3 * $Id: str.c,v 1.4 2000/10/08 09:43:34 mdw Exp $
5 * Functions for hacking with strings
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the mLib utilities library.
14 * mLib is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * mLib is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with mLib; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.4 2000/10/08 09:43:34 mdw
34 * New quoted string handling and simple pattern matching.
36 * Revision 1.3 1999/12/22 15:41:14 mdw
37 * Skip past trailing whitespace in str_getword.
39 * Revision 1.2 1999/05/26 20:52:57 mdw
40 * Add new `rest' argument for `str_split'.
42 * Revision 1.1 1999/05/17 20:37:01 mdw
43 * Some trivial string hacks.
47 /*----- Header files ------------------------------------------------------*/
56 /*----- Main code ---------------------------------------------------------*/
58 /* --- @str_qword@ --- *
60 * Arguments: @char **pp@ = address of pointer into string
61 * @unsigned f@ = various flags
63 * Returns: Pointer to the next space-separated possibly-quoted word from
64 * the string, or null.
66 * Use: Fetches the next word from a string. If the flag
67 * @STRF_QUOTE@ is set, the `\' character acts as an escape, and
68 * single and double quotes protect whitespace.
73 char *str_qword(char **pp, unsigned f)
75 char *p = *pp, *q, *qq;
78 /* --- Preliminaries --- */
82 while (isspace((unsigned char)*p))
89 /* --- Main work --- */
91 for (q = qq = p; *q; q++) {
107 if (isspace((unsigned char)*q)) {
108 do q++; while (*q && isspace((unsigned char)*q));
110 } else if (!(f & STRF_QUOTE))
128 /* --- Finished --- */
136 /* --- @str_qsplit@ --- *
138 * Arguments: @char *p@ = pointer to string
139 * @char *v[]@ = pointer to array to fill in
140 * @size_t c@ = count of strings to fill in
141 * @char **rest@ = where to store the remainder of the string
142 * @unsigned f@ = flags for @str_qword@
144 * Returns: Number of strings filled in.
146 * Use: Fills an array with pointers to the individual words of a
147 * string. The string is modified in place to contain zero
148 * bytes at the word boundaries, and the words have leading
149 * and trailing space stripped off. No more than @c@ words
150 * are read; the actual number is returned as the value of the
151 * function. Unused slots in the array are populated with
152 * null bytes. If there's any string left, the address of the
153 * remainder is stored in @rest@ (if it's non-null); otherwise
154 * @rest@ is set to a null pointer.
157 size_t str_qsplit(char *p, char *v[], size_t c, char **rest, unsigned f)
162 while (c && (q = str_qword(&p, f)) != 0) {
176 /* --- @str_getword@ --- *
178 * Arguments: @char **pp@ = address of pointer into string
180 * Returns: Pointer to the next space-separated word from the string,
183 * Use: Parses off space-separated words from a string. This is a
184 * compatibility veneer over @str_qword@.
187 char *str_getword(char **pp)
189 return (str_qword(pp, 0));
192 /* --- @str_split@ --- *
194 * Arguments: @char *p@ = pointer to string
195 * @char *v[]@ = pointer to array to fill in
196 * @size_t c@ = count of strings to fill in
197 * @char **rest@ = where to store the remainder of the string
199 * Returns: Number of strings filled in.
201 * Use: Fills an array with pointers to the individual words of a
202 * string. This is a compatibility veneer over @str_qsplit@.
205 size_t str_split(char *p, char *v[], size_t c, char **rest)
207 return (str_qsplit(p, v, c, rest, 0));
210 /* --- @str_match@ --- *
212 * Arguments: @const char *p@ = pointer to pattern string
213 * @const char *s@ = string to compare with
215 * Returns: Nonzero if the pattern matches the string.
217 * Use: Does simple wildcard matching. This is quite nasty and more
218 * than a little slow. Supports metacharacters `*', `?' and
222 int str_match(const char *p, const char *s)
225 char pch = *p++, pche, sch;
249 if (pch == '^' || pch == '!') {
254 if (*p == '-' && p[1] && p[1] != ']') {
257 if (pch <= sch && sch <= pche)
259 } else if (pch == sch)
263 for (;; pch = *p++) {
264 if (!pch || pch == ']')
266 if (*p == '-' && p[1] && p[1] != ']') {
269 if (pch <= sch && sch <= pche)
271 } else if (pch == sch)
283 if (*p == '-' && p[1] && p[1] != ']')
304 /* --- @str_sanitize@ --- *
306 * Arguments: @char *d@ = destination buffer
307 * @const char *p@ = pointer to source string
308 * @size_t sz@ = size of destination buffer
312 * Use: Writes a string into a buffer, being careful not to overflow
313 * the buffer, to null terminate the result, and to prevent
314 * nasty nonprintable characters ending up in the buffer.
317 void str_sanitize(char *d, const char *p, size_t sz)
324 if (!isgraph((unsigned char)ch))
332 /*----- That's all, folks -------------------------------------------------*/