1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <stdarg.h> 20 #include <string> 21 22 namespace android { 23 namespace base { 24 25 // These printf-like functions are implemented in terms of vsnprintf, so they 26 // use the same attribute for compile-time format string checking. 27 28 // Returns a string corresponding to printf-like formatting of the arguments. 29 std::string StringPrintf(const char* fmt, ...) __attribute__((__format__(__printf__, 1, 2))); 30 31 // Appends a printf-like formatting of the arguments to 'dst'. 32 void StringAppendF(std::string* dst, const char* fmt, ...) 33 __attribute__((__format__(__printf__, 2, 3))); 34 35 // Appends a printf-like formatting of the arguments to 'dst'. 36 void StringAppendV(std::string* dst, const char* format, va_list ap) 37 __attribute__((__format__(__printf__, 2, 0))); 38 39 } // namespace base 40 } // namespace android 41