Addendum to e3a7998 (and with that, to 51d01e1)

Author: Dutchman101

Shared/sdk/CChecksum.h

@@ -71,8 +71,23 @@ class CChecksum
 
         SString buf;
         if (!SharedUtil::FileLoadWithTimeout(strFilename, buf, 10000))
-            return SharedUtil::FileExists(strFilename) ? SString("Could not read: %s", strFilename.c_str())
-                                                       : SString("File not found: %s", strFilename.c_str());
+        {
+            if (!SharedUtil::FileExists(strFilename))
+                return SString("File not found: %s", strFilename.c_str());
+
+            CChecksum r;
+            errno = 0;
+            r.ulCRC = CRCGenerator::GetCRCFromFile(strFilename);
+            if (errno || !CMD5Hasher().Calculate(strFilename, r.md5))
+                return SString("Could not read: %s", strFilename.c_str());
+
+            if (hasMeta && GetFileAttributesExW(wide.c_str(), GetFileExInfoStandard, &attr) &&
+                sz == ((std::uint64_t(attr.nFileSizeHigh) << 32) | attr.nFileSizeLow) &&
+                mt == ((std::uint64_t(attr.ftLastWriteTime.dwHighDateTime) << 32) | attr.ftLastWriteTime.dwLowDateTime)) {
+                std::lock_guard<std::mutex> l(CacheMtx()); Cache()[key] = {sz, mt, r.ulCRC, r.md5};
+            }
+            return r;
+        }
 
         CChecksum r;
         r.ulCRC = CRCGenerator::GetCRCFromBuffer(buf.data(), buf.size());

Shared/sdk/SharedUtil.File.hpp

@@ -1664,8 +1664,6 @@ bool SharedUtil::FileLoadWithTimeout(const SString& filePath, SString& outBuffer
     DWORD fileSize = attr.nFileSizeLow;
     if (fileSize == 0)
         return true;
-    if (fileSize > 512 * 1024 * 1024)
-        return false;
 
     HANDLE fh = CreateFileW(wideFilePath.c_str(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
                             nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, nullptr);