Optimization

database.h

@@ -169,7 +169,7 @@ void remove_admin(char* role){
     }
     char line[100];
     while(fgets(line,100,fp) != NULL){
-        if(line[0] == '#') {
+        if(unlikely(line[0] == '#')) {
             fprintf(fp2,"%s",line);
             continue;
         }
@@ -194,7 +194,7 @@ int basic_get_row_count(int end, FILE *fp){
     while(!feof(fp)&&!ferror(fp)){
         char buffer[100];
         fgets(buffer, sizeof(buffer),fp);
-        if(buffer[0] == '#' || buffer[0] == '\0'){//catch comment line and ignore
+        if(unlikely(buffer[0] == '#' || buffer[0] == '\0')){//catch comment line and ignore
             continue;
         }
         colmun_count++;
@@ -223,7 +223,7 @@ struct inventory read_db_invt(){//please open file in read mode
         for(INVENTORY j=category;j<=ENDOFINVENTORY;j++){
             char buffer[100];
             fgets(buffer, sizeof(buffer),fp);
-            if(buffer[0] == '#'){//catch comment line and ignore
+            if(unlikely(buffer[0] == '#')){//catch comment line and ignore
                 j--;//decrement j to prevent skipping next column
             }else{
                 buffer[strlen(buffer)] = '\0';
@@ -265,8 +265,6 @@ struct inventory read_db_invt(){//please open file in read mode
     fclose(fp);
     db.db.init_status = true;
     return db;
-
-
 }
 struct transaction read_db_tran(){
     FILE* fp = fopen(TRANSACTION_DB, "r");
@@ -285,7 +283,7 @@ struct transaction read_db_tran(){
         for(TRANSACTION j=date;j<=ENDOFTRANSACTION;j++){
             char buffer[100];
             fgets(buffer, sizeof(buffer),fp);
-            if(buffer[0] == '#'){//catch comment line and ignore
+            if(unlikely(buffer[0] == '#')){//catch comment line and ignore
                 j--;//decrement j to prevent skipping next column
             }else{
                 buffer[strlen(buffer)] = '\0';
@@ -344,7 +342,7 @@ struct user read_db_user(){
         for(USER j=name;j<=ENDOFUSER;j++){
             char buffer[100];
             fgets(buffer, sizeof(buffer),fp);
-            if(buffer[0] == '#'){//catch comment line and ignore
+            if(unlikely(buffer[0] == '#')){//catch comment line and ignore
                 j--;//decrement j to prevent skipping next column
             }else{
                 buffer[strlen(buffer)] = '\0';//prevent any garbage value
@@ -463,15 +461,12 @@ bool update_db_invt(struct inventory invt){
         return false;
     }
     for(int i=0;i<invt.db.row_count;i++){
-        if(invt.row[i].barcode == -1024)//skip create new row
+        if(invt.row[i].barcode == -1024 || invt.row[i].isdeleted == true)//skip create new row
             continue;
-        if(invt.row[i].isdeleted == true){
-            continue;
-        }
         for(INVENTORY j=category;j<=ENDOFINVENTORY;j++){
             char buffer[100];
             do{
-                if(feof(fpR)){
+                if(unlikely(feof(fpR))){
                     break;
                 }
                 fgets(buffer, sizeof(buffer),fpR);
@@ -527,7 +522,7 @@ bool update_db_tran(struct transaction tran){
         for(TRANSACTION j=date;j<=ENDOFTRANSACTION;j++){
             char buffer[100];
             do{
-                if(feof(fpR)){
+                if(unlikely(feof(fpR))){
                     break;
                 }
                 fgets(buffer, sizeof(buffer),fpR);
@@ -582,7 +577,7 @@ bool update_db_user(struct user user){
         for(USER j=name;j<=ENDOFUSER;j++){
             char buffer[100];
             do{
-                if(feof(fpR)){
+                if(unlikely(feof(fpR))){
                     break;
                 }
                 fgets(buffer, sizeof(buffer),fpR);

tran_control.h

@@ -133,7 +133,7 @@ void add_tran(){
         free(row);
         return;
     }
-    if(row == NULL || !append_transaction_db(row)){
+    if(!row || !append_transaction_db(row)){
         printf("Failed to add item\n");
     }else{
         printf("Item added\n");
@@ -165,7 +165,7 @@ struct transaction update_tran(struct transaction db,int index){
     item_inputer("ID",LONG,&db.row[index].id,true);
     item_inputer("Barcode",LONG,&db.row[index].barcode,true);
     
-    if(!update_db_tran(db)){
+    if(unlikely(!update_db_tran(db))){
         printf("Failed to update transaction\n");
         exit(1);//exit program to prevent errors
     }else{
@@ -180,7 +180,7 @@ struct transaction update_tran(struct transaction db,int index){
 
 struct transaction remove_tran(struct transaction db,int index){
     db.row[index].isdeleted = true;
-    if(!update_db_tran(db)){
+    if(unlikely(!update_db_tran(db))){
         printf("Failed to delete transaction\n");
         exit(1);//exit program to prevent errors
     }else{

user_control.h

@@ -90,7 +90,7 @@ struct user add_user(struct user db){
         return db;
     }
     
-    if(!append_user(temprow)){
+    if(unlikely(!append_user(temprow))){
         printf("Failed to add user\n");
         exit(1);//exit program to prevent errors
     }else{
@@ -111,7 +111,7 @@ struct user edit_user(struct user db,int index){
     item_inputer("id",LONG,&db.row[index].id,true);
     item_inputer("role",STRING,&db.row[index].role,true);
 
-    if(!update_db_user(db)){
+    if(unlikely(!update_db_user(db))){
         printf("Failed to update user\n");
         exit(1);//exit program to prevent errors
     }else{
@@ -125,7 +125,7 @@ struct user edit_user(struct user db,int index){
 }
 struct user delete_user(struct user db,int index){
     db.row[index].isdeleted = true;
-    if(!update_db_user(db)){
+    if(unlikely(!update_db_user(db))){
         printf("Failed to delete user\n");
         exit(1);//exit program to prevent errors
     }else{

utils.h

@@ -14,7 +14,10 @@
 #include <stdio_ext.h>
 #endif
 #define SIZE_OF_PAGE 20
-
+#ifndef likely
+#define likely(x) __builtin_expect(!!(x), 1)
+#define unlikely(x) __builtin_expect(!!(x), 0)
+#endif
 void Cls(){
     #ifdef _WIN32
         system("cls");