1 /* 2 * Copyright (C) 2013 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 #define LOG_TAG "Printer" 18 // #define LOG_NDEBUG 0 19 20 #include <utils/Printer.h> 21 #include <utils/String8.h> 22 #include <utils/Log.h> 23 24 #include <string.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 28 #ifndef __BIONIC__ 29 #define fdprintf dprintf 30 #endif 31 32 namespace android { 33 34 /* 35 * Implementation of Printer 36 */ Printer()37 Printer::Printer() { 38 // Intentionally left empty 39 } 40 ~Printer()41 Printer::~Printer() { 42 // Intentionally left empty 43 } 44 printFormatLine(const char * format,...)45 void Printer::printFormatLine(const char* format, ...) { 46 va_list arglist; 47 va_start(arglist, format); 48 49 char* formattedString; 50 51 #ifndef USE_MINGW 52 if (vasprintf(&formattedString, format, arglist) < 0) { // returns -1 on error 53 ALOGE("%s: Failed to format string", __FUNCTION__); 54 return; 55 } 56 #else 57 return; 58 #endif 59 60 va_end(arglist); 61 62 printLine(formattedString); 63 free(formattedString); 64 } 65 66 /* 67 * Implementation of LogPrinter 68 */ LogPrinter(const char * logtag,android_LogPriority priority,const char * prefix,bool ignoreBlankLines)69 LogPrinter::LogPrinter(const char* logtag, 70 android_LogPriority priority, 71 const char* prefix, 72 bool ignoreBlankLines) : 73 mLogTag(logtag), 74 mPriority(priority), 75 mPrefix(prefix ?: ""), 76 mIgnoreBlankLines(ignoreBlankLines) { 77 } 78 printLine(const char * string)79 void LogPrinter::printLine(const char* string) { 80 if (string == NULL) { 81 ALOGW("%s: NULL string passed in", __FUNCTION__); 82 return; 83 } 84 85 if (mIgnoreBlankLines || (*string)) { 86 // Simple case: Line is not blank, or we don't care about printing blank lines 87 printRaw(string); 88 } else { 89 // Force logcat to print empty lines by adding prefixing with a space 90 printRaw(" "); 91 } 92 } 93 printRaw(const char * string)94 void LogPrinter::printRaw(const char* string) { 95 __android_log_print(mPriority, mLogTag, "%s%s", mPrefix, string); 96 } 97 98 99 /* 100 * Implementation of FdPrinter 101 */ FdPrinter(int fd,unsigned int indent,const char * prefix)102 FdPrinter::FdPrinter(int fd, unsigned int indent, const char* prefix) : 103 mFd(fd), mIndent(indent), mPrefix(prefix ?: "") { 104 105 if (fd < 0) { 106 ALOGW("%s: File descriptor out of range (%d)", __FUNCTION__, fd); 107 } 108 109 // <indent><prefix><line> -- e.g. '%-4s%s\n' for indent=4 110 snprintf(mFormatString, sizeof(mFormatString), "%%-%us%%s\n", mIndent); 111 } 112 printLine(const char * string)113 void FdPrinter::printLine(const char* string) { 114 if (string == NULL) { 115 ALOGW("%s: NULL string passed in", __FUNCTION__); 116 return; 117 } else if (mFd < 0) { 118 ALOGW("%s: File descriptor out of range (%d)", __FUNCTION__, mFd); 119 return; 120 } 121 122 #ifndef USE_MINGW 123 fdprintf(mFd, mFormatString, mPrefix, string); 124 #endif 125 } 126 127 /* 128 * Implementation of String8Printer 129 */ String8Printer(String8 * target,const char * prefix)130 String8Printer::String8Printer(String8* target, const char* prefix) : 131 mTarget(target), 132 mPrefix(prefix ?: "") { 133 134 if (target == NULL) { 135 ALOGW("%s: Target string was NULL", __FUNCTION__); 136 } 137 } 138 printLine(const char * string)139 void String8Printer::printLine(const char* string) { 140 if (string == NULL) { 141 ALOGW("%s: NULL string passed in", __FUNCTION__); 142 return; 143 } else if (mTarget == NULL) { 144 ALOGW("%s: Target string was NULL", __FUNCTION__); 145 return; 146 } 147 148 mTarget->append(string); 149 mTarget->append("\n"); 150 } 151 152 /* 153 * Implementation of PrefixPrinter 154 */ PrefixPrinter(Printer & printer,const char * prefix)155 PrefixPrinter::PrefixPrinter(Printer& printer, const char* prefix) : 156 mPrinter(printer), mPrefix(prefix ?: "") { 157 } 158 printLine(const char * string)159 void PrefixPrinter::printLine(const char* string) { 160 mPrinter.printFormatLine("%s%s", mPrefix, string); 161 } 162 163 }; //namespace android 164