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1 | /* pcomplib.c - library functions for programmable completion. */ | |
2 | ||
3 | /* Copyright (C) 1999-2009 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
7 | Bash is free software: you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | ||
23 | #if defined (PROGRAMMABLE_COMPLETION) | |
24 | ||
25 | #include "bashansi.h" | |
26 | #include <stdio.h> | |
27 | ||
28 | #if defined (HAVE_UNISTD_H) | |
29 | # ifdef _MINIX | |
30 | # include <sys/types.h> | |
31 | # endif | |
32 | # include <unistd.h> | |
33 | #endif | |
34 | ||
35 | #include "bashintl.h" | |
36 | ||
37 | #include "shell.h" | |
38 | #include "pcomplete.h" | |
39 | ||
40 | #define COMPLETE_HASH_BUCKETS 128 /* must be power of two */ | |
41 | ||
42 | #define STRDUP(x) ((x) ? savestring (x) : (char *)NULL) | |
43 | ||
44 | HASH_TABLE *prog_completes = (HASH_TABLE *)NULL; | |
45 | ||
46 | static void free_progcomp __P((PTR_T)); | |
47 | ||
48 | COMPSPEC * | |
49 | compspec_create () | |
50 | { | |
51 | COMPSPEC *ret; | |
52 | ||
53 | ret = (COMPSPEC *)xmalloc (sizeof (COMPSPEC)); | |
54 | ret->refcount = 0; | |
55 | ||
56 | ret->actions = (unsigned long)0; | |
57 | ret->options = (unsigned long)0; | |
58 | ||
59 | ret->globpat = (char *)NULL; | |
60 | ret->words = (char *)NULL; | |
61 | ret->prefix = (char *)NULL; | |
62 | ret->suffix = (char *)NULL; | |
63 | ret->funcname = (char *)NULL; | |
64 | ret->command = (char *)NULL; | |
65 | ret->lcommand = (char *)NULL; | |
66 | ret->filterpat = (char *)NULL; | |
67 | ||
68 | return ret; | |
69 | } | |
70 | ||
71 | void | |
72 | compspec_dispose (cs) | |
73 | COMPSPEC *cs; | |
74 | { | |
75 | cs->refcount--; | |
76 | if (cs->refcount == 0) | |
77 | { | |
78 | FREE (cs->globpat); | |
79 | FREE (cs->words); | |
80 | FREE (cs->prefix); | |
81 | FREE (cs->suffix); | |
82 | FREE (cs->funcname); | |
83 | FREE (cs->command); | |
84 | FREE (cs->lcommand); | |
85 | FREE (cs->filterpat); | |
86 | ||
87 | free (cs); | |
88 | } | |
89 | } | |
90 | ||
91 | COMPSPEC * | |
92 | compspec_copy (cs) | |
93 | COMPSPEC *cs; | |
94 | { | |
95 | COMPSPEC *new; | |
96 | ||
97 | new = (COMPSPEC *)xmalloc (sizeof (COMPSPEC)); | |
98 | ||
99 | new->refcount = cs->refcount; | |
100 | new->actions = cs->actions; | |
101 | new->options = cs->options; | |
102 | ||
103 | new->globpat = STRDUP (cs->globpat); | |
104 | new->words = STRDUP (cs->words); | |
105 | new->prefix = STRDUP (cs->prefix); | |
106 | new->suffix = STRDUP (cs->suffix); | |
107 | new->funcname = STRDUP (cs->funcname); | |
108 | new->command = STRDUP (cs->command); | |
109 | new->lcommand = STRDUP (cs->lcommand); | |
110 | new->filterpat = STRDUP (cs->filterpat); | |
111 | ||
112 | return new; | |
113 | } | |
114 | ||
115 | void | |
116 | progcomp_create () | |
117 | { | |
118 | if (prog_completes == 0) | |
119 | prog_completes = hash_create (COMPLETE_HASH_BUCKETS); | |
120 | } | |
121 | ||
122 | int | |
123 | progcomp_size () | |
124 | { | |
125 | return (HASH_ENTRIES (prog_completes)); | |
126 | } | |
127 | ||
128 | static void | |
129 | free_progcomp (data) | |
130 | PTR_T data; | |
131 | { | |
132 | COMPSPEC *cs; | |
133 | ||
134 | cs = (COMPSPEC *)data; | |
135 | compspec_dispose (cs); | |
136 | } | |
137 | ||
138 | void | |
139 | progcomp_flush () | |
140 | { | |
141 | if (prog_completes) | |
142 | hash_flush (prog_completes, free_progcomp); | |
143 | } | |
144 | ||
145 | void | |
146 | progcomp_dispose () | |
147 | { | |
148 | if (prog_completes) | |
149 | hash_dispose (prog_completes); | |
150 | prog_completes = (HASH_TABLE *)NULL; | |
151 | } | |
152 | ||
153 | int | |
154 | progcomp_remove (cmd) | |
155 | char *cmd; | |
156 | { | |
157 | register BUCKET_CONTENTS *item; | |
158 | ||
159 | if (prog_completes == 0) | |
160 | return 1; | |
161 | ||
162 | item = hash_remove (cmd, prog_completes, 0); | |
163 | if (item) | |
164 | { | |
165 | if (item->data) | |
166 | free_progcomp (item->data); | |
167 | free (item->key); | |
168 | free (item); | |
169 | return (1); | |
170 | } | |
171 | return (0); | |
172 | } | |
173 | ||
174 | int | |
175 | progcomp_insert (cmd, cs) | |
176 | char *cmd; | |
177 | COMPSPEC *cs; | |
178 | { | |
179 | register BUCKET_CONTENTS *item; | |
180 | ||
181 | if (cs == NULL) | |
182 | programming_error (_("progcomp_insert: %s: NULL COMPSPEC"), cmd); | |
183 | ||
184 | if (prog_completes == 0) | |
185 | progcomp_create (); | |
186 | ||
187 | cs->refcount++; | |
188 | item = hash_insert (cmd, prog_completes, 0); | |
189 | if (item->data) | |
190 | free_progcomp (item->data); | |
191 | else | |
192 | item->key = savestring (cmd); | |
193 | item->data = cs; | |
194 | ||
195 | return 1; | |
196 | } | |
197 | ||
198 | COMPSPEC * | |
199 | progcomp_search (cmd) | |
200 | const char *cmd; | |
201 | { | |
202 | register BUCKET_CONTENTS *item; | |
203 | COMPSPEC *cs; | |
204 | ||
205 | if (prog_completes == 0) | |
206 | return ((COMPSPEC *)NULL); | |
207 | ||
208 | item = hash_search (cmd, prog_completes, 0); | |
209 | ||
210 | if (item == NULL) | |
211 | return ((COMPSPEC *)NULL); | |
212 | ||
213 | cs = (COMPSPEC *)item->data; | |
214 | ||
215 | return (cs); | |
216 | } | |
217 | ||
218 | void | |
219 | progcomp_walk (pfunc) | |
220 | hash_wfunc *pfunc; | |
221 | { | |
222 | if (prog_completes == 0 || pfunc == 0 || HASH_ENTRIES (prog_completes) == 0) | |
223 | return; | |
224 | ||
225 | hash_walk (prog_completes, pfunc); | |
226 | } | |
227 | ||
228 | #endif /* PROGRAMMABLE_COMPLETION */ |