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Diffstat (limited to 'src/openvic-dataloader/File.hpp')
| -rw-r--r-- | src/openvic-dataloader/File.hpp | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/openvic-dataloader/File.hpp b/src/openvic-dataloader/File.hpp new file mode 100644 index 0000000..90fcb11 --- /dev/null +++ b/src/openvic-dataloader/File.hpp @@ -0,0 +1,139 @@ +#pragma once + +#include <cassert> +#include <concepts> // IWYU pragma: keep +#include <type_traits> +#include <variant> + +#include <openvic-dataloader/NodeLocation.hpp> +#include <openvic-dataloader/detail/Utility.hpp> + +#include <lexy/encoding.hpp> +#include <lexy/input/buffer.hpp> + +#include <dryad/node_map.hpp> + +namespace ovdl { + struct File { + using buffer_ids = detail::TypeRegister< + lexy::buffer<lexy::default_encoding, void>, + lexy::buffer<lexy::utf8_char_encoding, void>, + lexy::buffer<lexy::utf8_encoding, void>, + lexy::buffer<lexy::utf16_encoding, void>, + lexy::buffer<lexy::utf32_encoding, void>, + lexy::buffer<lexy::byte_encoding, void>>; + + explicit File(const char* path); + + const char* path() const noexcept; + + bool is_valid() const noexcept; + + template<typename Encoding, typename MemoryResource = void> + constexpr bool is_buffer() const { + return buffer_ids::type_id<lexy::buffer<Encoding, MemoryResource>>() + 1 == _buffer.index(); + } + + template<typename Encoding, typename MemoryResource = void> + lexy::buffer<Encoding, MemoryResource>* try_get_buffer_as() { + return std::get_if<lexy::buffer<Encoding, MemoryResource>>(&_buffer); + } + + template<typename Encoding, typename MemoryResource = void> + const lexy::buffer<Encoding, MemoryResource>* try_get_buffer_as() const { + return std::get_if<lexy::buffer<Encoding, MemoryResource>>(&_buffer); + } + + template<typename Encoding, typename MemoryResource = void> + lexy::buffer<Encoding, MemoryResource>& get_buffer_as() { + assert((is_buffer<Encoding, MemoryResource>())); + return *std::get_if<lexy::buffer<Encoding, MemoryResource>>(&_buffer); + } + + template<typename Encoding, typename MemoryResource = void> + const lexy::buffer<Encoding, MemoryResource>& get_buffer_as() const { + assert((is_buffer<Encoding, MemoryResource>())); + return *std::get_if<lexy::buffer<Encoding, MemoryResource>>(&_buffer); + } + +#define SWITCH_LIST \ + X(1) \ + X(2) \ + X(3) \ + X(4) \ + X(5) \ + X(6) + +#define X(NUM) \ + case NUM: \ + return visitor(std::get<NUM>(_buffer)); + + template<typename Visitor> + decltype(auto) visit_buffer(Visitor&& visitor) { + switch (_buffer.index()) { + SWITCH_LIST + default: ovdl::detail::unreachable(); + } + } + + template<typename Return, typename Visitor> + Return visit_buffer(Visitor&& visitor) { + switch (_buffer.index()) { + SWITCH_LIST + default: ovdl::detail::unreachable(); + } + } + + template<typename Visitor> + decltype(auto) visit_buffer(Visitor&& visitor) const { + switch (_buffer.index()) { + SWITCH_LIST + default: ovdl::detail::unreachable(); + } + } + + template<typename Return, typename Visitor> + Return visit_buffer(Visitor&& visitor) const { + switch (_buffer.index()) { + SWITCH_LIST + default: ovdl::detail::unreachable(); + } + } +#undef X +#undef SWITCH_LIST + + protected: + const char* _path; + detail::type_prepend_t<buffer_ids::variant_type, std::monostate> _buffer; + }; + + template<typename NodeT> + struct BasicFile : File { + using node_type = NodeT; + + template<typename Encoding, typename MemoryResource = void> + explicit BasicFile(const char* path, lexy::buffer<Encoding, MemoryResource>&& buffer) + : File(path) { + _buffer = static_cast<std::remove_reference_t<decltype(buffer)>&&>(buffer); + } + + template<typename Encoding, typename MemoryResource = void> + explicit BasicFile(lexy::buffer<Encoding, MemoryResource>&& buffer) + : File("") { + _buffer = static_cast<std::remove_reference_t<decltype(buffer)>&&>(buffer); + } + + void set_location(const node_type* n, NodeLocation loc) { + _map.insert(n, loc); + } + + NodeLocation location_of(const node_type* n) const { + auto result = _map.lookup(n); + DRYAD_ASSERT(result != nullptr, "every Node should have a NodeLocation"); + return *result; + } + + protected: + dryad::node_map<const node_type, NodeLocation> _map; + }; +}
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