2 * Copyright (c) 2016, Olivier MATZ <zer0@droids-corp.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the University of California, Berkeley nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #define _GNU_SOURCE /* for asprintf */
33 #include <readline/readline.h>
34 #include <readline/history.h>
36 #include <ecoli_node.h>
37 #include <ecoli_parsed.h>
38 #include <ecoli_completed.h>
39 #include <ecoli_keyval.h>
40 #include <ecoli_node_str.h>
41 #include <ecoli_node_seq.h>
42 #include <ecoli_node_space.h>
43 #include <ecoli_node_or.h>
44 #include <ecoli_node_sh_lex.h>
45 #include <ecoli_node_int.h>
46 #include <ecoli_node_option.h>
47 #include <ecoli_node_cmd.h>
48 #include <ecoli_node_many.h>
49 #include <ecoli_node_once.h>
51 static struct ec_node *commands;
53 static char *my_completion_entry(const char *s, int state)
55 static struct ec_completed *c;
56 static struct ec_completed_iter *iter;
57 static const struct ec_completed_elt *elt;
66 line = strdup(rl_line_buffer);
69 line[rl_point] = '\0';
71 c = ec_node_complete(commands, line);
76 ec_completed_iter_free(iter);
77 iter = ec_completed_iter(c, EC_MATCH);
82 elt = ec_completed_iter_next(iter);
86 if (asprintf(&out_string, "%s%s", s, elt->add) < 0)
92 static char **my_attempted_completion(const char *text, int start, int end)
97 /* remove default file completion */
98 rl_attempted_completion_over = 1;
100 return rl_completion_matches(text, my_completion_entry);
103 /* this function builds the help string */
104 static char *get_node_help(const struct ec_completed_elt *elt)
106 const struct ec_node *node;
108 const char *node_help = NULL;
109 const char *node_desc = NULL;
112 for (i = 0; i < elt->pathlen; i++) {
114 if (node_help == NULL)
115 node_help = ec_keyval_get(ec_node_attrs(node), "help");
116 if (node_desc == NULL)
117 node_desc = ec_node_desc(node);
120 if (node_help == NULL)
122 if (node_desc == NULL)
125 if (asprintf(&help, "%-20s %s", node_desc, node_help) < 0)
131 static int show_help(int ignore, int invoking_key)
133 const struct ec_completed_elt *elt;
134 struct ec_completed_iter *iter;
135 struct ec_completed *c;
138 unsigned int count, i;
145 line = strdup(rl_line_buffer);
149 /* check if the current line matches */
150 p = ec_node_parse(commands, line);
151 if (ec_parsed_matches(p))
155 /* complete at current cursor position */
156 line[rl_point] = '\0';
157 c = ec_node_complete(commands, line);
158 //ec_completed_dump(stdout, c);
163 count = ec_completed_count(c, EC_MATCH | EC_NO_MATCH);
164 helps = calloc(count + match + 1, sizeof(char *));
169 helps[1] = "<return>";
171 iter = ec_completed_iter(c, EC_MATCH | EC_NO_MATCH);
175 /* strangely, rl_display_match_list() expects first index at 1 */
176 for (i = match + 1, elt = ec_completed_iter_next(iter);
177 i < count + match + 1 && elt != NULL;
178 i++, elt = ec_completed_iter_next(iter)) {
179 helps[i] = get_node_help(elt);
182 ec_completed_free(c);
184 rl_display_match_list(helps, count + match, 1000); /* XXX 1000 */
186 rl_forced_update_display();
196 static int create_commands(void)
198 struct ec_node *cmdlist = NULL, *cmd = NULL;
200 cmdlist = ec_node("or", NULL);
205 cmd = EC_NODE_SEQ(NULL,
206 ec_node_str(NULL, "hello"),
208 ec_node_str("john", "john"),
209 ec_node_str(NULL, "johnny"),
210 ec_node_str(NULL, "mike")
212 ec_node_option(NULL, ec_node_int("int", 0, 10, 10))
216 ec_keyval_set(ec_node_attrs(cmd), "help",
217 "say hello to someone several times", NULL);
218 ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "john")),
219 "help", "specific help for john", NULL);
220 ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "name")),
221 "help", "the name of the person", NULL);
222 ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "int")),
223 "help", "an integer", NULL);
224 if (ec_node_or_add(cmdlist, cmd) < 0)
228 cmd = EC_NODE_CMD(NULL, "good morning name [count]",
229 EC_NODE_CMD("name", "bob|bobby|michael"),
230 ec_node_int("count", 0, 10, 10));
233 ec_keyval_set(ec_node_attrs(cmd), "help",
234 "say good morning to someone several times", NULL);
235 ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "name")), "help",
236 "the person to greet", NULL);
237 ec_keyval_set(ec_node_attrs(ec_node_find(cmd, "count")), "help",
238 "how many times to greet", NULL);
239 if (ec_node_or_add(cmdlist, cmd) < 0)
243 cmd = EC_NODE_CMD(NULL,
244 "buy potatoes,carrots,pumpkins");
247 ec_keyval_set(ec_node_attrs(cmd), "help",
248 "buy some vegetables", NULL);
249 if (ec_node_or_add(cmdlist, cmd) < 0)
253 cmd = EC_NODE_CMD(NULL, "eat vegetables",
254 ec_node_many("vegetables",
256 ec_node_str(NULL, "potatoes"),
258 ec_node_str(NULL, "carrots")),
260 ec_node_str(NULL, "pumpkins"))),
264 ec_keyval_set(ec_node_attrs(cmd), "help",
265 "eat vegetables (take some more potatoes)", NULL);
266 if (ec_node_or_add(cmdlist, cmd) < 0)
270 cmd = EC_NODE_SEQ(NULL,
271 ec_node_str(NULL, "bye")
273 ec_keyval_set(ec_node_attrs(cmd), "help", "say bye", NULL);
274 if (ec_node_or_add(cmdlist, cmd) < 0)
278 commands = ec_node_sh_lex(NULL, cmdlist);
279 if (commands == NULL)
285 fprintf(stderr, "cannot initialize nodes\n");
286 ec_node_free(cmdlist);
297 if (create_commands() < 0)
300 rl_bind_key('?', show_help);
301 rl_attempted_completion_function = my_attempted_completion;
304 line = readline("> ");
308 p = ec_node_parse(commands, line);
309 ec_parsed_dump(stdout, p);
315 ec_node_free(commands);