From 07b33acee5463c64ca5fa0021128f821dc5aa104 Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <richard@matrix.org>
Date: Tue, 17 May 2016 18:45:28 +0100
Subject: [PATCH] C bindings for pickle functions

---
 include/olm/pickle.h | 50 ++++++++++++++++++++++++++++++++++++++++++++
 src/pickle.cpp       | 35 +++++++++++++++++++++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 include/olm/pickle.h

diff --git a/include/olm/pickle.h b/include/olm/pickle.h
new file mode 100644
index 0000000..4e46910
--- /dev/null
+++ b/include/olm/pickle.h
@@ -0,0 +1,50 @@
+/* Copyright 2015-2016 OpenMarket Ltd
+ *
+ * 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 OLM_PICKLE_H_
+#define OLM_PICKLE_H_
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define olm_pickle_uint32_length(value) 4
+uint8_t * olm_pickle_uint32(uint8_t * pos, uint32_t value);
+uint8_t const * olm_unpickle_uint32(
+    uint8_t const * pos, uint8_t const * end,
+    uint32_t *value
+);
+
+
+#define olm_pickle_bool_length(value) 1
+uint8_t * olm_pickle_bool(uint8_t * pos, int value);
+uint8_t const * olm_unpickle_bool(
+    uint8_t const * pos, uint8_t const * end,
+    int *value
+);
+
+#define olm_pickle_bytes_length(bytes, bytes_length) (bytes_length)
+uint8_t * olm_pickle_bytes(uint8_t * pos, uint8_t const * bytes,
+                           size_t bytes_length);
+uint8_t const * olm_unpickle_bytes(uint8_t const * pos, uint8_t const * end,
+                                   uint8_t * bytes, size_t bytes_length);
+
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif /* OLM_PICKLE_H */
diff --git a/src/pickle.cpp b/src/pickle.cpp
index 00f7cd4..1158306 100644
--- a/src/pickle.cpp
+++ b/src/pickle.cpp
@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 #include "olm/pickle.hh"
+#include "olm/pickle.h"
 
 std::uint8_t * olm::pickle(
     std::uint8_t * pos,
@@ -196,3 +197,37 @@ std::uint8_t const * olm::unpickle(
     );
     return pos;
 }
+
+////// pickle.h implementations
+
+uint8_t * olm_pickle_uint32(uint8_t * pos, uint32_t value) {
+    return olm::pickle(pos, value);
+}
+
+uint8_t const * olm_unpickle_uint32(
+    uint8_t const * pos, uint8_t const * end,
+    uint32_t *value
+) {
+    return olm::unpickle(pos, end, *value);
+}
+
+uint8_t * olm_pickle_bool(uint8_t * pos, int value) {
+    return olm::pickle(pos, (bool)value);
+}
+
+uint8_t const * olm_unpickle_bool(
+    uint8_t const * pos, uint8_t const * end,
+    int *value
+) {
+    return olm::unpickle(pos, end, *reinterpret_cast<bool *>(value));
+}
+
+uint8_t * olm_pickle_bytes(uint8_t * pos, uint8_t const * bytes,
+                           size_t bytes_length) {
+    return olm::pickle_bytes(pos, bytes, bytes_length);
+}
+
+uint8_t const * olm_unpickle_bytes(uint8_t const * pos, uint8_t const * end,
+                                   uint8_t * bytes, size_t bytes_length) {
+    return olm::unpickle_bytes(pos, end, bytes, bytes_length);
+}