Mercurial > gnulib
view lib/imaxdiv.c @ 40190:ef116535bf1a
relocatable-prog: Use $ORIGIN trick on more platforms.
* m4/relocatable.m4 (gl_RELOCATABLE_BODY): Use $ORIGIN trick also on
FreeBSD >= 7.3, DragonFly >= 3.0, NetBSD >= 8.0, OpenBSD >= 5.4,
Solaris >= 10, Haiku. But don't use it on Android.
* build-aux/reloc-ldflags: Allow the use of the $ORIGIN trick also on
Hurd, FreeBSD, DragonFly, NetBSD, OpenBSD, Solaris, Haiku.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Wed, 20 Feb 2019 02:39:52 +0100 |
parents | b06060465f09 |
children |
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/* imaxdiv() function: division of 'intmax_t'. Copyright (C) 2006, 2009-2019 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include <inttypes.h> #include <stdlib.h> imaxdiv_t imaxdiv (intmax_t numer, intmax_t denom) { imaxdiv_t result; result.quot = numer / denom; result.rem = numer % denom; /* Verify the requirements of ISO C 99 section 6.5.5 paragraph 6: "When integers are divided, the result of the / operator is the algebraic quotient with any fractional part discarded. (This is often called "truncation toward zero".) If the quotient a/b is representable, the expression (a/b)*b + a%b shall equal a." */ if (!(denom == 0 || (INTMAX_MIN + INTMAX_MAX < 0 && denom == -1 && numer < - INTMAX_MAX))) { if (!(result.quot * denom + result.rem == numer)) /* The compiler's implementation of / and % is broken. */ abort (); if (!(numer >= 0 ? result.rem >= 0 && (denom >= 0 ? result.rem < denom : /* Don't write result.rem < - denom, as it gives integer overflow if denom == INTMAX_MIN. */ - result.rem > denom) : result.rem <= 0 && (denom >= 0 ? result.rem > - denom : result.rem > denom))) /* The compiler's implementation of / and % may be ok according to C89, but not to C99. Please report this to <bug-gnulib@ngu.org>. This might be a big portability problem. */ abort (); } return result; }