1 /* 2 * Copyright (C) 2014 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 <stdio.h> 21 #include <unistd.h> 22 23 #include <platform/bionic/macros.h> 24 25 class MallocXmlElem { 26 public: 27 // Name must be valid throughout lifetime of the object. 28 explicit MallocXmlElem(int fd, const char* name, fd_(fd)29 const char* attr_fmt = nullptr, ...) : fd_(fd), name_(name) { 30 dprintf(fd_, "<%s", name_); 31 if (attr_fmt != nullptr) { 32 va_list args; 33 va_start(args, attr_fmt); 34 write(fd_, " ", 1); 35 vdprintf(fd_, attr_fmt, args); 36 va_end(args); 37 } 38 write(fd_, ">", 1); 39 } 40 ~MallocXmlElem()41 ~MallocXmlElem() noexcept { 42 dprintf(fd_, "</%s>", name_); 43 } 44 Contents(const char * fmt,...)45 void Contents(const char* fmt, ...) { 46 va_list args; 47 va_start(args, fmt); 48 vdprintf(fd_, fmt, args); 49 va_end(args); 50 } 51 52 private: 53 int fd_; 54 const char* name_; 55 56 BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(MallocXmlElem); 57 }; 58