implemented file reading

simulator.c

@@ -1,5 +1,6 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #define RR_QUANTUM 2
 #define CNTXT_SWITCH 1
@@ -29,8 +30,23 @@ struct perf_info {
     int total_time_ctxt_switch;
 };
 
-struct pinfo * create_process(int id, int arrival_time, int execution_time, int priority) {
-    struct pinfo * info = {
+void print_perf(struct perf_info * perf) {
+    printf("Total time: %d\n", perf->total_time);
+    printf("Total number of context switches: %d\n", perf->total_nr_ctxt_switch);
+    printf("Total time spent on context switching: %d\n", perf->total_time_ctxt_switch);
+}
+
+void print_pinfo(struct pinfo * info) {
+    printf("<Process {\n");
+    printf("  PID: %d\n", info->id);
+    printf("  Arrival time: %d\n", info->arrival_time);
+    printf("  Execution time: %d\n", info->execution_time);
+    printf("  Priority: %d\n", info->priority);
+    printf("}>\n");
+}
+
+struct pinfo create_process(int id, int arrival_time, int execution_time, int priority) {
+    struct pinfo info = {
         id,
         arrival_time,
         execution_time,
@@ -43,11 +59,11 @@ struct pinfo * create_process(int id, int arrival_time, int execution_time, int
     return info;
 }
 
-struct perf_info * schedule_FCFS(struct pinfo * processes) {
+struct perf_info schedule_FCFS(struct pinfo * processes) {
     int current_time = 0;
     struct pinfo * process = processes;
 
-    struct perf_info * perf = {0, 0, 0};
+    struct perf_info perf = {0, 0, 0};
     
     while (process != NULL) {
         int wait_time = current_time - process->arrival_time;
@@ -60,35 +76,66 @@ struct perf_info * schedule_FCFS(struct pinfo * processes) {
 
         process = process->next_pinfo;
     }
-    perf->total_time = current_time;
+    perf.total_time = current_time;
     
     return perf;
 }
 
 
 struct pinfo * read_file() {
-    // TODO
+    FILE * file = fopen("tasks.csv", "r");
+    unsigned long buf_size = sizeof(char) * 64;
+    char * line = (char *) malloc(buf_size);
+    char * pid_str;
+    char * arrival_str;
+    char * execution_str;
+    char * prio_str;
 
+    struct pinfo * first = NULL;
+    struct pinfo * last = NULL;
+    struct pinfo process;
+
+    while (fgets(line, buf_size, file)) {
+        pid_str = strtok(line, " ");
+        arrival_str = strtok(NULL, " ");
+        execution_str = strtok(NULL, " ");
+        prio_str = strtok(NULL, " ");
+
+        process = create_process(
+            atoi(pid_str),
+            atoi(arrival_str),
+            atoi(execution_str),
+            atoi(prio_str)
+        );
+
+        // If linked list not initialized
+        if (first == NULL) {
+            first = &process;
+        }
+
+        // If there is an element in list
+        if (last != NULL) {
+            last->next_pinfo = &process;
+        }
+        last = &process;
+
+        print_pinfo(&process);
+    }
+    fclose(file);
+    return first;
 }
 
 void write_file(struct pinfo * process, struct perf_info * perf) {
     // TODO
 }
 
-void print_perf(struct perf_info * perf) {
-    println("Total time: %d\n", perf->total_time);
-    println("Total number of context switches: %d\n", perf->total_nr_ctxt_switch);
-    println("Total time spent on context switching: %d\n", perf->total_time_ctxt_switch);
-}
-
-
 int main() {
     struct pinfo * processes = read_file();
 
-    struct perf_info * perf = schedule_FCFS(processes);
+    /*struct perf_info perf = schedule_FCFS(processes);
 
-    write_file(processes, perf);
-    print_perf(perf);
+    write_file(processes, &perf);
+    print_perf(perf);*/
 
     return 0;
 }