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 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <stdio.h> 30 #include <ctype.h> 31 32 #define TK_INIT 0 33 #define TK_TOKEN 1 34 #define TK_SKIPWHITE 2 35 #define TK_QUOTED 3 36 37 /* 38 * assumes quoted strings are delimited by white space (i.e sp 39 * "string" sp). Backslash can be used to quote a quote mark. 40 * quoted strings will have the quotes stripped. 41 */ 42 43 char * 44 get_token(char *string) 45 { 46 static char *orig = NULL; 47 static char *curp; 48 char *ret; 49 int state = TK_INIT; 50 int c; 51 int quotechar; 52 53 if (string != orig || string == NULL) { 54 orig = string; 55 curp = string; 56 if (string == NULL) { 57 return (NULL); 58 } 59 } 60 ret = curp; 61 while ((c = *curp) != '\0') { 62 switch (state) { 63 case TK_SKIPWHITE: 64 case TK_INIT: 65 if (isspace(c)) { 66 while (*curp && isspace(*curp)) 67 curp++; 68 ret = curp; 69 } 70 if (c == '"' || c == '\'') { 71 state = TK_QUOTED; 72 curp++; 73 ret = curp; 74 quotechar = c; /* want to match for close */ 75 } else { 76 state = TK_TOKEN; 77 } 78 break; 79 case TK_TOKEN: 80 switch (c) { 81 case '\\': 82 curp++; 83 if (*curp) { 84 curp++; 85 break; 86 } else { 87 return (ret); 88 } 89 break; 90 default: 91 if (*curp == '\0' || isspace(c)) { 92 *curp++ = '\0'; 93 return (ret); 94 } 95 curp++; 96 break; 97 } 98 break; 99 case TK_QUOTED: 100 switch (c) { 101 case '\\': 102 curp++; 103 if (*curp) { 104 curp++; 105 break; 106 } 107 curp++; 108 break; 109 default: 110 if (c == '\0' || c == quotechar) { 111 *curp++ = '\0'; 112 return (ret); 113 } 114 curp++; 115 break; 116 } 117 break; 118 } 119 } 120 return (NULL); 121 } 122