diff options
Diffstat (limited to 'vendor/symfony/mime/CharacterStream.php')
| -rw-r--r-- | vendor/symfony/mime/CharacterStream.php | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/vendor/symfony/mime/CharacterStream.php b/vendor/symfony/mime/CharacterStream.php new file mode 100644 index 0000000000..9b80b2efa4 --- /dev/null +++ b/vendor/symfony/mime/CharacterStream.php @@ -0,0 +1,224 @@ +<?php + +/* + * 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. + */ + +namespace Symfony\Component\Mime; + +/** + * @author Fabien Potencier <fabien@symfony.com> + * @author Xavier De Cock <xdecock@gmail.com> + * + * @internal + * + * @experimental in 4.3 + */ +final class CharacterStream +{ + /** Pre-computed for optimization */ + private const UTF8_LENGTH_MAP = [ + "\x00" => 1, "\x01" => 1, "\x02" => 1, "\x03" => 1, "\x04" => 1, "\x05" => 1, "\x06" => 1, "\x07" => 1, + "\x08" => 1, "\x09" => 1, "\x0a" => 1, "\x0b" => 1, "\x0c" => 1, "\x0d" => 1, "\x0e" => 1, "\x0f" => 1, + "\x10" => 1, "\x11" => 1, "\x12" => 1, "\x13" => 1, "\x14" => 1, "\x15" => 1, "\x16" => 1, "\x17" => 1, + "\x18" => 1, "\x19" => 1, "\x1a" => 1, "\x1b" => 1, "\x1c" => 1, "\x1d" => 1, "\x1e" => 1, "\x1f" => 1, + "\x20" => 1, "\x21" => 1, "\x22" => 1, "\x23" => 1, "\x24" => 1, "\x25" => 1, "\x26" => 1, "\x27" => 1, + "\x28" => 1, "\x29" => 1, "\x2a" => 1, "\x2b" => 1, "\x2c" => 1, "\x2d" => 1, "\x2e" => 1, "\x2f" => 1, + "\x30" => 1, "\x31" => 1, "\x32" => 1, "\x33" => 1, "\x34" => 1, "\x35" => 1, "\x36" => 1, "\x37" => 1, + "\x38" => 1, "\x39" => 1, "\x3a" => 1, "\x3b" => 1, "\x3c" => 1, "\x3d" => 1, "\x3e" => 1, "\x3f" => 1, + "\x40" => 1, "\x41" => 1, "\x42" => 1, "\x43" => 1, "\x44" => 1, "\x45" => 1, "\x46" => 1, "\x47" => 1, + "\x48" => 1, "\x49" => 1, "\x4a" => 1, "\x4b" => 1, "\x4c" => 1, "\x4d" => 1, "\x4e" => 1, "\x4f" => 1, + "\x50" => 1, "\x51" => 1, "\x52" => 1, "\x53" => 1, "\x54" => 1, "\x55" => 1, "\x56" => 1, "\x57" => 1, + "\x58" => 1, "\x59" => 1, "\x5a" => 1, "\x5b" => 1, "\x5c" => 1, "\x5d" => 1, "\x5e" => 1, "\x5f" => 1, + "\x60" => 1, "\x61" => 1, "\x62" => 1, "\x63" => 1, "\x64" => 1, "\x65" => 1, "\x66" => 1, "\x67" => 1, + "\x68" => 1, "\x69" => 1, "\x6a" => 1, "\x6b" => 1, "\x6c" => 1, "\x6d" => 1, "\x6e" => 1, "\x6f" => 1, + "\x70" => 1, "\x71" => 1, "\x72" => 1, "\x73" => 1, "\x74" => 1, "\x75" => 1, "\x76" => 1, "\x77" => 1, + "\x78" => 1, "\x79" => 1, "\x7a" => 1, "\x7b" => 1, "\x7c" => 1, "\x7d" => 1, "\x7e" => 1, "\x7f" => 1, + "\x80" => 0, "\x81" => 0, "\x82" => 0, "\x83" => 0, "\x84" => 0, "\x85" => 0, "\x86" => 0, "\x87" => 0, + "\x88" => 0, "\x89" => 0, "\x8a" => 0, "\x8b" => 0, "\x8c" => 0, "\x8d" => 0, "\x8e" => 0, "\x8f" => 0, + "\x90" => 0, "\x91" => 0, "\x92" => 0, "\x93" => 0, "\x94" => 0, "\x95" => 0, "\x96" => 0, "\x97" => 0, + "\x98" => 0, "\x99" => 0, "\x9a" => 0, "\x9b" => 0, "\x9c" => 0, "\x9d" => 0, "\x9e" => 0, "\x9f" => 0, + "\xa0" => 0, "\xa1" => 0, "\xa2" => 0, "\xa3" => 0, "\xa4" => 0, "\xa5" => 0, "\xa6" => 0, "\xa7" => 0, + "\xa8" => 0, "\xa9" => 0, "\xaa" => 0, "\xab" => 0, "\xac" => 0, "\xad" => 0, "\xae" => 0, "\xaf" => 0, + "\xb0" => 0, "\xb1" => 0, "\xb2" => 0, "\xb3" => 0, "\xb4" => 0, "\xb5" => 0, "\xb6" => 0, "\xb7" => 0, + "\xb8" => 0, "\xb9" => 0, "\xba" => 0, "\xbb" => 0, "\xbc" => 0, "\xbd" => 0, "\xbe" => 0, "\xbf" => 0, + "\xc0" => 2, "\xc1" => 2, "\xc2" => 2, "\xc3" => 2, "\xc4" => 2, "\xc5" => 2, "\xc6" => 2, "\xc7" => 2, + "\xc8" => 2, "\xc9" => 2, "\xca" => 2, "\xcb" => 2, "\xcc" => 2, "\xcd" => 2, "\xce" => 2, "\xcf" => 2, + "\xd0" => 2, "\xd1" => 2, "\xd2" => 2, "\xd3" => 2, "\xd4" => 2, "\xd5" => 2, "\xd6" => 2, "\xd7" => 2, + "\xd8" => 2, "\xd9" => 2, "\xda" => 2, "\xdb" => 2, "\xdc" => 2, "\xdd" => 2, "\xde" => 2, "\xdf" => 2, + "\xe0" => 3, "\xe1" => 3, "\xe2" => 3, "\xe3" => 3, "\xe4" => 3, "\xe5" => 3, "\xe6" => 3, "\xe7" => 3, + "\xe8" => 3, "\xe9" => 3, "\xea" => 3, "\xeb" => 3, "\xec" => 3, "\xed" => 3, "\xee" => 3, "\xef" => 3, + "\xf0" => 4, "\xf1" => 4, "\xf2" => 4, "\xf3" => 4, "\xf4" => 4, "\xf5" => 4, "\xf6" => 4, "\xf7" => 4, + "\xf8" => 5, "\xf9" => 5, "\xfa" => 5, "\xfb" => 5, "\xfc" => 6, "\xfd" => 6, "\xfe" => 0, "\xff" => 0, + ]; + + private $data = ''; + private $dataSize = 0; + private $map = []; + private $charCount = 0; + private $currentPos = 0; + private $fixedWidth = 0; + + /** + * @param resource|string $input + */ + public function __construct($input, ?string $charset = 'utf-8') + { + $charset = strtolower(trim($charset)) ?: 'utf-8'; + if ('utf-8' === $charset || 'utf8' === $charset) { + $this->fixedWidth = 0; + $this->map = ['p' => [], 'i' => []]; + } else { + switch ($charset) { + // 16 bits + case 'ucs2': + case 'ucs-2': + case 'utf16': + case 'utf-16': + $this->fixedWidth = 2; + break; + + // 32 bits + case 'ucs4': + case 'ucs-4': + case 'utf32': + case 'utf-32': + $this->fixedWidth = 4; + break; + + // 7-8 bit charsets: (us-)?ascii, (iso|iec)-?8859-?[0-9]+, windows-?125[0-9], cp-?[0-9]+, ansi, macintosh, + // koi-?7, koi-?8-?.+, mik, (cork|t1), v?iscii + // and fallback + default: + $this->fixedWidth = 1; + } + } + if (\is_resource($input)) { + $blocks = 512; + if (stream_get_meta_data($input)['seekable'] ?? false) { + rewind($input); + } + while (false !== $read = fread($input, $blocks)) { + $this->write($read); + } + } else { + $this->write($input); + } + } + + public function read(int $length): ?string + { + if ($this->currentPos >= $this->charCount) { + return null; + } + $ret = null; + $length = ($this->currentPos + $length > $this->charCount) ? $this->charCount - $this->currentPos : $length; + if ($this->fixedWidth > 0) { + $len = $length * $this->fixedWidth; + $ret = substr($this->data, $this->currentPos * $this->fixedWidth, $len); + $this->currentPos += $length; + } else { + $end = $this->currentPos + $length; + $end = $end > $this->charCount ? $this->charCount : $end; + $ret = ''; + $start = 0; + if ($this->currentPos > 0) { + $start = $this->map['p'][$this->currentPos - 1]; + } + $to = $start; + for (; $this->currentPos < $end; ++$this->currentPos) { + if (isset($this->map['i'][$this->currentPos])) { + $ret .= substr($this->data, $start, $to - $start).'?'; + $start = $this->map['p'][$this->currentPos]; + } else { + $to = $this->map['p'][$this->currentPos]; + } + } + $ret .= substr($this->data, $start, $to - $start); + } + + return $ret; + } + + public function readBytes(int $length): ?array + { + if (null !== $read = $this->read($length)) { + return array_map('ord', str_split($read, 1)); + } + + return null; + } + + public function setPointer(int $charOffset): void + { + if ($this->charCount < $charOffset) { + $charOffset = $this->charCount; + } + $this->currentPos = $charOffset; + } + + public function write(string $chars): void + { + $ignored = ''; + $this->data .= $chars; + if ($this->fixedWidth > 0) { + $strlen = \strlen($chars); + $ignoredL = $strlen % $this->fixedWidth; + $ignored = $ignoredL ? substr($chars, -$ignoredL) : ''; + $this->charCount += ($strlen - $ignoredL) / $this->fixedWidth; + } else { + $this->charCount += $this->getUtf8CharPositions($chars, $this->dataSize, $ignored); + } + $this->dataSize = \strlen($this->data) - \strlen($ignored); + } + + private function getUtf8CharPositions(string $string, int $startOffset, &$ignoredChars): int + { + $strlen = \strlen($string); + $charPos = \count($this->map['p']); + $foundChars = 0; + $invalid = false; + for ($i = 0; $i < $strlen; ++$i) { + $char = $string[$i]; + $size = self::UTF8_LENGTH_MAP[$char]; + if (0 == $size) { + /* char is invalid, we must wait for a resync */ + $invalid = true; + continue; + } + + if ($invalid) { + /* We mark the chars as invalid and start a new char */ + $this->map['p'][$charPos + $foundChars] = $startOffset + $i; + $this->map['i'][$charPos + $foundChars] = true; + ++$foundChars; + $invalid = false; + } + if (($i + $size) > $strlen) { + $ignoredChars = substr($string, $i); + break; + } + for ($j = 1; $j < $size; ++$j) { + $char = $string[$i + $j]; + if ($char > "\x7F" && $char < "\xC0") { + // Valid - continue parsing + } else { + /* char is invalid, we must wait for a resync */ + $invalid = true; + continue 2; + } + } + /* Ok we got a complete char here */ + $this->map['p'][$charPos + $foundChars] = $startOffset + $i + $size; + $i += $j - 1; + ++$foundChars; + } + + return $foundChars; + } +} |