1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/param.h> 27 #include <sys/string.h> 28 #include <sys/kmem.h> 29 #include <machine/stdarg.h> 30 31 #define IS_DIGIT(c) ((c) >= '0' && (c) <= '9') 32 33 #define IS_ALPHA(c) \ 34 (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z')) 35 36 char * 37 strpbrk(const char *s, const char *b) 38 { 39 const char *p; 40 41 do { 42 for (p = b; *p != '\0' && *p != *s; ++p) 43 ; 44 if (*p != '\0') 45 return ((char *)s); 46 } while (*s++); 47 48 return (NULL); 49 } 50 51 /* 52 * Convert a string into a valid C identifier by replacing invalid 53 * characters with '_'. Also makes sure the string is nul-terminated 54 * and takes up at most n bytes. 55 */ 56 void 57 strident_canon(char *s, size_t n) 58 { 59 char c; 60 char *end = s + n - 1; 61 62 if ((c = *s) == 0) 63 return; 64 65 if (!IS_ALPHA(c) && c != '_') 66 *s = '_'; 67 68 while (s < end && ((c = *(++s)) != 0)) { 69 if (!IS_ALPHA(c) && !IS_DIGIT(c) && c != '_') 70 *s = '_'; 71 } 72 *s = 0; 73 } 74 75 /* 76 * Do not change the length of the returned string; it must be freed 77 * with strfree(). 78 */ 79 char * 80 kmem_asprintf(const char *fmt, ...) 81 { 82 int size; 83 va_list adx; 84 char *buf; 85 86 va_start(adx, fmt); 87 size = vsnprintf(NULL, 0, fmt, adx) + 1; 88 va_end(adx); 89 90 buf = kmem_alloc(size, KM_SLEEP); 91 92 va_start(adx, fmt); 93 (void) vsnprintf(buf, size, fmt, adx); 94 va_end(adx); 95 96 return (buf); 97 } 98 99 void 100 strfree(char *str) 101 { 102 ASSERT(str != NULL); 103 kmem_free(str, strlen(str) + 1); 104 } 105