162 lines
3.6 KiB
C
162 lines
3.6 KiB
C
//
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// ZoneMinder Memory Utilities, $Date$, $Revision$
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// Copyright (C) 2001-2008 Philip Coombes
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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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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//
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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, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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#ifndef ZM_MEM_UTILS_H
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#define ZM_MEM_UTILS_H
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#include <stdlib.h>
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#include "zm.h"
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inline void* zm_mallocaligned(unsigned int reqalignment, size_t reqsize) {
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uint8_t* retptr;
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#if HAVE_POSIX_MEMALIGN
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if(posix_memalign((void**)&retptr,reqalignment,reqsize) != 0)
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return NULL;
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return retptr;
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#else
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uint8_t* alloc;
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retptr = (uint8_t*)malloc(reqsize+reqalignment+sizeof(void*));
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if(retptr == NULL)
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return NULL;
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alloc = retptr + sizeof(void*);
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if(((long)alloc % reqalignment) != 0)
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alloc = alloc + (reqalignment - ((long)alloc % reqalignment));
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/* Store a pointer before to the start of the block, just before returned aligned memory */
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*(void**)(alloc - sizeof(void*)) = retptr;
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return alloc;
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#endif
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}
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inline void zm_freealigned(void* ptr) {
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#if HAVE_POSIX_MEMALIGN
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free(ptr);
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#else
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/* Start of block is stored before the block if it was allocated by zm_mallocaligned */
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free(*(void**)((uint8_t*)ptr - sizeof(void*)));
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#endif
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}
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inline char *mempbrk( register const char *s, const char *accept, size_t limit )
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{
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if ( limit <= 0 || !s || !accept || !*accept )
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return( 0 );
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register unsigned int i,j;
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size_t acc_len = strlen( accept );
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for ( i = 0; i < limit; s++, i++ )
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{
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for ( j = 0; j < acc_len; j++ )
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{
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if ( *s == accept[j] )
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{
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return( (char *)s );
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}
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}
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}
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return( 0 );
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}
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inline char *memstr( register const char *s, const char *n, size_t limit )
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{
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if ( limit <= 0 || !s || !n )
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return( 0 );
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if ( !*n )
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return( (char *)s );
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register unsigned int i,j,k;
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size_t n_len = strlen( n );
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for ( i = 0; i < limit; i++, s++ )
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{
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if ( *s != *n )
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continue;
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j = 1;
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k = 1;
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while ( true )
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{
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if ( k >= n_len )
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return( (char *)s );
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if ( s[j++] != n[k++] )
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break;
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}
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}
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return( 0 );
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}
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inline size_t memspn( register const char *s, const char *accept, size_t limit )
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{
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if ( limit <= 0 || !s || !accept || !*accept )
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return( 0 );
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register unsigned int i,j;
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size_t acc_len = strlen( accept );
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for ( i = 0; i < limit; s++, i++ )
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{
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register bool found = false;
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for ( j = 0; j < acc_len; j++ )
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{
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if ( *s == accept[j] )
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{
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found = true;
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break;
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}
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}
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if ( !found )
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{
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return( i );
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}
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}
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return( limit );
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}
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inline size_t memcspn( register const char *s, const char *reject, size_t limit )
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{
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if ( limit <= 0 || !s || !reject )
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return( 0 );
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if ( !*reject )
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return( limit );
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register unsigned int i,j;
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size_t rej_len = strlen( reject );
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for ( i = 0; i < limit; s++, i++ )
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{
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for ( j = 0; j < rej_len; j++ )
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{
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if ( *s == reject[j] )
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{
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return( i );
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}
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}
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}
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return( limit );
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}
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#endif // ZM_MEM_UTILS_H
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