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defs.h revision 1.2 
      1 /* $NetBSD: defs.h,v 1.2 1999/12/06 22:50:46 simonb Exp $ */
      2 
      3 /*
      4  * Copyright  1999 Alistair G. Crooks.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Alistair G. Crooks.
     17  * 4. The name of the author may not be used to endorse or promote
     18  *    products derived from this software without specific prior written
     19  *    permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     22  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     27  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     30  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     31  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 #ifndef DEFS_H_
     34 #define DEFS_H_
     35 
     36 #define NEWARRAY(type,ptr,size,action) do {				\
     37 	if ((ptr = (type *) calloc(sizeof(type), size)) == (type *) NULL) { \
     38 		warn("can't allocate %ld bytes", (long)(size * sizeof(type))); \
     39 		action;							\
     40 	}								\
     41 } while( /* CONSTCOND */ 0)
     42 
     43 #define RENEW(type,ptr,size,action) do {				\
     44 	if ((ptr = (type *) realloc(ptr, sizeof(type) * size)) == (type *) NULL) { \
     45 		warn("can't realloc %ld bytes", (long)(size * sizeof(type))); \
     46 		action;							\
     47 	}								\
     48 } while( /* CONSTCOND */ 0)
     49 
     50 #define NEW(type, ptr, action)	NEWARRAY(type, ptr, 1, action)
     51 
     52 #define FREE(ptr)	(void) free(ptr)
     53 
     54 #ifndef MIN
     55 #define MIN(a,b)	(((a) < (b)) ? (a) : (b))
     56 #endif
     57 
     58 #ifndef MAX
     59 #define MAX(a,b)	(((a) > (b)) ? (a) : (b))
     60 #endif
     61 
     62 #define STRNCPY(to, from, size)	do {					\
     63 	(void) strncpy(to, from, size);					\
     64 	to[(size) - 1] = 0;						\
     65 } while( /* CONSTCOND */ 0)
     66 
     67 #endif /* !DEFS_H_ */
     68