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authorDaniel Baumann <mail@daniel-baumann.ch>2015-11-07 13:46:00 +0000
committerDaniel Baumann <mail@daniel-baumann.ch>2015-11-07 13:46:00 +0000
commit4b2126b14346d29e15ddd4867930e96c857e168c (patch)
tree5d7d29e06e931313b47e55c2baf16914efdd62e5 /arg_parser.h
parentAdding debian version 1.2-1. (diff)
downloadlzlib-4b2126b14346d29e15ddd4867930e96c857e168c.tar.xz
lzlib-4b2126b14346d29e15ddd4867930e96c857e168c.zip
Merging upstream version 1.3.
Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>
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-/* Arg_parser - POSIX/GNU command line argument parser. (C++ version)
- Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Antonio Diaz Diaz.
-
- This library 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 library 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 library. If not, see <http://www.gnu.org/licenses/>.
-
- As a special exception, you may use this file as part of a free
- software library without restriction. Specifically, if other files
- instantiate templates or use macros or inline functions from this
- file, or you compile this file and link it with other files to
- produce an executable, this file does not by itself cause the
- resulting executable to be covered by the GNU General Public
- License. This exception does not however invalidate any other
- reasons why the executable file might be covered by the GNU General
- Public License.
-*/
-
-/* Arg_parser reads the arguments in `argv' and creates a number of
- option codes, option arguments and non-option arguments.
-
- In case of error, `error' returns a non-empty error message.
-
- `options' is an array of `struct Option' terminated by an element
- containing a code which is zero. A null name means a short-only
- option. A code value outside the unsigned char range means a
- long-only option.
-
- Arg_parser normally makes it appear as if all the option arguments
- were specified before all the non-option arguments for the purposes
- of parsing, even if the user of your program intermixed option and
- non-option arguments. If you want the arguments in the exact order
- the user typed them, call `Arg_parser' with `in_order' = true.
-
- The argument `--' terminates all options; any following arguments are
- treated as non-option arguments, even if they begin with a hyphen.
-
- The syntax for optional option arguments is `-<short_option><argument>'
- (without whitespace), or `--<long_option>=<argument>'.
-*/
-
-class Arg_parser
- {
-public:
- enum Has_arg { no, yes, maybe };
-
- struct Option
- {
- int code; // Short option letter or code ( code != 0 )
- const char * name; // Long option name (maybe null)
- Has_arg has_arg;
- };
-
-private:
- struct Record
- {
- int code;
- std::string argument;
- Record( const int c = 0 ) : code( c ) {}
- };
-
- std::string error_;
- std::vector< Record > data;
-
- bool parse_long_option( const char * const opt, const char * const arg,
- const Option options[], int & argind );
- bool parse_short_option( const char * const opt, const char * const arg,
- const Option options[], int & argind );
-
-public:
- Arg_parser( const int argc, const char * const argv[],
- const Option options[], const bool in_order = false );
-
- // Restricted constructor. Parses a single token and argument (if any)
- Arg_parser( const char * const opt, const char * const arg,
- const Option options[] );
-
- const std::string & error() const throw() { return error_; }
-
- // The number of arguments parsed (may be different from argc)
- int arguments() const throw() { return data.size(); }
-
- // If code( i ) is 0, argument( i ) is a non-option.
- // Else argument( i ) is the option's argument (or empty).
- int code( const int i ) const throw()
- {
- if( i >= 0 && i < arguments() ) return data[i].code;
- else return 0;
- }
-
- const std::string & argument( const int i ) const throw()
- {
- if( i >= 0 && i < arguments() ) return data[i].argument;
- else return error_;
- }
- };