DBC parser initial commit.

dbc_parser.h

@@ -0,0 +1,51 @@
+#ifndef DBC_PARSER_H
+#define DBC_PARSER_H
+
+#include <string>
+#include <vector>
+#include <cstdint>
+
+#include "dbc_database.h"
+
+/**
+ * @brief Minimal DBC parser.
+ *
+ * Supports:
+ * - BO_
+ * - SG_
+ * - CM_ BO_
+ * - CM_ SG_
+ *
+ * Ignores:
+ * - attributes
+ * - multiplexing
+ * - value tables
+ */
+class DbcParser {
+  public:
+    /**
+     * @brief Parse DBC file.
+     * @param filePath Path to input file.
+     * @return Parsed database.
+     * @throws std::runtime_error on file or parse errors.
+     */
+    DbcDatabase ParseFile (const std::string &filePath) const;
+
+  private:
+    static bool IsFrameLine (const std::string &line);
+    static bool IsSignalLine (const std::string &line);
+    static bool IsCommentLine (const std::string &line);
+    static std::string Trim (const std::string &text);
+    static std::vector<std::string> SplitReceivers (const std::string &text);
+    static std::uint32_t TryExtractPgn (std::uint32_t canId, bool &hasPgn);
+
+    static FrameInfo ParseFrameLine (const std::string &line);
+    static SignalInfo ParseSignalLine (const std::string &line);
+
+    static void ParseCommentLine (const std::string &line, DbcDatabase &database);
+
+    static FrameInfo *FindFrameById (DbcDatabase &database, std::uint32_t canId);
+    static SignalInfo *FindSignalByName (FrameInfo &frame, const std::string &signalName);
+};
+
+#endif /* DBC_PARSER_H */