basic FSM app build

Makefile

@@ -1,27 +1,13 @@
 #Setting a default configuration if invoked with just "make":
-CFG ?= debug
+CFG?=debug
 
 # Config specific settings
 ifeq ($(CFG),debug)
-CFLAGS += -g -DDEBUG
+	CFLAGS=-g -DDEBUG
 else
-CFLAGS += -O3 -DNDEBUG
+	CFLAGS=-O3 -DNDEBUG
 endif
 
-inform:
-ifneq ($(CFG),release)
-ifneq ($(CFG),debug)
-	@echo "Invalid configuration "$(CFG)" specified."
-	@echo
-	@echo "Possible choices for configuration are 'CFG=release' and 'CFG=debug'"
-	@exit 1
-endif
-endif
-	@echo "Configuration "$(CFG)
-	@echo "--------------------------------------------------"
-
-rule : dep | inform
-
 BUILD_DIR=bin/$(CFG)
 OBJS_DIR=objs/$(CFG)
 LIBDIR=lib/${CFG}
@@ -31,25 +17,49 @@ SRCDIR=src
 
 APP=$(BUILD_DIR)/app
 APP_OBJECT=$(OBJS_DIR)/app.o
+APP_DEPFILES=$(OBJS_DIR)/app.d
 FSMLIB_NAME=fsm
 FSMLIB=$(LIBDIR)/lib$(FSMLIB_NAME)
-CODEDIRS=./src
+CODEDIRS=src
-INCDIRS=. ./include/ # can be list
+INCDIRS=./ ./include/ # can be list
 
 CC=gcc
-OPT=-O0
 #generate files that encode make rules for the .h dependencies
-DEPFLAGS=-MP -MD
+DEPFLAGS=-MMD -MP
 #automatically add the -I onto each include directory
-CFLAGS+=-Wall -Wextra $(foreach D,$(INCDIRS),-I$(D)) $(OPT) $(DEPFLAGS)
+CFLAGS+=-Wall -Wextra $(foreach D , $(INCDIRS) , -I$(D)) $(DEPFLAGS)
 
 # for-style iteration (foreach) and regular expression completions (wildcard)
-CFILES=$(foreach D, $(CODEDIRS),$(wildcard $(D)/*.c))
+CFILES=$(foreach D , $(CODEDIRS) , $(wildcard $(D)/*.c))
-# regular expression replacement
-OBJECTS=$(patsubst %.c,$(OBJS_DIR)/%.o,$(CFILES))
-DEPFILES=$(patsubst %.c,$(OBJS_DIR)/%.d,$(CFILES))
 
-all: $(FSMLIB) $(APP) | create_dir
+
+#WTF, this below code is f**ked me up.
+#didn't change anything but still works.
+#WHYYY???
+# regular expression replacement
+OBJECTS=$(patsubst $(SRCDIR)/%.c, $(OBJS_DIR)/%.o , $(CFILES))
+DEPFILES=$(patsubst $(SRCDIR)/%.c, $(OBJS_DIR)/%.d , $(CFILES))
+DEPFILES += $(APP_DEPFILES)
+
+# $(info CFILES: $(CFILES))
+# $(info OBJECTS: $(OBJECTS))
+# $(info DEPFILES: $(DEPFILES))
+# $(info APP_OBJECT: $(APP_OBJECT))
+# $(info APP_DEPFILES: $(APP_DEPFILES))
+
+all: create_dir inform $(FSMLIB) $(APP)
+
+inform:
+ifneq ($(CFG),release)
+ifneq ($(CFG),debug)
+	@echo "Invalid configuration $(CFG) specified."
+	@echo
+	@echo "Possible choices for configuration are 'CFG=release' and 'CFG=debug'"
+	@exit 1
+endif
+endif
+	@echo "Configuration $(CFG)"
+	@echo "--------------------------------------------------"
 
 create_dir:
 	mkdir -p $(BUILD_DIR)
@@ -57,18 +67,18 @@ create_dir:
 	mkdir -p $(LIBDIR)
 
 
-$(APP): $(APP_OBJECT) | create_dir
+$(APP): $(APP_OBJECT) $(FSMLIB).a
-	$(CC) -o $@ $^ -L $(LIBDIR) -l$(FSMLIB_NAME)
+	$(CC) -o $@ $^ -L$(LIBDIR) -l$(FSMLIB_NAME)
 
-$(FSMLIB): $(OBJECTS) | create_dir
+$(FSMLIB): $(OBJECTS)
-	ar cr $(LIBDIR)/${FSMLIB}.a ${OBJECTS}
+	ar cr $(FSMLIB).a $(OBJECTS)
 
 # only want the .c file dependency here, thus $< instead of $^.
 #
-$(OBJS_DIR)/%.o:$(SRCDIR)/%.c | create_dir
+$(OBJS_DIR)/%.o: $(SRCDIR)/%.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
-$(OBJS_DIR)/%.o:%.c | create_dir
+$(OBJS_DIR)/%.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 clean:

app.c

@@ -1,15 +1,140 @@
 #include <stdio.h>
 #include <memory.h>
-#include <fsm.h>
+#include <string.h>
+#include "fsm.h"
+
+#define MAX_FSM_STATE 24
+
+#define modify_string(state,num) #state ## #num
+#define modify_var(state,num) state ## num
+
+state_t *fsm_states[MAX_FSM_STATE];
+
+
+void print_fsm(fsm_t *fsm){
+
+    printf("FSM name : %s\n", fsm->fsm_name);
+    printf("States : ");
+    char state[6];
+    for(unsigned int i = 0 ; i < fsm->state_count ; i++ ){
+        sprintf(state,"q%1d",i);
+        printf("%s", state);
+
+        if( i < fsm->state_count - 1 )
+            printf(", ");
+    }
+    putchar('\n');
+
+    printf("Alphabets : %s\n", fsm->alphabet);
+    printf("Initial State : %s\n", fsm->initial_state->state_name);
+    printf("Final States : %s\n", fsm->final_states);
+
+    printf("Transition Table :\n");
+
+    printf("        |   1       0   \n");
+    printf("------------------------\n");
+    
+    
+    char state1[6] = {0};
+    char state2[6] = {0};
+    char state3[6] = {0};
+
+    tt_t *table_ptr = NULL;
+    tt_entry_t *entry_ptr = NULL;
+    for( unsigned int i = 0 ; i < fsm->state_count ; i++ ){
+    
+        strncpy(state1, fsm_states[i]->state_name, 
+                strlen(fsm_states[i]->state_name));
+
+        table_ptr = &(fsm_states[i]->state_trans_table);
+        FSM_ITERATE_TRANS_TABLE_BEGIN(table_ptr, entry_ptr){
+            
+            if( is_tt_entry_empty(entry_ptr) == FSM_FALSE ){
+                if( strcmp(entry_ptr->transition_key, "1") == 0 ){
+                    strncpy(state2, entry_ptr->next_state->state_name,
+                        strlen(entry_ptr->next_state->state_name));
+                }
+                else{
+                    strncpy(state3, entry_ptr->next_state->state_name,
+                        strlen(entry_ptr->next_state->state_name));
+                }
+            }
+
+        }FSM_ITERATE_TRANS_TABLE_END(table_ptr, entry_ptr)
+
+        printf("  %s    |   %s      %s  \n", state1, state2, state3);
+   
+    }
+
+}
 
 int main(){
 
-    fsm_t* fsm = create_new_fsm("FSM_1");
+    fsm_t *fsm = create_new_fsm("FSM_1", "0,1");
 
-    state_t* initial_state = create_new_state("q0", FSM_FALSE);
+    //States
-    set_fsm_initial_state(fsm, initial_state);
+    state_t *q0 = create_new_state("q0", FSM_FALSE, "FSM_1", fsm);
+    state_t *q1 = create_new_state("q1", FSM_TRUE, "FSM_1", fsm);
+    state_t *q2 = create_new_state("q2", FSM_TRUE, "FSM_1", fsm);
+    state_t *q3 = create_new_state("q3", FSM_FALSE, "FSM_1", fsm);
 
+    fsm_states[0] = q0;
+    fsm_states[1] = q1;
+    fsm_states[2] = q2;
+    fsm_states[3] = q3;
+
+    set_fsm_initial_state(fsm, q0);
+
+    //State q0
+    tt_t *trans_table = &(q0->state_trans_table);
+    create_and_insert_new_tt_entry(trans_table,
+                                    "0",
+                                    1,
+                                    q2);
     
+    create_and_insert_new_tt_entry(trans_table,
+                                    "1",
+                                    1,
+                                    q1);
+
+    //State q1
+    trans_table = &(q1->state_trans_table);
+    create_and_insert_new_tt_entry(trans_table,
+                                    "0",
+                                    1,
+                                    q2);
+    
+    create_and_insert_new_tt_entry(trans_table,
+                                    "1",
+                                    1,
+                                    q3);
+
+    //State q2
+    trans_table = &(q2->state_trans_table);
+    create_and_insert_new_tt_entry(trans_table,
+                                    "0",
+                                    1,
+                                    q3);
+
+    create_and_insert_new_tt_entry(trans_table,
+                                    "1",
+                                    1,
+                                    q1);
+    
+    //State q3
+    trans_table = &(q3->state_trans_table);
+    create_and_insert_new_tt_entry(trans_table,
+                                    "0",
+                                    1,
+                                    q3);
+    
+    create_and_insert_new_tt_entry(trans_table,
+                                    "1",
+                                    1,
+                                    q3);
+
+
+    print_fsm(fsm);
 
     return 0;
 }

include/fsm.h

@@ -9,6 +9,8 @@
 #define MAX_STATE_NAME_SIZE         32
 #define MAX_FSM_NAME_SIZE           32
 #define MAX_TRANSITION_KEY_SIZE     64
+#define MAX_ALP_BUFFER_SIZE         30
+#define MAX_FINAL_STATE             128
 
 
 /***Data structures and custom datatypes***/
@@ -61,6 +63,9 @@ struct state_{
     /*Boolean value to distinguish b/w 
     * accept/final state or vice-versa*/
     fsm_bool_t is_final;
+
+    /*FSM which the current state belongs to*/
+    char fsm[MAX_FSM_NAME_SIZE];
 };
 
 struct fsm_{
@@ -68,6 +73,15 @@ struct fsm_{
     /*Initial state of FSM to start with*/
     state_t *initial_state;
 
+    /*Number of states in FSM*/
+    unsigned int state_count;
+
+    /*Set of alphabet*/
+    char alphabet[MAX_ALP_BUFFER_SIZE];
+
+    /*Set of final/accept states*/
+    char final_states[MAX_FINAL_STATE];
+
     /*Name of FSM*/
     char fsm_name[MAX_FSM_NAME_SIZE];
 
@@ -87,18 +101,20 @@ struct fsm_{
 /***Function Prototypes***/
 
 fsm_t*
-create_new_fsm(const char *fsm_name);
+create_new_fsm(const char *fsm_name, const char *inp_alpha);
 
 state_t*
-create_new_state(char *state_name,
+create_new_state(const char *state_name,
-                    fsm_bool_t is_final);
+                    fsm_bool_t is_final,
+                    const char *fsm_name,
+                    fsm_t *fsm);
 
 void
 set_fsm_initial_state(fsm_t *fsm, state_t *state);
 
 tt_entry_t*
 create_and_insert_new_tt_entry(tt_t *trans_table,
-                                char *transition_key,
+                                const char *transition_key,
                                 unsigned int sizeof_key,
                                 state_t* next_state);
 
@@ -110,7 +126,7 @@ get_next_empty_tt_entry(tt_t *trans_table);
 static inline fsm_bool_t
 is_tt_entry_empty(tt_entry_t *tt_entry){
 
-    if(!tt_entry->next_state)
+    if( tt_entry != NULL && !tt_entry->next_state)
         return FSM_TRUE;
 
     return FSM_FALSE;

src/fsm.c

@@ -1,29 +1,41 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <memory.h>
+#include <assert.h>
 #include "fsm.h"
 
-fsm_t*
+fsm_t *
-create_new_fsm(const char* fsm_name)
+create_new_fsm(const char* fsm_name, const char *inp_alpha)
 {
 
     fsm_t *fsm = calloc(1, sizeof(fsm_t));
-    strncpy(fsm->fsm_name, fsm_name, MAX_FSM_NAME_SIZE - 1 );
+    strncpy(fsm->fsm_name, fsm_name, strlen(fsm_name) );
-    fsm->fsm_name[MAX_FSM_NAME_SIZE] = '\0';
+    fsm->fsm_name[strlen(fsm_name)] = '\0';
+    fsm->state_count = 0;
+    
+    strncpy(fsm->alphabet, inp_alpha, strlen(inp_alpha));
+    fsm->alphabet[strlen(inp_alpha)] = '\0';
+
+    memset(fsm->final_states, 0, 1);
+    memset(fsm->input_buffer, 0, 1);
+    fsm->input_buffer_cursor = 0;
+    fsm->input_buffer_size = 0;
     return fsm;
 
 }
 
-state_t*
+state_t *
-create_new_state(char *state_name,
+create_new_state(const char *state_name,
-                    fsm_bool_t is_final){
+                    fsm_bool_t is_final,
+                    const char *fsm_name,
+                    fsm_t *fsm){
 
     assert(state_name);
 
     state_t *state = calloc(1, sizeof(state_t));
 
-    strncpy(state->state_name, state_name, MAX_STATE_NAME_SIZE - 1);
+    strncpy(state->state_name, state_name, strlen(state_name));
-    state->state_name[MAX_STATE_NAME_SIZE] = '\0';
+    state->state_name[strlen(state_name)] = '\0';
 
     tt_t *trans_table = &(state->state_trans_table);
     tt_entry_t *tt_entry_ptr = NULL;
@@ -34,6 +46,21 @@ create_new_state(char *state_name,
 
     state->is_final = is_final;
 
+    char temp_state_name[strlen(state_name)+2];
+    strncpy(temp_state_name, state_name, strlen(state_name));
+    temp_state_name[strlen(state_name)] = '\0';
+
+    if(state->is_final == FSM_TRUE){
+        strcat(temp_state_name,",");
+        strcat(fsm->final_states,temp_state_name);
+    }
+    // fsm->final_states[strlen(fsm->final_states)+2] = '\0';
+
+    strncpy(state->fsm, fsm_name, strlen(fsm_name));
+    state->fsm[strlen(fsm_name)] = '\0';
+
+    fsm->state_count++;
+
     return state;
 }
 
@@ -45,7 +72,7 @@ set_fsm_initial_state(fsm_t *fsm, state_t *state){
 }
 
 
-tt_entry_t*
+tt_entry_t *
 get_next_empty_tt_entry(tt_t *trans_table){
 
     tt_entry_t* tt_entry_ptr = NULL;
@@ -64,9 +91,9 @@ get_next_empty_tt_entry(tt_t *trans_table){
     return NULL;
 }
 
-tt_entry_t*
+tt_entry_t *
 create_and_insert_new_tt_entry(tt_t *trans_table,
-                                char *transition_key,
+                                const char *transition_key,
                                 unsigned int sizeof_key,
                                 state_t* next_state){