1 files changed, 107 insertions, 0 deletions
diff --git a/trebuchet/traceutils/src/TraceUtils.kt b/trebuchet/traceutils/src/TraceUtils.kt
new file mode 100644
index 0000000..6f2bd76
--- /dev/null
+++ b/trebuchet/traceutils/src/TraceUtils.kt
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
+import trebuchet.extractors.ExtractorRegistry
+import trebuchet.extras.InputStreamAdapter
+import trebuchet.extras.findSampleData
+import trebuchet.importers.ImporterRegistry
+import trebuchet.io.BufferProducer
+import trebuchet.io.StreamingReader
+import trebuchet.util.PrintlnImportFeedback
+import java.io.File
+import java.io.OutputStream
+
+fun validateSrcDest(source: File, destDir: File) {
+    if (!source.exists()) {
+        throw IllegalArgumentException("No such file '$source'")
+    }
+    if (!destDir.exists()) {
+        destDir.mkdirs()
+        if (!destDir.exists() && destDir.isDirectory) {
+            throw IllegalArgumentException("'$destDir' isn't a directory")
+        }
+    }
+}
+
+fun findTraces(stream: BufferProducer,
+               onlyKnownFormats: Boolean,
+               traceFound: (StreamingReader) -> Unit) {
+    val importFeedback = PrintlnImportFeedback()
+    try {
+        val reader = StreamingReader(stream)
+        reader.loadIndex(reader.keepLoadedSize.toLong())
+        val extractor = ExtractorRegistry.extractorFor(reader, importFeedback)
+        if (extractor != null) {
+            extractor.extract(reader, {
+                subStream -> findTraces(subStream, onlyKnownFormats, traceFound)
+            })
+        } else {
+            if (onlyKnownFormats) {
+                val importer = ImporterRegistry.importerFor(reader, importFeedback)
+                if (importer != null) {
+                    traceFound(reader)
+                }
+            } else {
+                traceFound(reader)
+            }
+        }
+    } catch (ex: Throwable) {
+        importFeedback.reportImportException(ex)
+    } finally {
+        stream.close()
+    }
+}
+
+fun copy(reader: StreamingReader, output: OutputStream) {
+    reader.windows.forEach {
+        val slice = it.slice
+        output.write(slice.buffer, slice.startIndex, slice.length)
+    }
+    var next = reader.source.next()
+    while (next != null) {
+        output.write(next.buffer, next.startIndex, next.length)
+        next = reader.source.next()
+    }
+}
+
+fun extract(source: File, destDir: File) {
+    validateSrcDest(source, destDir)
+    println("Extracting ${source.name} to ${destDir.path}")
+    var traceCount = 0
+    findTraces(InputStreamAdapter(source), onlyKnownFormats = false) {
+        trace ->
+        val destFile = File(destDir, "${source.nameWithoutExtension}_$traceCount")
+        println("Found subtrace, extracting to $destFile")
+        val outputStream = destFile.outputStream()
+        copy(trace, outputStream)
+        traceCount++
+    }
+
+}
+
+fun main(args: Array<String>) {
+    if (args.size != 2) {
+        println("Usage: <source file> <dest dir>")
+        return
+    }
+    try {
+        val source = File(args[0])
+        val destDir = File(args[1])
+        extract(source, destDir)
+    } catch (ex: Exception) {
+        println(ex.message)
+    }
+}