add tensorrt_llm common and cutlass_extensions as 3rdparty (#3216)

Co-authored-by: BBuf <35585791+BBuf@users.noreply.github.com>

sgl-kernel/3rdparty/tensorrt_llm/common/stringUtils.cpp

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2022-2024, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "tensorrt_llm/common/stringUtils.h"
+#include "tensorrt_llm/common/assert.h"
+
+#include <cerrno>
+#include <cstdarg>
+#include <cstring>
+#include <iostream>
+#include <string>
+
+namespace tensorrt_llm::common
+{
+
+namespace
+{
+std::string vformat(char const* fmt, va_list args)
+{
+    va_list args0;
+    va_copy(args0, args);
+    auto const size = vsnprintf(nullptr, 0, fmt, args0);
+    if (size <= 0)
+        return "";
+
+    std::string stringBuf(size, char{});
+    auto const size2 = std::vsnprintf(&stringBuf[0], size + 1, fmt, args);
+
+    TLLM_CHECK_WITH_INFO(size2 == size, std::string(std::strerror(errno)));
+
+    return stringBuf;
+}
+
+} // namespace
+
+std::string fmtstr(char const* format, ...)
+{
+    va_list args;
+    va_start(args, format);
+    std::string result = vformat(format, args);
+    va_end(args);
+    return result;
+};
+
+std::unordered_set<std::string> str2set(std::string const& input, char delimiter)
+{
+    std::unordered_set<std::string> values;
+    if (!input.empty())
+    {
+        std::stringstream valStream(input);
+        std::string val;
+        while (std::getline(valStream, val, delimiter))
+        {
+            if (!val.empty())
+            {
+                values.insert(val);
+            }
+        }
+    }
+    return values;
+};
+
+} // namespace tensorrt_llm::common