<?php

namespace {
    /*
     * This file is part of the Symfony package.
     *
     * (c) Fabien Potencier <fabien@symfony.com>
     *
     * For the full copyright and license information, please view the LICENSE
     * file that was distributed with this source code.
     */
    use Symfony\Polyfill\Iconv as p;
    if (!\defined('ICONV_IMPL')) {
        \define('ICONV_IMPL', 'Symfony');
    }
    if (!\defined('ICONV_VERSION')) {
        \define('ICONV_VERSION', '1.0');
    }
    if (!\defined('ICONV_MIME_DECODE_STRICT')) {
        \define('ICONV_MIME_DECODE_STRICT', 1);
    }
    if (!\defined('ICONV_MIME_DECODE_CONTINUE_ON_ERROR')) {
        \define('ICONV_MIME_DECODE_CONTINUE_ON_ERROR', 2);
    }
    if (!\function_exists('iconv')) {
        function iconv(?string $from_encoding, ?string $to_encoding, ?string $string) : string|false
        {
            return p\Iconv::iconv((string) $from_encoding, (string) $to_encoding, (string) $string);
        }
    }
    if (!\function_exists('iconv_get_encoding')) {
        function iconv_get_encoding(?string $type = 'all') : array|string|false
        {
            return p\Iconv::iconv_get_encoding((string) $type);
        }
    }
    if (!\function_exists('iconv_set_encoding')) {
        function iconv_set_encoding(?string $type, ?string $encoding) : bool
        {
            return p\Iconv::iconv_set_encoding((string) $type, (string) $encoding);
        }
    }
    if (!\function_exists('iconv_mime_encode')) {
        function iconv_mime_encode(?string $field_name, ?string $field_value, ?array $options = []) : string|false
        {
            return p\Iconv::iconv_mime_encode((string) $field_name, (string) $field_value, (array) $options);
        }
    }
    if (!\function_exists('iconv_mime_decode_headers')) {
        function iconv_mime_decode_headers(?string $headers, ?int $mode = 0, ?string $encoding = null) : array|false
        {
            return p\Iconv::iconv_mime_decode_headers((string) $headers, (int) $mode, $encoding);
        }
    }
    if (\extension_loaded('mbstring')) {
        if (!\function_exists('iconv_strlen')) {
            function iconv_strlen(?string $string, ?string $encoding = null) : int|false
            {
                null === $encoding && ($encoding = p\Iconv::$internalEncoding);
                return \mb_strlen((string) $string, $encoding);
            }
        }
        if (!\function_exists('iconv_strpos')) {
            function iconv_strpos(?string $haystack, ?string $needle, ?int $offset = 0, ?string $encoding = null) : int|false
            {
                null === $encoding && ($encoding = p\Iconv::$internalEncoding);
                return \mb_strpos((string) $haystack, (string) $needle, (int) $offset, $encoding);
            }
        }
        if (!\function_exists('iconv_strrpos')) {
            function iconv_strrpos(?string $haystack, ?string $needle, ?string $encoding = null) : int|false
            {
                null === $encoding && ($encoding = p\Iconv::$internalEncoding);
                return \mb_strrpos((string) $haystack, (string) $needle, 0, $encoding);
            }
        }
        if (!\function_exists('iconv_substr')) {
            function iconv_substr(?string $string, ?int $offset, ?int $length = null, ?string $encoding = null) : string|false
            {
                null === $encoding && ($encoding = p\Iconv::$internalEncoding);
                return \mb_substr((string) $string, (int) $offset, $length, $encoding);
            }
        }
        if (!\function_exists('iconv_mime_decode')) {
            function iconv_mime_decode($string, $mode = 0, $encoding = null)
            {
                $currentMbEncoding = \mb_internal_encoding();
                null === $encoding && ($encoding = p\Iconv::$internalEncoding);
                \mb_internal_encoding($encoding);
                $decoded = \mb_decode_mimeheader($string);
                \mb_internal_encoding($currentMbEncoding);
                return $decoded;
            }
        }
    } else {
        if (!\function_exists('iconv_strlen')) {
            function iconv_strlen(?string $string, ?string $encoding = null) : int|false
            {
                return p\Iconv::iconv_strlen((string) $string, $encoding);
            }
        }
        if (!\function_exists('iconv_strpos')) {
            function iconv_strpos(?string $haystack, ?string $needle, ?int $offset = 0, ?string $encoding = null) : int|false
            {
                return p\Iconv::iconv_strpos((string) $haystack, (string) $needle, (int) $offset, $encoding);
            }
        }
        if (!\function_exists('iconv_strrpos')) {
            function iconv_strrpos(?string $haystack, ?string $needle, ?string $encoding = null) : int|false
            {
                return p\Iconv::iconv_strrpos((string) $haystack, (string) $needle, $encoding);
            }
        }
        if (!\function_exists('iconv_substr')) {
            function iconv_substr(?string $string, ?int $offset, ?int $length = null, ?string $encoding = null) : string|false
            {
                return p\Iconv::iconv_substr((string) $string, (string) $offset, $length, $encoding);
            }
        }
        if (!\function_exists('iconv_mime_decode')) {
            function iconv_mime_decode(?string $string, ?int $mode = 0, ?string $encoding = null) : string|false
            {
                return p\Iconv::iconv_mime_decode((string) $string, (int) $mode, $encoding);
            }
        }
    }
}