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/* CLI utilities.
Copyright (C) 2011-2014 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef CLI_UTILS_H
#define CLI_UTILS_H
/* *PP is a string denoting a number. Get the number of the. Advance
*PP after the string and any trailing whitespace.
Currently the string can either be a number, or "$" followed by the
name of a convenience variable, or ("$" or "$$") followed by digits. */
extern int get_number (char **);
/* An object of this type is passed to get_number_or_range. It must
be initialized by calling init_number_or_range. This type is
defined here so that it can be stack-allocated, but all members
other than `finished' and `string' should be treated as opaque. */
struct get_number_or_range_state
{
/* Non-zero if parsing has completed. */
int finished;
/* The string being parsed. When parsing has finished, this points
past the last parsed token. */
char *string;
/* Last value returned. */
int last_retval;
/* When parsing a range, the final value in the range. */
int end_value;
/* When parsing a range, a pointer past the final token in the
range. */
char *end_ptr;
/* Non-zero when parsing a range. */
int in_range;
};
/* Initialize a get_number_or_range_state for use with
get_number_or_range_state. STRING is the string to be parsed. */
extern void init_number_or_range (struct get_number_or_range_state *state,
char *string);
/* Parse a number or a range.
A number will be of the form handled by get_number.
A range will be of the form <number1> - <number2>, and
will represent all the integers between number1 and number2,
inclusive.
While processing a range, this fuction is called iteratively;
At each call it will return the next value in the range.
At the beginning of parsing a range, the char pointer STATE->string will
be advanced past <number1> and left pointing at the '-' token.
Subsequent calls will not advance the pointer until the range
is completed. The call that completes the range will advance
the pointer past <number2>. */
extern int get_number_or_range (struct get_number_or_range_state *state);
/* Accept a number and a string-form list of numbers such as is
accepted by get_number_or_range. Return TRUE if the number is
in the list.
By definition, an empty list includes all numbers. This is to
be interpreted as typing a command such as "delete break" with
no arguments. */
extern int number_is_in_list (char *list, int number);
/* Skip leading whitespace characters in INP, returning an updated
pointer. If INP is NULL, return NULL. */
extern char *skip_spaces (char *inp);
/* A const-correct version of the above. */
extern const char *skip_spaces_const (const char *inp);
/* Skip leading non-whitespace characters in INP, returning an updated
pointer. If INP is NULL, return NULL. */
#define skip_to_space(INP) ((char *) skip_to_space_const (INP))
/* A const-correct version of the above. */
extern const char *skip_to_space_const (const char *inp);
/* Reverse S to the last non-whitespace character without skipping past
START. */
extern char *remove_trailing_whitespace (const char *start, char *s);
/* A helper function to extract an argument from *ARG. An argument is
delimited by whitespace. The return value is either NULL if no
argument was found, or an xmalloc'd string. */
extern char *extract_arg (char **arg);
/* A const-correct version of "extract_arg".
Since the returned value is xmalloc'd, it eventually needs to be
xfree'ed, which prevents us from making it const as well. */
extern char *extract_arg_const (const char **arg);
/* A helper function that looks for an argument at the start of a
string. The argument must also either be at the end of the string,
or be followed by whitespace. Returns 1 if it finds the argument,
0 otherwise. If the argument is found, it updates *STR. */
extern int check_for_argument (char **str, char *arg, int arg_len);
#endif /* CLI_UTILS_H */
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