1 files changed, 68 insertions, 0 deletions
diff --git a/include/perfetto/ext/base/base64.h b/include/perfetto/ext/base/base64.h
new file mode 100644
index 000000000..030a83dc4
--- /dev/null
+++ b/include/perfetto/ext/base/base64.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+#ifndef INCLUDE_PERFETTO_EXT_BASE_BASE64_H_
+#define INCLUDE_PERFETTO_EXT_BASE_BASE64_H_
+
+#include <string>
+
+#include "perfetto/ext/base/optional.h"
+#include "perfetto/ext/base/string_view.h"
+#include "perfetto/ext/base/utils.h"  // For ssize_t.
+
+namespace perfetto {
+namespace base {
+
+// Returns the length of the destination string (included '=' padding).
+// Does NOT include the size of the string null terminator.
+inline size_t Base64EncSize(size_t src_size) {
+  return (src_size + 2) / 3 * 4;
+}
+
+// Returns the upper bound on the length of the destination buffer.
+// The actual decoded length might be <= the number returned here.
+inline size_t Base64DecSize(size_t src_size) {
+  return (src_size + 3) / 4 * 3;
+}
+
+// Does NOT null-terminate |dst|.
+ssize_t Base64Encode(const void* src,
+                     size_t src_size,
+                     char* dst,
+                     size_t dst_size);
+
+std::string Base64Encode(const void* src, size_t src_size);
+
+inline std::string Base64Encode(StringView sv) {
+  return Base64Encode(sv.data(), sv.size());
+}
+
+// Returns -1 in case of failure.
+ssize_t Base64Decode(const char* src,
+                     size_t src_size,
+                     uint8_t* dst,
+                     size_t dst_size);
+
+Optional<std::string> Base64Decode(const char* src, size_t src_size);
+
+inline Optional<std::string> Base64Decode(StringView sv) {
+  return Base64Decode(sv.data(), sv.size());
+}
+
+}  // namespace base
+}  // namespace perfetto
+
+#endif  // INCLUDE_PERFETTO_EXT_BASE_BASE64_H_