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Annotation of kernel/driverkit/KernStringList.m, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * A List object for C-strings.
        !            27:  *
        !            28:  * Its sole purpose is to make whitespace-separated lists of words
        !            29:  * easier to deal with, since we use them a lot in driverkit string tables.
        !            30:  *
        !            31:  *
        !            32:  */
        !            33: 
        !            34: #import "KernStringList.h"
        !            35: 
        !            36: #define isspace(c) (((c) == ' ') || ((c) == '\t') || ((c) == '\n'))
        !            37: 
        !            38: static void *my_malloc(unsigned len)
        !            39: {
        !            40: #if KERNEL
        !            41:     extern void *IOMalloc(int);
        !            42:     return IOMalloc(len);
        !            43: #else
        !            44:     extern void *malloc(unsigned);
        !            45:     void *ptr = malloc(len);
        !            46:     char *p = (char *)ptr;
        !            47:     
        !            48:     while (len--)
        !            49:        *p++ = 'X';
        !            50:     return ptr;
        !            51: #endif
        !            52: }
        !            53: 
        !            54: static void my_free(void *ptr, unsigned len)
        !            55: {
        !            56: #if KERNEL
        !            57:     extern void IOFree(void *, int);
        !            58:     IOFree(ptr, len);
        !            59: #else
        !            60:     extern void free(void *);
        !            61:     free(ptr);
        !            62: #endif
        !            63: }
        !            64: 
        !            65: @implementation KernStringList
        !            66: 
        !            67: - init
        !            68: {
        !            69:     return [self initWithWhitespaceDelimitedString:NULL];
        !            70: }
        !            71: 
        !            72: 
        !            73: - initWithWhitespaceDelimitedString:(const char *)str
        !            74: {
        !            75:     char *sp;
        !            76:     int index;
        !            77:     unsigned len;
        !            78:     extern int strncpy(char *,const char *, int);
        !            79:     
        !            80:     [super init];
        !            81: 
        !            82:     while (*str && isspace(*str))
        !            83:        str++;
        !            84: 
        !            85:     sp = (char *)str;
        !            86:     while (*sp) {
        !            87:        while (*sp && isspace(*sp))
        !            88:            sp++;
        !            89:        if (*sp)
        !            90:            count++;
        !            91:        while (*sp && !isspace(*sp))
        !            92:            sp++;
        !            93:     }
        !            94:     
        !            95:     strings = (char **)my_malloc(sizeof(char *) * count);
        !            96: 
        !            97:     for (index = 0; str && *str; index++) {
        !            98:        char *s;
        !            99:        
        !           100:        for (sp = (char *)str; *sp && !isspace(*sp); sp++)
        !           101:            continue;
        !           102:        len = sp - str + 1;
        !           103:        s = strings[index] = (char *)my_malloc(len);
        !           104:        strncpy(s, str, len - 1);
        !           105:        s[len - 1] = '\0';
        !           106:        for (str = sp; *str && isspace(*str); str++)
        !           107:            continue;
        !           108:     }
        !           109:     return self;
        !           110: }
        !           111: 
        !           112: - free
        !           113: {
        !           114:     int i;
        !           115:     
        !           116:     for (i=0; i<count; i++) {
        !           117:        my_free((char *)strings[i], strlen(strings[i])+1);
        !           118:     }
        !           119:     my_free(strings, sizeof(char *) * count);
        !           120:     return [super free];
        !           121: }
        !           122: 
        !           123: - (unsigned)count
        !           124: {
        !           125:     return count;
        !           126: }
        !           127: 
        !           128: - (const char *)stringAt:(unsigned)index
        !           129: {
        !           130:     if (index >= 0 && index < count)
        !           131:        return strings[index];
        !           132:     return NULL;
        !           133: }
        !           134: 
        !           135: - (const char *)lastString
        !           136: {
        !           137:     return strings[count - 1];
        !           138: }
        !           139: 
        !           140: 
        !           141: @end

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