fix(vpkpp): PackFile::getBakeOutputDir unable to recognize parent directory of original file with backslash

Author: Starfelll

src/vpkpp/PackFile.cpp

@@ -637,18 +637,20 @@ std::vector<std::string> PackFile::verifyEntryChecksumsUsingCRC32() const {
 
 std::string PackFile::getBakeOutputDir(const std::string& outputDir) const {
 	std::string out = outputDir;
-	if (!out.empty()) {
-		string::normalizeSlashes(out, false);
-	} else {
+	if (out.empty()) {
 		out = this->fullFilePath;
 		auto lastSlash = out.rfind('/');
-		string::normalizeSlashes(out, false);
+		auto lastBackSlash = out.rfind('\\');
+		if (lastSlash == std::string::npos || (lastBackSlash != std::string::npos && lastBackSlash > lastSlash)) {
+			lastSlash = lastBackSlash;
+		}
 		if (lastSlash != std::string::npos) {
 			out = this->getFilepath().substr(0, lastSlash);
 		} else {
 			out = ".";
 		}
 	}
+	string::normalizeSlashes(out, false);
 	return out;
 }