text: /*
   * \copyright Copyright 2013 Google Inc. All Rights Reserved.
   * \copyright Copyright 2015 All Rights Reserved. 
   * \license @{
   *
   * 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.
   *
   * @}
   */
  // Copyright 2002 and onwards Google Inc.
  //
  // Printf variants that place their output in a C++ string.
  //
  // Usage:
  //      string result = StringPrintf("%d %s\n", 10, "hello");
  //      SStringPrintf(&result, "%d %s\n", 10, "hello");
  //      StringAppendF(&result, "%d %s\n", 20, "there");
  
  #ifndef _BASE_STRINGPRINTF_H
  #define _BASE_STRINGPRINTF_H
  
  #include <stdarg.h>
  #include <string>
  using std::string;
  #include <vector>
  using std::vector;
  
  #include "quantsystem/common/base/port.h"
  namespace quantsystem {
  
  // Return a C++ string
  extern string StringPrintf(const char* format, ...)
      // Tell the compiler to do printf format string checking.
      PRINTF_ATTRIBUTE(1,2);
  
  // Store result into a supplied string and return it
  extern const string& SStringPrintf(string* dst, const char* format, ...)
      // Tell the compiler to do printf format string checking.
      PRINTF_ATTRIBUTE(2,3);
  
  // Append result to a supplied string
  extern void StringAppendF(string* dst, const char* format, ...)
      // Tell the compiler to do printf format string checking.
      PRINTF_ATTRIBUTE(2,3);
  
  // Lower-level routine that takes a va_list and appends to a specified
  // string.  All other routines are just convenience wrappers around it.
  extern void StringAppendV(string* dst, const char* format, va_list ap);
  
  // The max arguments supported by StringPrintfVector
  extern const int kStringPrintfVectorMaxArgs;
  
  // You can use this version when all your arguments are strings, but
  // you don't know how many arguments you'll have at compile time.
  // StringPrintfVector will LOG(FATAL) if v.size() > kStringPrintfVectorMaxArgs
  extern string StringPrintfVector(const char* format, const vector<string>& v);
  
  } // namespace quantsystem
  #endif /* _BASE_STRINGPRINTF_H */
  