Implement IPC using binary format

1 files changed, 32 insertions, 10 deletions

diff --git a/ipc.cpp b/ipc.cpp
index 7b6ea5d..9c96d5a 100644
--- a/ipc.cpp
+++ b/ipc.cpp
@@ -1,15 +1,37 @@
 enum Operation {
-	OP_I1,
-	OP_I2,
-	OP_I4,
-	OP_I8,
-	OP_U1,
-	OP_U2,
-	OP_U4,
-	OP_U8,
-	OP_STR,
-	OP_MOVE,
+	OP_NULL = 0,
+	OP_MOVE1,
+	OP_MOVE2,
+	OP_MOVE4,
+	OP_MOVE8,
 	OP_INSERT,
 	OP_DELETE,
 	OP_SHOW
 };
+
+void encode2(int16_t data, uint8_t *message, size_t offset) {
+	message[offset]     =  data & 0x00ff;
+	message[offset + 1] = (data & 0xff00) >> 8;
+}
+
+int16_t decode2(uint8_t *message, size_t offset) {
+	return message[offset] | ((int16_t)message[offset + 1] << 8);
+}
+
+void encode4(int32_t data, uint8_t *message, size_t offset) {
+	encode2( data & 0x0000ffff,        message, offset);
+	encode2((data & 0xffff0000) >> 16, message, offset + 2);
+}
+
+int32_t decode4(uint8_t *message, size_t offset) {
+	return decode2(message, offset) | ((int32_t)decode2(message, offset + 2) << 16);
+}
+
+void encode8(int64_t data, uint8_t *message, size_t offset) {
+	encode4( data & 0x00000000ffffffff,        message, offset);
+	encode4((data & 0xffffffff00000000) >> 32, message, offset + 4);
+}
+
+int64_t decode8(uint8_t *message, size_t offset) {
+	return decode4(message, offset) | ((int64_t)decode4(message, offset + 4) << 32);
+}