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e9cafbcc TT |
1 | /* CLI utilities. |
2 | ||
3 | Copyright (c) 2011 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "cli/cli-utils.h" | |
22 | #include "gdb_string.h" | |
23 | #include "value.h" | |
3bd0f5ef | 24 | #include "gdb_assert.h" |
e9cafbcc TT |
25 | |
26 | #include <ctype.h> | |
27 | ||
28 | /* *PP is a string denoting a number. Get the number of the. Advance | |
29 | *PP after the string and any trailing whitespace. | |
30 | ||
3bd0f5ef MS |
31 | Currently the string can either be a number, or "$" followed by the |
32 | name of a convenience variable, or ("$" or "$$") followed by digits. | |
e9cafbcc TT |
33 | |
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. */ | |
36 | ||
37 | static int | |
38 | get_number_trailer (char **pp, int trailer) | |
39 | { | |
40 | int retval = 0; /* default */ | |
41 | char *p = *pp; | |
42 | ||
43 | if (*p == '$') | |
44 | { | |
3bd0f5ef | 45 | struct value *val = value_from_history_ref (p, &p); |
e9cafbcc | 46 | |
3bd0f5ef | 47 | if (val) /* Value history reference */ |
e9cafbcc | 48 | { |
3bd0f5ef MS |
49 | if (TYPE_CODE (value_type (val)) == TYPE_CODE_INT) |
50 | retval = value_as_long (val); | |
51 | else | |
52 | { | |
53 | printf_filtered (_("History value must have integer type.")); | |
54 | retval = 0; | |
55 | } | |
56 | } | |
57 | else /* Convenience variable */ | |
58 | { | |
59 | /* Internal variable. Make a copy of the name, so we can | |
60 | null-terminate it to pass to lookup_internalvar(). */ | |
61 | char *varname; | |
62 | char *start = ++p; | |
63 | LONGEST val; | |
64 | ||
65 | while (isalnum (*p) || *p == '_') | |
66 | 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)) | |
71 | retval = (int) val; | |
72 | else | |
73 | { | |
74 | printf_filtered (_("Convenience variable must " | |
75 | "have integer value.\n")); | |
76 | retval = 0; | |
77 | } | |
e9cafbcc TT |
78 | } |
79 | } | |
80 | else | |
81 | { | |
82 | if (*p == '-') | |
83 | ++p; | |
84 | while (*p >= '0' && *p <= '9') | |
85 | ++p; | |
86 | if (p == *pp) | |
87 | /* There is no number here. (e.g. "cond a == b"). */ | |
88 | { | |
89 | /* Skip non-numeric token. */ | |
90 | while (*p && !isspace((int) *p)) | |
91 | ++p; | |
92 | /* Return zero, which caller must interpret as error. */ | |
93 | retval = 0; | |
94 | } | |
95 | else | |
96 | retval = atoi (*pp); | |
97 | } | |
98 | if (!(isspace (*p) || *p == '\0' || *p == trailer)) | |
99 | { | |
100 | /* Trailing junk: return 0 and let caller print error msg. */ | |
101 | while (!(isspace (*p) || *p == '\0' || *p == trailer)) | |
102 | ++p; | |
103 | retval = 0; | |
104 | } | |
105 | p = skip_spaces (p); | |
106 | *pp = p; | |
107 | return retval; | |
108 | } | |
109 | ||
110 | /* See documentation in cli-utils.h. */ | |
111 | ||
112 | int | |
113 | get_number (char **pp) | |
114 | { | |
115 | return get_number_trailer (pp, '\0'); | |
116 | } | |
117 | ||
118 | /* See documentation in cli-utils.h. */ | |
119 | ||
197f0a60 TT |
120 | void |
121 | init_number_or_range (struct get_number_or_range_state *state, | |
122 | char *string) | |
e9cafbcc | 123 | { |
197f0a60 TT |
124 | memset (state, 0, sizeof (*state)); |
125 | state->string = string; | |
126 | } | |
127 | ||
128 | /* See documentation in cli-utils.h. */ | |
e9cafbcc | 129 | |
197f0a60 TT |
130 | int |
131 | get_number_or_range (struct get_number_or_range_state *state) | |
132 | { | |
133 | if (*state->string != '-') | |
e9cafbcc | 134 | { |
197f0a60 TT |
135 | /* Default case: state->string is pointing either to a solo |
136 | number, or to the first number of a range. */ | |
137 | state->last_retval = get_number_trailer (&state->string, '-'); | |
138 | if (*state->string == '-') | |
e9cafbcc TT |
139 | { |
140 | char **temp; | |
141 | ||
142 | /* This is the start of a range (<number1> - <number2>). | |
143 | Skip the '-', parse and remember the second number, | |
144 | and also remember the end of the final token. */ | |
145 | ||
197f0a60 TT |
146 | temp = &state->end_ptr; |
147 | state->end_ptr = skip_spaces (state->string + 1); | |
148 | state->end_value = get_number (temp); | |
149 | if (state->end_value < state->last_retval) | |
e9cafbcc TT |
150 | { |
151 | error (_("inverted range")); | |
152 | } | |
197f0a60 | 153 | else if (state->end_value == state->last_retval) |
e9cafbcc TT |
154 | { |
155 | /* Degenerate range (number1 == number2). Advance the | |
156 | token pointer so that the range will be treated as a | |
157 | single number. */ | |
197f0a60 | 158 | state->string = state->end_ptr; |
e9cafbcc TT |
159 | } |
160 | else | |
197f0a60 | 161 | state->in_range = 1; |
e9cafbcc TT |
162 | } |
163 | } | |
197f0a60 | 164 | else if (! state->in_range) |
e9cafbcc TT |
165 | error (_("negative value")); |
166 | else | |
167 | { | |
197f0a60 | 168 | /* state->string points to the '-' that betokens a range. All |
e9cafbcc TT |
169 | number-parsing has already been done. Return the next |
170 | integer value (one greater than the saved previous value). | |
197f0a60 | 171 | Do not advance the token pointer until the end of range |
e9cafbcc TT |
172 | is reached. */ |
173 | ||
197f0a60 | 174 | if (++state->last_retval == state->end_value) |
e9cafbcc TT |
175 | { |
176 | /* End of range reached; advance token pointer. */ | |
197f0a60 TT |
177 | state->string = state->end_ptr; |
178 | state->in_range = 0; | |
e9cafbcc TT |
179 | } |
180 | } | |
197f0a60 TT |
181 | state->finished = *state->string == '\0'; |
182 | return state->last_retval; | |
e9cafbcc TT |
183 | } |
184 | ||
aea5b279 MS |
185 | /* Accept a number and a string-form list of numbers such as is |
186 | accepted by get_number_or_range. Return TRUE if the number is | |
187 | in the list. | |
188 | ||
189 | By definition, an empty list includes all numbers. This is to | |
190 | be interpreted as typing a command such as "delete break" with | |
191 | no arguments. */ | |
192 | ||
193 | int | |
194 | number_is_in_list (char *list, int number) | |
195 | { | |
197f0a60 TT |
196 | struct get_number_or_range_state state; |
197 | ||
aea5b279 MS |
198 | if (list == NULL || *list == '\0') |
199 | return 1; | |
200 | ||
197f0a60 TT |
201 | init_number_or_range (&state, list); |
202 | while (!state.finished) | |
298f437a | 203 | { |
197f0a60 | 204 | int gotnum = get_number_or_range (&state); |
aea5b279 | 205 | |
298f437a MS |
206 | if (gotnum == 0) |
207 | error (_("Args must be numbers or '$' variables.")); | |
208 | if (gotnum == number) | |
209 | return 1; | |
210 | } | |
aea5b279 MS |
211 | return 0; |
212 | } | |
213 | ||
e9cafbcc TT |
214 | /* See documentation in cli-utils.h. */ |
215 | ||
216 | char * | |
217 | skip_spaces (char *chp) | |
218 | { | |
219 | if (chp == NULL) | |
220 | return NULL; | |
221 | while (*chp && isspace (*chp)) | |
222 | chp++; | |
223 | return chp; | |
224 | } | |
225 | ||
226 | /* See documentation in cli-utils.h. */ | |
227 | ||
228 | char * | |
229 | skip_to_space (char *chp) | |
230 | { | |
231 | if (chp == NULL) | |
232 | return NULL; | |
233 | while (*chp && !isspace (*chp)) | |
234 | chp++; | |
235 | return chp; | |
236 | } | |
c00f8484 KS |
237 | |
238 | /* See documentation in cli-utils.h. */ | |
239 | ||
240 | char * | |
241 | remove_trailing_whitespace (const char *start, char *s) | |
242 | { | |
243 | while (s > start && isspace (*(s - 1))) | |
244 | --s; | |
245 | ||
246 | return s; | |
247 | } |