e005d07656
Fixes #33. This PR uses cmake's interface library feature: An INTERFACE library target does not directly create build output, though it may have properties set on it and it may be installed, exported and imported. This makes it easier to include the header only library in a cmake project. After using add_subdirectory on the cxxopts directory, one simply needs to include cxxopts in their target_link_libraries, which will allow the user's target to inherit the properties of the cxxopts header library (see changes to example and test).
1422 lines
27 KiB
C++
1422 lines
27 KiB
C++
/*
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Copyright (c) 2014, 2015, 2016 Jarryd Beck
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef CXX_OPTS_HPP
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#define CXX_OPTS_HPP
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#if defined(__GNUC__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
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#endif
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#include <cstring>
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#include <exception>
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#include <iostream>
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#include <map>
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#include <memory>
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#include <regex>
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#include <sstream>
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#include <string>
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#include <unordered_set>
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#include <vector>
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//when we ask cxxopts to use Unicode, help strings are processed using ICU,
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//which results in the correct lengths being computed for strings when they
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//are formatted for the help output
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//it is necessary to make sure that <unicode/unistr.h> can be found by the
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//compiler, and that icu-uc is linked in to the binary.
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#ifdef CXXOPTS_USE_UNICODE
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#include <unicode/unistr.h>
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namespace cxxopts
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{
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typedef icu::UnicodeString String;
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inline
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String
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toLocalString(std::string s)
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{
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return icu::UnicodeString::fromUTF8(s);
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||
}
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||
|
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class UnicodeStringIterator : public
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std::iterator<std::forward_iterator_tag, int32_t>
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||
{
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public:
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||
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UnicodeStringIterator(const icu::UnicodeString* s, int32_t pos)
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: s(s)
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, i(pos)
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{
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||
}
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||
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value_type
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operator*() const
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||
{
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return s->char32At(i);
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}
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bool
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operator==(const UnicodeStringIterator& rhs) const
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||
{
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return s == rhs.s && i == rhs.i;
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}
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bool
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operator!=(const UnicodeStringIterator& rhs) const
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{
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return !(*this == rhs);
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}
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UnicodeStringIterator&
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operator++()
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{
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++i;
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return *this;
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}
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UnicodeStringIterator
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operator+(int32_t v)
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{
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return UnicodeStringIterator(s, i + v);
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}
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||
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private:
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const icu::UnicodeString* s;
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int32_t i;
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||
};
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||
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inline
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String&
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stringAppend(String&s, String a)
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{
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return s.append(std::move(a));
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}
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inline
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String&
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stringAppend(String& s, int n, UChar32 c)
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{
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for (int i = 0; i != n; ++i)
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{
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s.append(c);
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}
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return s;
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}
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template <typename Iterator>
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String&
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stringAppend(String& s, Iterator begin, Iterator end)
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{
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while (begin != end)
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{
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s.append(*begin);
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++begin;
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}
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return s;
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}
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inline
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size_t
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stringLength(const String& s)
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{
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return s.length();
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}
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inline
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std::string
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toUTF8String(const String& s)
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{
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std::string result;
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s.toUTF8String(result);
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return result;
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}
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inline
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bool
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empty(const String& s)
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{
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return s.isEmpty();
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}
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}
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namespace std
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{
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cxxopts::UnicodeStringIterator
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begin(const icu::UnicodeString& s)
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{
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return cxxopts::UnicodeStringIterator(&s, 0);
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}
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cxxopts::UnicodeStringIterator
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end(const icu::UnicodeString& s)
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{
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return cxxopts::UnicodeStringIterator(&s, s.length());
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}
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}
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//ifdef CXXOPTS_USE_UNICODE
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#else
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namespace cxxopts
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{
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typedef std::string String;
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template <typename T>
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T
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toLocalString(T&& t)
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{
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return t;
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}
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inline
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size_t
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stringLength(const String& s)
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{
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return s.length();
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}
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inline
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String&
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stringAppend(String&s, String a)
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{
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return s.append(std::move(a));
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}
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inline
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String&
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stringAppend(String& s, size_t n, char c)
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{
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return s.append(n, c);
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}
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template <typename Iterator>
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String&
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stringAppend(String& s, Iterator begin, Iterator end)
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{
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return s.append(begin, end);
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}
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template <typename T>
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std::string
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toUTF8String(T&& t)
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{
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return std::forward<T>(t);
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}
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inline
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bool
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empty(const std::string& s)
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{
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return s.empty();
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}
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}
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//ifdef CXXOPTS_USE_UNICODE
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#endif
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namespace cxxopts
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{
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class Value : public std::enable_shared_from_this<Value>
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{
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public:
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virtual void
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parse(const std::string& text) const = 0;
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virtual void
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parse() const = 0;
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virtual bool
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has_arg() const = 0;
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virtual bool
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has_default() const = 0;
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virtual bool
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is_container() const = 0;
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virtual bool
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has_implicit() const = 0;
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virtual std::string
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get_default_value() const = 0;
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virtual std::string
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get_implicit_value() const = 0;
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virtual std::shared_ptr<Value>
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default_value(const std::string& value) = 0;
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virtual std::shared_ptr<Value>
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implicit_value(const std::string& value) = 0;
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};
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class OptionException : public std::exception
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{
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public:
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OptionException(const std::string& message)
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: m_message(message)
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{
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}
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virtual const char*
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what() const noexcept
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{
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return m_message.c_str();
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}
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private:
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std::string m_message;
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};
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class OptionSpecException : public OptionException
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{
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public:
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OptionSpecException(const std::string& message)
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: OptionException(message)
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{
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}
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};
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class OptionParseException : public OptionException
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{
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public:
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OptionParseException(const std::string& message)
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: OptionException(message)
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{
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}
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};
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class option_exists_error : public OptionSpecException
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{
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public:
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option_exists_error(const std::string& option)
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: OptionSpecException(u8"Option ‘" + option + u8"’ already exists")
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{
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}
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};
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class invalid_option_format_error : public OptionSpecException
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{
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public:
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invalid_option_format_error(const std::string& format)
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: OptionSpecException(u8"Invalid option format ‘" + format + u8"’")
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{
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}
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};
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class option_not_exists_exception : public OptionParseException
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{
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public:
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option_not_exists_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ does not exist")
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{
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}
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};
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class missing_argument_exception : public OptionParseException
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{
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public:
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missing_argument_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ is missing an argument")
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{
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}
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};
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class option_requires_argument_exception : public OptionParseException
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{
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public:
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option_requires_argument_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ requires an argument")
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{
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}
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};
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class option_not_has_argument_exception : public OptionParseException
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{
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public:
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option_not_has_argument_exception
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(
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const std::string& option,
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const std::string& arg
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)
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: OptionParseException(
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u8"Option ‘" + option + u8"’ does not take an argument, but argument‘"
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+ arg + "’ given")
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{
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}
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};
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class option_not_present_exception : public OptionParseException
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{
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public:
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option_not_present_exception(const std::string& option)
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: OptionParseException(u8"Option ‘" + option + u8"’ not present")
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{
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}
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};
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class argument_incorrect_type : public OptionParseException
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{
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public:
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argument_incorrect_type
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(
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const std::string& arg
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)
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: OptionParseException(
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u8"Argument ‘" + arg + u8"’ failed to parse"
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)
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{
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}
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};
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||
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namespace values
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||
{
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template <typename T>
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void
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parse_value(const std::string& text, T& value)
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{
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std::istringstream is(text);
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if (!(is >> value))
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{
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throw argument_incorrect_type(text);
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}
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||
|
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if (is.rdbuf()->in_avail() != 0)
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{
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throw argument_incorrect_type(text);
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}
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}
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|
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inline
|
||
void
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parse_value(const std::string& /*text*/, bool& value)
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{
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//TODO recognise on, off, yes, no, enable, disable
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//so that we can write --long=yes explicitly
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value = true;
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}
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|
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inline
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||
void
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parse_value(const std::string& text, std::string& value)
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{
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value = text;
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||
}
|
||
|
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template <typename T>
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||
void
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parse_value(const std::string& text, std::vector<T>& value)
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||
{
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T v;
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parse_value(text, v);
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value.push_back(v);
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}
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||
|
||
template <typename T>
|
||
struct value_has_arg
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||
{
|
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static constexpr bool value = true;
|
||
};
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||
|
||
template <>
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||
struct value_has_arg<bool>
|
||
{
|
||
static constexpr bool value = false;
|
||
};
|
||
|
||
template <typename T>
|
||
struct type_is_container
|
||
{
|
||
static constexpr bool value = false;
|
||
};
|
||
|
||
template <typename T>
|
||
struct type_is_container<std::vector<T>>
|
||
{
|
||
static constexpr bool value = true;
|
||
};
|
||
|
||
template <typename T>
|
||
class standard_value : public Value
|
||
{
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||
public:
|
||
standard_value()
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||
: m_result(std::make_shared<T>())
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||
, m_store(m_result.get())
|
||
{
|
||
}
|
||
|
||
standard_value(T* t)
|
||
: m_store(t)
|
||
{
|
||
}
|
||
|
||
void
|
||
parse(const std::string& text) const
|
||
{
|
||
if (m_implicit && text.empty())
|
||
{
|
||
parse_value(m_implicit_value, *m_store);
|
||
}
|
||
else
|
||
{
|
||
parse_value(text, *m_store);
|
||
}
|
||
}
|
||
|
||
bool
|
||
is_container() const
|
||
{
|
||
return type_is_container<T>::value;
|
||
}
|
||
|
||
void
|
||
parse() const
|
||
{
|
||
parse_value(m_default_value, *m_store);
|
||
}
|
||
|
||
bool
|
||
has_arg() const
|
||
{
|
||
return value_has_arg<T>::value;
|
||
}
|
||
|
||
bool
|
||
has_default() const
|
||
{
|
||
return m_default;
|
||
}
|
||
|
||
bool
|
||
has_implicit() const
|
||
{
|
||
return m_implicit;
|
||
}
|
||
|
||
virtual std::shared_ptr<Value>
|
||
default_value(const std::string& value){
|
||
m_default = true;
|
||
m_default_value = value;
|
||
return shared_from_this();
|
||
}
|
||
|
||
virtual std::shared_ptr<Value>
|
||
implicit_value(const std::string& value){
|
||
m_implicit = true;
|
||
m_implicit_value = value;
|
||
return shared_from_this();
|
||
}
|
||
|
||
std::string
|
||
get_default_value() const
|
||
{
|
||
return m_default_value;
|
||
}
|
||
|
||
std::string
|
||
get_implicit_value() const
|
||
{
|
||
return m_implicit_value;
|
||
}
|
||
|
||
const T&
|
||
get() const
|
||
{
|
||
if (m_store == nullptr)
|
||
{
|
||
return *m_result;
|
||
}
|
||
else
|
||
{
|
||
return *m_store;
|
||
}
|
||
}
|
||
|
||
protected:
|
||
std::shared_ptr<T> m_result;
|
||
T* m_store;
|
||
bool m_default = false;
|
||
std::string m_default_value;
|
||
bool m_implicit = false;
|
||
std::string m_implicit_value;
|
||
};
|
||
}
|
||
|
||
template <typename T>
|
||
std::shared_ptr<Value>
|
||
value()
|
||
{
|
||
return std::make_shared<values::standard_value<T>>();
|
||
}
|
||
|
||
template <typename T>
|
||
std::shared_ptr<Value>
|
||
value(T& t)
|
||
{
|
||
return std::make_shared<values::standard_value<T>>(&t);
|
||
}
|
||
|
||
class OptionAdder;
|
||
|
||
class OptionDetails
|
||
{
|
||
public:
|
||
OptionDetails
|
||
(
|
||
const String& description,
|
||
std::shared_ptr<const Value> value
|
||
)
|
||
: m_desc(description)
|
||
, m_value(value)
|
||
, m_count(0)
|
||
{
|
||
}
|
||
|
||
const String&
|
||
description() const
|
||
{
|
||
return m_desc;
|
||
}
|
||
|
||
bool
|
||
has_arg() const
|
||
{
|
||
return m_value->has_arg();
|
||
}
|
||
|
||
void
|
||
parse(const std::string& text)
|
||
{
|
||
m_value->parse(text);
|
||
++m_count;
|
||
}
|
||
|
||
void
|
||
parse_default()
|
||
{
|
||
m_value->parse();
|
||
}
|
||
|
||
int
|
||
count() const
|
||
{
|
||
return m_count;
|
||
}
|
||
|
||
const Value& value() const {
|
||
return *m_value;
|
||
}
|
||
|
||
template <typename T>
|
||
const T&
|
||
as() const
|
||
{
|
||
#ifdef CXXOPTS_NO_RTTI
|
||
return static_cast<const values::standard_value<T>&>(*m_value).get();
|
||
#else
|
||
return dynamic_cast<const values::standard_value<T>&>(*m_value).get();
|
||
#endif
|
||
}
|
||
|
||
private:
|
||
String m_desc;
|
||
std::shared_ptr<const Value> m_value;
|
||
int m_count;
|
||
};
|
||
|
||
struct HelpOptionDetails
|
||
{
|
||
std::string s;
|
||
std::string l;
|
||
String desc;
|
||
bool has_arg;
|
||
bool has_default;
|
||
std::string default_value;
|
||
bool has_implicit;
|
||
std::string implicit_value;
|
||
std::string arg_help;
|
||
bool is_container;
|
||
};
|
||
|
||
struct HelpGroupDetails
|
||
{
|
||
std::string name;
|
||
std::string description;
|
||
std::vector<HelpOptionDetails> options;
|
||
};
|
||
|
||
class Options
|
||
{
|
||
public:
|
||
|
||
Options(std::string program, std::string help_string = "")
|
||
: m_program(std::move(program))
|
||
, m_help_string(toLocalString(std::move(help_string)))
|
||
, m_next_positional(m_positional.end())
|
||
{
|
||
}
|
||
|
||
inline
|
||
void
|
||
parse(int& argc, char**& argv);
|
||
|
||
inline
|
||
OptionAdder
|
||
add_options(std::string group = "");
|
||
|
||
inline
|
||
void
|
||
add_option
|
||
(
|
||
const std::string& group,
|
||
const std::string& s,
|
||
const std::string& l,
|
||
std::string desc,
|
||
std::shared_ptr<const Value> value,
|
||
std::string arg_help
|
||
);
|
||
|
||
int
|
||
count(const std::string& o) const
|
||
{
|
||
auto iter = m_options.find(o);
|
||
if (iter == m_options.end())
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
return iter->second->count();
|
||
}
|
||
|
||
const OptionDetails&
|
||
operator[](const std::string& option) const
|
||
{
|
||
auto iter = m_options.find(option);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_present_exception(option);
|
||
}
|
||
|
||
return *iter->second;
|
||
}
|
||
|
||
//parse positional arguments into the given option
|
||
inline
|
||
void
|
||
parse_positional(std::string option);
|
||
|
||
inline
|
||
void
|
||
parse_positional(std::vector<std::string> options);
|
||
|
||
inline
|
||
std::string
|
||
help(const std::vector<std::string>& groups = {""}) const;
|
||
|
||
inline
|
||
const std::vector<std::string>
|
||
groups() const;
|
||
|
||
inline
|
||
const HelpGroupDetails&
|
||
group_help(const std::string& group) const;
|
||
|
||
private:
|
||
|
||
inline
|
||
void
|
||
add_one_option
|
||
(
|
||
const std::string& option,
|
||
std::shared_ptr<OptionDetails> details
|
||
);
|
||
|
||
inline
|
||
bool
|
||
consume_positional(std::string a);
|
||
|
||
inline
|
||
void
|
||
add_to_option(const std::string& option, const std::string& arg);
|
||
|
||
inline
|
||
void
|
||
parse_option
|
||
(
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& name,
|
||
const std::string& arg = ""
|
||
);
|
||
|
||
inline
|
||
void
|
||
checked_parse_arg
|
||
(
|
||
int argc,
|
||
char* argv[],
|
||
int& current,
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& name
|
||
);
|
||
|
||
inline
|
||
String
|
||
help_one_group(const std::string& group) const;
|
||
|
||
std::string m_program;
|
||
String m_help_string;
|
||
|
||
std::map<std::string, std::shared_ptr<OptionDetails>> m_options;
|
||
std::vector<std::string> m_positional;
|
||
std::vector<std::string>::iterator m_next_positional;
|
||
std::unordered_set<std::string> m_positional_set;
|
||
|
||
//mapping from groups to help options
|
||
std::map<std::string, HelpGroupDetails> m_help;
|
||
};
|
||
|
||
class OptionAdder
|
||
{
|
||
public:
|
||
|
||
OptionAdder(Options& options, std::string group)
|
||
: m_options(options), m_group(std::move(group))
|
||
{
|
||
}
|
||
|
||
inline
|
||
OptionAdder&
|
||
operator()
|
||
(
|
||
const std::string& opts,
|
||
const std::string& desc,
|
||
std::shared_ptr<const Value> value
|
||
= ::cxxopts::value<bool>(),
|
||
std::string arg_help = ""
|
||
);
|
||
|
||
private:
|
||
Options& m_options;
|
||
std::string m_group;
|
||
};
|
||
|
||
}
|
||
|
||
namespace cxxopts
|
||
{
|
||
|
||
namespace
|
||
{
|
||
|
||
constexpr int OPTION_LONGEST = 30;
|
||
constexpr int OPTION_DESC_GAP = 2;
|
||
|
||
std::basic_regex<char> option_matcher
|
||
("--([[:alnum:]][-_[:alnum:]]+)(=(.*))?|-([[:alnum:]]+)");
|
||
|
||
std::basic_regex<char> option_specifier
|
||
("(([[:alnum:]]),)?([[:alnum:]][-_[:alnum:]]+)");
|
||
|
||
String
|
||
format_option
|
||
(
|
||
const HelpOptionDetails& o
|
||
)
|
||
{
|
||
auto& s = o.s;
|
||
auto& l = o.l;
|
||
|
||
String result = " ";
|
||
|
||
if (s.size() > 0)
|
||
{
|
||
result += "-" + toLocalString(s) + ",";
|
||
}
|
||
else
|
||
{
|
||
result += " ";
|
||
}
|
||
|
||
if (l.size() > 0)
|
||
{
|
||
result += " --" + toLocalString(l);
|
||
}
|
||
|
||
if (o.has_arg)
|
||
{
|
||
auto arg = o.arg_help.size() > 0 ? toLocalString(o.arg_help) : "arg";
|
||
|
||
if (o.has_implicit)
|
||
{
|
||
result += " [=" + arg + "(=" + toLocalString(o.implicit_value) + ")]";
|
||
}
|
||
else
|
||
{
|
||
result += " " + arg;
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
String
|
||
format_description
|
||
(
|
||
const HelpOptionDetails& o,
|
||
size_t start,
|
||
size_t width
|
||
)
|
||
{
|
||
auto desc = o.desc;
|
||
|
||
if (o.has_default)
|
||
{
|
||
desc += toLocalString(" (default: " + o.default_value + ")");
|
||
}
|
||
|
||
String result;
|
||
|
||
auto current = std::begin(desc);
|
||
auto startLine = current;
|
||
auto lastSpace = current;
|
||
|
||
auto size = size_t{};
|
||
|
||
while (current != std::end(desc))
|
||
{
|
||
if (*current == ' ')
|
||
{
|
||
lastSpace = current;
|
||
}
|
||
|
||
if (size > width)
|
||
{
|
||
if (lastSpace == startLine)
|
||
{
|
||
stringAppend(result, startLine, current + 1);
|
||
stringAppend(result, "\n");
|
||
stringAppend(result, start, ' ');
|
||
startLine = current + 1;
|
||
lastSpace = startLine;
|
||
}
|
||
else
|
||
{
|
||
stringAppend(result, startLine, lastSpace);
|
||
stringAppend(result, "\n");
|
||
stringAppend(result, start, ' ');
|
||
startLine = lastSpace + 1;
|
||
}
|
||
size = 0;
|
||
}
|
||
else
|
||
{
|
||
++size;
|
||
}
|
||
|
||
++current;
|
||
}
|
||
|
||
//append whatever is left
|
||
stringAppend(result, startLine, current);
|
||
|
||
return result;
|
||
}
|
||
}
|
||
|
||
OptionAdder
|
||
Options::add_options(std::string group)
|
||
{
|
||
return OptionAdder(*this, std::move(group));
|
||
}
|
||
|
||
OptionAdder&
|
||
OptionAdder::operator()
|
||
(
|
||
const std::string& opts,
|
||
const std::string& desc,
|
||
std::shared_ptr<const Value> value,
|
||
std::string arg_help
|
||
)
|
||
{
|
||
std::match_results<const char*> result;
|
||
std::regex_match(opts.c_str(), result, option_specifier);
|
||
|
||
if (result.empty())
|
||
{
|
||
throw invalid_option_format_error(opts);
|
||
}
|
||
|
||
const auto& s = result[2];
|
||
const auto& l = result[3];
|
||
|
||
m_options.add_option(m_group, s.str(), l.str(), desc, value,
|
||
std::move(arg_help));
|
||
|
||
return *this;
|
||
}
|
||
|
||
void
|
||
Options::parse_option
|
||
(
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& /*name*/,
|
||
const std::string& arg
|
||
)
|
||
{
|
||
value->parse(arg);
|
||
}
|
||
|
||
void
|
||
Options::checked_parse_arg
|
||
(
|
||
int argc,
|
||
char* argv[],
|
||
int& current,
|
||
std::shared_ptr<OptionDetails> value,
|
||
const std::string& name
|
||
)
|
||
{
|
||
if (current + 1 >= argc)
|
||
{
|
||
if (value->value().has_implicit())
|
||
{
|
||
parse_option(value, name, "");
|
||
}
|
||
else
|
||
{
|
||
throw missing_argument_exception(name);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (argv[current + 1][0] == '-' && value->value().has_implicit())
|
||
{
|
||
parse_option(value, name, "");
|
||
}
|
||
else
|
||
{
|
||
parse_option(value, name, argv[current + 1]);
|
||
++current;
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
Options::add_to_option(const std::string& option, const std::string& arg)
|
||
{
|
||
auto iter = m_options.find(option);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_exists_exception(option);
|
||
}
|
||
|
||
parse_option(iter->second, option, arg);
|
||
}
|
||
|
||
bool
|
||
Options::consume_positional(std::string a)
|
||
{
|
||
while (m_next_positional != m_positional.end())
|
||
{
|
||
auto iter = m_options.find(*m_next_positional);
|
||
if (iter != m_options.end())
|
||
{
|
||
if (!iter->second->value().is_container())
|
||
{
|
||
if (iter->second->count() == 0)
|
||
{
|
||
add_to_option(*m_next_positional, a);
|
||
++m_next_positional;
|
||
return true;
|
||
}
|
||
else
|
||
{
|
||
++m_next_positional;
|
||
continue;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
add_to_option(*m_next_positional, a);
|
||
return true;
|
||
}
|
||
}
|
||
++m_next_positional;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
void
|
||
Options::parse_positional(std::string option)
|
||
{
|
||
parse_positional(std::vector<std::string>{option});
|
||
}
|
||
|
||
void
|
||
Options::parse_positional(std::vector<std::string> options)
|
||
{
|
||
m_positional = std::move(options);
|
||
m_next_positional = m_positional.begin();
|
||
|
||
m_positional_set.insert(m_positional.begin(), m_positional.end());
|
||
}
|
||
|
||
void
|
||
Options::parse(int& argc, char**& argv)
|
||
{
|
||
int current = 1;
|
||
|
||
int nextKeep = 1;
|
||
|
||
bool consume_remaining = false;
|
||
|
||
while (current != argc)
|
||
{
|
||
if (strcmp(argv[current], "--") == 0)
|
||
{
|
||
consume_remaining = true;
|
||
++current;
|
||
break;
|
||
}
|
||
|
||
std::match_results<const char*> result;
|
||
std::regex_match(argv[current], result, option_matcher);
|
||
|
||
if (result.empty())
|
||
{
|
||
//not a flag
|
||
|
||
//if true is returned here then it was consumed, otherwise it is
|
||
//ignored
|
||
if (consume_positional(argv[current]))
|
||
{
|
||
}
|
||
else
|
||
{
|
||
argv[nextKeep] = argv[current];
|
||
++nextKeep;
|
||
}
|
||
//if we return from here then it was parsed successfully, so continue
|
||
}
|
||
else
|
||
{
|
||
//short or long option?
|
||
if (result[4].length() != 0)
|
||
{
|
||
const std::string& s = result[4];
|
||
|
||
for (std::size_t i = 0; i != s.size(); ++i)
|
||
{
|
||
std::string name(1, s[i]);
|
||
auto iter = m_options.find(name);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_exists_exception(name);
|
||
}
|
||
|
||
auto value = iter->second;
|
||
|
||
//if no argument then just add it
|
||
if (!value->has_arg())
|
||
{
|
||
parse_option(value, name);
|
||
}
|
||
else
|
||
{
|
||
//it must be the last argument
|
||
if (i + 1 == s.size())
|
||
{
|
||
checked_parse_arg(argc, argv, current, value, name);
|
||
}
|
||
else if (value->value().has_implicit())
|
||
{
|
||
parse_option(value, name, "");
|
||
}
|
||
else
|
||
{
|
||
//error
|
||
throw option_requires_argument_exception(name);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else if (result[1].length() != 0)
|
||
{
|
||
const std::string& name = result[1];
|
||
|
||
auto iter = m_options.find(name);
|
||
|
||
if (iter == m_options.end())
|
||
{
|
||
throw option_not_exists_exception(name);
|
||
}
|
||
|
||
auto opt = iter->second;
|
||
|
||
//equals provided for long option?
|
||
if (result[3].length() != 0)
|
||
{
|
||
//parse the option given
|
||
|
||
//but if it doesn't take an argument, this is an error
|
||
if (!opt->has_arg())
|
||
{
|
||
throw option_not_has_argument_exception(name, result[3]);
|
||
}
|
||
|
||
parse_option(opt, name, result[3]);
|
||
}
|
||
else
|
||
{
|
||
if (opt->has_arg())
|
||
{
|
||
//parse the next argument
|
||
checked_parse_arg(argc, argv, current, opt, name);
|
||
}
|
||
else
|
||
{
|
||
//parse with empty argument
|
||
parse_option(opt, name);
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
++current;
|
||
}
|
||
|
||
for (auto& opt : m_options)
|
||
{
|
||
auto& detail = opt.second;
|
||
auto& value = detail->value();
|
||
|
||
if(!detail->count() && value.has_default()){
|
||
detail->parse_default();
|
||
}
|
||
}
|
||
|
||
if (consume_remaining)
|
||
{
|
||
while (current < argc)
|
||
{
|
||
consume_positional(argv[current]);
|
||
++current;
|
||
}
|
||
}
|
||
|
||
argc = nextKeep;
|
||
|
||
}
|
||
|
||
void
|
||
Options::add_option
|
||
(
|
||
const std::string& group,
|
||
const std::string& s,
|
||
const std::string& l,
|
||
std::string desc,
|
||
std::shared_ptr<const Value> value,
|
||
std::string arg_help
|
||
)
|
||
{
|
||
auto stringDesc = toLocalString(std::move(desc));
|
||
auto option = std::make_shared<OptionDetails>(stringDesc, value);
|
||
|
||
if (s.size() > 0)
|
||
{
|
||
add_one_option(s, option);
|
||
}
|
||
|
||
if (l.size() > 0)
|
||
{
|
||
add_one_option(l, option);
|
||
}
|
||
|
||
//add the help details
|
||
auto& options = m_help[group];
|
||
|
||
options.options.emplace_back(HelpOptionDetails{s, l, stringDesc,
|
||
value->has_arg(),
|
||
value->has_default(), value->get_default_value(),
|
||
value->has_implicit(), value->get_implicit_value(),
|
||
std::move(arg_help),
|
||
value->is_container()});
|
||
}
|
||
|
||
void
|
||
Options::add_one_option
|
||
(
|
||
const std::string& option,
|
||
std::shared_ptr<OptionDetails> details
|
||
)
|
||
{
|
||
auto in = m_options.emplace(option, details);
|
||
|
||
if (!in.second)
|
||
{
|
||
throw option_exists_error(option);
|
||
}
|
||
}
|
||
|
||
String
|
||
Options::help_one_group(const std::string& g) const
|
||
{
|
||
typedef std::vector<std::pair<String, String>> OptionHelp;
|
||
|
||
auto group = m_help.find(g);
|
||
if (group == m_help.end())
|
||
{
|
||
return "";
|
||
}
|
||
|
||
OptionHelp format;
|
||
|
||
size_t longest = 0;
|
||
|
||
String result;
|
||
|
||
if (!g.empty())
|
||
{
|
||
result += toLocalString(" " + g + " options:\n");
|
||
}
|
||
|
||
for (const auto& o : group->second.options)
|
||
{
|
||
if (o.is_container && m_positional_set.find(o.l) != m_positional_set.end())
|
||
{
|
||
continue;
|
||
}
|
||
|
||
auto s = format_option(o);
|
||
longest = std::max(longest, stringLength(s));
|
||
format.push_back(std::make_pair(s, String()));
|
||
}
|
||
|
||
longest = std::min(longest, static_cast<size_t>(OPTION_LONGEST));
|
||
|
||
//widest allowed description
|
||
auto allowed = size_t{76} - longest - OPTION_DESC_GAP;
|
||
|
||
auto fiter = format.begin();
|
||
for (const auto& o : group->second.options)
|
||
{
|
||
if (o.is_container && m_positional_set.find(o.l) != m_positional_set.end())
|
||
{
|
||
continue;
|
||
}
|
||
|
||
auto d = format_description(o, longest + OPTION_DESC_GAP, allowed);
|
||
|
||
result += fiter->first;
|
||
if (stringLength(fiter->first) > longest)
|
||
{
|
||
result += '\n';
|
||
result += toLocalString(std::string(longest + OPTION_DESC_GAP, ' '));
|
||
}
|
||
else
|
||
{
|
||
result += toLocalString(std::string(longest + OPTION_DESC_GAP -
|
||
stringLength(fiter->first),
|
||
' '));
|
||
}
|
||
result += d;
|
||
result += '\n';
|
||
|
||
++fiter;
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
std::string
|
||
Options::help(const std::vector<std::string>& groups) const
|
||
{
|
||
String result = m_help_string + "\nUsage:\n " +
|
||
toLocalString(m_program) + " [OPTION...]";
|
||
|
||
if (m_positional.size() > 0) {
|
||
result += " positional parameters";
|
||
}
|
||
|
||
result += "\n\n";
|
||
|
||
for (std::size_t i = 0; i < groups.size(); ++i)
|
||
{
|
||
String const& group_help = help_one_group(groups[i]);
|
||
if (empty(group_help)) continue;
|
||
result += group_help;
|
||
if (i < groups.size() - 1)
|
||
{
|
||
result += '\n';
|
||
}
|
||
}
|
||
|
||
return toUTF8String(result);
|
||
}
|
||
|
||
const std::vector<std::string>
|
||
Options::groups() const
|
||
{
|
||
std::vector<std::string> g;
|
||
|
||
std::transform(
|
||
m_help.begin(),
|
||
m_help.end(),
|
||
std::back_inserter(g),
|
||
[] (const std::map<std::string, HelpGroupDetails>::value_type& pair)
|
||
{
|
||
return pair.first;
|
||
}
|
||
);
|
||
|
||
return g;
|
||
}
|
||
|
||
const HelpGroupDetails&
|
||
Options::group_help(const std::string& group) const
|
||
{
|
||
return m_help.at(group);
|
||
}
|
||
|
||
}
|
||
|
||
#if defined(__GNU__)
|
||
#pragma GCC diagnostic pop
|
||
#endif
|
||
|
||
#endif //CXX_OPTS_HPP
|