Emscripten: use Linux file system implementation

Author: TheMostDiligent

Platforms/Emscripten/CMakeLists.txt

@@ -14,6 +14,7 @@ set(INTERFACE
 set(SOURCE
     src/EmscriptenDebug.cpp
     src/EmscriptenFileSystem.cpp
+    ../Linux/src/LinuxFileSystem.cpp
 )
 
 add_library(Diligent-EmscriptenPlatform ${SOURCE} ${INTERFACE} ${PLATFORM_INTERFACE_HEADERS})

Platforms/Emscripten/interface/EmscriptenFileSystem.hpp

@@ -31,30 +31,15 @@
 
 #include "../../Basic/interface/BasicFileSystem.hpp"
 #include "../../Basic/interface/StandardFile.hpp"
+#include "../../Linux/interface/LinuxFileSystem.hpp"
 
 namespace Diligent
 {
 
 using EmscriptenFile = StandardFile;
 
-struct EmscriptenFileSystem : public BasicFileSystem
+struct EmscriptenFileSystem : public LinuxFileSystem
 {
-public:
-    static EmscriptenFile* OpenFile(const FileOpenAttribs& OpenAttribs);
-
-    static bool FileExists(const Char* strFilePath);
-    static bool PathExists(const Char* strPath);
-
-    static bool CreateDirectory(const Char* strPath);
-    static void ClearDirectory(const Char* strPath, bool Recursive = false);
-    static void DeleteFile(const Char* strPath);
-    static bool DeleteDirectory(const Char* strPath);
-    static bool IsDirectory(const Char* strPath);
-
-    static SearchFilesResult Search(const Char* SearchPattern);
-    static SearchFilesResult SearchRecursive(const Char* Dir, const Char* SearchPattern);
-
-    static std::string GetCurrentDirectory();
     static std::string GetLocalAppDataDirectory(const char* AppName = nullptr, bool Create = true);
 };
 

Platforms/Emscripten/src/EmscriptenFileSystem.cpp

@@ -24,95 +24,12 @@
  *  of the possibility of such damages.
  */
 
-#include <stdio.h>
-#include <unistd.h>
-#include <cstdio>
-
 #include "EmscriptenFileSystem.hpp"
-#include "Errors.hpp"
 #include "DebugUtilities.hpp"
 
 namespace Diligent
 {
 
-EmscriptenFile* EmscriptenFileSystem::OpenFile(const FileOpenAttribs& OpenAttribs)
-{
-    EmscriptenFile* pFile = nullptr;
-    try
-    {
-        pFile = new EmscriptenFile{OpenAttribs};
-    }
-    catch (const std::runtime_error& err)
-    {
-    }
-    return pFile;
-}
-
-bool EmscriptenFileSystem::FileExists(const Char* strFilePath)
-{
-    FileOpenAttribs OpenAttribs;
-    OpenAttribs.strFilePath = strFilePath;
-    BasicFile   DummyFile{OpenAttribs};
-    const auto& Path   = DummyFile.GetPath(); // This is necessary to correct slashes
-    FILE*       pFile  = fopen(Path.c_str(), "r");
-    bool        Exists = (pFile != nullptr);
-    if (Exists)
-        fclose(pFile);
-    return Exists;
-}
-
-bool EmscriptenFileSystem::PathExists(const Char* strPath)
-{
-    UNSUPPORTED("Not implemented");
-    return false;
-}
-
-bool EmscriptenFileSystem::CreateDirectory(const Char* strPath)
-{
-    UNSUPPORTED("Not implemented");
-    return false;
-}
-
-void EmscriptenFileSystem::ClearDirectory(const Char* strPath, bool Recursive)
-{
-    UNSUPPORTED("Not implemented");
-}
-
-void EmscriptenFileSystem::DeleteFile(const Char* strPath)
-{
-    remove(strPath);
-}
-
-bool EmscriptenFileSystem::DeleteDirectory(const Char* strPath)
-{
-    UNSUPPORTED("Not implemented");
-    return false;
-}
-
-bool EmscriptenFileSystem::IsDirectory(const Char* strPath)
-{
-    UNSUPPORTED("Not implemented");
-    return false;
-}
-
-EmscriptenFileSystem::SearchFilesResult EmscriptenFileSystem::Search(const Char* SearchPattern)
-{
-    UNSUPPORTED("Not implemented");
-    return EmscriptenFileSystem::SearchFilesResult{};
-}
-
-EmscriptenFileSystem::SearchFilesResult EmscriptenFileSystem::SearchRecursive(const Char* Dir, const Char* SearchPattern)
-{
-    UNSUPPORTED("Not implemented");
-    return EmscriptenFileSystem::SearchFilesResult{};
-}
-
-std::string EmscriptenFileSystem::GetCurrentDirectory()
-{
-    UNSUPPORTED("Not implemented");
-    return std::string();
-}
-
 std::string EmscriptenFileSystem::GetLocalAppDataDirectory(const char* AppName, bool Create)
 {
     UNSUPPORTED("Not implemented");

Platforms/Linux/src/LinuxFileSystem.cpp

@@ -1,5 +1,5 @@
 /*
- *  Copyright 2019-2023 Diligent Graphics LLC
+ *  Copyright 2019-2024 Diligent Graphics LLC
  *  Copyright 2015-2019 Egor Yusov
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
@@ -45,7 +45,7 @@
 namespace Diligent
 {
 
-#if PLATFORM_LINUX || PLATFORM_APPLE
+#if PLATFORM_LINUX || PLATFORM_APPLE || PLATFORM_EMSCRIPTEN
 LinuxFile* LinuxFileSystem::OpenFile(const FileOpenAttribs& OpenAttribs)
 {
     LinuxFile* pFile = nullptr;