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/*
Unix SMB / CIFS implementation .
SMB parameters and setup
Copyright ( C ) Andrew Tridgell 1992 - 1999
Copyright ( C ) John H Terpstra 1996 - 1999
Copyright ( C ) Luke Kenneth Casson Leighton 1996 - 1999
Copyright ( C ) Paul Ashton 1998 - 1999
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 2 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 , write to the Free Software
Foundation , Inc . , 675 Mass Ave , Cambridge , MA 0213 9 , USA .
*/
# ifndef _SMB_MACROS_H
# define _SMB_MACROS_H
/* zero a structure */
# define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))
/* zero a structure given a pointer to the structure */
# define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
/* zero a structure given a pointer to the structure - no zero check */
# define ZERO_STRUCTPN(x) memset((char *)(x), 0, sizeof(*(x)))
/* pointer difference macro */
# define PTR_DIFF(p1,p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
/* work out how many elements there are in a static array */
# define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
/* assert macros */
# define SMB_ASSERT(b) do { if (!(b)) { \
DEBUG ( 0 , ( " PANIC: assert failed at %s(%d) \n " , __FILE__ , __LINE__ ) ) ; \
smb_panic ( " assert failed " ) ; } } while ( 0 )
# define smb_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|(PVAL(buf,1)<<16))
# define _smb_setlen(buf,len) do {(buf)[0] = 0; (buf)[1] = ((len)&0x10000)>>16; \
( buf ) [ 2 ] = ( ( len ) & 0xFF00 ) > > 8 ; ( buf ) [ 3 ] = ( len ) & 0xFF ; } while ( 0 )
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# ifndef MIN
# define MIN(a,b) ((a)<(b)?(a):(b))
# endif
# ifndef MAX
# define MAX(a,b) ((a)>(b)?(a):(b))
# endif
# ifndef ABS
# define ABS(a) ((a)>0?(a):(-(a)))
# endif
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# ifndef SAFE_FREE /* Oh no this is also defined in tdb.h */
/**
* Free memory if the pointer and zero the pointer .
*
* @ note You are explicitly allowed to pass NULL pointers - - they will
* always be ignored .
* */
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# define SAFE_FREE(x) do { if ((x) != NULL) {free(discard_const_p(void *, (x))); (x)=NULL;} } while(0)
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# endif
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# define malloc_p(type) (type *)malloc(sizeof(type))
# define malloc_array_p(type, count) (type *)realloc_array(NULL, sizeof(type), count)
# define realloc_p(p, type, count) (type *)realloc_array(p, sizeof(type), count)
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# endif /* _SMB_MACROS_H */