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229 lines
7.0 KiB
C++
229 lines
7.0 KiB
C++
/* CLI utilities.
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Copyright (C) 2011-2020 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_CLI_UTILS_H
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#define CLI_CLI_UTILS_H
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#include "completer.h"
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struct cmd_list_element;
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/* *PP is a string denoting a number. Get the number. Advance *PP
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after the string and any trailing whitespace.
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The string can either be a number, or "$" followed by the name of a
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convenience variable, or ("$" or "$$") followed by digits.
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TRAILER is a character which can be found after the number; most
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commonly this is `-'. If you don't want a trailer, use \0. */
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extern int get_number_trailer (const char **pp, int trailer);
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/* Convenience. Like get_number_trailer, but with no TRAILER. */
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extern int get_number (const char **);
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/* Like the above, but takes a non-const "char **". */
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extern int get_number (char **);
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/* Like get_number_trailer, but works with ULONGEST, and throws on
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error instead of returning 0. */
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extern ULONGEST get_ulongest (const char **pp, int trailer = '\0');
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/* Throws an error telling the user that ARGS starts with an option
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unrecognized by COMMAND. */
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extern void report_unrecognized_option_error (const char *command,
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const char *args);
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/* Builds the help string for a command documented by PREFIX,
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followed by the extract_info_print_args help for ENTITY_KIND. If
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DOCUMENT_N_FLAG is true then help text describing the -n flag is also
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included. */
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const char *info_print_args_help (const char *prefix,
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const char *entity_kind,
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bool document_n_flag);
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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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class number_or_range_parser
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{
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public:
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/* Default construction. Must call init before calling
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get_next. */
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number_or_range_parser () {}
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/* Calls init automatically. */
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number_or_range_parser (const char *string);
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/* STRING is the string to be parsed. */
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void init (const char *string);
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/* While processing a range, this fuction is called iteratively; At
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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
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STATE->m_cur_tok will be advanced past <number1> and left
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pointing at the '-' token. Subsequent calls will not advance the
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pointer until the range is completed. The call that completes
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the range will advance the pointer past <number2>. */
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int get_number ();
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/* Setup internal state such that get_next() returns numbers in the
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START_VALUE to END_VALUE range. END_PTR is where the string is
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advanced to when get_next() returns END_VALUE. */
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void setup_range (int start_value, int end_value,
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const char *end_ptr);
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/* Returns true if parsing has completed. */
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bool finished () const;
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/* Return the string being parsed. When parsing has finished, this
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points past the last parsed token. */
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const char *cur_tok () const
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{ return m_cur_tok; }
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/* True when parsing a range. */
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bool in_range () const
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{ return m_in_range; }
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/* When parsing a range, the final value in the range. */
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int end_value () const
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{ return m_end_value; }
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/* When parsing a range, skip past the final token in the range. */
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void skip_range ()
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{
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gdb_assert (m_in_range);
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m_cur_tok = m_end_ptr;
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m_in_range = false;
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}
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private:
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/* No need for these. They are intentionally not defined anywhere. */
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number_or_range_parser (const number_or_range_parser &);
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number_or_range_parser &operator= (const number_or_range_parser &);
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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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const char *m_cur_tok;
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/* Last value returned. */
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int m_last_retval;
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/* When parsing a range, the final value in the range. */
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int m_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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const char *m_end_ptr;
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/* True when parsing a range. */
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bool m_in_range;
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};
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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 (const char *list, int number);
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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 const char *remove_trailing_whitespace (const char *start,
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const char *s);
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/* Same, for non-const S. */
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static inline char *
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remove_trailing_whitespace (const char *start, char *s)
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{
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return (char *) remove_trailing_whitespace (start, (const char *) s);
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}
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/* A helper function to extract an argument from *ARG. An argument is
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delimited by whitespace. The return value is empty if no argument
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was found. */
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extern std::string extract_arg (char **arg);
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/* A const-correct version of the above. */
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extern std::string extract_arg (const char **arg);
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/* A helper function that looks for an argument at the start of a
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string. The argument must also either be at the end of the string,
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or be followed by whitespace. Returns 1 if it finds the argument,
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0 otherwise. If the argument is found, it updates *STR to point
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past the argument and past any whitespace following the
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argument. */
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extern int check_for_argument (const char **str, const char *arg, int arg_len);
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/* Same as above, but ARG's length is computed. */
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static inline int
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check_for_argument (const char **str, const char *arg)
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{
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return check_for_argument (str, arg, strlen (arg));
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}
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/* Same, for non-const STR. */
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static inline int
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check_for_argument (char **str, const char *arg, int arg_len)
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{
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return check_for_argument (const_cast<const char **> (str),
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arg, arg_len);
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}
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static inline int
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check_for_argument (char **str, const char *arg)
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{
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return check_for_argument (str, arg, strlen (arg));
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}
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/* qcs_flags struct groups the -q, -c, and -s flags parsed by "thread
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apply" and "frame apply" commands */
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struct qcs_flags
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{
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bool quiet = false;
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bool cont = false;
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bool silent = false;
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};
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/* Validate FLAGS. Throws an error if both FLAGS->CONT and
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FLAGS->SILENT are true. WHICH_COMMAND is included in the error
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message. */
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extern void validate_flags_qcs (const char *which_command, qcs_flags *flags);
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#endif /* CLI_CLI_UTILS_H */
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