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#pragma once
#include <array>
#include <string_view>
#include "compressionctx.h"
namespace embed
{
template <std::size_t N>
class Resources
{
public:
constexpr explicit Resources(
const std::array<const char *, N> &entries,
const std::array<std::span<const uint8_t>, N> &values)
: m_entries(entries)
, m_values(values)
{
}
[[nodiscard]] constexpr int id(const std::string_view &path) const
{
for(std::size_t i = 0; i < m_entries.size(); ++i) {
if(m_entries.at(i) == path)
return i;
}
return -1;
}
[[nodiscard]] constexpr std::span<const uint8_t> value(const int id_) const
{
if(id_ == -1)
return {};
else
return m_values.at(id_);
}
[[nodiscard]] constexpr std::span<const uint8_t> value(const std::string_view &path) const
{
return value(id(path));
}
[[deprecated("With no compression, this function returns a copy; use ::value instead")]]
[[nodiscard]] std::vector<uint8_t> decompress(const int id_) const
{
const auto v = value(id_);
return { v.begin(), v.end() };
}
[[deprecated("With no compression, this function returns a copy; use ::value instead")]]
[[nodiscard]] std::vector<uint8_t> decompress(const std::string_view &path) const
{
const auto v = value(path);
return { v.begin(), v.end() };
}
protected:
const std::array<const char *, N> m_entries;
const std::array<std::span<const uint8_t>, N> m_values;
};
template <std::size_t N>
class CompressedResources final : public Resources<N>
{
public:
explicit CompressedResources(
const std::array<const char *, N> &entries,
const std::array<std::span<const uint8_t>, N> &values,
const Compression algo,
const std::span<const uint8_t> &dictionary = {})
: Resources<N>(entries, values)
, m_compression(make_compression_ctx(algo, dictionary))
{
}
~CompressedResources() = default;
[[nodiscard]] std::vector<uint8_t> decompress(const int id_) const
{
return m_compression->decompress(Resources<N>::value(id_));
}
[[nodiscard]] std::vector<uint8_t> decompress(const std::string_view &path) const
{
return m_compression->decompress(Resources<N>::value(path));
}
protected:
const std::unique_ptr<CompressionCtx> m_compression;
};
} // namespace embed
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