1 /* $NetBSD: rf_utils.c,v 1.17 2019/02/09 03:34:00 christos 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@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 1.17 2019/02/09 03:34:00 christos Exp $");
37
38 #include "rf_archs.h"
39 #include "rf_utils.h"
40 #include "rf_debugMem.h"
41 #include "rf_alloclist.h"
42
43 /* creates & zeros 2-d array with b rows and k columns (MCH) */
44 RF_RowCol_t **
rf_make_2d_array(int b,int k,RF_AllocListElem_t * allocList)45 rf_make_2d_array(int b, int k, RF_AllocListElem_t *allocList)
46 {
47 RF_RowCol_t **retval, i;
48
49 retval = RF_MallocAndAdd(b * sizeof(*retval), allocList);
50 for (i = 0; i < b; i++) {
51 retval[i] = RF_MallocAndAdd(k * sizeof(*retval[i]), allocList);
52 }
53 return (retval);
54 }
55
56 #if (RF_INCLUDE_PARITY_DECLUSTERING > 0) || (RF_INCLUDE_PARITY_DECLUSTERING_PQ > 0)
57
58 void
rf_free_2d_array(RF_RowCol_t ** a,int b,int k)59 rf_free_2d_array(RF_RowCol_t **a, int b, int k)
60 {
61 RF_RowCol_t i;
62
63 for (i = 0; i < b; i++)
64 RF_Free(a[i], k * sizeof(RF_RowCol_t));
65 RF_Free(a, b * sizeof(RF_RowCol_t));
66 }
67
68
69 /* creates & zeros a 1-d array with c columns */
70 RF_RowCol_t *
rf_make_1d_array(int c,RF_AllocListElem_t * allocList)71 rf_make_1d_array(int c, RF_AllocListElem_t *allocList)
72 {
73 RF_RowCol_t *retval;
74
75 retval = RF_MallocAndAdd(c * sizeof(*retval), allocList);
76 return (retval);
77 }
78
79 void
rf_free_1d_array(RF_RowCol_t * a,int n)80 rf_free_1d_array(RF_RowCol_t *a, int n)
81 {
82 RF_Free(a, n * sizeof(RF_RowCol_t));
83 }
84
85 /* Euclid's algorithm: finds and returns the greatest common divisor
86 * between a and b. (MCH)
87 */
88 int
rf_gcd(int m,int n)89 rf_gcd(int m, int n)
90 {
91 int t;
92
93 while (m > 0) {
94 t = n % m;
95 n = m;
96 m = t;
97 }
98 return (n);
99 }
100 #endif
101 /* these convert between text and integer. Apparently the regular C macros
102 * for doing this are not available in the kernel
103 */
104
105 #define ISDIGIT(x) ( (x) >= '0' && (x) <= '9' )
106 #define ISHEXCHAR(x) ( ((x) >= 'a' && (x) <= 'f') || ((x) >= 'A' && (x) <= 'F') )
107 #define ISHEX(x) ( ISDIGIT(x) || ISHEXCHAR(x) )
108 #define HC2INT(x) ( ((x) >= 'a' && (x) <= 'f') ? (x) - 'a' + 10 : \
109 ( ((x) >= 'A' && (x) <= 'F') ? (x) - 'A' + 10 : (x - '0') ) )
110
111 int
rf_atoi(char * p)112 rf_atoi(char *p)
113 {
114 int val = 0, negate = 0;
115
116 if (*p == '-') {
117 negate = 1;
118 p++;
119 }
120 for (; ISDIGIT(*p); p++)
121 val = 10 * val + (*p - '0');
122 return ((negate) ? -val : val);
123 }
124
125 int
rf_htoi(char * p)126 rf_htoi(char *p)
127 {
128 int val = 0;
129 for (; ISHEXCHAR(*p); p++)
130 val = 16 * val + HC2INT(*p);
131 return (val);
132 }
133