bool readOp(bool& hasImmediate, T&, TWithImmediate&, uint8_t& immediate, uint8_t numberOfValues, uint8_t numberOfValuesWithImmediate);
const Vector<uint8_t>& m_buffer;
const uint8_t* m_cursor;
};
}
#endif // ENABLE(WEBASSEMBLY)
#endif // WASMReader_h