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fb40c209 1/* MI Command Set - MI parser.
349c5d5f 2
618f726f 3 Copyright (C) 2000-2016 Free Software Foundation, Inc.
349c5d5f 4
ab91fdd5 5 Contributed by Cygnus Solutions (a Red Hat company).
fb40c209
AC
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
a9762ec7 11 the Free Software Foundation; either version 3 of the License, or
fb40c209
AC
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
a9762ec7 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
fb40c209
AC
21
22#include "defs.h"
23#include "mi-cmds.h"
24#include "mi-parse.h"
f870a310 25#include "charset.h"
fb40c209
AC
26
27#include <ctype.h>
529480d0 28#include "cli/cli-utils.h"
403cb6b1 29#include "language.h"
fb40c209 30
44d100c3
TT
31static const char mi_no_values[] = "--no-values";
32static const char mi_simple_values[] = "--simple-values";
33static const char mi_all_values[] = "--all-values";
87967e27 34
f870a310
TT
35/* Like parse_escape, but leave the results as a host char, not a
36 target char. */
37
38static int
ee047554 39mi_parse_escape (const char **string_ptr)
f870a310
TT
40{
41 int c = *(*string_ptr)++;
102040f0 42
f870a310
TT
43 switch (c)
44 {
45 case '\n':
46 return -2;
47 case 0:
48 (*string_ptr)--;
49 return 0;
50
51 case '0':
52 case '1':
53 case '2':
54 case '3':
55 case '4':
56 case '5':
57 case '6':
58 case '7':
59 {
60 int i = host_hex_value (c);
61 int count = 0;
102040f0 62
f870a310
TT
63 while (++count < 3)
64 {
65 c = (**string_ptr);
66 if (isdigit (c) && c != '8' && c != '9')
67 {
68 (*string_ptr)++;
69 i *= 8;
70 i += host_hex_value (c);
71 }
72 else
73 {
74 break;
75 }
76 }
77 return i;
78 }
79
80 case 'a':
81 c = '\a';
82 break;
83 case 'b':
84 c = '\b';
85 break;
86 case 'f':
87 c = '\f';
88 break;
89 case 'n':
90 c = '\n';
91 break;
92 case 'r':
93 c = '\r';
94 break;
95 case 't':
96 c = '\t';
97 break;
98 case 'v':
99 c = '\v';
100 break;
101
102 default:
103 break;
104 }
105
106 return c;
107}
108
fb40c209 109static void
ee047554 110mi_parse_argv (const char *args, struct mi_parse *parse)
fb40c209 111{
ee047554 112 const char *chp = args;
fb40c209 113 int argc = 0;
8d749320 114 char **argv = XNEWVEC (char *, argc + 1);
102040f0 115
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AC
116 argv[argc] = NULL;
117 while (1)
118 {
119 char *arg;
102040f0 120
2b03b41d 121 /* Skip leading white space. */
ee047554 122 chp = skip_spaces_const (chp);
fb40c209
AC
123 /* Three possibilities: EOF, quoted string, or other text. */
124 switch (*chp)
125 {
126 case '\0':
127 parse->argv = argv;
128 parse->argc = argc;
129 return;
130 case '"':
131 {
2b03b41d 132 /* A quoted string. */
fb40c209 133 int len;
ee047554 134 const char *start = chp + 1;
102040f0 135
2b03b41d 136 /* Determine the buffer size. */
fb40c209
AC
137 chp = start;
138 len = 0;
139 while (*chp != '\0' && *chp != '"')
140 {
141 if (*chp == '\\')
142 {
143 chp++;
f870a310 144 if (mi_parse_escape (&chp) <= 0)
fb40c209 145 {
2b03b41d 146 /* Do not allow split lines or "\000". */
fb40c209
AC
147 freeargv (argv);
148 return;
149 }
150 }
151 else
152 chp++;
153 len++;
154 }
2b03b41d 155 /* Insist on a closing quote. */
fb40c209
AC
156 if (*chp != '"')
157 {
158 freeargv (argv);
159 return;
160 }
2b03b41d 161 /* Insist on trailing white space. */
fb40c209
AC
162 if (chp[1] != '\0' && !isspace (chp[1]))
163 {
164 freeargv (argv);
165 return;
166 }
2b03b41d 167 /* Create the buffer and copy characters in. */
224c3ddb 168 arg = XNEWVEC (char, len + 1);
fb40c209
AC
169 chp = start;
170 len = 0;
171 while (*chp != '\0' && *chp != '"')
172 {
173 if (*chp == '\\')
174 {
175 chp++;
f870a310 176 arg[len] = mi_parse_escape (&chp);
fb40c209
AC
177 }
178 else
179 arg[len] = *chp++;
180 len++;
181 }
182 arg[len] = '\0';
2b03b41d 183 chp++; /* That closing quote. */
fb40c209
AC
184 break;
185 }
186 default:
187 {
2b03b41d
SS
188 /* An unquoted string. Accumulate all non-blank
189 characters into a buffer. */
fb40c209 190 int len;
ee047554 191 const char *start = chp;
102040f0 192
fb40c209
AC
193 while (*chp != '\0' && !isspace (*chp))
194 {
195 chp++;
196 }
197 len = chp - start;
224c3ddb 198 arg = XNEWVEC (char, len + 1);
fb40c209
AC
199 strncpy (arg, start, len);
200 arg[len] = '\0';
201 break;
202 }
203 }
2b03b41d 204 /* Append arg to argv. */
224c3ddb 205 argv = XRESIZEVEC (char *, argv, argc + 2);
fb40c209
AC
206 argv[argc++] = arg;
207 argv[argc] = NULL;
208 }
209}
210
fb40c209
AC
211void
212mi_parse_free (struct mi_parse *parse)
213{
214 if (parse == NULL)
215 return;
216 if (parse->command != NULL)
b8c9b27d 217 xfree (parse->command);
fb40c209 218 if (parse->token != NULL)
b8c9b27d 219 xfree (parse->token);
fb40c209 220 if (parse->args != NULL)
b8c9b27d 221 xfree (parse->args);
fb40c209
AC
222 if (parse->argv != NULL)
223 freeargv (parse->argv);
b8c9b27d 224 xfree (parse);
fb40c209
AC
225}
226
305aeedc
TT
227/* A cleanup that calls mi_parse_free. */
228
229static void
230mi_parse_cleanup (void *arg)
231{
19ba03f4 232 mi_parse_free ((struct mi_parse *) arg);
305aeedc 233}
fb40c209
AC
234
235struct mi_parse *
ee047554 236mi_parse (const char *cmd, char **token)
fb40c209 237{
ee047554 238 const char *chp;
70ba0933 239 struct mi_parse *parse = XNEW (struct mi_parse);
305aeedc 240 struct cleanup *cleanup;
102040f0 241
fb40c209 242 memset (parse, 0, sizeof (*parse));
a79b8f6e
VP
243 parse->all = 0;
244 parse->thread_group = -1;
1e92afda
VP
245 parse->thread = -1;
246 parse->frame = -1;
403cb6b1 247 parse->language = language_unknown;
fb40c209 248
305aeedc
TT
249 cleanup = make_cleanup (mi_parse_cleanup, parse);
250
2b03b41d 251 /* Before starting, skip leading white space. */
ee047554 252 cmd = skip_spaces_const (cmd);
fb40c209 253
2b03b41d 254 /* Find/skip any token and then extract it. */
fb40c209
AC
255 for (chp = cmd; *chp >= '0' && *chp <= '9'; chp++)
256 ;
224c3ddb 257 *token = (char *) xmalloc (chp - cmd + 1);
305aeedc
TT
258 memcpy (*token, cmd, (chp - cmd));
259 (*token)[chp - cmd] = '\0';
fb40c209 260
2b03b41d 261 /* This wasn't a real MI command. Return it as a CLI_COMMAND. */
fb40c209
AC
262 if (*chp != '-')
263 {
ee047554 264 chp = skip_spaces_const (chp);
fb40c209
AC
265 parse->command = xstrdup (chp);
266 parse->op = CLI_COMMAND;
305aeedc
TT
267
268 discard_cleanups (cleanup);
269
fb40c209
AC
270 return parse;
271 }
272
2b03b41d 273 /* Extract the command. */
fb40c209 274 {
ee047554 275 const char *tmp = chp + 1; /* discard ``-'' */
102040f0 276
fb40c209
AC
277 for (; *chp && !isspace (*chp); chp++)
278 ;
224c3ddb 279 parse->command = (char *) xmalloc (chp - tmp + 1);
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AC
280 memcpy (parse->command, tmp, chp - tmp);
281 parse->command[chp - tmp] = '\0';
282 }
283
2b03b41d 284 /* Find the command in the MI table. */
fb40c209
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285 parse->cmd = mi_lookup (parse->command);
286 if (parse->cmd == NULL)
2ea126fa
JB
287 throw_error (UNDEFINED_COMMAND_ERROR,
288 _("Undefined MI command: %s"), parse->command);
fb40c209 289
2b03b41d 290 /* Skip white space following the command. */
ee047554 291 chp = skip_spaces_const (chp);
fb40c209 292
1e92afda 293 /* Parse the --thread and --frame options, if present. At present,
2b03b41d
SS
294 some important commands, like '-break-*' are implemented by
295 forwarding to the CLI layer directly. We want to parse --thread
296 and --frame here, so as not to leave those option in the string
403cb6b1
JB
297 that will be passed to CLI.
298
299 Same for the --language option. */
300
1e92afda
VP
301 for (;;)
302 {
30a7f059 303 const char *option;
a79b8f6e
VP
304 size_t as = sizeof ("--all ") - 1;
305 size_t tgs = sizeof ("--thread-group ") - 1;
1e92afda
VP
306 size_t ts = sizeof ("--thread ") - 1;
307 size_t fs = sizeof ("--frame ") - 1;
403cb6b1 308 size_t ls = sizeof ("--language ") - 1;
102040f0 309
a79b8f6e
VP
310 if (strncmp (chp, "--all ", as) == 0)
311 {
312 parse->all = 1;
313 chp += as;
314 }
315 /* See if --all is the last token in the input. */
316 if (strcmp (chp, "--all") == 0)
317 {
318 parse->all = 1;
319 chp += strlen (chp);
320 }
321 if (strncmp (chp, "--thread-group ", tgs) == 0)
322 {
ee047554
KS
323 char *endp;
324
30a7f059 325 option = "--thread-group";
a79b8f6e
VP
326 if (parse->thread_group != -1)
327 error (_("Duplicate '--thread-group' option"));
328 chp += tgs;
329 if (*chp != 'i')
330 error (_("Invalid thread group id"));
331 chp += 1;
ee047554
KS
332 parse->thread_group = strtol (chp, &endp, 10);
333 chp = endp;
a79b8f6e 334 }
8e0e408a 335 else if (strncmp (chp, "--thread ", ts) == 0)
1e92afda 336 {
ee047554
KS
337 char *endp;
338
30a7f059 339 option = "--thread";
1e92afda 340 if (parse->thread != -1)
a79b8f6e 341 error (_("Duplicate '--thread' option"));
1e92afda 342 chp += ts;
ee047554
KS
343 parse->thread = strtol (chp, &endp, 10);
344 chp = endp;
1e92afda
VP
345 }
346 else if (strncmp (chp, "--frame ", fs) == 0)
347 {
ee047554
KS
348 char *endp;
349
30a7f059 350 option = "--frame";
1e92afda 351 if (parse->frame != -1)
a79b8f6e 352 error (_("Duplicate '--frame' option"));
1e92afda 353 chp += fs;
ee047554
KS
354 parse->frame = strtol (chp, &endp, 10);
355 chp = endp;
1e92afda 356 }
403cb6b1
JB
357 else if (strncmp (chp, "--language ", ls) == 0)
358 {
359 char *lang_name;
360 struct cleanup *old_chain;
361
362 option = "--language";
363 chp += ls;
364 lang_name = extract_arg_const (&chp);
365 old_chain = make_cleanup (xfree, lang_name);
366
367 parse->language = language_enum (lang_name);
368 if (parse->language == language_unknown
369 || parse->language == language_auto)
370 error (_("Invalid --language argument: %s"), lang_name);
371
372 do_cleanups (old_chain);
373 }
1e92afda
VP
374 else
375 break;
376
377 if (*chp != '\0' && !isspace (*chp))
30a7f059 378 error (_("Invalid value for the '%s' option"), option);
ee047554 379 chp = skip_spaces_const (chp);
1e92afda
VP
380 }
381
fb40c209 382 /* For new argv commands, attempt to return the parsed argument
2b03b41d 383 list. */
fb40c209
AC
384 if (parse->cmd->argv_func != NULL)
385 {
386 mi_parse_argv (chp, parse);
387 if (parse->argv == NULL)
305aeedc 388 error (_("Problem parsing arguments: %s %s"), parse->command, chp);
fb40c209
AC
389 }
390
391 /* FIXME: DELETE THIS */
9e22b03a 392 /* For CLI commands, also return the remainder of the
fb40c209 393 command line as a single string. */
9e22b03a
VP
394 if (parse->cmd->cli.cmd != NULL)
395 parse->args = xstrdup (chp);
fb40c209 396
305aeedc
TT
397 discard_cleanups (cleanup);
398
2b03b41d 399 /* Fully parsed, flag as an MI command. */
fb40c209
AC
400 parse->op = MI_COMMAND;
401 return parse;
402}
87967e27
YQ
403
404enum print_values
405mi_parse_print_values (const char *name)
406{
407 if (strcmp (name, "0") == 0
408 || strcmp (name, mi_no_values) == 0)
409 return PRINT_NO_VALUES;
410 else if (strcmp (name, "1") == 0
411 || strcmp (name, mi_all_values) == 0)
412 return PRINT_ALL_VALUES;
413 else if (strcmp (name, "2") == 0
414 || strcmp (name, mi_simple_values) == 0)
415 return PRINT_SIMPLE_VALUES;
416 else
417 error (_("Unknown value for PRINT_VALUES: must be: \
4180 or \"%s\", 1 or \"%s\", 2 or \"%s\""),
419 mi_no_values, mi_all_values, mi_simple_values);
420}