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authorMark Haines <mark.haines@matrix.org>2015-06-12 16:15:37 +0100
committerMark Haines <mark.haines@matrix.org>2015-06-12 16:15:37 +0100
commit6fe3b7eb73fb11e1cba27b28add5b14430b66259 (patch)
treee2e526e4f5593cb8d978f1b8955b80c9c2d88b4e /include/axolotl/pickle.hh
parent28541dd82a9e4a99661ba32905b8488d35e70fe3 (diff)
Move utils for pickling into a separate file
Diffstat (limited to 'include/axolotl/pickle.hh')
-rw-r--r--include/axolotl/pickle.hh164
1 files changed, 164 insertions, 0 deletions
diff --git a/include/axolotl/pickle.hh b/include/axolotl/pickle.hh
new file mode 100644
index 0000000..a2de4f0
--- /dev/null
+++ b/include/axolotl/pickle.hh
@@ -0,0 +1,164 @@
+#ifndef AXOLOTL_PICKLE_HH_
+#define AXOLOTL_PICKLE_HH_
+
+#include "axolotl/list.hh"
+#include "axolotl/crypto.hh"
+
+#include <cstring>
+#include <cstdint>
+
+namespace axolotl {
+
+static std::size_t pickle_length(
+ const std::uint32_t & value
+) {
+ return 4;
+}
+
+
+static std::uint8_t * pickle(
+ std::uint8_t * pos,
+ std::uint32_t value
+) {
+ pos += 4;
+ for (unsigned i = 4; i--;) { *(--pos) = value; value >>= 8; }
+ return pos + 4;
+}
+
+
+static std::uint8_t const * unpickle(
+ std::uint8_t const * pos, std::uint8_t const * end,
+ std::uint32_t & value
+) {
+ value = 0;
+ if (end - pos < 4) return end;
+ for (unsigned i = 4; i--;) { value <<= 8; value |= *(pos++); }
+ return pos;
+}
+
+static std::size_t pickle_length(
+ const bool & value
+) {
+ return 1;
+}
+
+
+static std::uint8_t * pickle(
+ std::uint8_t * pos,
+ bool value
+) {
+ *(pos++) = value ? 1 : 0;
+ return pos;
+}
+
+
+static std::uint8_t const * unpickle(
+ std::uint8_t const * pos, std::uint8_t const * end,
+ bool & value
+) {
+ if (pos == end) return end;
+ value = *(pos++);
+ return pos;
+}
+
+
+
+template<typename T, std::size_t max_size>
+std::size_t pickle_length(
+ axolotl::List<T, max_size> const & list
+) {
+ std::size_t length = pickle_length(std::uint32_t(list.size()));
+ for (auto const & value : list) {
+ length += pickle_length(value);
+ }
+ return length;
+}
+
+
+template<typename T, std::size_t max_size>
+std::uint8_t * pickle(
+ std::uint8_t * pos,
+ axolotl::List<T, max_size> const & list
+) {
+ pos = pickle(pos, std::uint32_t(list.size()));
+ for (auto const & value : list) {
+ pos = pickle(pos, value);
+ }
+ return pos;
+}
+
+
+template<typename T, std::size_t max_size>
+std::uint8_t const * unpickle(
+ std::uint8_t const * pos, std::uint8_t const * end,
+ axolotl::List<T, max_size> & list
+) {
+ std::uint32_t size;
+ pos = unpickle(pos, end, size);
+ while (size--) {
+ T * value = list.insert(list.end());
+ pos = unpickle(pos, end, *value);
+ }
+ return pos;
+}
+
+
+static std::uint8_t * pickle_bytes(
+ std::uint8_t * pos,
+ std::uint8_t const * bytes, std::size_t bytes_length
+) {
+ std::memcpy(pos, bytes, bytes_length);
+ return pos + bytes_length;
+}
+
+
+static std::uint8_t const * unpickle_bytes(
+ std::uint8_t const * pos, std::uint8_t const * end,
+ std::uint8_t * bytes, std::size_t bytes_length
+) {
+ if (end - pos < bytes_length) return end;
+ std::memcpy(bytes, pos, bytes_length);
+ return pos + bytes_length;
+}
+
+
+std::size_t pickle_length(
+ const Curve25519PublicKey & value
+);
+
+
+std::uint8_t * pickle(
+ std::uint8_t * pos,
+ const Curve25519PublicKey & value
+);
+
+
+std::uint8_t const * unpickle(
+ std::uint8_t const * pos, std::uint8_t const * end,
+ Curve25519PublicKey & value
+);
+
+
+std::size_t pickle_length(
+ const Curve25519KeyPair & value
+);
+
+
+std::uint8_t * pickle(
+ std::uint8_t * pos,
+ const Curve25519KeyPair & value
+);
+
+
+std::uint8_t const * unpickle(
+ std::uint8_t const * pos, std::uint8_t const * end,
+ Curve25519KeyPair & value
+);
+
+
+} // namespace axolotl
+
+
+
+
+#endif /* AXOLOTL_PICKLE_HH */