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https://github.com/samba-team/samba.git
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fa29eed681
Signed-off-by: Pavel Filipenský <pfilipensky@samba.org> Reviewed-by: Andreas Schneider <asn@samba.org>
130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1999
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Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SAMBA_MEMORY_H_
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#define _SAMBA_MEMORY_H_
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#ifndef SAFE_FREE /* Oh no this is also defined in tdb.h */
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/**
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* Free memory if the pointer and zero the pointer.
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*
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* @note You are explicitly allowed to pass NULL pointers -- they will
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* always be ignored.
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**/
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#define SAFE_FREE(x) do { if ((x) != NULL) {free(x); (x)=NULL;} } while(0)
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#endif
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/**
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* Zero string and free memory if the pointer and zero the pointer.
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*
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* @note You are explicitly allowed to pass NULL pointers -- they will
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* always be ignored.
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**/
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#define BURN_FREE_STR(x) do { \
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if ((x) != NULL) { \
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size_t s = strlen(x); \
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memset_s((x), s, 0, s); \
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free(x); (x) = NULL; \
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} \
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} while(0)
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/**
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* Zero and free memory if the pointer and zero the pointer.
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*
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* @note You are explicitly allowed to pass NULL pointers -- they will
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* always be ignored.
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**/
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#define BURN_FREE(x, s) do { \
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if ((x) != NULL) { \
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memset_s((x), (s), 0, (s)); \
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free(x); (x) = NULL; \
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} \
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} while(0)
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/**
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* Type-safe version of malloc. Allocated one copy of the
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* specified data type.
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*/
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#define malloc_p(type) (type *)malloc(sizeof(type))
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/**
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* Allocate an array of elements of one data type. Does type-checking.
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*/
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#define malloc_array_p(type, count) (type *)realloc_array(NULL, sizeof(type), count, false)
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/**
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* Resize an array of elements of one data type. Does type-checking.
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*/
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#define realloc_p(p, type, count) (type *)realloc_array(p, sizeof(type), count, false)
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/**
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* Zero a structure.
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*/
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#ifndef ZERO_STRUCT
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#define ZERO_STRUCT(x) memset_s((char *)&(x), sizeof(x), 0, sizeof(x))
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#endif
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/**
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* Zero a structure given a pointer to the structure.
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*/
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#ifndef ZERO_STRUCTP
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#define ZERO_STRUCTP(x) do { \
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if ((x) != NULL) { \
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memset_s((char *)(x), sizeof(*(x)), 0, sizeof(*(x))); \
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} \
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} while(0)
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#endif
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/**
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* Zero a structure given a pointer to the structure - no zero check.
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*/
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#ifndef ZERO_STRUCTPN
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#define ZERO_STRUCTPN(x) memset_s((char *)(x), sizeof(*(x)), 0, sizeof(*(x)))
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#endif
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/**
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* Zero an array - note that sizeof(array) must work - ie. it must not be a
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* pointer.
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*/
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#ifndef ZERO_ARRAY
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#define ZERO_ARRAY(x) memset_s((char *)(x), sizeof(x), 0, sizeof(x))
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#endif
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/**
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* Zero a given len of an array
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*/
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#define ZERO_ARRAY_LEN(x, l) memset_s((char *)(x), (l), 0, (l))
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/**
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* Work out how many elements there are in a static array
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*/
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
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#endif
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/**
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* Pointer difference macro.
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*/
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#ifndef PTR_DIFF
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#define PTR_DIFF(p1,p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
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#endif
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#endif /* _SAMBA_MEMORY_H_ */
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