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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * String manipulation functions.
38 * libcfs/libcfs/libcfs_string.c
40 * Author: Nathan Rutman <nathan.rutman@sun.com>
44 # define EXPORT_SYMTAB
47 #include <libcfs/libcfs.h>
49 /* non-0 = don't match */
50 static int cfs_strncasecmp(const char *s1, const char *s2, size_t n)
52 if (s1 == NULL || s2 == NULL)
58 while (n-- != 0 && tolower(*s1) == tolower(*s2)) {
59 if (n == 0 || *s1 == '\0' || *s2 == '\0')
65 return tolower(*(unsigned char *)s1) - tolower(*(unsigned char *)s2);
68 /* Convert a text string to a bitmask */
69 int cfs_str2mask(const char *str, const char *(*bit2str)(int bit),
70 int *oldmask, int minmask, int allmask)
74 int newmask = minmask, i, len, found = 0;
77 /* <str> must be a list of tokens separated by whitespace
78 * and optionally an operator ('+' or '-'). If an operator
79 * appears first in <str>, '*oldmask' is used as the starting point
80 * (relative), otherwise minmask is used (absolute). An operator
81 * applies to all following tokens up to the next operator. */
87 if (*str == '+' || *str == '-') {
90 /* only if first token is relative */
94 if (*str == 0) /* trailing op */
98 /* find token length */
99 for (len = 0; str[len] != 0 && !isspace(str[len]) &&
100 str[len] != '+' && str[len] != '-'; len++);
104 for (i = 0; i < 32; i++) {
105 debugstr = bit2str(i);
106 if (debugstr != NULL &&
107 strlen(debugstr) == len &&
108 cfs_strncasecmp(str, debugstr, len) == 0) {
110 newmask &= ~(1 << i);
117 if (!found && len == 3 &&
118 (cfs_strncasecmp(str, "ALL", len) == 0)) {
126 CWARN("unknown mask '%.*s'.\n"
127 "mask usage: [+|-]<all|type> ...\n", len, str);
136 EXPORT_SYMBOL(cfs_str2mask);
138 /* Duplicate a string in a platform-independent way */
139 char *cfs_strdup(const char *str, u_int32_t flags)
141 size_t lenz; /* length of str + zero byte */
144 lenz = strlen(str) + 1;
146 dup_str = cfs_alloc(lenz, flags);
150 memcpy(dup_str, str, lenz);
154 EXPORT_SYMBOL(cfs_strdup);
157 * cfs_{v}snprintf() return the actual size that is printed rather than
158 * the size that would be printed in standard functions.
161 int cfs_vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
166 i = vsnprintf(buf, size, fmt, args);
168 return (i >= size ? size - 1 : i);
170 EXPORT_SYMBOL(cfs_vsnprintf);
173 int cfs_snprintf(char *buf, size_t size, const char *fmt, ...)
179 i = cfs_vsnprintf(buf, size, fmt, args);
184 EXPORT_SYMBOL(cfs_snprintf);
186 /* get the first string out of @str */
187 char *cfs_firststr(char *str, size_t size)
192 /* trim leading spaces */
193 while (i < size && *str && isspace(*str)) {
198 /* string with all spaces */
203 while (i < size && *end != '\0' && !isspace(*end)) {
212 EXPORT_SYMBOL(cfs_firststr);