Data structures ready!!

include/fsm.h

@@ -0,0 +1,77 @@
+#ifndef __FSM__
+#define __FSM__
+
+typedef struct fsm_ fsm_t;
+typedef struct state_ state_t;
+
+#define MAX_INP_BUFFER_SIZE         128
+#define MAX_TRANSITION_TABLE_SIZE   128
+#define MAX_STATE_NAME_SIZE         32
+#define MAX_FSM_NAME_SIZE           32
+#define MAX_TRANSITION_KEY_SIZE     64
+
+/*Custom-defined datatype
+* to define boolean value
+* for FSM*/
+typedef enum{
+
+    FSM_FALSE,
+    FSM_TRUE
+
+}fsm_bool_t;
+
+
+/*This data structure act similar 
+* to the behaviour of transition 
+* function.*/
+typedef struct tt_entry_{
+
+    /* The input symbol */
+    char transition_key[MAX_TRANSITION_KEY_SIZE];
+
+    /* Size of the input symbol */
+    unsigned int transition_key_size;
+
+    /* Next state: The state which is the output
+    *  of transition function, i.e. 
+    *  f(state_i, input_symbol) = (state_i+1)*/
+    state_t *next_state;
+
+}tt_entry_t;
+
+typedef struct tt_{
+    tt_entry_t  tt_entry[MAX_TRANSITION_TABLE_SIZE];
+}tt_t;
+
+struct state_{
+
+    /*Name/identifier of the state.
+    * This should be unique*/
+    char state_name[MAX_STATE_NAME_SIZE];
+
+    /*Transition table of the state*/
+    tt_t state_trans_table;
+
+    /*Boolean value to distinguish b/w 
+    * accept/final state or vice-versa*/
+    fsm_bool_t is_final;
+};
+
+struct fsm_{
+
+    /*Initial state of FSM to start with*/
+    state_t *initial_state;
+
+    /*Name of FSM*/
+    char fsm_name[MAX_FSM_NAME_SIZE];
+
+    /*Input data fed by application to parse
+    * by FSM library*/
+    unsigned int input_buffer_size;
+
+    /*Pointer which point to the current input
+    * from input buffer*/
+    unsigned int input_buffer_cursor;
+};
+
+#endif