keep the parts needed for moe_kernels (#3218)

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

@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2021, 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.
+ */
+
+#pragma once
+
+#if ENABLE_BF16
+#include <cuda_bf16.h>
+#endif // ENABLE_BF16
+#include <cuda_fp16.h>
+
+#include <memory>  // std::make_unique
+#include <sstream> // std::stringstream
+#include <string>
+#include <unordered_set>
+#include <vector>
+
+namespace tensorrt_llm::common
+{
+#if ENABLE_BF16
+static inline std::basic_ostream<char>& operator<<(std::basic_ostream<char>& stream, __nv_bfloat16 const& val)
+{
+    stream << __bfloat162float(val);
+    return stream;
+}
+#endif // ENABLE_BF16
+
+static inline std::basic_ostream<char>& operator<<(std::basic_ostream<char>& stream, __half const& val)
+{
+    stream << __half2float(val);
+    return stream;
+}
+
+inline std::string fmtstr(std::string const& s)
+{
+    return s;
+}
+
+inline std::string fmtstr(std::string&& s)
+{
+    return s;
+}
+
+#if defined(_MSC_VER)
+std::string fmtstr(char const* format, ...);
+#else
+std::string fmtstr(char const* format, ...) __attribute__((format(printf, 1, 2)));
+#endif
+
+// __PRETTY_FUNCTION__ is used for neat debugging printing but is not supported on Windows
+// The alternative is __FUNCSIG__, which is similar but not identical
+#if defined(_WIN32)
+#define __PRETTY_FUNCTION__ __FUNCSIG__
+#endif
+
+auto constexpr kDefaultDelimiter = ", ";
+
+template <typename U, typename TStream, typename T>
+inline TStream& arr2outCasted(TStream& out, T* arr, size_t size, char const* delim = kDefaultDelimiter)
+{
+    out << "(";
+    if (size > 0)
+    {
+        for (size_t i = 0; i < size - 1; ++i)
+        {
+            out << static_cast<U>(arr[i]) << delim;
+        }
+        out << static_cast<U>(arr[size - 1]);
+    }
+    out << ")";
+    return out;
+}
+
+template <typename TStream, typename T>
+inline TStream& arr2out(TStream& out, T* arr, size_t size, char const* delim = kDefaultDelimiter)
+{
+    return arr2outCasted<T>(out, arr, size, delim);
+}
+
+template <typename T>
+inline std::string arr2str(T* arr, size_t size, char const* delim = kDefaultDelimiter)
+{
+    std::stringstream ss;
+    return arr2out(ss, arr, size, delim).str();
+}
+
+template <typename T>
+inline std::string vec2str(std::vector<T> const& vec, char const* delim = kDefaultDelimiter)
+{
+    return arr2str(vec.data(), vec.size(), delim);
+}
+
+inline bool strStartsWith(std::string const& str, std::string const& prefix)
+{
+    return str.rfind(prefix, 0) == 0;
+}
+
+/// @brief Split a string into a set of strings using a delimiter
+std::unordered_set<std::string> str2set(std::string const& input, char delimiter);
+
+} // namespace tensorrt_llm::common