1 files changed, 65 insertions, 0 deletions
diff --git a/examples/logging.h b/examples/logging.h
new file mode 100644
index 0000000..c0bcad7
--- /dev/null
+++ b/examples/logging.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2019 The libgav1 Authors
+ *
+ * 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.
+ */
+
+#ifndef LIBGAV1_EXAMPLES_LOGGING_H_
+#define LIBGAV1_EXAMPLES_LOGGING_H_
+
+#include <cstddef>
+#include <cstdio>
+
+namespace libgav1 {
+namespace examples {
+
+#if !defined(LIBGAV1_EXAMPLES_ENABLE_LOGGING)
+#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
+#define LIBGAV1_EXAMPLES_ENABLE_LOGGING 0
+#else
+#define LIBGAV1_EXAMPLES_ENABLE_LOGGING 1
+#endif
+#endif
+
+#if LIBGAV1_EXAMPLES_ENABLE_LOGGING
+
+// Compile-time function to get the 'base' file_name, that is, the part of
+// a file_name after the last '/' or '\' path separator. The search starts at
+// the end of the string; the second parameter is the length of the string.
+constexpr const char* Basename(const char* file_name, size_t offset) {
+  return (offset == 0 || file_name[offset - 1] == '/' ||
+          file_name[offset - 1] == '\\')
+             ? file_name + offset
+             : Basename(file_name, offset - 1);
+}
+
+#define LIBGAV1_EXAMPLES_LOG_ERROR(error_string)                              \
+  do {                                                                        \
+    constexpr const char* libgav1_examples_basename =                         \
+        ::libgav1::examples::Basename(__FILE__, sizeof(__FILE__) - 1);        \
+    fprintf(stderr, "%s:%d (%s): %s.\n", libgav1_examples_basename, __LINE__, \
+            __func__, error_string);                                          \
+  } while (false)
+
+#else  // !LIBGAV1_EXAMPLES_ENABLE_LOGGING
+
+#define LIBGAV1_EXAMPLES_LOG_ERROR(error_string) \
+  do {                                           \
+  } while (false)
+
+#endif  // LIBGAV1_EXAMPLES_ENABLE_LOGGING
+
+}  // namespace examples
+}  // namespace libgav1
+
+#endif  // LIBGAV1_EXAMPLES_LOGGING_H_