feat: Implement resource system Phase 4.5 - ResourceFileSystem (4 files, +305 lines)

engine/src/Resources/FileArchive.cpp

@@ -0,0 +1,97 @@
+#include "Resources/FileArchive.h"
+#include <cstdio>
+
+namespace XCEngine {
+namespace Resources {
+
+FileArchive::FileArchive() = default;
+FileArchive::~FileArchive() {
+    Close();
+}
+
+bool FileArchive::Open(const Containers::String& path) {
+    m_archivePath = path;
+    m_isValid = true;
+    return true;
+}
+
+void FileArchive::Close() {
+    m_archivePath = "";
+    m_isValid = false;
+}
+
+bool FileArchive::Read(const Containers::String& fileName, void* buffer, size_t size, size_t offset) const {
+    if (!m_isValid) {
+        return false;
+    }
+    
+    Containers::String fullPath = m_archivePath;
+    if (!fullPath.EndsWith("/") && !fullPath.EndsWith("\\")) {
+        fullPath += "/";
+    }
+    fullPath += fileName;
+    
+    FILE* file = std::fopen(fullPath.CStr(), "rb");
+    if (!file) {
+        return false;
+    }
+    
+    if (offset > 0) {
+        std::fseek(file, static_cast<long>(offset), SEEK_SET);
+    }
+    
+    size_t bytesRead = std::fread(buffer, 1, size, file);
+    std::fclose(file);
+    
+    return bytesRead == size;
+}
+
+size_t FileArchive::GetSize(const Containers::String& fileName) const {
+    if (!m_isValid) {
+        return 0;
+    }
+    
+    Containers::String fullPath = m_archivePath;
+    if (!fullPath.EndsWith("/") && !fullPath.EndsWith("\\")) {
+        fullPath += "/";
+    }
+    fullPath += fileName;
+    
+    FILE* file = std::fopen(fullPath.CStr(), "rb");
+    if (!file) {
+        return 0;
+    }
+    
+    std::fseek(file, 0, SEEK_END);
+    size_t size = static_cast<size_t>(std::ftell(file));
+    std::fclose(file);
+    
+    return size;
+}
+
+bool FileArchive::Exists(const Containers::String& fileName) const {
+    if (!m_isValid) {
+        return false;
+    }
+    
+    Containers::String fullPath = m_archivePath;
+    if (!fullPath.EndsWith("/") && !fullPath.EndsWith("\\")) {
+        fullPath += "/";
+    }
+    fullPath += fileName;
+    
+    FILE* file = std::fopen(fullPath.CStr(), "rb");
+    if (file) {
+        std::fclose(file);
+        return true;
+    }
+    return false;
+}
+
+void FileArchive::Enumerate(const Containers::String& pattern, Containers::Array<Containers::String>& outFiles) const {
+    outFiles.Clear();
+    // TODO: Implement pattern-based enumeration
+}
+
+} // namespace Resources
+} // namespace XCEngine