1// Protocol Buffers - Google's data interchange format 2// Copyright 2012 Google Inc. All rights reserved. 3// https://developers.google.com/protocol-buffers/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31// from google3/base/stringprintf.h 32// 33// Printf variants that place their output in a C++ string. 34// 35// Usage: 36// string result = StringPrintf("%d %s\n", 10, "hello"); 37// SStringPrintf(&result, "%d %s\n", 10, "hello"); 38// StringAppendF(&result, "%d %s\n", 20, "there"); 39 40#ifndef GOOGLE_PROTOBUF_STUBS_STRINGPRINTF_H 41#define GOOGLE_PROTOBUF_STUBS_STRINGPRINTF_H 42 43#include <stdarg.h> 44#include <string> 45#include <vector> 46 47#include <google/protobuf/stubs/common.h> 48 49namespace google { 50namespace protobuf { 51 52// Return a C++ string 53LIBPROTOBUF_EXPORT extern string StringPrintf(const char* format, ...); 54 55// Store result into a supplied string and return it 56LIBPROTOBUF_EXPORT extern const string& SStringPrintf(string* dst, const char* format, ...); 57 58// Append result to a supplied string 59LIBPROTOBUF_EXPORT extern void StringAppendF(string* dst, const char* format, ...); 60 61// Lower-level routine that takes a va_list and appends to a specified 62// string. All other routines are just convenience wrappers around it. 63LIBPROTOBUF_EXPORT extern void StringAppendV(string* dst, const char* format, va_list ap); 64 65// The max arguments supported by StringPrintfVector 66LIBPROTOBUF_EXPORT extern const int kStringPrintfVectorMaxArgs; 67 68// You can use this version when all your arguments are strings, but 69// you don't know how many arguments you'll have at compile time. 70// StringPrintfVector will LOG(FATAL) if v.size() > kStringPrintfVectorMaxArgs 71LIBPROTOBUF_EXPORT extern string StringPrintfVector(const char* format, const vector<string>& v); 72 73} // namespace protobuf 74} // namespace google 75 76#endif // GOOGLE_PROTOBUF_STUBS_STRINGPRINTF_H 77