opensolaris_string.c revision 168404
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 29#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9') 30 31#define IS_ALPHA(c) \ 32 (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z')) 33 34char * 35strchr(const char *s, int c) 36{ 37 char ch; 38 39 ch = c; 40 for (;; ++s) { 41 if (*s == ch) 42 return ((char *)s); 43 if (*s == '\0') 44 return (NULL); 45 } 46 /* NOTREACHED */ 47} 48 49char * 50strrchr(const char *s, int c) 51{ 52 char *save; 53 char ch; 54 55 ch = c; 56 for (save = NULL;; ++s) { 57 if (*s == ch) 58 save = (char *)s; 59 if (*s == '\0') 60 return (save); 61 } 62 /* NOTREACHED */ 63} 64 65char * 66strpbrk(const char *s, const char *b) 67{ 68 const char *p; 69 70 do { 71 for (p = b; *p != '\0' && *p != *s; ++p) 72 ; 73 if (*p != '\0') 74 return ((char *)s); 75 } while (*s++); 76 77 return (NULL); 78} 79 80/* 81 * Convert a string into a valid C identifier by replacing invalid 82 * characters with '_'. Also makes sure the string is nul-terminated 83 * and takes up at most n bytes. 84 */ 85void 86strident_canon(char *s, size_t n) 87{ 88 char c; 89 char *end = s + n - 1; 90 91 if ((c = *s) == 0) 92 return; 93 94 if (!IS_ALPHA(c) && c != '_') 95 *s = '_'; 96 97 while (s < end && ((c = *(++s)) != 0)) { 98 if (!IS_ALPHA(c) && !IS_DIGIT(c) && c != '_') 99 *s = '_'; 100 } 101 *s = 0; 102} 103