107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/* CLI utilities.
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Copyright (c) 2011-2012 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef CLI_UTILS_H
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#define CLI_UTILS_H
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/* *PP is a string denoting a number. Get the number of the. Advance
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*PP after the string and any trailing whitespace.
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Currently the string can either be a number, or "$" followed by the
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name of a convenience variable, or ("$" or "$$") followed by digits. */
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extern int get_number (char **);
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/* An object of this type is passed to get_number_or_range. It must
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be initialized by calling init_number_or_range. This type is
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defined here so that it can be stack-allocated, but all members
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other than `finished' and `string' should be treated as opaque. */
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struct get_number_or_range_state
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{
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/* Non-zero if parsing has completed. */
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int finished;
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/* The string being parsed. When parsing has finished, this points
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past the last parsed token. */
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char *string;
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/* Last value returned. */
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int last_retval;
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/* When parsing a range, the final value in the range. */
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int end_value;
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/* When parsing a range, a pointer past the final token in the
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range. */
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char *end_ptr;
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/* Non-zero when parsing a range. */
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int in_range;
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};
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/* Initialize a get_number_or_range_state for use with
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get_number_or_range_state. STRING is the string to be parsed. */
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extern void init_number_or_range (struct get_number_or_range_state *state,
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char *string);
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/* Parse a number or a range.
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A number will be of the form handled by get_number.
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A range will be of the form <number1> - <number2>, and
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will represent all the integers between number1 and number2,
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inclusive.
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While processing a range, this fuction is called iteratively;
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At each call it will return the next value in the range.
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At the beginning of parsing a range, the char pointer STATE->string will
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be advanced past <number1> and left pointing at the '-' token.
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Subsequent calls will not advance the pointer until the range
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is completed. The call that completes the range will advance
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the pointer past <number2>. */
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extern int get_number_or_range (struct get_number_or_range_state *state);
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/* Accept a number and a string-form list of numbers such as is
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accepted by get_number_or_range. Return TRUE if the number is
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in the list.
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By definition, an empty list includes all numbers. This is to
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be interpreted as typing a command such as "delete break" with
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no arguments. */
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extern int number_is_in_list (char *list, int number);
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/* Skip leading whitespace characters in INP, returning an updated
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pointer. If INP is NULL, return NULL. */
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extern char *skip_spaces (char *inp);
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/* Skip leading non-whitespace characters in INP, returning an updated
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pointer. If INP is NULL, return NULL. */
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extern char *skip_to_space (char *inp);
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/* Reverse S to the last non-whitespace character without skipping past
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START. */
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extern char *remove_trailing_whitespace (const char *start, char *s);
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#endif /* CLI_UTILS_H */
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