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d60d9f65 SS |
1 | /* util.c -- readline utility functions */ |
2 | ||
3 | /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of the GNU Readline Library, a library for | |
6 | reading lines of text with interactive input and history editing. | |
7 | ||
8 | The GNU Readline Library is free software; you can redistribute it | |
9 | and/or modify it under the terms of the GNU General Public License | |
10 | as published by the Free Software Foundation; either version 1, or | |
11 | (at your option) any later version. | |
12 | ||
13 | The GNU Readline Library is distributed in the hope that it will be | |
14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | The GNU General Public License is often shipped with GNU software, and | |
19 | is generally kept in a file called COPYING or LICENSE. If you do not | |
20 | have a copy of the license, write to the Free Software Foundation, | |
21 | 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
22 | #define READLINE_LIBRARY | |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | #include <fcntl.h> | |
30 | #include "posixjmp.h" | |
31 | ||
32 | #if defined (HAVE_UNISTD_H) | |
33 | # include <unistd.h> /* for _POSIX_VERSION */ | |
34 | #endif /* HAVE_UNISTD_H */ | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #include <stdio.h> | |
43 | #include <ctype.h> | |
44 | ||
45 | /* System-specific feature definitions and include files. */ | |
46 | #include "rldefs.h" | |
47 | ||
48 | #if defined (TIOCSTAT_IN_SYS_IOCTL) | |
49 | # include <sys/ioctl.h> | |
50 | #endif /* TIOCSTAT_IN_SYS_IOCTL */ | |
51 | ||
52 | /* Some standard library routines. */ | |
53 | #include "readline.h" | |
54 | ||
55 | #define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0) | |
56 | ||
57 | /* Pseudo-globals imported from readline.c */ | |
58 | extern int readline_echoing_p; | |
59 | extern procenv_t readline_top_level; | |
60 | extern int rl_line_buffer_len; | |
61 | extern Function *rl_last_func; | |
62 | ||
63 | extern int _rl_defining_kbd_macro; | |
64 | extern char *_rl_executing_macro; | |
65 | ||
66 | /* Pseudo-global functions imported from other library files. */ | |
67 | extern void _rl_pop_executing_macro (); | |
68 | extern void _rl_set_the_line (); | |
69 | extern void _rl_init_argument (); | |
70 | ||
71 | extern char *xmalloc (), *xrealloc (); | |
72 | ||
73 | /* **************************************************************** */ | |
74 | /* */ | |
75 | /* Utility Functions */ | |
76 | /* */ | |
77 | /* **************************************************************** */ | |
78 | ||
79 | /* Return 0 if C is not a member of the class of characters that belong | |
80 | in words, or 1 if it is. */ | |
81 | ||
82 | int _rl_allow_pathname_alphabetic_chars = 0; | |
83 | static char *pathname_alphabetic_chars = "/-_=~.#$"; | |
84 | ||
85 | int | |
86 | alphabetic (c) | |
87 | int c; | |
88 | { | |
89 | if (ALPHABETIC (c)) | |
90 | return (1); | |
91 | ||
92 | return (_rl_allow_pathname_alphabetic_chars && | |
93 | strchr (pathname_alphabetic_chars, c) != NULL); | |
94 | } | |
95 | ||
96 | /* How to abort things. */ | |
97 | int | |
98 | _rl_abort_internal () | |
99 | { | |
100 | ding (); | |
101 | rl_clear_message (); | |
102 | _rl_init_argument (); | |
103 | rl_pending_input = 0; | |
104 | ||
105 | _rl_defining_kbd_macro = 0; | |
106 | while (_rl_executing_macro) | |
107 | _rl_pop_executing_macro (); | |
108 | ||
109 | rl_last_func = (Function *)NULL; | |
110 | longjmp (readline_top_level, 1); | |
111 | return (0); | |
112 | } | |
113 | ||
114 | int | |
115 | rl_abort (count, key) | |
116 | int count, key; | |
117 | { | |
118 | return (_rl_abort_internal ()); | |
119 | } | |
120 | ||
121 | int | |
122 | rl_tty_status (count, key) | |
123 | int count, key; | |
124 | { | |
125 | #if defined (TIOCSTAT) | |
126 | ioctl (1, TIOCSTAT, (char *)0); | |
127 | rl_refresh_line (); | |
128 | #else | |
129 | ding (); | |
130 | #endif | |
131 | return 0; | |
132 | } | |
133 | ||
134 | /* Return a copy of the string between FROM and TO. | |
135 | FROM is inclusive, TO is not. */ | |
136 | char * | |
137 | rl_copy_text (from, to) | |
138 | int from, to; | |
139 | { | |
140 | register int length; | |
141 | char *copy; | |
142 | ||
143 | /* Fix it if the caller is confused. */ | |
144 | if (from > to) | |
145 | SWAP (from, to); | |
146 | ||
147 | length = to - from; | |
148 | copy = xmalloc (1 + length); | |
149 | strncpy (copy, rl_line_buffer + from, length); | |
150 | copy[length] = '\0'; | |
151 | return (copy); | |
152 | } | |
153 | ||
154 | /* Increase the size of RL_LINE_BUFFER until it has enough space to hold | |
155 | LEN characters. */ | |
156 | void | |
157 | rl_extend_line_buffer (len) | |
158 | int len; | |
159 | { | |
160 | while (len >= rl_line_buffer_len) | |
161 | { | |
162 | rl_line_buffer_len += DEFAULT_BUFFER_SIZE; | |
163 | rl_line_buffer = xrealloc (rl_line_buffer, rl_line_buffer_len); | |
164 | } | |
165 | ||
166 | _rl_set_the_line (); | |
167 | } | |
168 | ||
169 | ||
170 | /* A function for simple tilde expansion. */ | |
171 | int | |
172 | rl_tilde_expand (ignore, key) | |
173 | int ignore, key; | |
174 | { | |
175 | register int start, end; | |
176 | char *homedir, *temp; | |
177 | int len; | |
178 | ||
179 | end = rl_point; | |
180 | start = end - 1; | |
181 | ||
182 | if (rl_point == rl_end && rl_line_buffer[rl_point] == '~') | |
183 | { | |
184 | homedir = tilde_expand ("~"); | |
185 | _rl_replace_text (homedir, start, end); | |
186 | return (0); | |
187 | } | |
188 | else if (rl_line_buffer[start] != '~') | |
189 | { | |
190 | for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--) | |
191 | ; | |
192 | start++; | |
193 | } | |
194 | ||
195 | end = start; | |
196 | do | |
197 | end++; | |
198 | while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end); | |
199 | ||
200 | if (whitespace (rl_line_buffer[end]) || end >= rl_end) | |
201 | end--; | |
202 | ||
203 | /* If the first character of the current word is a tilde, perform | |
204 | tilde expansion and insert the result. If not a tilde, do | |
205 | nothing. */ | |
206 | if (rl_line_buffer[start] == '~') | |
207 | { | |
208 | len = end - start + 1; | |
209 | temp = xmalloc (len + 1); | |
210 | strncpy (temp, rl_line_buffer + start, len); | |
211 | temp[len] = '\0'; | |
212 | homedir = tilde_expand (temp); | |
213 | free (temp); | |
214 | ||
215 | _rl_replace_text (homedir, start, end); | |
216 | } | |
217 | ||
218 | return (0); | |
219 | } | |
220 | ||
221 | /* **************************************************************** */ | |
222 | /* */ | |
223 | /* String Utility Functions */ | |
224 | /* */ | |
225 | /* **************************************************************** */ | |
226 | ||
227 | /* Determine if s2 occurs in s1. If so, return a pointer to the | |
228 | match in s1. The compare is case insensitive. */ | |
229 | char * | |
230 | _rl_strindex (s1, s2) | |
231 | register char *s1, *s2; | |
232 | { | |
233 | register int i, l, len; | |
234 | ||
235 | for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++) | |
236 | if (_rl_strnicmp (s1 + i, s2, l) == 0) | |
237 | return (s1 + i); | |
238 | return ((char *)NULL); | |
239 | } | |
240 | ||
241 | #if !defined (HAVE_STRCASECMP) | |
242 | /* Compare at most COUNT characters from string1 to string2. Case | |
243 | doesn't matter. */ | |
244 | int | |
245 | _rl_strnicmp (string1, string2, count) | |
246 | char *string1, *string2; | |
247 | int count; | |
248 | { | |
249 | register char ch1, ch2; | |
250 | ||
251 | while (count) | |
252 | { | |
253 | ch1 = *string1++; | |
254 | ch2 = *string2++; | |
255 | if (_rl_to_upper(ch1) == _rl_to_upper(ch2)) | |
256 | count--; | |
257 | else | |
258 | break; | |
259 | } | |
260 | return (count); | |
261 | } | |
262 | ||
263 | /* strcmp (), but caseless. */ | |
264 | int | |
265 | _rl_stricmp (string1, string2) | |
266 | char *string1, *string2; | |
267 | { | |
268 | register char ch1, ch2; | |
269 | ||
270 | while (*string1 && *string2) | |
271 | { | |
272 | ch1 = *string1++; | |
273 | ch2 = *string2++; | |
274 | if (_rl_to_upper(ch1) != _rl_to_upper(ch2)) | |
275 | return (1); | |
276 | } | |
277 | return (*string1 - *string2); | |
278 | } | |
279 | #endif /* !HAVE_STRCASECMP */ | |
280 | ||
281 | /* Stupid comparison routine for qsort () ing strings. */ | |
282 | int | |
283 | _rl_qsort_string_compare (s1, s2) | |
284 | char **s1, **s2; | |
285 | { | |
286 | #if defined (HAVE_STRCOLL) | |
287 | return (strcoll (*s1, *s2)); | |
288 | #else | |
289 | int result; | |
290 | ||
291 | result = **s1 - **s2; | |
292 | if (result == 0) | |
293 | result = strcmp (*s1, *s2); | |
294 | ||
295 | return result; | |
296 | #endif | |
297 | } | |
298 | ||
299 | /* Function equivalents for the macros defined in chartypes.h. */ | |
300 | #undef _rl_uppercase_p | |
301 | int | |
302 | _rl_uppercase_p (c) | |
303 | int c; | |
304 | { | |
305 | return (isupper (c)); | |
306 | } | |
307 | ||
308 | #undef _rl_lowercase_p | |
309 | int | |
310 | _rl_lowercase_p (c) | |
311 | int c; | |
312 | { | |
313 | return (islower (c)); | |
314 | } | |
315 | ||
316 | #undef _rl_pure_alphabetic | |
317 | int | |
318 | _rl_pure_alphabetic (c) | |
319 | int c; | |
320 | { | |
321 | return (isupper (c) || islower (c)); | |
322 | } | |
323 | ||
324 | #undef _rl_digit_p | |
325 | int | |
326 | _rl_digit_p (c) | |
327 | int c; | |
328 | { | |
329 | return (isdigit (c)); | |
330 | } | |
331 | ||
332 | #undef _rl_to_lower | |
333 | int | |
334 | _rl_to_lower (c) | |
335 | int c; | |
336 | { | |
337 | return (isupper (c) ? tolower (c) : c); | |
338 | } | |
339 | ||
340 | #undef _rl_to_upper | |
341 | int | |
342 | _rl_to_upper (c) | |
343 | int c; | |
344 | { | |
345 | return (islower (c) ? toupper (c) : c); | |
346 | } | |
347 | ||
348 | #undef _rl_digit_value | |
349 | int | |
350 | _rl_digit_value (c) | |
351 | int c; | |
352 | { | |
353 | return (isdigit (c) ? c - '0' : c); | |
354 | } | |
355 | ||
356 | /* Backwards compatibility, now that savestring has been removed from | |
357 | all `public' readline header files. */ | |
358 | #undef _rl_savestring | |
359 | char * | |
360 | _rl_savestring (s) | |
361 | char *s; | |
362 | { | |
363 | return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s))); | |
364 | } |