Figuring out how to copy rom into memory

.gitignore

@@ -1 +1,2 @@
 a.out
+out.bin

ROM.bin

@@ -0,0 +1 @@
+trupi

example.bin

@@ -0,0 +1 @@
+zupa

main.c

@@ -2,9 +2,26 @@
 #include <stdlib.h>
 #include <string.h>
 
+long GetFileSize(FILE* f){
+    fseek(f, 0, SEEK_END);
+    long size = ftell(f);
+    fseek(f, 0, SEEK_SET);
+    return size;
+}
+
+void DumpMemory(char *memory, FILE *filename){
+    FILE *dump = fopen(filename, "wb");
+    fwrite(memory, 1, mem_size, dump);
+    fclose(dump);
+}
+
 int main(int argc, char **argv){
     
     long mem_size = 0;
+    char filename[255];
+    
+    FILE *rom = fopen("ROM.bin","rb");
+    mem_size = mem_size + GetFileSize(rom);
     
     //Handling arguments
     if(argc < 2){
@@ -15,23 +32,57 @@ int main(int argc, char **argv){
 	if(strcmp(argv[i], "-m") == 0 || strcmp(argv[i], "--memory") == 0){
 	    char *endptr;
 	    long convert = strtol(argv[i+1], &endptr, 10);
-	    mem_size = &endptr != NULL ? convert : mem_size;
+	    mem_size = &endptr != NULL ? mem_size + convert : mem_size;
 	}
 	if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0){
-	    printf("Usage: %s [OPTIONS] file\nOptions:\n%s-m, --memory: specify RAM size\n%s-h, --help: print this message\n\n",argv[0],"    ","    ");
+	    printf("Usage: %s [OPTIONS] --file filename\nOptions:\n%s-m, --memory: specify RAM size\n%s-h, --help: print this message\n\n",argv[0],"    ","    ");
 	    return 0;
 	}
+	if(strcmp(argv[i], "-f") == 0 || strcmp(argv[i], "--file") == 0){
+	    for(int j = 0; j < strlen(argv[i+1]); j++){
+		filename[j] = argv[i+1][j];
+	    }
+	}
     }
 
+    FILE *program = fopen(filename, "rb");
+    if(program == NULL){
+	printf("ERROR: file does not exist");
+	return 2;
+    }
+    long program_size = GetFileSize(program);
+    mem_size = mem_size + program_size;
+
     //Intializing memory and stuff
 
     long PC = 0; //program counter
-    char *mem_pointer = malloc(mem_size * sizeof(char)); //allocate RAM
-    if(mem_pointer == NULL){
+    char *memory = (char *)malloc(mem_size * sizeof(char)); //Allocating RAM
+    if(memory == NULL){
 	printf("ERROR: Memory allocation failed (Buy more RAM)");
-	return 2;
+	return 3;
     }
+    //Copying program to memory
+    {
+	char buffer[program_size];
+	fread(buffer, 1, program_size, program);
+	for(int i = 0; i <= program_size; i++){
+	    memory[mem_size-i] = buffer[program_size-i];
+	}
+    }
+    fclose(program);
+    //Copying ROM to memory
+    {
+	long size = GetFileSize(rom);
+	char buffer[size];
+	fread(buffer, 1, size, rom);
+	for(int i = 0; i < size; i++){
+	    memory[mem_size-program_size-1-i] = buffer[size-i];
+	}
+    }
+    fclose(rom);
 
-    free(mem_pointer);
+    DumpMemory(memory, "out.bin");
+    
+    free(memory);
     return 0;
 }