1 /* Copyright 2015 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 16 // Printf variants that place their output in a C++ string. 17 // 18 // Usage: 19 // string result = strings::Printf("%d %s\n", 10, "hello"); 20 // strings::Appendf(&result, "%d %s\n", 20, "there"); 21 22 #ifndef TENSORFLOW_CORE_PLATFORM_STRINGPRINTF_H_ 23 #define TENSORFLOW_CORE_PLATFORM_STRINGPRINTF_H_ 24 25 #include <stdarg.h> 26 27 #include <string> 28 29 #include "tensorflow/core/platform/macros.h" 30 #include "tensorflow/core/platform/types.h" 31 32 namespace tensorflow { 33 namespace strings { 34 35 // Return a C++ string 36 extern std::string Printf(const char* format, ...) 37 // Tell the compiler to do printf format string checking. 38 TF_PRINTF_ATTRIBUTE(1, 2); 39 40 // Append result to a supplied string 41 extern void Appendf(std::string* dst, const char* format, ...) 42 // Tell the compiler to do printf format string checking. 43 TF_PRINTF_ATTRIBUTE(2, 3); 44 45 // Lower-level routine that takes a va_list and appends to a specified 46 // string. All other routines are just convenience wrappers around it. 47 extern void Appendv(std::string* dst, const char* format, va_list ap); 48 49 } // namespace strings 50 } // namespace tensorflow 51 52 #endif // TENSORFLOW_CORE_PLATFORM_STRINGPRINTF_H_ 53