1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * String manipulation functions.
40 * libcfs/libcfs/libcfs_string.c
42 * Author: Nathan Rutman <nathan.rutman@sun.com>
46 # define EXPORT_SYMTAB
49 #include <libcfs/libcfs.h>
51 /* non-0 = don't match */
52 static int cfs_strncasecmp(const char *s1, const char *s2, size_t n)
54 if (s1 == NULL || s2 == NULL)
60 while (n-- != 0 && tolower(*s1) == tolower(*s2)) {
61 if (n == 0 || *s1 == '\0' || *s2 == '\0')
67 return tolower(*(unsigned char *)s1) - tolower(*(unsigned char *)s2);
70 /* Convert a text string to a bitmask */
71 int cfs_str2mask(const char *str, const char *(*bit2str)(int bit),
72 int *oldmask, int minmask, int allmask)
76 int newmask = minmask, i, len, found = 0;
79 /* <str> must be a list of tokens separated by whitespace
80 * and optionally an operator ('+' or '-'). If an operator
81 * appears first in <str>, '*oldmask' is used as the starting point
82 * (relative), otherwise minmask is used (absolute). An operator
83 * applies to all following tokens up to the next operator. */
89 if (*str == '+' || *str == '-') {
92 /* only if first token is relative */
96 if (*str == 0) /* trailing op */
100 /* find token length */
101 for (len = 0; str[len] != 0 && !isspace(str[len]) &&
102 str[len] != '+' && str[len] != '-'; len++);
106 for (i = 0; i < 32; i++) {
107 debugstr = bit2str(i);
108 if (debugstr != NULL &&
109 strlen(debugstr) == len &&
110 cfs_strncasecmp(str, debugstr, len) == 0) {
112 newmask &= ~(1 << i);
119 if (!found && len == 3 &&
120 (cfs_strncasecmp(str, "ALL", len) == 0)) {
128 CWARN("unknown mask '%.*s'.\n"
129 "mask usage: [+|-]<all|type> ...\n", len, str);
138 EXPORT_SYMBOL(cfs_str2mask);
140 /* Duplicate a string in a platform-independent way */
141 char *cfs_strdup(const char *str, u_int32_t flags)
143 size_t lenz; /* length of str + zero byte */
146 lenz = strlen(str) + 1;
148 dup_str = cfs_alloc(lenz, flags);
152 memcpy(dup_str, str, lenz);
156 EXPORT_SYMBOL(cfs_strdup);
159 * cfs_{v}snprintf() return the actual size that is printed rather than
160 * the size that would be printed in standard functions.
163 int cfs_vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
168 i = vsnprintf(buf, size, fmt, args);
170 return (i >= size ? size - 1 : i);
172 EXPORT_SYMBOL(cfs_vsnprintf);
175 int cfs_snprintf(char *buf, size_t size, const char *fmt, ...)
181 i = cfs_vsnprintf(buf, size, fmt, args);
186 EXPORT_SYMBOL(cfs_snprintf);
188 /* get the first string out of @str */
189 char *cfs_firststr(char *str, size_t size)
194 /* trim leading spaces */
195 while (i < size && *str && isspace(*str)) {
200 /* string with all spaces */
205 while (i < size && *end != '\0' && !isspace(*end)) {
214 EXPORT_SYMBOL(cfs_firststr);