3d308983a8
libmpq is a much simpler alternative to StormLib for reading MPQ archives. We use our own fork of libmpq: https://github.com/diasurgical/libmpq Impact: * DevilutionX is now a lot more portable. Unlike StormLib, libmpq only needs platform-specific code for Windows. * Locks around file access **removed** (instead we duplicate the file descriptor for streamed audio only). * RAM usage is **300 KiB** lower than StormLib. * Stripped release linux_x86_64 binary is **32 KiB** smaller. * Amiga build now hangs instead of crashing.
103 lines
2.2 KiB
C++
103 lines
2.2 KiB
C++
#pragma once
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#include <array>
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include "appfat.h"
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#include "diablo.h"
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#include "engine/game_assets.hpp"
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#include "utils/stdcompat/cstddef.hpp"
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namespace devilution {
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class SFile {
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public:
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explicit SFile(const char *path)
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{
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handle_ = OpenAsset(path);
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if (handle_ == nullptr) {
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if (!gbQuietMode) {
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app_fatal("Failed to open file:\n%s\n\n%s", path, SDL_GetError());
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}
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}
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}
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~SFile()
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{
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if (handle_ != nullptr)
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SDL_RWclose(handle_);
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}
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[[nodiscard]] bool Ok() const
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{
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return handle_ != nullptr;
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}
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[[nodiscard]] std::size_t Size() const
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{
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return SDL_RWsize(handle_);
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}
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bool Read(void *buffer, std::size_t len) const
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{
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return SDL_RWread(handle_, buffer, len, 1);
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}
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private:
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SDL_RWops *handle_;
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};
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template <typename T>
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void LoadFileInMem(const char *path, T *data)
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{
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SFile file { path };
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if (!file.Ok())
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return;
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const std::size_t fileLen = file.Size();
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if ((fileLen % sizeof(T)) != 0)
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app_fatal("File size does not align with type\n%s", path);
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file.Read(reinterpret_cast<byte *>(data), fileLen);
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}
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template <typename T>
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void LoadFileInMem(const char *path, T *data, std::size_t count)
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{
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SFile file { path };
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if (!file.Ok())
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return;
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file.Read(reinterpret_cast<byte *>(data), count * sizeof(T));
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}
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template <typename T, std::size_t N>
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void LoadFileInMem(const char *path, std::array<T, N> &data)
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{
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LoadFileInMem(path, data.data(), N);
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}
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/**
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* @brief Load a file in to a buffer
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* @param path Path of file
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* @param numRead Number of T elements read
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* @return Buffer with content of file
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*/
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template <typename T = byte>
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std::unique_ptr<T[]> LoadFileInMem(const char *path, std::size_t *numRead = nullptr)
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{
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SFile file { path };
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if (!file.Ok())
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return nullptr;
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const std::size_t fileLen = file.Size();
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if ((fileLen % sizeof(T)) != 0)
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app_fatal("File size does not align with type\n%s", path);
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if (numRead != nullptr)
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*numRead = fileLen / sizeof(T);
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std::unique_ptr<T[]> buf { new T[fileLen / sizeof(T)] };
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file.Read(reinterpret_cast<byte *>(buf.get()), fileLen);
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return buf;
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}
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} // namespace devilution
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