-/* Learn from "file" the largest line length (pointed to by "linemax_p") and
- * (pointed to by "n_lines_p" if it is not set to NULL) the number of lines.
- *
- * Returns 0 on success, 1 on fseek() error.
+/* Return 16-bit number pseudo-randomly generated via Linear Congruential
+ * Generator algorithm with some proven constants. Use instead of rand() to
+ * ensure portability of the same pseudo-randomness across systems.
+ */
+extern uint16_t rrand();
+
+/* Wrappers to malloc(), calloc() from function called "f" calling exit_err()
+ * with trouble_msg() error message if necessary.