1 files changed, 127 insertions, 0 deletions
diff --git a/tools/incident_report/printer.cpp b/tools/incident_report/printer.cpp
new file mode 100644
index 000000000000..1ab6bd87913e
--- /dev/null
+++ b/tools/incident_report/printer.cpp
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#include "printer.h"
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define INITIAL_BUF_SIZE (16*1024)
+
+char const* SPACES = "                                                            ";
+const int SPACE_COUNT = strlen(SPACES);
+
+Out::Out(int fd)
+    :mOut(fd == STDOUT_FILENO ? stdout : fdopen(fd, "w")),
+     mBufSize(INITIAL_BUF_SIZE),
+     mBuf((char*)malloc(INITIAL_BUF_SIZE)),
+     mIndent(0),
+     mPendingIndent(false)
+{
+}
+
+Out::~Out()
+{
+    fclose(mOut);
+}
+
+int
+Out::reallocate(int size)
+{
+    if (size > mBufSize) {
+        char* p = (char*)malloc(size);
+        if (p != NULL) {
+            free(mBuf);
+            mBufSize = size;
+            mBuf = p;
+            return size;
+        }
+    }
+    return mBufSize;
+}
+
+void
+Out::printf(const char* format, ...)
+{
+    if (mPendingIndent) {
+        print_indent();
+        mPendingIndent = false;
+    }
+
+    int len;
+
+    va_list args;
+    va_start(args, format);
+
+    len = vsnprintf(mBuf, mBufSize, format, args);
+    bool truncated = (len >= mBufSize) && (reallocate(len) < len);
+    
+    len = vsnprintf(mBuf, mBufSize, format, args);
+    va_end(args);
+
+    if (len > 0) {
+        if (mIndent == 0) {
+            fwrite(mBuf, len, 1, mOut);
+        } else {
+            char* last = mBuf;
+            char* p;
+            do {
+                p = strchr(last, '\n');
+                int size = p != NULL ? p - last + 1 : strlen(last);
+                fwrite(last, size, 1, mOut);
+                if (p != NULL) {
+                    if (p[1] == '\0') {
+                        mPendingIndent = true;
+                    } else {
+                        print_indent();
+                    }
+                }
+                last = p+1;
+            } while (p != NULL);
+        }
+    }
+}
+
+void
+Out::indent()
+{
+    mPendingIndent = true;
+    mIndent += 2;
+}
+
+void
+Out::dedent()
+{
+    if (mIndent > 0) {
+        mIndent -= 2;
+    }
+}
+
+void
+Out::print_indent()
+{
+#if 0
+    fprintf(mOut, "[%d]", mIndent);
+#else
+    int indent = mIndent;
+    while (indent > SPACE_COUNT) {
+        fwrite(SPACES, SPACE_COUNT, 1, mOut);
+        indent -= SPACE_COUNT;
+    }
+    fwrite(SPACES + SPACE_COUNT - indent, indent, 1, mOut);
+#endif
+}