ref: f596580cba7c5b7bae84ee7cd83d2b2a438a1e9b
dir: /sys/src/libdraw/badrect.c/
#include <u.h> #include <libc.h> #include <draw.h> /* * check for zero, negative size or insanely huge rectangle. */ int badrect(Rectangle r) { int x, y; uint z; x = Dx(r); y = Dy(r); if(x > 0 && y > 0){ z = x*y; if(z/x == y && z < 0x10000000) return 0; } return 1; }