// Copyright (c) 2015-2016 The Khronos Group Inc.
//
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//
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// MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS
// KHRONOS STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS
// SPECIFICATIONS AND HEADER INFORMATION ARE LOCATED AT
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//
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#ifndef LIBSPIRV_SPIRV_DEFINITION_H_
#define LIBSPIRV_SPIRV_DEFINITION_H_

#include <cstdint>

#include "spirv-tools/libspirv.h"

// A bit mask representing a set of capabilities.
// Currently there are 57 distinct capabilities, so 64 bits
// should be enough.
typedef uint64_t spv_capability_mask_t;

// Transforms spv::Capability into a mask for use in bitfields.  Should really
// be a constexpr inline function, but some important versions of MSVC don't
// support that yet.  Different from SPV_BIT, which doesn't guarantee 64-bit
// values.
#define SPV_CAPABILITY_AS_MASK(capability) \
  (spv_capability_mask_t(1) << (capability))

// Min/max capability IDs.
enum {
  kCapabilitiesMinValue = SpvCapabilityMatrix,
  kCapabilitiesMaxValue = SpvCapabilityMultiViewport
};

// Applies f to every capability present in a mask.
namespace libspirv {
template <typename Functor>
inline void ForEach(spv_capability_mask_t capabilities, Functor f) {
  for (int cap = kCapabilitiesMinValue; cap <= kCapabilitiesMaxValue; ++cap)
    if (spvIsInBitfield(SPV_CAPABILITY_AS_MASK(cap), capabilities))
      f(static_cast<SpvCapability>(cap));
}
}  // end namespace libspirv

typedef struct spv_header_t {
  uint32_t magic;
  uint32_t version;
  uint32_t generator;
  uint32_t bound;
  uint32_t schema;               // NOTE: Reserved
  const uint32_t* instructions;  // NOTE: Unfixed pointer to instruciton stream
} spv_header_t;

#endif  // LIBSPIRV_SPIRV_DEFINITION_H_