-if (!buffer && !(buffer = (char*) malloc(size))) return NULL;
-if (!(buffer = getcwd(buffer, size))) return NULL;
-return realloc(buffer, strlen(buffer) + 1);
+if (!buffer && !(buffer = US malloc(size))) return NULL;
+if (!(buffer = getcwd(CS buffer, size))) return NULL;
+return realloc(CS buffer, strlen(buffer) + 1);