Mercurial > gnulib
view tests/test-calloc-gnu.c @ 40244:c39a0edd90d7
fts: minor simplification
* lib/fts.c (fts_safe_changedir): Remove redundant assignment.
author | Paul Eggert <eggert@cs.ucla.edu> |
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date | Sun, 17 Mar 2019 12:39:50 -0700 |
parents | b06060465f09 |
children |
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/* Test of calloc function. Copyright (C) 2010-2019 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> #include <stdlib.h> /* Return 8. Usual compilers are not able to infer something about the return value. */ static unsigned int eight (void) { unsigned int x = rand (); unsigned int y = x * x * x * x; x++; y |= x * x * x * x; x++; y |= x * x * x * x; x++; y |= x * x * x * x; y = y >> 1; return y & -y; } int main () { /* Check that calloc (0, 0) is not a NULL pointer. */ void *p = calloc (0, 0); if (p == NULL) return 1; free (p); /* Check that calloc fails when requested to allocate a block of memory larger than SIZE_MAX bytes. We use eight (), not 8, to avoid a compiler warning from GCC 7. */ p = calloc ((size_t) -1 / 8 + 1, eight ()); if (p != NULL) { free (p); return 1; } return 0; }