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fb40c209 | 1 | /* MI Command Set - MI parser. |
349c5d5f | 2 | |
4c38e0a4 | 3 | Copyright (C) 2000, 2001, 2002, 2007, 2008, 2009, 2010 |
0fb0cc75 | 4 | Free Software Foundation, Inc. |
349c5d5f | 5 | |
ab91fdd5 | 6 | Contributed by Cygnus Solutions (a Red Hat company). |
fb40c209 AC |
7 | |
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
fb40c209 AC |
13 | (at your option) any later version. |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
fb40c209 AC |
22 | |
23 | #include "defs.h" | |
24 | #include "mi-cmds.h" | |
25 | #include "mi-parse.h" | |
f870a310 | 26 | #include "charset.h" |
fb40c209 AC |
27 | |
28 | #include <ctype.h> | |
27b82ed2 | 29 | #include "gdb_string.h" |
fb40c209 | 30 | |
f870a310 TT |
31 | /* Like parse_escape, but leave the results as a host char, not a |
32 | target char. */ | |
33 | ||
34 | static int | |
35 | mi_parse_escape (char **string_ptr) | |
36 | { | |
37 | int c = *(*string_ptr)++; | |
38 | switch (c) | |
39 | { | |
40 | case '\n': | |
41 | return -2; | |
42 | case 0: | |
43 | (*string_ptr)--; | |
44 | return 0; | |
45 | ||
46 | case '0': | |
47 | case '1': | |
48 | case '2': | |
49 | case '3': | |
50 | case '4': | |
51 | case '5': | |
52 | case '6': | |
53 | case '7': | |
54 | { | |
55 | int i = host_hex_value (c); | |
56 | int count = 0; | |
57 | while (++count < 3) | |
58 | { | |
59 | c = (**string_ptr); | |
60 | if (isdigit (c) && c != '8' && c != '9') | |
61 | { | |
62 | (*string_ptr)++; | |
63 | i *= 8; | |
64 | i += host_hex_value (c); | |
65 | } | |
66 | else | |
67 | { | |
68 | break; | |
69 | } | |
70 | } | |
71 | return i; | |
72 | } | |
73 | ||
74 | case 'a': | |
75 | c = '\a'; | |
76 | break; | |
77 | case 'b': | |
78 | c = '\b'; | |
79 | break; | |
80 | case 'f': | |
81 | c = '\f'; | |
82 | break; | |
83 | case 'n': | |
84 | c = '\n'; | |
85 | break; | |
86 | case 'r': | |
87 | c = '\r'; | |
88 | break; | |
89 | case 't': | |
90 | c = '\t'; | |
91 | break; | |
92 | case 'v': | |
93 | c = '\v'; | |
94 | break; | |
95 | ||
96 | default: | |
97 | break; | |
98 | } | |
99 | ||
100 | return c; | |
101 | } | |
102 | ||
fb40c209 AC |
103 | static void |
104 | mi_parse_argv (char *args, struct mi_parse *parse) | |
105 | { | |
106 | char *chp = args; | |
107 | int argc = 0; | |
108 | char **argv = xmalloc ((argc + 1) * sizeof (char *)); | |
109 | argv[argc] = NULL; | |
110 | while (1) | |
111 | { | |
112 | char *arg; | |
113 | /* skip leading white space */ | |
114 | while (isspace (*chp)) | |
115 | chp++; | |
116 | /* Three possibilities: EOF, quoted string, or other text. */ | |
117 | switch (*chp) | |
118 | { | |
119 | case '\0': | |
120 | parse->argv = argv; | |
121 | parse->argc = argc; | |
122 | return; | |
123 | case '"': | |
124 | { | |
125 | /* A quoted string. */ | |
126 | int len; | |
127 | char *start = chp + 1; | |
128 | /* Determine the buffer size. */ | |
129 | chp = start; | |
130 | len = 0; | |
131 | while (*chp != '\0' && *chp != '"') | |
132 | { | |
133 | if (*chp == '\\') | |
134 | { | |
135 | chp++; | |
f870a310 | 136 | if (mi_parse_escape (&chp) <= 0) |
fb40c209 AC |
137 | { |
138 | /* Do not allow split lines or "\000" */ | |
139 | freeargv (argv); | |
140 | return; | |
141 | } | |
142 | } | |
143 | else | |
144 | chp++; | |
145 | len++; | |
146 | } | |
147 | /* Insist on a closing quote. */ | |
148 | if (*chp != '"') | |
149 | { | |
150 | freeargv (argv); | |
151 | return; | |
152 | } | |
153 | /* Insist on trailing white space. */ | |
154 | if (chp[1] != '\0' && !isspace (chp[1])) | |
155 | { | |
156 | freeargv (argv); | |
157 | return; | |
158 | } | |
159 | /* create the buffer. */ | |
160 | arg = xmalloc ((len + 1) * sizeof (char)); | |
161 | /* And copy the characters in. */ | |
162 | chp = start; | |
163 | len = 0; | |
164 | while (*chp != '\0' && *chp != '"') | |
165 | { | |
166 | if (*chp == '\\') | |
167 | { | |
168 | chp++; | |
f870a310 | 169 | arg[len] = mi_parse_escape (&chp); |
fb40c209 AC |
170 | } |
171 | else | |
172 | arg[len] = *chp++; | |
173 | len++; | |
174 | } | |
175 | arg[len] = '\0'; | |
176 | chp++; /* that closing quote. */ | |
177 | break; | |
178 | } | |
179 | default: | |
180 | { | |
181 | /* An unquoted string. Accumulate all non blank | |
182 | characters into a buffer. */ | |
183 | int len; | |
184 | char *start = chp; | |
185 | while (*chp != '\0' && !isspace (*chp)) | |
186 | { | |
187 | chp++; | |
188 | } | |
189 | len = chp - start; | |
190 | arg = xmalloc ((len + 1) * sizeof (char)); | |
191 | strncpy (arg, start, len); | |
192 | arg[len] = '\0'; | |
193 | break; | |
194 | } | |
195 | } | |
196 | /* Append arg to argv. */ | |
197 | argv = xrealloc (argv, (argc + 2) * sizeof (char *)); | |
198 | argv[argc++] = arg; | |
199 | argv[argc] = NULL; | |
200 | } | |
201 | } | |
202 | ||
203 | ||
204 | void | |
205 | mi_parse_free (struct mi_parse *parse) | |
206 | { | |
207 | if (parse == NULL) | |
208 | return; | |
209 | if (parse->command != NULL) | |
b8c9b27d | 210 | xfree (parse->command); |
fb40c209 | 211 | if (parse->token != NULL) |
b8c9b27d | 212 | xfree (parse->token); |
fb40c209 | 213 | if (parse->args != NULL) |
b8c9b27d | 214 | xfree (parse->args); |
fb40c209 AC |
215 | if (parse->argv != NULL) |
216 | freeargv (parse->argv); | |
b8c9b27d | 217 | xfree (parse); |
fb40c209 AC |
218 | } |
219 | ||
220 | ||
221 | struct mi_parse * | |
222 | mi_parse (char *cmd) | |
223 | { | |
224 | char *chp; | |
225 | struct mi_parse *parse = XMALLOC (struct mi_parse); | |
226 | memset (parse, 0, sizeof (*parse)); | |
a79b8f6e VP |
227 | parse->all = 0; |
228 | parse->thread_group = -1; | |
1e92afda VP |
229 | parse->thread = -1; |
230 | parse->frame = -1; | |
fb40c209 AC |
231 | |
232 | /* Before starting, skip leading white space. */ | |
233 | while (isspace (*cmd)) | |
234 | cmd++; | |
235 | ||
236 | /* Find/skip any token and then extract it. */ | |
237 | for (chp = cmd; *chp >= '0' && *chp <= '9'; chp++) | |
238 | ; | |
239 | parse->token = xmalloc ((chp - cmd + 1) * sizeof (char *)); | |
240 | memcpy (parse->token, cmd, (chp - cmd)); | |
241 | parse->token[chp - cmd] = '\0'; | |
242 | ||
243 | /* This wasn't a real MI command. Return it as a CLI_COMMAND. */ | |
244 | if (*chp != '-') | |
245 | { | |
246 | while (isspace (*chp)) | |
247 | chp++; | |
248 | parse->command = xstrdup (chp); | |
249 | parse->op = CLI_COMMAND; | |
250 | return parse; | |
251 | } | |
252 | ||
253 | /* Extract the command. */ | |
254 | { | |
255 | char *tmp = chp + 1; /* discard ``-'' */ | |
256 | for (; *chp && !isspace (*chp); chp++) | |
257 | ; | |
258 | parse->command = xmalloc ((chp - tmp + 1) * sizeof (char *)); | |
259 | memcpy (parse->command, tmp, chp - tmp); | |
260 | parse->command[chp - tmp] = '\0'; | |
261 | } | |
262 | ||
263 | /* Find the command in the MI table. */ | |
264 | parse->cmd = mi_lookup (parse->command); | |
265 | if (parse->cmd == NULL) | |
266 | { | |
267 | /* FIXME: This should be a function call. */ | |
268 | fprintf_unfiltered | |
269 | (raw_stdout, | |
270 | "%s^error,msg=\"Undefined MI command: %s\"\n", | |
271 | parse->token, parse->command); | |
272 | mi_parse_free (parse); | |
273 | return NULL; | |
274 | } | |
275 | ||
276 | /* Skip white space following the command. */ | |
277 | while (isspace (*chp)) | |
278 | chp++; | |
279 | ||
1e92afda VP |
280 | /* Parse the --thread and --frame options, if present. At present, |
281 | some important commands, like '-break-*' are implemented by forwarding | |
282 | to the CLI layer directly. We want to parse --thread and --frame | |
283 | here, so as not to leave those option in the string that will be passed | |
284 | to CLI. */ | |
285 | for (;;) | |
286 | { | |
287 | char *start = chp; | |
a79b8f6e VP |
288 | size_t as = sizeof ("--all ") - 1; |
289 | size_t tgs = sizeof ("--thread-group ") - 1; | |
1e92afda VP |
290 | size_t ts = sizeof ("--thread ") - 1; |
291 | size_t fs = sizeof ("--frame ") - 1; | |
a79b8f6e VP |
292 | if (strncmp (chp, "--all ", as) == 0) |
293 | { | |
294 | parse->all = 1; | |
295 | chp += as; | |
296 | } | |
297 | /* See if --all is the last token in the input. */ | |
298 | if (strcmp (chp, "--all") == 0) | |
299 | { | |
300 | parse->all = 1; | |
301 | chp += strlen (chp); | |
302 | } | |
303 | if (strncmp (chp, "--thread-group ", tgs) == 0) | |
304 | { | |
305 | if (parse->thread_group != -1) | |
306 | error (_("Duplicate '--thread-group' option")); | |
307 | chp += tgs; | |
308 | if (*chp != 'i') | |
309 | error (_("Invalid thread group id")); | |
310 | chp += 1; | |
311 | parse->thread_group = strtol (chp, &chp, 10); | |
312 | } | |
1e92afda VP |
313 | if (strncmp (chp, "--thread ", ts) == 0) |
314 | { | |
315 | if (parse->thread != -1) | |
a79b8f6e | 316 | error (_("Duplicate '--thread' option")); |
1e92afda VP |
317 | chp += ts; |
318 | parse->thread = strtol (chp, &chp, 10); | |
319 | } | |
320 | else if (strncmp (chp, "--frame ", fs) == 0) | |
321 | { | |
322 | if (parse->frame != -1) | |
a79b8f6e | 323 | error (_("Duplicate '--frame' option")); |
1e92afda VP |
324 | chp += fs; |
325 | parse->frame = strtol (chp, &chp, 10); | |
326 | } | |
327 | else | |
328 | break; | |
329 | ||
330 | if (*chp != '\0' && !isspace (*chp)) | |
a79b8f6e | 331 | error (_("Invalid value for the '%s' option"), |
1e92afda VP |
332 | start[2] == 't' ? "--thread" : "--frame"); |
333 | while (isspace (*chp)) | |
334 | chp++; | |
335 | } | |
336 | ||
fb40c209 AC |
337 | /* For new argv commands, attempt to return the parsed argument |
338 | list. */ | |
339 | if (parse->cmd->argv_func != NULL) | |
340 | { | |
341 | mi_parse_argv (chp, parse); | |
342 | if (parse->argv == NULL) | |
343 | { | |
344 | /* FIXME: This should be a function call. */ | |
345 | fprintf_unfiltered | |
346 | (raw_stdout, | |
347 | "%s^error,msg=\"Problem parsing arguments: %s %s\"\n", | |
348 | parse->token, parse->command, chp); | |
349 | mi_parse_free (parse); | |
350 | return NULL; | |
351 | } | |
352 | } | |
353 | ||
354 | /* FIXME: DELETE THIS */ | |
9e22b03a | 355 | /* For CLI commands, also return the remainder of the |
fb40c209 | 356 | command line as a single string. */ |
9e22b03a VP |
357 | if (parse->cmd->cli.cmd != NULL) |
358 | parse->args = xstrdup (chp); | |
fb40c209 AC |
359 | |
360 | /* Fully parsed. */ | |
361 | parse->op = MI_COMMAND; | |
362 | return parse; | |
363 | } |