Fix floating point handling: When converting double to size_t,

properly round to the nearest M (=0.001m), which is the smallest
available unit.

This avoids weirdness like (size_t)(0.6 * 10.0) == 5
by instead calculating (size_t)(0.6 * 10.0 + 0.0005) == 6,
and so it fixes the indentation of the readline(3) manual.

diff --git a/usr.bin/mandoc/term.c b/usr.bin/mandoc/term.c
index fc8743e..8a27aea 100644 (file)
--- a/usr.bin/mandoc/term.c
+++ b/usr.bin/mandoc/term.c
@@ -1,4 +1,4 @@
-/*     $Id: term.c,v 1.86 2014/08/08 16:00:23 schwarze Exp $ */
+/*     $Id: term.c,v 1.87 2014/08/08 16:02:55 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -789,7 +789,7 @@ term_vspan(const struct termp *p, const struct roffsu *su)
 
        if (r < 0.0)
                r = 0.0;
-       return((size_t)r);
+       return((size_t)(r + 0.0005));
 }
 
 size_t
@@ -800,5 +800,5 @@ term_hspan(const struct termp *p, const struct roffsu *su)
        v = (*p->hspan)(p, su);
        if (v < 0.0)
                v = 0.0;
-       return((size_t)v);
+       return((size_t)(v + 0.0005));
 }