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ccc6cda3 JA |
1 | /* stringlib.c - Miscellaneous string functions. */ |
2 | ||
3 | /* Copyright (C) 1996 | |
4 | Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of GNU Bash, the Bourne Again SHell. | |
7 | ||
8 | Bash is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2, or (at your option) any later | |
11 | version. | |
12 | ||
13 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License along | |
19 | with Bash; see the file COPYING. If not, write to the Free Software | |
bb70624e | 20 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
ccc6cda3 JA |
21 | |
22 | #include "config.h" | |
23 | ||
24 | #include "bashtypes.h" | |
25 | ||
26 | #if defined (HAVE_UNISTD_H) | |
27 | # include <unistd.h> | |
28 | #endif | |
29 | ||
30 | #include "bashansi.h" | |
31 | #include <stdio.h> | |
32 | #include <ctype.h> | |
33 | ||
34 | #include "shell.h" | |
bb70624e JA |
35 | #include "pathexp.h" |
36 | ||
37 | #if defined (EXTENDED_GLOB) | |
38 | # include <glob/fnmatch.h> | |
39 | #endif | |
ccc6cda3 | 40 | |
ccc6cda3 JA |
41 | /* **************************************************************** */ |
42 | /* */ | |
43 | /* Functions to manage arrays of strings */ | |
44 | /* */ | |
45 | /* **************************************************************** */ | |
46 | ||
ccc6cda3 JA |
47 | /* Cons up a new array of words. The words are taken from LIST, |
48 | which is a WORD_LIST *. If COPY is true, everything is malloc'ed, | |
49 | so you should free everything in this array when you are done. | |
50 | The array is NULL terminated. If IP is non-null, it gets the | |
51 | number of words in the returned array. STARTING_INDEX says where | |
52 | to start filling in the returned array; it can be used to reserve | |
53 | space at the beginning of the array. */ | |
54 | char ** | |
55 | word_list_to_argv (list, copy, starting_index, ip) | |
56 | WORD_LIST *list; | |
57 | int copy, starting_index, *ip; | |
58 | { | |
59 | int count; | |
60 | char **array; | |
61 | ||
62 | count = list_length (list); | |
63 | array = (char **)xmalloc ((1 + count + starting_index) * sizeof (char *)); | |
64 | ||
65 | for (count = 0; count < starting_index; count++) | |
66 | array[count] = (char *)NULL; | |
67 | for (count = starting_index; list; count++, list = list->next) | |
68 | array[count] = copy ? savestring (list->word->word) : list->word->word; | |
69 | array[count] = (char *)NULL; | |
70 | ||
71 | if (ip) | |
72 | *ip = count; | |
73 | return (array); | |
74 | } | |
75 | ||
76 | /* Convert an array of strings into the form used internally by the shell. | |
77 | COPY means to copy the values in ARRAY into the returned list rather | |
78 | than allocate new storage. STARTING_INDEX says where in ARRAY to begin. */ | |
79 | WORD_LIST * | |
80 | argv_to_word_list (array, copy, starting_index) | |
81 | char **array; | |
82 | int copy, starting_index; | |
83 | { | |
84 | WORD_LIST *list; | |
85 | WORD_DESC *w; | |
86 | int i, count; | |
87 | ||
88 | if (array == 0 || array[0] == 0) | |
89 | return (WORD_LIST *)NULL; | |
90 | ||
91 | for (count = 0; array[count]; count++) | |
92 | ; | |
93 | ||
94 | for (i = starting_index, list = (WORD_LIST *)NULL; i < count; i++) | |
95 | { | |
96 | w = make_bare_word (copy ? "" : array[i]); | |
97 | if (copy) | |
98 | { | |
99 | free (w->word); | |
100 | w->word = array[i]; | |
101 | } | |
102 | list = make_word_list (w, list); | |
103 | } | |
104 | return (REVERSE_LIST(list, WORD_LIST *)); | |
105 | } | |
106 | ||
bb70624e JA |
107 | /* Find STRING in ALIST, a list of string key/int value pairs. If FLAGS |
108 | is 1, STRING is treated as a pattern and matched using fnmatch. */ | |
109 | int | |
110 | find_string_in_alist (string, alist, flags) | |
111 | char *string; | |
112 | STRING_INT_ALIST *alist; | |
113 | int flags; | |
114 | { | |
115 | register int i; | |
116 | int r; | |
117 | ||
118 | for (i = r = 0; alist[i].word; i++) | |
119 | { | |
120 | #if defined (EXTENDED_GLOB) | |
121 | if (flags) | |
28ef6c31 | 122 | r = fnmatch (alist[i].word, string, FNM_EXTMATCH) != FNM_NOMATCH; |
bb70624e JA |
123 | else |
124 | #endif | |
28ef6c31 | 125 | r = STREQ (string, alist[i].word); |
bb70624e JA |
126 | |
127 | if (r) | |
28ef6c31 | 128 | return (alist[i].token); |
bb70624e JA |
129 | } |
130 | return -1; | |
131 | } | |
132 | ||
ccc6cda3 JA |
133 | /* **************************************************************** */ |
134 | /* */ | |
135 | /* String Management Functions */ | |
136 | /* */ | |
137 | /* **************************************************************** */ | |
138 | ||
139 | /* Replace occurrences of PAT with REP in STRING. If GLOBAL is non-zero, | |
140 | replace all occurrences, otherwise replace only the first. | |
141 | This returns a new string; the caller should free it. */ | |
142 | char * | |
143 | strsub (string, pat, rep, global) | |
144 | char *string, *pat, *rep; | |
145 | int global; | |
146 | { | |
cce855bc | 147 | int patlen, replen, templen, tempsize, repl, i; |
ccc6cda3 JA |
148 | char *temp, *r; |
149 | ||
150 | patlen = strlen (pat); | |
cce855bc | 151 | replen = strlen (rep); |
ccc6cda3 JA |
152 | for (temp = (char *)NULL, i = templen = tempsize = 0, repl = 1; string[i]; ) |
153 | { | |
154 | if (repl && STREQN (string + i, pat, patlen)) | |
28ef6c31 JA |
155 | { |
156 | RESIZE_MALLOCED_BUFFER (temp, templen, replen, tempsize, (replen * 2)); | |
ccc6cda3 JA |
157 | |
158 | for (r = rep; *r; ) | |
159 | temp[templen++] = *r++; | |
160 | ||
161 | i += patlen; | |
162 | repl = global != 0; | |
28ef6c31 | 163 | } |
ccc6cda3 JA |
164 | else |
165 | { | |
166 | RESIZE_MALLOCED_BUFFER (temp, templen, 1, tempsize, 16); | |
167 | temp[templen++] = string[i++]; | |
168 | } | |
169 | } | |
170 | temp[templen] = 0; | |
171 | return (temp); | |
172 | } | |
173 | ||
bb70624e JA |
174 | /* Replace all instances of C in STRING with TEXT. TEXT may be empty or |
175 | NULL. If DO_GLOB is non-zero, we quote the replacement text for | |
176 | globbing. Backslash may be used to quote C. */ | |
177 | char * | |
178 | strcreplace (string, c, text, do_glob) | |
179 | char *string; | |
180 | int c; | |
181 | char *text; | |
182 | int do_glob; | |
183 | { | |
184 | char *ret, *p, *r, *t; | |
185 | int len, rlen, ind, tlen; | |
186 | ||
187 | len = STRLEN (text); | |
188 | rlen = len + strlen (string) + 2; | |
189 | ret = xmalloc (rlen); | |
190 | ||
191 | for (p = string, r = ret; p && *p; ) | |
192 | { | |
193 | if (*p == c) | |
194 | { | |
195 | if (len) | |
196 | { | |
197 | ind = r - ret; | |
198 | if (do_glob && (glob_pattern_p (text) || strchr (text, '\\'))) | |
199 | { | |
200 | t = quote_globbing_chars (text); | |
201 | tlen = strlen (t); | |
202 | RESIZE_MALLOCED_BUFFER (ret, ind, tlen, rlen, rlen); | |
203 | r = ret + ind; /* in case reallocated */ | |
204 | strcpy (r, t); | |
205 | r += tlen; | |
206 | free (t); | |
207 | } | |
208 | else | |
209 | { | |
210 | RESIZE_MALLOCED_BUFFER (ret, ind, len, rlen, rlen); | |
211 | r = ret + ind; /* in case reallocated */ | |
212 | strcpy (r, text); | |
213 | r += len; | |
214 | } | |
215 | } | |
216 | p++; | |
217 | continue; | |
218 | } | |
219 | ||
28ef6c31 | 220 | if (*p == '\\' && p[1] == c) |
bb70624e JA |
221 | p++; |
222 | ||
28ef6c31 JA |
223 | RESIZE_MALLOCED_BUFFER (ret, ind, 2, rlen, rlen); |
224 | r = ret + ind; /* in case reallocated */ | |
bb70624e JA |
225 | *r++ = *p++; |
226 | } | |
227 | *r = '\0'; | |
228 | ||
229 | return ret; | |
230 | } | |
231 | ||
d166f048 | 232 | #ifdef INCLUDE_UNUSED |
ccc6cda3 JA |
233 | /* Remove all leading whitespace from STRING. This includes |
234 | newlines. STRING should be terminated with a zero. */ | |
235 | void | |
236 | strip_leading (string) | |
237 | char *string; | |
238 | { | |
239 | char *start = string; | |
240 | ||
241 | while (*string && (whitespace (*string) || *string == '\n')) | |
242 | string++; | |
243 | ||
244 | if (string != start) | |
245 | { | |
246 | int len = strlen (string); | |
247 | FASTCOPY (string, start, len); | |
248 | start[len] = '\0'; | |
249 | } | |
250 | } | |
d166f048 | 251 | #endif |
ccc6cda3 JA |
252 | |
253 | /* Remove all trailing whitespace from STRING. This includes | |
254 | newlines. If NEWLINES_ONLY is non-zero, only trailing newlines | |
255 | are removed. STRING should be terminated with a zero. */ | |
256 | void | |
d166f048 | 257 | strip_trailing (string, len, newlines_only) |
ccc6cda3 | 258 | char *string; |
d166f048 | 259 | int len; |
ccc6cda3 JA |
260 | int newlines_only; |
261 | { | |
ccc6cda3 JA |
262 | while (len >= 0) |
263 | { | |
264 | if ((newlines_only && string[len] == '\n') || | |
28ef6c31 JA |
265 | (!newlines_only && whitespace (string[len]))) |
266 | len--; | |
ccc6cda3 | 267 | else |
28ef6c31 | 268 | break; |
ccc6cda3 JA |
269 | } |
270 | string[len + 1] = '\0'; | |
271 | } | |
272 | ||
ccc6cda3 JA |
273 | /* A wrapper for bcopy that can be prototyped in general.h */ |
274 | void | |
275 | xbcopy (s, d, n) | |
276 | char *s, *d; | |
277 | int n; | |
278 | { | |
279 | FASTCOPY (s, d, n); | |
280 | } |