installer: Make function to determine the amount of system memory.

src/install+setup/install/hw.c

@@ -315,3 +315,23 @@ struct hw_destination* hw_make_destination(int part_type, struct hw_disk** disks
 
 	return dest;
 }
+
+unsigned long long hw_memory() {
+	FILE* handle = NULL;
+	char line[STRING_SIZE];
+
+	unsigned long long memory = 0;
+
+	/* Calculate amount of memory in machine */
+	if ((handle = fopen("/proc/meminfo", "r"))) {
+		while (fgets(line, sizeof(line), handle)) {
+			if (!sscanf (line, "MemTotal: %llu kB", memory)) {
+				memory = 0;
+			}
+		}
+
+		fclose(handle);
+	}
+
+	return memory * 1024;
+}

src/install+setup/install/hw.h

@@ -77,4 +77,6 @@ void hw_free_disks(struct hw_disk** disks);
 unsigned int hw_count_disks(struct hw_disk** disks);
 struct hw_disk** hw_select_disks(struct hw_disk** disks, int* selection);
 
+unsigned long long hw_memory();
+
 #endif /* HEADER_HW_H */

src/install+setup/install/main.c

@@ -410,16 +410,7 @@ int main(int argc, char *argv[]) {
 	if (rc == 2)
 		goto EXIT;
 
-	/* Calculate amount of memory in machine */
-        if ((handle = fopen("/proc/meminfo", "r")))
-        {
-            while (fgets(line, STRING_SIZE-1, handle)) {
-                if (sscanf (line, "MemTotal: %s kB", string)) {
-                    memory = atoi(string) / 1024 ;
-                }
-            }
-            fclose(handle);
-        }
+	memory = hw_memory() / 1024 / 1024;
 
 	/* Partition, mkswp, mkfs.
 	 * before partitioning, first determine the sizes of each