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rf_utils.c revision 1.5.6.3 
      1 /*	$NetBSD: rf_utils.c,v 1.5.6.3 2001/11/14 19:15:54 nathanw Exp $	*/
      2 /*
      3  * Copyright (c) 1995 Carnegie-Mellon University.
      4  * All rights reserved.
      5  *
      6  * Author: Mark Holland
      7  *
      8  * Permission to use, copy, modify and distribute this software and
      9  * its documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     16  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie the
     26  * rights to redistribute these changes.
     27  */
     28 
     29 /****************************************
     30  *
     31  * rf_utils.c -- various support routines
     32  *
     33  ****************************************/
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: rf_utils.c,v 1.5.6.3 2001/11/14 19:15:54 nathanw Exp $");
     37 
     38 #include "rf_threadstuff.h"
     39 
     40 #include <sys/time.h>
     41 
     42 #include "rf_archs.h"
     43 #include "rf_utils.h"
     44 #include "rf_debugMem.h"
     45 #include "rf_alloclist.h"
     46 #include "rf_general.h"
     47 
     48 /* creates & zeros 2-d array with b rows and k columns (MCH) */
     49 RF_RowCol_t **
     50 rf_make_2d_array(b, k, allocList)
     51 	int     b;
     52 	int     k;
     53 	RF_AllocListElem_t *allocList;
     54 {
     55 	RF_RowCol_t **retval, i;
     56 
     57 	RF_MallocAndAdd(retval, b * sizeof(RF_RowCol_t *), (RF_RowCol_t **), allocList);
     58 	for (i = 0; i < b; i++) {
     59 		RF_MallocAndAdd(retval[i], k * sizeof(RF_RowCol_t), (RF_RowCol_t *), allocList);
     60 		(void) memset((char *) retval[i], 0, k * sizeof(RF_RowCol_t));
     61 	}
     62 	return (retval);
     63 }
     64 
     65 void
     66 rf_free_2d_array(a, b, k)
     67 	RF_RowCol_t **a;
     68 	int     b;
     69 	int     k;
     70 {
     71 	RF_RowCol_t i;
     72 
     73 	for (i = 0; i < b; i++)
     74 		RF_Free(a[i], k * sizeof(RF_RowCol_t));
     75 	RF_Free(a, b * sizeof(RF_RowCol_t));
     76 }
     77 
     78 
     79 /* creates & zeros a 1-d array with c columns */
     80 RF_RowCol_t *
     81 rf_make_1d_array(c, allocList)
     82 	int     c;
     83 	RF_AllocListElem_t *allocList;
     84 {
     85 	RF_RowCol_t *retval;
     86 
     87 	RF_MallocAndAdd(retval, c * sizeof(RF_RowCol_t), (RF_RowCol_t *), allocList);
     88 	(void) memset((char *) retval, 0, c * sizeof(RF_RowCol_t));
     89 	return (retval);
     90 }
     91 
     92 void
     93 rf_free_1d_array(a, n)
     94 	RF_RowCol_t *a;
     95 	int     n;
     96 {
     97 	RF_Free(a, n * sizeof(RF_RowCol_t));
     98 }
     99 /* Euclid's algorithm:  finds and returns the greatest common divisor
    100  * between a and b.     (MCH)
    101  */
    102 int
    103 rf_gcd(m, n)
    104 	int     m;
    105 	int     n;
    106 {
    107 	int     t;
    108 
    109 	while (m > 0) {
    110 		t = n % m;
    111 		n = m;
    112 		m = t;
    113 	}
    114 	return (n);
    115 }
    116 /* these convert between text and integer.  Apparently the regular C macros
    117  * for doing this are not available in the kernel
    118  */
    119 
    120 #define ISDIGIT(x)   ( (x) >= '0' && (x) <= '9' )
    121 #define ISHEXCHAR(x) ( ((x) >= 'a' && (x) <= 'f') || ((x) >= 'A' && (x) <= 'F') )
    122 #define ISHEX(x)     ( ISDIGIT(x) || ISHEXCHAR(x) )
    123 #define HC2INT(x)    ( ((x) >= 'a' && (x) <= 'f') ? (x) - 'a' + 10 :                    \
    124 		       ( ((x) >= 'A' && (x) <= 'F') ? (x) - 'A' + 10 : (x - '0') ) )
    125 
    126 int
    127 rf_atoi(p)
    128 	char   *p;
    129 {
    130 	int     val = 0, negate = 0;
    131 
    132 	if (*p == '-') {
    133 		negate = 1;
    134 		p++;
    135 	}
    136 	for (; ISDIGIT(*p); p++)
    137 		val = 10 * val + (*p - '0');
    138 	return ((negate) ? -val : val);
    139 }
    140 
    141 int
    142 rf_htoi(p)
    143 	char   *p;
    144 {
    145 	int     val = 0;
    146 	for (; ISHEXCHAR(*p); p++)
    147 		val = 16 * val + HC2INT(*p);
    148 	return (val);
    149 }
    150