146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
//
|
|
// ZoneMinder Memory Utilities, $Date$, $Revision$
|
|
// Copyright (C) 2001-2008 Philip Coombes
|
|
//
|
|
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
//
|
|
|
|
#ifndef ZM_MEM_UTILS_H
|
|
#define ZM_MEM_UTILS_H
|
|
|
|
#include <stdlib.h>
|
|
#include "zm.h"
|
|
|
|
inline void* zm_mallocaligned(unsigned int reqalignment, size_t reqsize) {
|
|
uint8_t* retptr;
|
|
#if HAVE_POSIX_MEMALIGN
|
|
if ( posix_memalign((void**)&retptr,reqalignment,reqsize) != 0 )
|
|
return NULL;
|
|
|
|
return retptr;
|
|
#else
|
|
uint8_t* alloc;
|
|
retptr = (uint8_t*)malloc(reqsize+reqalignment+sizeof(void*));
|
|
|
|
if ( retptr == NULL )
|
|
return NULL;
|
|
|
|
alloc = retptr + sizeof(void*);
|
|
|
|
if(((long)alloc % reqalignment) != 0)
|
|
alloc = alloc + (reqalignment - ((long)alloc % reqalignment));
|
|
|
|
/* Store a pointer before to the start of the block, just before returned aligned memory */
|
|
*(void**)(alloc - sizeof(void*)) = retptr;
|
|
|
|
return alloc;
|
|
#endif
|
|
}
|
|
|
|
inline void zm_freealigned(void* ptr) {
|
|
#if HAVE_POSIX_MEMALIGN
|
|
free(ptr);
|
|
#else
|
|
/* Start of block is stored before the block if it was allocated by zm_mallocaligned */
|
|
free(*(void**)((uint8_t*)ptr - sizeof(void*)));
|
|
#endif
|
|
}
|
|
|
|
inline char *mempbrk( register const char *s, const char *accept, size_t limit ) {
|
|
if ( limit == 0 || !s || !accept || !*accept )
|
|
return 0;
|
|
|
|
register unsigned int i,j;
|
|
size_t acc_len = strlen( accept );
|
|
|
|
for ( i = 0; i < limit; s++, i++ ) {
|
|
for ( j = 0; j < acc_len; j++ ) {
|
|
if ( *s == accept[j] ) {
|
|
return( (char *)s );
|
|
}
|
|
}
|
|
}
|
|
return( 0 );
|
|
}
|
|
|
|
inline char *memstr( register const char *s, const char *n, size_t limit ) {
|
|
if ( limit == 0 || !s || !n )
|
|
return( 0 );
|
|
|
|
if ( !*n )
|
|
return( (char *)s );
|
|
|
|
register unsigned int i,j,k;
|
|
size_t n_len = strlen( n );
|
|
|
|
for ( i = 0; i < limit; i++, s++ ) {
|
|
if ( *s != *n )
|
|
continue;
|
|
j = 1;
|
|
k = 1;
|
|
while ( true ) {
|
|
if ( k >= n_len )
|
|
return( (char *)s );
|
|
if ( s[j++] != n[k++] )
|
|
break;
|
|
}
|
|
}
|
|
return( 0 );
|
|
}
|
|
|
|
inline size_t memspn( register const char *s, const char *accept, size_t limit ) {
|
|
if ( limit == 0 || !s || !accept || !*accept )
|
|
return( 0 );
|
|
|
|
register unsigned int i,j;
|
|
size_t acc_len = strlen( accept );
|
|
|
|
for ( i = 0; i < limit; s++, i++ ) {
|
|
register bool found = false;
|
|
for ( j = 0; j < acc_len; j++ ) {
|
|
if ( *s == accept[j] ) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if ( !found ) {
|
|
return( i );
|
|
}
|
|
}
|
|
return( limit );
|
|
}
|
|
|
|
inline size_t memcspn( register const char *s, const char *reject, size_t limit ) {
|
|
if ( limit == 0 || !s || !reject )
|
|
return( 0 );
|
|
|
|
if ( !*reject )
|
|
return( limit );
|
|
|
|
register unsigned int i,j;
|
|
size_t rej_len = strlen( reject );
|
|
|
|
for ( i = 0; i < limit; s++, i++ ) {
|
|
for ( j = 0; j < rej_len; j++ ) {
|
|
if ( *s == reject[j] ) {
|
|
return( i );
|
|
}
|
|
}
|
|
}
|
|
return( limit );
|
|
}
|
|
|
|
#endif // ZM_MEM_UTILS_H
|