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Annotation of sys/dev/raidframe/rf_utils.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: rf_utils.c,v 1.5 2002/12/16 07:01:05 tdeval Exp $     */
        !             2: /*     $NetBSD: rf_utils.c,v 1.5 2000/01/07 03:41:03 oster Exp $       */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1995 Carnegie-Mellon University.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Author: Mark Holland
        !             9:  *
        !            10:  * Permission to use, copy, modify and distribute this software and
        !            11:  * its documentation is hereby granted, provided that both the copyright
        !            12:  * notice and this permission notice appear in all copies of the
        !            13:  * software, derivative works or modified versions, and any portions
        !            14:  * thereof, and that both notices appear in supporting documentation.
        !            15:  *
        !            16:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            17:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
        !            18:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            19:  *
        !            20:  * Carnegie Mellon requests users of this software to return to
        !            21:  *
        !            22:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
        !            23:  *  School of Computer Science
        !            24:  *  Carnegie Mellon University
        !            25:  *  Pittsburgh PA 15213-3890
        !            26:  *
        !            27:  * any improvements or extensions that they make and grant Carnegie the
        !            28:  * rights to redistribute these changes.
        !            29:  */
        !            30:
        !            31: /******************************************
        !            32:  *
        !            33:  * rf_utils.c -- Various support routines.
        !            34:  *
        !            35:  ******************************************/
        !            36:
        !            37:
        !            38: #include "rf_threadstuff.h"
        !            39:
        !            40: #include <sys/time.h>
        !            41:
        !            42: #include "rf_utils.h"
        !            43: #include "rf_debugMem.h"
        !            44: #include "rf_alloclist.h"
        !            45: #include "rf_general.h"
        !            46:
        !            47: /* Creates & zeros 2-d array with b rows and k columns. (MCH) */
        !            48: RF_RowCol_t **
        !            49: rf_make_2d_array(int b, int k, RF_AllocListElem_t *allocList)
        !            50: {
        !            51:        RF_RowCol_t **retval, i;
        !            52:
        !            53:        RF_MallocAndAdd(retval, b * sizeof(RF_RowCol_t *), (RF_RowCol_t **),
        !            54:            allocList);
        !            55:        for (i = 0; i < b; i++) {
        !            56:                RF_MallocAndAdd(retval[i], k * sizeof(RF_RowCol_t),
        !            57:                    (RF_RowCol_t *), allocList);
        !            58:                bzero((char *) retval[i], k * sizeof(RF_RowCol_t));
        !            59:        }
        !            60:        return (retval);
        !            61: }
        !            62:
        !            63: void
        !            64: rf_free_2d_array(RF_RowCol_t **a, int b, int k)
        !            65: {
        !            66:        RF_RowCol_t i;
        !            67:
        !            68:        for (i = 0; i < b; i++)
        !            69:                RF_Free(a[i], k * sizeof(RF_RowCol_t));
        !            70:        RF_Free(a, b * sizeof(RF_RowCol_t));
        !            71: }
        !            72:
        !            73: /* Creates & zeroes a 1-d array with c columns. */
        !            74: RF_RowCol_t *
        !            75: rf_make_1d_array(int c, RF_AllocListElem_t *allocList)
        !            76: {
        !            77:        RF_RowCol_t *retval;
        !            78:
        !            79:        RF_MallocAndAdd(retval, c * sizeof(RF_RowCol_t), (RF_RowCol_t *),
        !            80:            allocList);
        !            81:        bzero((char *) retval, c * sizeof(RF_RowCol_t));
        !            82:        return (retval);
        !            83: }
        !            84:
        !            85: void
        !            86: rf_free_1d_array(RF_RowCol_t *a, int n)
        !            87: {
        !            88:        RF_Free(a, n * sizeof(RF_RowCol_t));
        !            89: }
        !            90:
        !            91: /*
        !            92:  * Euclid's algorithm: Finds and returns the greatest common divisor
        !            93:  * between a and b. (MCH)
        !            94:  */
        !            95: int
        !            96: rf_gcd(int m, int n)
        !            97: {
        !            98:        int t;
        !            99:
        !           100:        while (m > 0) {
        !           101:                t = n % m;
        !           102:                n = m;
        !           103:                m = t;
        !           104:        }
        !           105:        return (n);
        !           106: }
        !           107:
        !           108: /*
        !           109:  * These convert between text and integer. Apparently the regular C macros
        !           110:  * for doing this are not available in the kernel.
        !           111:  */
        !           112:
        !           113: #define        ISDIGIT(x)      ((x) >= '0' && (x) <= '9')
        !           114: #define        ISHEXCHAR(x)    (((x) >= 'a' && (x) <= 'f') ||                  \
        !           115:                         ((x) >= 'A' && (x) <= 'F'))
        !           116: #define        ISHEX(x)        (ISDIGIT(x) || ISHEXCHAR(x))
        !           117: #define        HC2INT(x)       (((x) >= 'a' && (x) <= 'f') ?                   \
        !           118:                         (x) - 'a' + 10 :                               \
        !           119:                         (((x) >= 'A' && (x) <= 'F') ?                  \
        !           120:                           (x) - 'A' + 10 : (x - '0')))
        !           121:
        !           122: int
        !           123: rf_atoi(char *p)
        !           124: {
        !           125:        int val = 0, negate = 0;
        !           126:
        !           127:        if (*p == '-') {
        !           128:                negate = 1;
        !           129:                p++;
        !           130:        }
        !           131:        for (; ISDIGIT(*p); p++)
        !           132:                val = 10 * val + (*p - '0');
        !           133:        return ((negate) ? -val : val);
        !           134: }
        !           135:
        !           136: int
        !           137: rf_htoi(char *p)
        !           138: {
        !           139:        int val = 0;
        !           140:        for (; ISHEXCHAR(*p); p++)
        !           141:                val = 16 * val + HC2INT(*p);
        !           142:        return (val);
        !           143: }