1 files changed, 155 insertions, 0 deletions
diff --git a/libutils/Printer.cpp b/libutils/Printer.cpp
new file mode 100644
index 00000000..b062ef0a
--- /dev/null
+++ b/libutils/Printer.cpp
@@ -0,0 +1,155 @@
+/*
+ * 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>
+
+#ifndef __BIONIC__
+#define fdprintf dprintf
+#endif
+
+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;
+    if (vasprintf(&formattedString, format, arglist) < 0) { // returns -1 on error
+        ALOGE("%s: Failed to format string", __FUNCTION__);
+        return;
+    }
+    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;
+    }
+
+    fdprintf(mFd, mFormatString, mPrefix, string);
+}
+
+/*
+ * 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(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