// SPDX-License-Identifier: Apache-2.0

// SPDX-FileCopyrightText: Copyright The WasmEdge Authors

#include "loader/serialize.h"

namespace WasmEdge {

namespace Loader {

// Serialize import description. See "include/loader/serialize.h".

void Serializer::serializeDesc(const AST::ImportDesc &Desc,

                               std::vector<uint8_t> &OutVec) const noexcept {

  // Import description: modname:vec(byte) + extname:vec(byte) + importdesc

  // Module name: vec(byte).

  serializeU32(static_cast<uint32_t>(Desc.getModuleName().size()), OutVec);

  OutVec.insert(OutVec.end(), Desc.getModuleName().begin(),

                Desc.getModuleName().end());

  // External name: vec(byte).

  serializeU32(static_cast<uint32_t>(Desc.getExternalName().size()), OutVec);

  OutVec.insert(OutVec.end(), Desc.getExternalName().begin(),

                Desc.getExternalName().end());

  // Import Desc: extern_type:byte + content:idx|tabletype|memorytype|globaltype

  OutVec.push_back(static_cast<uint8_t>(Desc.getExternalType()));

  switch (Desc.getExternalType()) {

  case ExternalType::Function:

    serializeU32(Desc.getExternalFuncTypeIdx(), OutVec);

    return;

  case ExternalType::Table:

    return serializeType(Desc.getExternalTableType(), OutVec);

  case ExternalType::Memory:

    return serializeType(Desc.getExternalMemoryType(), OutVec);

  case ExternalType::Global:

    return serializeType(Desc.getExternalGlobalType(), OutVec);

  case ExternalType::Tag:

    return serializeType(Desc.getExternalTagType(), OutVec);

  default:

    assumingUnreachable();

  }

}

// Serialize export description. See "include/loader/serialize.h".

void Serializer::serializeDesc(const AST::ExportDesc &Desc,

                               std::vector<uint8_t> &OutVec) const noexcept {

  // Export description: extname:vec(byte) + exportdesc

  // External name: vec(byte).

  serializeU32(static_cast<uint32_t>(Desc.getExternalName().size()), OutVec);

  OutVec.insert(OutVec.end(), Desc.getExternalName().begin(),

                Desc.getExternalName().end());

  // Export Desc: extern_type:byte + idx:u32.

  OutVec.push_back(static_cast<uint8_t>(Desc.getExternalType()));

  serializeU32(Desc.getExternalIndex(), OutVec);

}

} // namespace Loader

} // namespace WasmEdge