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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.
*/
#define LOG_TAG "Printer"
// #define LOG_NDEBUG 0
#include <utils/Printer.h>
#include <utils/String8.h>
#include <utils/Log.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
namespace android {
/*
* Implementation of Printer
*/
Printer::Printer() {
// Intentionally left empty
}
Printer::~Printer() {
// Intentionally left empty
}
void Printer::printFormatLine(const char* format, ...) {
va_list arglist;
va_start(arglist, format);
char* formattedString;
#ifndef _WIN32
if (vasprintf(&formattedString, format, arglist) < 0) { // returns -1 on error
ALOGE("%s: Failed to format string", __FUNCTION__);
va_end(arglist);
return;
}
#else
va_end(arglist);
return;
#endif
va_end(arglist);
printLine(formattedString);
free(formattedString);
}
/*
* Implementation of LogPrinter
*/
LogPrinter::LogPrinter(const char* logtag,
android_LogPriority priority,
const char* prefix,
bool ignoreBlankLines) :
mLogTag(logtag),
mPriority(priority),
mPrefix(prefix ?: ""),
mIgnoreBlankLines(ignoreBlankLines) {
}
void LogPrinter::printLine(const char* string) {
if (string == NULL) {
ALOGW("%s: NULL string passed in", __FUNCTION__);
return;
}
if (mIgnoreBlankLines || (*string)) {
// Simple case: Line is not blank, or we don't care about printing blank lines
printRaw(string);
} else {
// Force logcat to print empty lines by adding prefixing with a space
printRaw(" ");
}
}
void LogPrinter::printRaw(const char* string) {
__android_log_print(mPriority, mLogTag, "%s%s", mPrefix, string);
}
/*
* Implementation of FdPrinter
*/
FdPrinter::FdPrinter(int fd, unsigned int indent, const char* prefix) :
mFd(fd), mIndent(indent), mPrefix(prefix ?: "") {
if (fd < 0) {
ALOGW("%s: File descriptor out of range (%d)", __FUNCTION__, fd);
}
// <indent><prefix><line> -- e.g. '%-4s%s\n' for indent=4
snprintf(mFormatString, sizeof(mFormatString), "%%-%us%%s\n", mIndent);
}
void FdPrinter::printLine(const char* string) {
if (string == NULL) {
ALOGW("%s: NULL string passed in", __FUNCTION__);
return;
} else if (mFd < 0) {
ALOGW("%s: File descriptor out of range (%d)", __FUNCTION__, mFd);
return;
}
#ifndef _WIN32
dprintf(mFd, mFormatString, mPrefix, string);
#endif
}
/*
* Implementation of String8Printer
*/
String8Printer::String8Printer(String8* target, const char* prefix) :
mTarget(target),
mPrefix(prefix ?: "") {
if (target == NULL) {
ALOGW("%s: Target string was NULL", __FUNCTION__);
}
}
void String8Printer::printLine(const char* string) {
if (string == NULL) {
ALOGW("%s: NULL string passed in", __FUNCTION__);
return;
} else if (mTarget == NULL) {
ALOGW("%s: Target string was NULL", __FUNCTION__);
return;
}
mTarget->append(mPrefix);
mTarget->append(string);
mTarget->append("\n");
}
/*
* Implementation of PrefixPrinter
*/
PrefixPrinter::PrefixPrinter(Printer& printer, const char* prefix) :
mPrinter(printer), mPrefix(prefix ?: "") {
}
void PrefixPrinter::printLine(const char* string) {
mPrinter.printFormatLine("%s%s", mPrefix, string);
}
}; //namespace android
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