3 Copyright (C) 2011-2017 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/>. */
23 /* *PP is a string denoting a number. Get the number. Advance *PP
24 after the string and any trailing whitespace.
26 The string can either be a number, or "$" followed by the name of a
27 convenience variable, or ("$" or "$$") followed by digits.
29 TRAILER is a character which can be found after the number; most
30 commonly this is `-'. If you don't want a trailer, use \0. */
32 extern int get_number_trailer (const char **pp
, int trailer
);
34 /* Convenience. Like get_number_trailer, but with no TRAILER. */
36 extern int get_number_const (const char **);
38 /* Like get_number_const, but takes a non-const "char **". */
40 extern int get_number (char **);
42 /* Parse a number or a range.
43 A number will be of the form handled by get_number.
44 A range will be of the form <number1> - <number2>, and
45 will represent all the integers between number1 and number2,
48 class number_or_range_parser
51 /* Default construction. Must call init before calling
53 number_or_range_parser () {}
55 /* Calls init automatically. */
56 number_or_range_parser (const char *string
);
58 /* STRING is the string to be parsed. */
59 void init (const char *string
);
61 /* While processing a range, this fuction is called iteratively; At
62 each call it will return the next value in the range.
64 At the beginning of parsing a range, the char pointer
65 STATE->m_cur_tok will be advanced past <number1> and left
66 pointing at the '-' token. Subsequent calls will not advance the
67 pointer until the range is completed. The call that completes
68 the range will advance the pointer past <number2>. */
71 /* Setup internal state such that get_next() returns numbers in the
72 START_VALUE to END_VALUE range. END_PTR is where the string is
73 advanced to when get_next() returns END_VALUE. */
74 void setup_range (int start_value
, int end_value
,
77 /* Returns true if parsing has completed. */
78 bool finished () const
79 { return m_finished
; }
81 /* Return the string being parsed. When parsing has finished, this
82 points past the last parsed token. */
83 const char *cur_tok () const
86 /* True when parsing a range. */
87 bool in_range () const
88 { return m_in_range
; }
90 /* When parsing a range, the final value in the range. */
91 int end_value () const
92 { return m_end_value
; }
94 /* When parsing a range, skip past the final token in the range. */
97 gdb_assert (m_in_range
);
98 m_cur_tok
= m_end_ptr
;
102 /* No need for these. They are intentionally not defined anywhere. */
103 number_or_range_parser (const number_or_range_parser
&);
104 number_or_range_parser
&operator= (const number_or_range_parser
&);
106 /* True if parsing has completed. */
109 /* The string being parsed. When parsing has finished, this points
110 past the last parsed token. */
111 const char *m_cur_tok
;
113 /* Last value returned. */
116 /* When parsing a range, the final value in the range. */
119 /* When parsing a range, a pointer past the final token in the
121 const char *m_end_ptr
;
123 /* True when parsing a range. */
127 /* Accept a number and a string-form list of numbers such as is
128 accepted by get_number_or_range. Return TRUE if the number is
131 By definition, an empty list includes all numbers. This is to
132 be interpreted as typing a command such as "delete break" with
135 extern int number_is_in_list (const char *list
, int number
);
137 /* Reverse S to the last non-whitespace character without skipping past
140 extern const char *remove_trailing_whitespace (const char *start
,
143 /* Same, for non-const S. */
146 remove_trailing_whitespace (const char *start
, char *s
)
148 return (char *) remove_trailing_whitespace (start
, (const char *) s
);
151 /* A helper function to extract an argument from *ARG. An argument is
152 delimited by whitespace. The return value is either NULL if no
153 argument was found, or an xmalloc'd string. */
155 extern char *extract_arg (char **arg
);
157 /* A const-correct version of "extract_arg".
159 Since the returned value is xmalloc'd, it eventually needs to be
160 xfree'ed, which prevents us from making it const as well. */
162 extern char *extract_arg_const (const char **arg
);
164 /* A helper function that looks for an argument at the start of a
165 string. The argument must also either be at the end of the string,
166 or be followed by whitespace. Returns 1 if it finds the argument,
167 0 otherwise. If the argument is found, it updates *STR. */
168 extern int check_for_argument (const char **str
, const char *arg
, int arg_len
);
170 /* Same, for non-const STR. */
173 check_for_argument (char **str
, const char *arg
, int arg_len
)
175 return check_for_argument (const_cast<const char **> (str
),
179 #endif /* CLI_UTILS_H */
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