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726f6388 JA |
1 | /* bracecomp.c -- Complete a filename with the possible completions enclosed |
2 | in csh-style braces such that the list of completions is available to the | |
3 | shell. */ | |
4 | ||
5 | /* Original version by tromey@cns.caltech.edu, Fri Feb 7 1992. */ | |
6 | ||
3185942a | 7 | /* Copyright (C) 1993-2009 Free Software Foundation, Inc. |
726f6388 JA |
8 | |
9 | This file is part of GNU Bash, the Bourne Again SHell. | |
10 | ||
3185942a JA |
11 | Bash is free software: you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation, either version 3 of the License, or | |
14 | (at your option) any later version. | |
726f6388 | 15 | |
3185942a JA |
16 | Bash is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
726f6388 | 20 | |
3185942a JA |
21 | You should have received a copy of the GNU General Public License |
22 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
23 | */ | |
726f6388 | 24 | |
ccc6cda3 | 25 | #include "config.h" |
3185942a | 26 | |
ccc6cda3 JA |
27 | #if defined (BRACE_EXPANSION) && defined (READLINE) |
28 | ||
726f6388 JA |
29 | #include <stdio.h> |
30 | ||
ccc6cda3 | 31 | #if defined (HAVE_UNISTD_H) |
cce855bc JA |
32 | # ifdef _MINIX |
33 | # include <sys/types.h> | |
34 | # endif | |
ccc6cda3 JA |
35 | # include <unistd.h> |
36 | #endif | |
37 | ||
d166f048 | 38 | #include "bashansi.h" |
3185942a | 39 | #include "shmbutil.h" |
726f6388 JA |
40 | |
41 | #include "shell.h" | |
42 | #include <readline/readline.h> | |
43 | ||
3185942a JA |
44 | static int _strcompare __P((char **, char **)); |
45 | ||
726f6388 JA |
46 | /* Find greatest common prefix of two strings. */ |
47 | static int | |
48 | string_gcd (s1, s2) | |
49 | char *s1, *s2; | |
50 | { | |
51 | register int i; | |
52 | ||
53 | if (s1 == NULL || s2 == NULL) | |
54 | return (0); | |
55 | ||
56 | for (i = 0; *s1 && *s2; ++s1, ++s2, ++i) | |
57 | { | |
58 | if (*s1 != *s2) | |
59 | break; | |
60 | } | |
61 | ||
62 | return (i); | |
63 | } | |
64 | ||
65 | static char * | |
66 | really_munge_braces (array, real_start, real_end, gcd_zero) | |
67 | char **array; | |
68 | int real_start, real_end, gcd_zero; | |
69 | { | |
70 | int start, end, gcd; | |
e8ce775d JA |
71 | char *result, *subterm, *x; |
72 | int result_size, flag, tlen; | |
726f6388 JA |
73 | |
74 | flag = 0; | |
75 | ||
76 | if (real_start == real_end) | |
77 | { | |
ac50fbac CR |
78 | x = array[real_start] ? sh_backslash_quote (array[real_start] + gcd_zero, 0, 0) |
79 | : sh_backslash_quote (array[0], 0, 0); | |
e8ce775d | 80 | return x; |
726f6388 JA |
81 | } |
82 | ||
f73dda09 | 83 | result = (char *)xmalloc (result_size = 16); |
726f6388 JA |
84 | *result = '\0'; |
85 | ||
86 | for (start = real_start; start < real_end; start = end + 1) | |
87 | { | |
88 | gcd = strlen (array[start]); | |
89 | for (end = start + 1; end < real_end; end++) | |
90 | { | |
91 | int temp; | |
92 | ||
93 | temp = string_gcd (array[start], array[end]); | |
94 | ||
95 | if (temp <= gcd_zero) | |
96 | break; | |
97 | ||
98 | gcd = temp; | |
99 | } | |
100 | end--; | |
101 | ||
102 | if (gcd_zero == 0 && start == real_start && end != (real_end - 1)) | |
103 | { | |
104 | /* In this case, add in a leading '{', because we are at | |
105 | top level, and there isn't a consistent prefix. */ | |
106 | result_size += 1; | |
f73dda09 | 107 | result = (char *)xrealloc (result, result_size); |
d166f048 | 108 | result[0] = '{'; result[1] = '\0'; |
726f6388 JA |
109 | flag++; |
110 | } | |
111 | ||
e8ce775d JA |
112 | /* Make sure we backslash quote every substring we insert into the |
113 | resultant brace expression. This is so the default filename | |
114 | quoting function won't inappropriately quote the braces. */ | |
726f6388 | 115 | if (start == end) |
e8ce775d JA |
116 | { |
117 | x = savestring (array[start] + gcd_zero); | |
ac50fbac | 118 | subterm = sh_backslash_quote (x, 0, 0); |
e8ce775d JA |
119 | free (x); |
120 | } | |
726f6388 JA |
121 | else |
122 | { | |
123 | /* If there is more than one element in the subarray, | |
e8ce775d JA |
124 | insert the (quoted) prefix and an opening brace. */ |
125 | tlen = gcd - gcd_zero; | |
f73dda09 | 126 | x = (char *)xmalloc (tlen + 1); |
e8ce775d JA |
127 | strncpy (x, array[start] + gcd_zero, tlen); |
128 | x[tlen] = '\0'; | |
ac50fbac | 129 | subterm = sh_backslash_quote (x, 0, 0); |
e8ce775d JA |
130 | free (x); |
131 | result_size += strlen (subterm) + 1; | |
f73dda09 | 132 | result = (char *)xrealloc (result, result_size); |
e8ce775d JA |
133 | strcat (result, subterm); |
134 | free (subterm); | |
726f6388 JA |
135 | strcat (result, "{"); |
136 | subterm = really_munge_braces (array, start, end + 1, gcd); | |
137 | subterm[strlen (subterm) - 1] = '}'; | |
138 | } | |
139 | ||
140 | result_size += strlen (subterm) + 1; | |
f73dda09 | 141 | result = (char *)xrealloc (result, result_size); |
726f6388 JA |
142 | strcat (result, subterm); |
143 | strcat (result, ","); | |
144 | free (subterm); | |
145 | } | |
146 | ||
147 | if (gcd_zero == 0) | |
148 | result[strlen (result) - 1] = flag ? '}' : '\0'; | |
149 | return (result); | |
150 | } | |
151 | ||
3185942a JA |
152 | static int |
153 | _strcompare (s1, s2) | |
154 | char **s1, **s2; | |
155 | { | |
156 | int result; | |
157 | ||
158 | result = **s1 - **s2; | |
159 | if (result == 0) | |
160 | result = strcmp (*s1, *s2); | |
161 | ||
162 | return result; | |
163 | } | |
164 | ||
28ef6c31 | 165 | static int |
726f6388 JA |
166 | hack_braces_completion (names) |
167 | char **names; | |
168 | { | |
169 | register int i; | |
170 | char *temp; | |
171 | ||
3185942a JA |
172 | i = strvec_len (names); |
173 | if (MB_CUR_MAX > 1 && i > 2) | |
174 | qsort (names+1, i-1, sizeof (char *), (QSFUNC *)_strcompare); | |
175 | ||
176 | temp = really_munge_braces (names, 1, i, 0); | |
726f6388 JA |
177 | |
178 | for (i = 0; names[i]; ++i) | |
179 | { | |
180 | free (names[i]); | |
181 | names[i] = NULL; | |
182 | } | |
183 | names[0] = temp; | |
28ef6c31 | 184 | return 0; |
726f6388 JA |
185 | } |
186 | ||
e8ce775d JA |
187 | /* We handle quoting ourselves within hack_braces_completion, so we turn off |
188 | rl_filename_quoting_desired and rl_filename_quoting_function. */ | |
28ef6c31 JA |
189 | int |
190 | bash_brace_completion (count, ignore) | |
191 | int count, ignore; | |
726f6388 | 192 | { |
28ef6c31 JA |
193 | rl_compignore_func_t *orig_ignore_func; |
194 | rl_compentry_func_t *orig_entry_func; | |
195 | rl_quote_func_t *orig_quoting_func; | |
196 | rl_completion_func_t *orig_attempt_func; | |
197 | int orig_quoting_desired, r; | |
726f6388 JA |
198 | |
199 | orig_ignore_func = rl_ignore_some_completions_function; | |
200 | orig_attempt_func = rl_attempted_completion_function; | |
201 | orig_entry_func = rl_completion_entry_function; | |
e8ce775d JA |
202 | orig_quoting_func = rl_filename_quoting_function; |
203 | orig_quoting_desired = rl_filename_quoting_desired; | |
726f6388 | 204 | |
28ef6c31 JA |
205 | rl_completion_entry_function = rl_filename_completion_function; |
206 | rl_attempted_completion_function = (rl_completion_func_t *)NULL; | |
207 | rl_ignore_some_completions_function = hack_braces_completion; | |
208 | rl_filename_quoting_function = (rl_quote_func_t *)NULL; | |
e8ce775d | 209 | rl_filename_quoting_desired = 0; |
726f6388 | 210 | |
28ef6c31 | 211 | r = rl_complete_internal (TAB); |
726f6388 JA |
212 | |
213 | rl_ignore_some_completions_function = orig_ignore_func; | |
214 | rl_attempted_completion_function = orig_attempt_func; | |
215 | rl_completion_entry_function = orig_entry_func; | |
e8ce775d JA |
216 | rl_filename_quoting_function = orig_quoting_func; |
217 | rl_filename_quoting_desired = orig_quoting_desired; | |
28ef6c31 JA |
218 | |
219 | return r; | |
726f6388 | 220 | } |
ccc6cda3 | 221 | #endif /* BRACE_EXPANSION && READLINE */ |