3 Copyright (C) 2011-2016 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"
26 /* See documentation in cli-utils.h. */
29 get_number_trailer (const char **pp, int trailer)
31 int retval = 0; /* default */
36 struct value *val = value_from_history_ref (p, &p);
38 if (val) /* Value history reference */
40 if (TYPE_CODE (value_type (val)) == TYPE_CODE_INT)
41 retval = value_as_long (val);
44 printf_filtered (_("History value must have integer type.\n"));
48 else /* Convenience variable */
50 /* Internal variable. Make a copy of the name, so we can
51 null-terminate it to pass to lookup_internalvar(). */
53 const char *start = ++p;
56 while (isalnum (*p) || *p == '_')
58 varname = (char *) alloca (p - start + 1);
59 strncpy (varname, start, p - start);
60 varname[p - start] = '\0';
61 if (get_internalvar_integer (lookup_internalvar (varname), &val))
65 printf_filtered (_("Convenience variable must "
66 "have integer value.\n"));
75 while (*p >= '0' && *p <= '9')
78 /* There is no number here. (e.g. "cond a == b"). */
80 /* Skip non-numeric token. */
81 while (*p && !isspace((int) *p))
83 /* Return zero, which caller must interpret as error. */
89 if (!(isspace (*p) || *p == '\0' || *p == trailer))
91 /* Trailing junk: return 0 and let caller print error msg. */
92 while (!(isspace (*p) || *p == '\0' || *p == trailer))
96 p = skip_spaces_const (p);
101 /* See documentation in cli-utils.h. */
104 get_number_const (const char **pp)
106 return get_number_trailer (pp, '\0');
109 /* See documentation in cli-utils.h. */
112 get_number (char **pp)
117 result = get_number_trailer (&p, '\0');
122 /* See documentation in cli-utils.h. */
125 init_number_or_range (struct get_number_or_range_state *state,
128 memset (state, 0, sizeof (*state));
129 state->string = string;
132 /* See documentation in cli-utils.h. */
135 get_number_or_range (struct get_number_or_range_state *state)
137 if (*state->string != '-')
139 /* Default case: state->string is pointing either to a solo
140 number, or to the first number of a range. */
141 state->last_retval = get_number_trailer (&state->string, '-');
142 if (*state->string == '-')
146 /* This is the start of a range (<number1> - <number2>).
147 Skip the '-', parse and remember the second number,
148 and also remember the end of the final token. */
150 temp = &state->end_ptr;
151 state->end_ptr = skip_spaces_const (state->string + 1);
152 state->end_value = get_number_const (temp);
153 if (state->end_value < state->last_retval)
155 error (_("inverted range"));
157 else if (state->end_value == state->last_retval)
159 /* Degenerate range (number1 == number2). Advance the
160 token pointer so that the range will be treated as a
162 state->string = state->end_ptr;
168 else if (! state->in_range)
169 error (_("negative value"));
172 /* state->string points to the '-' that betokens a range. All
173 number-parsing has already been done. Return the next
174 integer value (one greater than the saved previous value).
175 Do not advance the token pointer until the end of range
178 if (++state->last_retval == state->end_value)
180 /* End of range reached; advance token pointer. */
181 state->string = state->end_ptr;
185 state->finished = *state->string == '\0';
186 return state->last_retval;
189 /* Accept a number and a string-form list of numbers such as is
190 accepted by get_number_or_range. Return TRUE if the number is
193 By definition, an empty list includes all numbers. This is to
194 be interpreted as typing a command such as "delete break" with
198 number_is_in_list (const char *list, int number)
200 struct get_number_or_range_state state;
202 if (list == NULL || *list == '\0')
205 init_number_or_range (&state, list);
206 while (!state.finished)
208 int gotnum = get_number_or_range (&state);
211 error (_("Args must be numbers or '$' variables."));
212 if (gotnum == number)
218 /* See documentation in cli-utils.h. */
221 remove_trailing_whitespace (const char *start, char *s)
223 while (s > start && isspace (*(s - 1)))
229 /* See documentation in cli-utils.h. */
232 extract_arg_const (const char **arg)
239 /* Find the start of the argument. */
240 *arg = skip_spaces_const (*arg);
245 /* Find the end of the argument. */
246 *arg = skip_to_space_const (*arg + 1);
251 return savestring (result, *arg - result);
254 /* See documentation in cli-utils.h. */
257 extract_arg (char **arg)
259 const char *arg_const = *arg;
262 result = extract_arg_const (&arg_const);
263 *arg += arg_const - *arg;
267 /* See documentation in cli-utils.h. */
270 check_for_argument (char **str, char *arg, int arg_len)
272 if (strncmp (*str, arg, arg_len) == 0
273 && ((*str)[arg_len] == '\0' || isspace ((*str)[arg_len])))