3 Copyright (C) 2011-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program 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.
12 This program 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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "cli/cli-utils.h"
24 #include "gdb_assert.h"
28 /* *PP is a string denoting a number. Get the number of the. Advance
29 *PP after the string and any trailing whitespace.
31 Currently the string can either be a number, or "$" followed by the
32 name of a convenience variable, or ("$" or "$$") followed by digits.
34 TRAILER is a character which can be found after the number; most
35 commonly this is `-'. If you don't want a trailer, use \0. */
38 get_number_trailer (const char **pp, int trailer)
40 int retval = 0; /* default */
45 struct value *val = value_from_history_ref (p, &p);
47 if (val) /* Value history reference */
49 if (TYPE_CODE (value_type (val)) == TYPE_CODE_INT)
50 retval = value_as_long (val);
53 printf_filtered (_("History value must have integer type.\n"));
57 else /* Convenience variable */
59 /* Internal variable. Make a copy of the name, so we can
60 null-terminate it to pass to lookup_internalvar(). */
62 const char *start = ++p;
65 while (isalnum (*p) || *p == '_')
67 varname = (char *) alloca (p - start + 1);
68 strncpy (varname, start, p - start);
69 varname[p - start] = '\0';
70 if (get_internalvar_integer (lookup_internalvar (varname), &val))
74 printf_filtered (_("Convenience variable must "
75 "have integer value.\n"));
84 while (*p >= '0' && *p <= '9')
87 /* There is no number here. (e.g. "cond a == b"). */
89 /* Skip non-numeric token. */
90 while (*p && !isspace((int) *p))
92 /* Return zero, which caller must interpret as error. */
98 if (!(isspace (*p) || *p == '\0' || *p == trailer))
100 /* Trailing junk: return 0 and let caller print error msg. */
101 while (!(isspace (*p) || *p == '\0' || *p == trailer))
105 p = skip_spaces_const (p);
110 /* See documentation in cli-utils.h. */
113 get_number_const (const char **pp)
115 return get_number_trailer (pp, '\0');
118 /* See documentation in cli-utils.h. */
121 get_number (char **pp)
126 result = get_number_trailer (&p, '\0');
131 /* See documentation in cli-utils.h. */
134 init_number_or_range (struct get_number_or_range_state *state,
137 memset (state, 0, sizeof (*state));
138 state->string = string;
141 /* See documentation in cli-utils.h. */
144 get_number_or_range (struct get_number_or_range_state *state)
146 if (*state->string != '-')
148 /* Default case: state->string is pointing either to a solo
149 number, or to the first number of a range. */
150 state->last_retval = get_number_trailer (&state->string, '-');
151 if (*state->string == '-')
155 /* This is the start of a range (<number1> - <number2>).
156 Skip the '-', parse and remember the second number,
157 and also remember the end of the final token. */
159 temp = &state->end_ptr;
160 state->end_ptr = skip_spaces_const (state->string + 1);
161 state->end_value = get_number_const (temp);
162 if (state->end_value < state->last_retval)
164 error (_("inverted range"));
166 else if (state->end_value == state->last_retval)
168 /* Degenerate range (number1 == number2). Advance the
169 token pointer so that the range will be treated as a
171 state->string = state->end_ptr;
177 else if (! state->in_range)
178 error (_("negative value"));
181 /* state->string points to the '-' that betokens a range. All
182 number-parsing has already been done. Return the next
183 integer value (one greater than the saved previous value).
184 Do not advance the token pointer until the end of range
187 if (++state->last_retval == state->end_value)
189 /* End of range reached; advance token pointer. */
190 state->string = state->end_ptr;
194 state->finished = *state->string == '\0';
195 return state->last_retval;
198 /* Accept a number and a string-form list of numbers such as is
199 accepted by get_number_or_range. Return TRUE if the number is
202 By definition, an empty list includes all numbers. This is to
203 be interpreted as typing a command such as "delete break" with
207 number_is_in_list (const char *list, int number)
209 struct get_number_or_range_state state;
211 if (list == NULL || *list == '\0')
214 init_number_or_range (&state, list);
215 while (!state.finished)
217 int gotnum = get_number_or_range (&state);
220 error (_("Args must be numbers or '$' variables."));
221 if (gotnum == number)
227 /* See documentation in cli-utils.h. */
230 skip_spaces (char *chp)
234 while (*chp && isspace (*chp))
239 /* A const-correct version of the above. */
242 skip_spaces_const (const char *chp)
246 while (*chp && isspace (*chp))
251 /* See documentation in cli-utils.h. */
254 skip_to_space_const (const char *chp)
258 while (*chp && !isspace (*chp))
263 /* See documentation in cli-utils.h. */
266 remove_trailing_whitespace (const char *start, char *s)
268 while (s > start && isspace (*(s - 1)))
274 /* See documentation in cli-utils.h. */
277 extract_arg_const (const char **arg)
284 /* Find the start of the argument. */
285 *arg = skip_spaces_const (*arg);
290 /* Find the end of the argument. */
291 *arg = skip_to_space_const (*arg + 1);
296 return savestring (result, *arg - result);
299 /* See documentation in cli-utils.h. */
302 extract_arg (char **arg)
304 const char *arg_const = *arg;
307 result = extract_arg_const (&arg_const);
308 *arg += arg_const - *arg;
312 /* See documentation in cli-utils.h. */
315 check_for_argument (char **str, char *arg, int arg_len)
317 if (strncmp (*str, arg, arg_len) == 0
318 && ((*str)[arg_len] == '\0' || isspace ((*str)[arg_len])))