| 1 | /* Handle set and show GDB commands. |
| 2 | |
| 3 | Copyright (c) 2000, 2001, 2002, 2003, 2007, 2008, 2009 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include "defs.h" |
| 20 | #include "readline/tilde.h" |
| 21 | #include "value.h" |
| 22 | #include <ctype.h> |
| 23 | #include "gdb_string.h" |
| 24 | |
| 25 | #include "ui-out.h" |
| 26 | |
| 27 | #include "cli/cli-decode.h" |
| 28 | #include "cli/cli-cmds.h" |
| 29 | #include "cli/cli-setshow.h" |
| 30 | |
| 31 | /* Prototypes for local functions */ |
| 32 | |
| 33 | static int parse_binary_operation (char *); |
| 34 | |
| 35 | \f |
| 36 | static enum auto_boolean |
| 37 | parse_auto_binary_operation (const char *arg) |
| 38 | { |
| 39 | if (arg != NULL && *arg != '\0') |
| 40 | { |
| 41 | int length = strlen (arg); |
| 42 | while (isspace (arg[length - 1]) && length > 0) |
| 43 | length--; |
| 44 | if (strncmp (arg, "on", length) == 0 |
| 45 | || strncmp (arg, "1", length) == 0 |
| 46 | || strncmp (arg, "yes", length) == 0 |
| 47 | || strncmp (arg, "enable", length) == 0) |
| 48 | return AUTO_BOOLEAN_TRUE; |
| 49 | else if (strncmp (arg, "off", length) == 0 |
| 50 | || strncmp (arg, "0", length) == 0 |
| 51 | || strncmp (arg, "no", length) == 0 |
| 52 | || strncmp (arg, "disable", length) == 0) |
| 53 | return AUTO_BOOLEAN_FALSE; |
| 54 | else if (strncmp (arg, "auto", length) == 0 |
| 55 | || (strncmp (arg, "-1", length) == 0 && length > 1)) |
| 56 | return AUTO_BOOLEAN_AUTO; |
| 57 | } |
| 58 | error (_("\"on\", \"off\" or \"auto\" expected.")); |
| 59 | return AUTO_BOOLEAN_AUTO; /* pacify GCC */ |
| 60 | } |
| 61 | |
| 62 | static int |
| 63 | parse_binary_operation (char *arg) |
| 64 | { |
| 65 | int length; |
| 66 | |
| 67 | if (!arg || !*arg) |
| 68 | return 1; |
| 69 | |
| 70 | length = strlen (arg); |
| 71 | |
| 72 | while (arg[length - 1] == ' ' || arg[length - 1] == '\t') |
| 73 | length--; |
| 74 | |
| 75 | if (strncmp (arg, "on", length) == 0 |
| 76 | || strncmp (arg, "1", length) == 0 |
| 77 | || strncmp (arg, "yes", length) == 0 |
| 78 | || strncmp (arg, "enable", length) == 0) |
| 79 | return 1; |
| 80 | else if (strncmp (arg, "off", length) == 0 |
| 81 | || strncmp (arg, "0", length) == 0 |
| 82 | || strncmp (arg, "no", length) == 0 |
| 83 | || strncmp (arg, "disable", length) == 0) |
| 84 | return 0; |
| 85 | else |
| 86 | { |
| 87 | error (_("\"on\" or \"off\" expected.")); |
| 88 | return 0; |
| 89 | } |
| 90 | } |
| 91 | \f |
| 92 | void |
| 93 | deprecated_show_value_hack (struct ui_file *ignore_file, |
| 94 | int ignore_from_tty, |
| 95 | struct cmd_list_element *c, |
| 96 | const char *value) |
| 97 | { |
| 98 | /* If there's no command or value, don't try to print it out. */ |
| 99 | if (c == NULL || value == NULL) |
| 100 | return; |
| 101 | /* Print doc minus "show" at start. */ |
| 102 | print_doc_line (gdb_stdout, c->doc + 5); |
| 103 | switch (c->var_type) |
| 104 | { |
| 105 | case var_string: |
| 106 | case var_string_noescape: |
| 107 | case var_optional_filename: |
| 108 | case var_filename: |
| 109 | case var_enum: |
| 110 | printf_filtered ((" is \"%s\".\n"), value); |
| 111 | break; |
| 112 | default: |
| 113 | printf_filtered ((" is %s.\n"), value); |
| 114 | break; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | /* Do a "set" or "show" command. ARG is NULL if no argument, or the text |
| 119 | of the argument, and FROM_TTY is nonzero if this command is being entered |
| 120 | directly by the user (i.e. these are just like any other |
| 121 | command). C is the command list element for the command. */ |
| 122 | |
| 123 | void |
| 124 | do_setshow_command (char *arg, int from_tty, struct cmd_list_element *c) |
| 125 | { |
| 126 | if (c->type == set_cmd) |
| 127 | { |
| 128 | switch (c->var_type) |
| 129 | { |
| 130 | case var_string: |
| 131 | { |
| 132 | char *new; |
| 133 | char *p; |
| 134 | char *q; |
| 135 | int ch; |
| 136 | |
| 137 | if (arg == NULL) |
| 138 | arg = ""; |
| 139 | new = (char *) xmalloc (strlen (arg) + 2); |
| 140 | p = arg; |
| 141 | q = new; |
| 142 | while ((ch = *p++) != '\000') |
| 143 | { |
| 144 | if (ch == '\\') |
| 145 | { |
| 146 | /* \ at end of argument is used after spaces |
| 147 | so they won't be lost. */ |
| 148 | /* This is obsolete now that we no longer strip |
| 149 | trailing whitespace and actually, the backslash |
| 150 | didn't get here in my test, readline or |
| 151 | something did something funky with a backslash |
| 152 | right before a newline. */ |
| 153 | if (*p == 0) |
| 154 | break; |
| 155 | ch = parse_escape (&p); |
| 156 | if (ch == 0) |
| 157 | break; /* C loses */ |
| 158 | else if (ch > 0) |
| 159 | *q++ = ch; |
| 160 | } |
| 161 | else |
| 162 | *q++ = ch; |
| 163 | } |
| 164 | #if 0 |
| 165 | if (*(p - 1) != '\\') |
| 166 | *q++ = ' '; |
| 167 | #endif |
| 168 | *q++ = '\0'; |
| 169 | new = (char *) xrealloc (new, q - new); |
| 170 | if (*(char **) c->var != NULL) |
| 171 | xfree (*(char **) c->var); |
| 172 | *(char **) c->var = new; |
| 173 | } |
| 174 | break; |
| 175 | case var_string_noescape: |
| 176 | if (arg == NULL) |
| 177 | arg = ""; |
| 178 | if (*(char **) c->var != NULL) |
| 179 | xfree (*(char **) c->var); |
| 180 | *(char **) c->var = savestring (arg, strlen (arg)); |
| 181 | break; |
| 182 | case var_optional_filename: |
| 183 | if (arg == NULL) |
| 184 | arg = ""; |
| 185 | if (*(char **) c->var != NULL) |
| 186 | xfree (*(char **) c->var); |
| 187 | *(char **) c->var = savestring (arg, strlen (arg)); |
| 188 | break; |
| 189 | case var_filename: |
| 190 | if (arg == NULL) |
| 191 | error_no_arg (_("filename to set it to.")); |
| 192 | if (*(char **) c->var != NULL) |
| 193 | xfree (*(char **) c->var); |
| 194 | { |
| 195 | /* Clear trailing whitespace of filename. */ |
| 196 | char *ptr = arg + strlen (arg) - 1; |
| 197 | while (ptr >= arg && (*ptr == ' ' || *ptr == '\t')) |
| 198 | ptr--; |
| 199 | *(ptr + 1) = '\0'; |
| 200 | } |
| 201 | *(char **) c->var = tilde_expand (arg); |
| 202 | break; |
| 203 | case var_boolean: |
| 204 | *(int *) c->var = parse_binary_operation (arg); |
| 205 | break; |
| 206 | case var_auto_boolean: |
| 207 | *(enum auto_boolean *) c->var = parse_auto_binary_operation (arg); |
| 208 | break; |
| 209 | case var_uinteger: |
| 210 | if (arg == NULL) |
| 211 | error_no_arg (_("integer to set it to.")); |
| 212 | *(unsigned int *) c->var = parse_and_eval_long (arg); |
| 213 | if (*(unsigned int *) c->var == 0) |
| 214 | *(unsigned int *) c->var = UINT_MAX; |
| 215 | break; |
| 216 | case var_integer: |
| 217 | { |
| 218 | unsigned int val; |
| 219 | if (arg == NULL) |
| 220 | error_no_arg (_("integer to set it to.")); |
| 221 | val = parse_and_eval_long (arg); |
| 222 | if (val == 0) |
| 223 | *(int *) c->var = INT_MAX; |
| 224 | else if (val >= INT_MAX) |
| 225 | error (_("integer %u out of range"), val); |
| 226 | else |
| 227 | *(int *) c->var = val; |
| 228 | break; |
| 229 | } |
| 230 | case var_zinteger: |
| 231 | if (arg == NULL) |
| 232 | error_no_arg (_("integer to set it to.")); |
| 233 | *(int *) c->var = parse_and_eval_long (arg); |
| 234 | break; |
| 235 | case var_zuinteger: |
| 236 | if (arg == NULL) |
| 237 | error_no_arg (_("integer to set it to.")); |
| 238 | *(unsigned int *) c->var = parse_and_eval_long (arg); |
| 239 | break; |
| 240 | case var_enum: |
| 241 | { |
| 242 | int i; |
| 243 | int len; |
| 244 | int nmatches; |
| 245 | const char *match = NULL; |
| 246 | char *p; |
| 247 | |
| 248 | /* if no argument was supplied, print an informative error message */ |
| 249 | if (arg == NULL) |
| 250 | { |
| 251 | char *msg; |
| 252 | int msg_len = 0; |
| 253 | for (i = 0; c->enums[i]; i++) |
| 254 | msg_len += strlen (c->enums[i]) + 2; |
| 255 | |
| 256 | msg = xmalloc (msg_len); |
| 257 | *msg = '\0'; |
| 258 | make_cleanup (xfree, msg); |
| 259 | |
| 260 | for (i = 0; c->enums[i]; i++) |
| 261 | { |
| 262 | if (i != 0) |
| 263 | strcat (msg, ", "); |
| 264 | strcat (msg, c->enums[i]); |
| 265 | } |
| 266 | error (_("Requires an argument. Valid arguments are %s."), msg); |
| 267 | } |
| 268 | |
| 269 | p = strchr (arg, ' '); |
| 270 | |
| 271 | if (p) |
| 272 | len = p - arg; |
| 273 | else |
| 274 | len = strlen (arg); |
| 275 | |
| 276 | nmatches = 0; |
| 277 | for (i = 0; c->enums[i]; i++) |
| 278 | if (strncmp (arg, c->enums[i], len) == 0) |
| 279 | { |
| 280 | if (c->enums[i][len] == '\0') |
| 281 | { |
| 282 | match = c->enums[i]; |
| 283 | nmatches = 1; |
| 284 | break; /* exact match. */ |
| 285 | } |
| 286 | else |
| 287 | { |
| 288 | match = c->enums[i]; |
| 289 | nmatches++; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | if (nmatches <= 0) |
| 294 | error (_("Undefined item: \"%s\"."), arg); |
| 295 | |
| 296 | if (nmatches > 1) |
| 297 | error (_("Ambiguous item \"%s\"."), arg); |
| 298 | |
| 299 | *(const char **) c->var = match; |
| 300 | } |
| 301 | break; |
| 302 | default: |
| 303 | error (_("gdb internal error: bad var_type in do_setshow_command")); |
| 304 | } |
| 305 | } |
| 306 | else if (c->type == show_cmd) |
| 307 | { |
| 308 | struct cleanup *old_chain; |
| 309 | struct ui_stream *stb; |
| 310 | |
| 311 | stb = ui_out_stream_new (uiout); |
| 312 | old_chain = make_cleanup_ui_out_stream_delete (stb); |
| 313 | |
| 314 | /* Possibly call the pre hook. */ |
| 315 | if (c->pre_show_hook) |
| 316 | (c->pre_show_hook) (c); |
| 317 | |
| 318 | switch (c->var_type) |
| 319 | { |
| 320 | case var_string: |
| 321 | if (*(char **) c->var) |
| 322 | fputstr_filtered (*(char **) c->var, '"', stb->stream); |
| 323 | break; |
| 324 | case var_string_noescape: |
| 325 | case var_optional_filename: |
| 326 | case var_filename: |
| 327 | case var_enum: |
| 328 | if (*(char **) c->var) |
| 329 | fputs_filtered (*(char **) c->var, stb->stream); |
| 330 | break; |
| 331 | case var_boolean: |
| 332 | fputs_filtered (*(int *) c->var ? "on" : "off", stb->stream); |
| 333 | break; |
| 334 | case var_auto_boolean: |
| 335 | switch (*(enum auto_boolean*) c->var) |
| 336 | { |
| 337 | case AUTO_BOOLEAN_TRUE: |
| 338 | fputs_filtered ("on", stb->stream); |
| 339 | break; |
| 340 | case AUTO_BOOLEAN_FALSE: |
| 341 | fputs_filtered ("off", stb->stream); |
| 342 | break; |
| 343 | case AUTO_BOOLEAN_AUTO: |
| 344 | fputs_filtered ("auto", stb->stream); |
| 345 | break; |
| 346 | default: |
| 347 | internal_error (__FILE__, __LINE__, |
| 348 | _("do_setshow_command: invalid var_auto_boolean")); |
| 349 | break; |
| 350 | } |
| 351 | break; |
| 352 | case var_uinteger: |
| 353 | if (*(unsigned int *) c->var == UINT_MAX) |
| 354 | { |
| 355 | fputs_filtered ("unlimited", stb->stream); |
| 356 | break; |
| 357 | } |
| 358 | /* else fall through */ |
| 359 | case var_zuinteger: |
| 360 | case var_zinteger: |
| 361 | fprintf_filtered (stb->stream, "%u", *(unsigned int *) c->var); |
| 362 | break; |
| 363 | case var_integer: |
| 364 | if (*(int *) c->var == INT_MAX) |
| 365 | { |
| 366 | fputs_filtered ("unlimited", stb->stream); |
| 367 | } |
| 368 | else |
| 369 | fprintf_filtered (stb->stream, "%d", *(int *) c->var); |
| 370 | break; |
| 371 | |
| 372 | default: |
| 373 | error (_("gdb internal error: bad var_type in do_setshow_command")); |
| 374 | } |
| 375 | |
| 376 | |
| 377 | /* FIXME: cagney/2005-02-10: Need to split this in half: code to |
| 378 | convert the value into a string (esentially the above); and |
| 379 | code to print the value out. For the latter there should be |
| 380 | MI and CLI specific versions. */ |
| 381 | |
| 382 | if (ui_out_is_mi_like_p (uiout)) |
| 383 | ui_out_field_stream (uiout, "value", stb); |
| 384 | else |
| 385 | { |
| 386 | long length; |
| 387 | char *value = ui_file_xstrdup (stb->stream, &length); |
| 388 | make_cleanup (xfree, value); |
| 389 | if (c->show_value_func != NULL) |
| 390 | c->show_value_func (gdb_stdout, from_tty, c, value); |
| 391 | else |
| 392 | deprecated_show_value_hack (gdb_stdout, from_tty, c, value); |
| 393 | } |
| 394 | do_cleanups (old_chain); |
| 395 | } |
| 396 | else |
| 397 | error (_("gdb internal error: bad cmd_type in do_setshow_command")); |
| 398 | c->func (c, NULL, from_tty); |
| 399 | if (c->type == set_cmd && deprecated_set_hook) |
| 400 | deprecated_set_hook (c); |
| 401 | } |
| 402 | |
| 403 | /* Show all the settings in a list of show commands. */ |
| 404 | |
| 405 | void |
| 406 | cmd_show_list (struct cmd_list_element *list, int from_tty, char *prefix) |
| 407 | { |
| 408 | struct cleanup *showlist_chain; |
| 409 | |
| 410 | showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist"); |
| 411 | for (; list != NULL; list = list->next) |
| 412 | { |
| 413 | /* If we find a prefix, run its list, prefixing our output by its |
| 414 | prefix (with "show " skipped). */ |
| 415 | if (list->prefixlist && !list->abbrev_flag) |
| 416 | { |
| 417 | struct cleanup *optionlist_chain |
| 418 | = make_cleanup_ui_out_tuple_begin_end (uiout, "optionlist"); |
| 419 | char *new_prefix = strstr (list->prefixname, "show ") + 5; |
| 420 | if (ui_out_is_mi_like_p (uiout)) |
| 421 | ui_out_field_string (uiout, "prefix", new_prefix); |
| 422 | cmd_show_list (*list->prefixlist, from_tty, new_prefix); |
| 423 | /* Close the tuple. */ |
| 424 | do_cleanups (optionlist_chain); |
| 425 | } |
| 426 | else |
| 427 | { |
| 428 | struct cleanup *option_chain |
| 429 | = make_cleanup_ui_out_tuple_begin_end (uiout, "option"); |
| 430 | ui_out_text (uiout, prefix); |
| 431 | ui_out_field_string (uiout, "name", list->name); |
| 432 | ui_out_text (uiout, ": "); |
| 433 | if (list->type == show_cmd) |
| 434 | do_setshow_command ((char *) NULL, from_tty, list); |
| 435 | else |
| 436 | cmd_func (list, NULL, from_tty); |
| 437 | /* Close the tuple. */ |
| 438 | do_cleanups (option_chain); |
| 439 | } |
| 440 | } |
| 441 | /* Close the tuple. */ |
| 442 | do_cleanups (showlist_chain); |
| 443 | } |
| 444 | |