/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include "alloc-util.h" #include "util.h" void* memdup(const void *p, size_t l) { void *r; assert(p); r = malloc(l); if (!r) return NULL; memcpy(r, p, l); return r; } void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) { size_t a, newalloc; void *q; assert(p); assert(allocated); if (*allocated >= need) return *p; newalloc = MAX(need * 2, 64u / size); a = newalloc * size; /* check for overflows */ if (a < size * need) return NULL; q = realloc(*p, a); if (!q) return NULL; *p = q; *allocated = newalloc; return q; } void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) { size_t prev; uint8_t *q; assert(p); assert(allocated); prev = *allocated; q = greedy_realloc(p, allocated, need, size); if (!q) return NULL; if (*allocated > prev) memzero(q + prev * size, (*allocated - prev) * size); return q; }