It's too much for an inlined function, I think.
/* Buffer primitives for comparison operations.
Copyright (C) 1993, 1995, 1998, 2001, 2002 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
...
/* Least common multiple of two buffer sizes A and B. However, if
either A or B is zero, or if the multiple is greater than LCM_MAX,
return a reasonable buffer size. */
size_t
buffer_lcm (size_t a, size_t b, size_t lcm_max)
{
size_t lcm, m, n, q, r;
/* Yield reasonable values if buffer sizes are zero. */
if (!a)
return b ? b : 8 * 1024;
if (!b)
return a;
/* n = gcd (a, b) */
for (m = a, n = b; (r = m % n) != 0; m = n, n = r)
continue;
/* Yield a if there is an overflow. */
q = a / n;
lcm = q * b;
return lcm <= lcm_max && lcm / b == q ? lcm : a;
}
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