Mercurial > vim
view runtime/macros/maze/mazeclean.c @ 10658:77d66e9ac0ab v8.0.0219
patch 8.0.0219: ubsan reports errors for overflow
commit https://github.com/vim/vim/commit/7a40ea2138102545848ea86a361f1b8dec7552b5
Author: Bram Moolenaar <Bram@vim.org>
Date: Sun Jan 22 18:34:57 2017 +0100
patch 8.0.0219: ubsan reports errors for overflow
Problem: Ubsan reports errors for integer overflow.
Solution: Define macros for minimum and maximum values. Select an
expression based on the value. (Mike Williams)
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sun, 22 Jan 2017 18:45:04 +0100 |
parents | 3fc0f57ecb91 |
children |
line wrap: on
line source
/* * Cleaned-up version of the maze program. * Doesn't look as nice, but should work with all C compilers. * Sascha Wilde, October 2003 */ #include <stdio.h> #include <stdlib.h> char *M, A, Z, E = 40, line[80], T[3]; int main (C) { for (M = line + E, *line = A = scanf ("%d", &C); --E; line[E] = M[E] = E) printf ("._"); for (; (A -= Z = !Z) || (printf ("\n|"), A = 39, C--); Z || printf (T)) T[Z] = Z[A - (E = A[line - Z]) && !C & A == M[A] | RAND_MAX/3 < rand () || !C & !Z ? line[M[E] = M[A]] = E, line[M[A] = A - Z] = A, "_." : " |"]; return 0; }