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rf_utils.c revision 1.6 
      1 /*	$NetBSD: rf_utils.c,v 1.6 2001/07/18 06:45:34 thorpej 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 
     36 #include "rf_threadstuff.h"
     37 
     38 #include <sys/time.h>
     39 
     40 #include "rf_utils.h"
     41 #include "rf_debugMem.h"
     42 #include "rf_alloclist.h"
     43 #include "rf_general.h"
     44 
     45 /* creates & zeros 2-d array with b rows and k columns (MCH) */
     46 RF_RowCol_t **
     47 rf_make_2d_array(b, k, allocList)
     48 	int     b;
     49 	int     k;
     50 	RF_AllocListElem_t *allocList;
     51 {
     52 	RF_RowCol_t **retval, i;
     53 
     54 	RF_MallocAndAdd(retval, b * sizeof(RF_RowCol_t *), (RF_RowCol_t **), allocList);
     55 	for (i = 0; i < b; i++) {
     56 		RF_MallocAndAdd(retval[i], k * sizeof(RF_RowCol_t), (RF_RowCol_t *), allocList);
     57 		(void) memset((char *) retval[i], 0, k * sizeof(RF_RowCol_t));
     58 	}
     59 	return (retval);
     60 }
     61 
     62 void
     63 rf_free_2d_array(a, b, k)
     64 	RF_RowCol_t **a;
     65 	int     b;
     66 	int     k;
     67 {
     68 	RF_RowCol_t i;
     69 
     70 	for (i = 0; i < b; i++)
     71 		RF_Free(a[i], k * sizeof(RF_RowCol_t));
     72 	RF_Free(a, b * sizeof(RF_RowCol_t));
     73 }
     74 
     75 
     76 /* creates & zeros a 1-d array with c columns */
     77 RF_RowCol_t *
     78 rf_make_1d_array(c, allocList)
     79 	int     c;
     80 	RF_AllocListElem_t *allocList;
     81 {
     82 	RF_RowCol_t *retval;
     83 
     84 	RF_MallocAndAdd(retval, c * sizeof(RF_RowCol_t), (RF_RowCol_t *), allocList);
     85 	(void) memset((char *) retval, 0, c * sizeof(RF_RowCol_t));
     86 	return (retval);
     87 }
     88 
     89 void
     90 rf_free_1d_array(a, n)
     91 	RF_RowCol_t *a;
     92 	int     n;
     93 {
     94 	RF_Free(a, n * sizeof(RF_RowCol_t));
     95 }
     96 /* Euclid's algorithm:  finds and returns the greatest common divisor
     97  * between a and b.     (MCH)
     98  */
     99 int
    100 rf_gcd(m, n)
    101 	int     m;
    102 	int     n;
    103 {
    104 	int     t;
    105 
    106 	while (m > 0) {
    107 		t = n % m;
    108 		n = m;
    109 		m = t;
    110 	}
    111 	return (n);
    112 }
    113 /* these convert between text and integer.  Apparently the regular C macros
    114  * for doing this are not available in the kernel
    115  */
    116 
    117 #define ISDIGIT(x)   ( (x) >= '0' && (x) <= '9' )
    118 #define ISHEXCHAR(x) ( ((x) >= 'a' && (x) <= 'f') || ((x) >= 'A' && (x) <= 'F') )
    119 #define ISHEX(x)     ( ISDIGIT(x) || ISHEXCHAR(x) )
    120 #define HC2INT(x)    ( ((x) >= 'a' && (x) <= 'f') ? (x) - 'a' + 10 :                    \
    121 		       ( ((x) >= 'A' && (x) <= 'F') ? (x) - 'A' + 10 : (x - '0') ) )
    122 
    123 int
    124 rf_atoi(p)
    125 	char   *p;
    126 {
    127 	int     val = 0, negate = 0;
    128 
    129 	if (*p == '-') {
    130 		negate = 1;
    131 		p++;
    132 	}
    133 	for (; ISDIGIT(*p); p++)
    134 		val = 10 * val + (*p - '0');
    135 	return ((negate) ? -val : val);
    136 }
    137 
    138 int
    139 rf_htoi(p)
    140 	char   *p;
    141 {
    142 	int     val = 0;
    143 	for (; ISHEXCHAR(*p); p++)
    144 		val = 16 * val + HC2INT(*p);
    145 	return (val);
    146 }
    147