Restructured AMS data parsing

src/ams/DataParser.h

@@ -0,0 +1,31 @@
+#ifndef _DATAPASERSER_H
+#define _DATAPASERSER_H
+
+#define DATA_TAG_NONE 0x00
+#define DATA_TAG_AUTO 0x01
+#define DATA_TAG_HDLC 0x7E
+#define DATA_TAG_LLC 0xE6
+#define DATA_TAG_DLMS 0x0F
+#define DATA_TAG_DSMR 0x2F
+#define DATA_TAG_MBUS 0x68
+#define DATA_TAG_GBT 0xE0
+#define DATA_TAG_GCM 0xDB
+
+#define DATA_PARSE_OK 0
+#define DATA_PARSE_FAIL -1
+#define DATA_PARSE_INCOMPLETE -2
+#define DATA_PARSE_BOUNDRY_FLAG_MISSING -3
+#define DATA_PARSE_HEADER_CHECKSUM_ERROR -4
+#define DATA_PARSE_FOOTER_CHECKSUM_ERROR -5
+#define DATA_PARSE_INTERMEDIATE_SEGMENT -6
+#define DATA_PARSE_FINAL_SEGMENT -7
+#define DATA_PARSE_UNKNOWN_DATA -9
+
+struct DataParserContext {
+    uint8_t type;
+    uint16_t length;
+    time_t timestamp;
+    uint8_t system_title[8];
+};
+
+#endif