Update read_entrie_file function

include/io.h

@@ -16,7 +16,7 @@ typedef struct {
 } dirwalk_result_t;
 
 u64 get_file_length(FILE *fp);
-void read_entire_file(void *dst, u64 length, FILE *fp);
+void read_entire_file(void *dst, FILE *fp);
 dirwalk_result_t walk_dir(dirwalk_t **dirwalk, const char *filepath);
 
 #endif // !IO_H

src/io.c

@@ -33,7 +33,9 @@ u64 get_file_length(FILE *fp) {
   return length;
 }
 
-void read_entire_file(void *dst, u64 length, FILE *fp) {
+void read_entire_file(void *dst, FILE *fp) {
+  u64 length = get_file_length(fp);
+
   u64 current = ftell(fp);
 
   fseek(fp, 0, SEEK_SET);