11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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***/
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#include <stdint.h>
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#include <string.h>
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#include "alloc-util.h"
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#include "macro.h"
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#include "util.h"
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void* memdup(const void *p, size_t l) {
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void *ret;
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assert(l == 0 || p);
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ret = malloc(l);
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if (!ret)
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return NULL;
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memcpy(ret, p, l);
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return ret;
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}
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void* memdup_suffix0(const void *p, size_t l) {
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void *ret;
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assert(l == 0 || p);
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/* The same as memdup() but place a safety NUL byte after the allocated memory */
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ret = malloc(l + 1);
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if (!ret)
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return NULL;
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*((uint8_t*) mempcpy(ret, p, l)) = 0;
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return ret;
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}
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void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) {
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size_t a, newalloc;
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void *q;
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assert(p);
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assert(allocated);
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if (*allocated >= need)
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return *p;
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newalloc = MAX(need * 2, 64u / size);
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a = newalloc * size;
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/* check for overflows */
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if (a < size * need)
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return NULL;
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q = realloc(*p, a);
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if (!q)
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return NULL;
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*p = q;
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*allocated = newalloc;
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return q;
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}
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void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) {
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size_t prev;
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uint8_t *q;
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assert(p);
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assert(allocated);
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prev = *allocated;
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q = greedy_realloc(p, allocated, need, size);
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if (!q)
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return NULL;
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if (*allocated > prev)
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memzero(q + prev * size, (*allocated - prev) * size);
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return q;
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}
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