validator_length.cpp

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// Copyright (c) 2006-2025  Made to Order Software Corp.  All Rights Reserved
//
// https://snapwebsites.org/project/advgetopt
// contact@m2osw.com
//
// 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 2 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, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
// self
//
#include    "advgetopt/validator_length.h"
 
#include    "advgetopt/validator_integer.h"
 
 
// cppthread
//
#include    <cppthread/log.h>
 
 
// libutf8
//
#include    <libutf8/libutf8.h>
 
 
// snapdev
//
#include    <snapdev/trim_string.h>
 
 
// last include
//
#include    <snapdev/poison.h>
 
 
 
 
namespace advgetopt
{
 
 
 
namespace
{
 
 
 
class validator_length_factory
    : public validator_factory
{
public:
    validator_length_factory()
    {
        validator::register_validator(*this);
    }
 
    virtual std::string get_name() const override
    {
        return std::string("length");
    }
 
    virtual std::shared_ptr<validator> create(string_list_t const & data) const override
    {
        return std::make_shared<validator_length>(data);
    }
};
 
validator_length_factory         g_validator_length_factory;
 
 
 
} // no name namespace
 
 
 
 
 
validator_length::validator_length(string_list_t const & length_list)
{
    range_t range;
    for(auto r : length_list)
    {
        std::string::size_type const pos(r.find("..."));
        if(pos == std::string::npos)
        {
            if(!validator_integer::convert_string(r, range.f_minimum))
            {
                cppthread::log << cppthread::log_level_t::error
                               << r
                               << " is not a valid standalone value for your ranges;"
                                  " it must only be digits, optionally preceeded by a sign (+ or -)"
                                  " and not overflow an int64_t value."
                               << cppthread::end;
                continue;
            }
            range.f_maximum = range.f_minimum;
        }
        else
        {
            std::string const min_value(snapdev::trim_string(r.substr(0, pos)));
            if(!min_value.empty())
            {
                if(!validator_integer::convert_string(min_value, range.f_minimum))
                {
                    cppthread::log << cppthread::log_level_t::error
                                   << min_value
                                   << " is not a valid value for your range's start;"
                                      " it must only be digits, optionally preceeded by a sign (+ or -)"
                                      " and not overflow an int64_t value."
                                   << cppthread::end;
                    continue;
                }
            }
 
            std::string const max_value(snapdev::trim_string(r.substr(pos + 3)));
            if(!max_value.empty())
            {
                if(!validator_integer::convert_string(max_value, range.f_maximum))
                {
                    cppthread::log << cppthread::log_level_t::error
                                   << max_value
                                   << " is not a valid value for your range's end;"
                                      " it must only be digits, optionally preceeded by a sign (+ or -)"
                                      " and not overflow an int64_t value."
                                   << cppthread::end;
                    continue;
                }
            }
 
            if(range.f_minimum > range.f_maximum)
            {
                cppthread::log << cppthread::log_level_t::error
                               << min_value
                               << " has to be smaller or equal to "
                               << max_value
                               << "; you have an invalid range."
                               << cppthread::end;
                continue;
            }
        }
        f_allowed_lengths.push_back(range);
    }
}
 
 
std::string validator_length::name() const
{
    return std::string("length");
}
 
 
bool validator_length::validate(std::string const & value) const
{
    if(f_allowed_lengths.empty())
    {
        return true;
    }
 
    // get the number of characters assuming the input string is UTF-8
    //
    std::int64_t const length(static_cast<std::int64_t>(libutf8::u8length(value)));
    for(auto f : f_allowed_lengths)
    {
        if(length >= f.f_minimum
        && length <= f.f_maximum)
        {
            return true;
        }
    }
    return false;
}
 
 
 
} // namespace advgetopt
// vim: ts=4 sw=4 et