%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/* ===========================================================================
* Copyright 2018-2021 Zindex Software
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============================================================================ */
namespace Opis\String;
use RuntimeException;
use OutOfBoundsException;
use Countable, ArrayAccess;
use JsonSerializable;
use Opis\String\Exception\{
UnicodeException,
InvalidStringException,
InvalidCodePointException
};
class UnicodeString implements Countable, ArrayAccess, JsonSerializable
{
const KEEP_CASE = 0;
const LOWER_CASE = 1;
const UPPER_CASE = 2;
const FOLD_CASE = 3;
const ASCII_CONV = 4;
/**
* @var int[]
*/
private array $codes;
/**
* @var string[]|null
*/
private ?array $chars = null;
private int $length;
private ?string $str = null;
private ?array $cache = null;
/**
* @var int[][]
*/
private static array $maps = [];
/**
* @param int[] $codes
*/
private function __construct(array $codes = [])
{
$this->codes = $codes;
$this->length = count($codes);
}
/**
* @return int[]
*/
public function codePoints(): array
{
return $this->codes;
}
/**
* @return string[]
*/
public function chars(): array
{
if ($this->chars === null) {
$this->chars = self::getCharsFromCodePoints($this->codes);
}
return $this->chars;
}
/**
* @return int
*/
public function length(): int
{
return $this->length;
}
/**
* @return bool
*/
public function isEmpty(): bool
{
return $this->length === 0;
}
/**
* @param string|self|int[]|string[] $text
* @param bool $ignoreCase
* @return bool
*/
public function equals($text, bool $ignoreCase = false): bool
{
return $this->compareTo($text, $ignoreCase) === 0;
}
/**
* @param string|self|int[]|string[] $text
* @param bool $ignoreCase
* @return int
*/
public function compareTo($text, bool $ignoreCase = false): int
{
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$text = self::resolveCodePoints($text, $mode);
$length = count($text);
if ($length !== $this->length) {
return $this->length <=> $length;
}
return $this->getMappedCodes($mode) <=> $text;
}
/**
* @param string|self|int[]|string[] $text
* @param bool $ignoreCase
* @return bool
*/
public function contains($text, bool $ignoreCase = false): bool
{
return $this->indexOf($text, 0, $ignoreCase) !== -1;
}
/**
* @param string|self|int[]|string[] $text
* @param bool $ignoreCase
* @return bool
*/
public function startsWith($text, bool $ignoreCase = false): bool
{
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$text = self::resolveCodePoints($text, $mode);
$len = count($text);
if ($len === 0 || $len > $this->length) {
return false;
}
return array_slice($this->getMappedCodes($mode), 0, $len) === $text;
}
/**
* @param string|self|int[]|string[] $text
* @param bool $ignoreCase
* @return bool
*/
public function endsWith($text, bool $ignoreCase = false): bool
{
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$text = self::resolveCodePoints($text, $mode);
if (empty($text)) {
return false;
}
$codes = $this->getMappedCodes($mode);
$offset = $this->length - count($text);
if ($offset < 0) {
return false;
}
return array_slice($codes, $offset) === $text;
}
/**
* @param string|self|int[]|string[] $text
* @param int $offset
* @param bool $ignoreCase
* @return int
*/
public function indexOf($text, int $offset = 0, bool $ignoreCase = false): int
{
if ($offset < 0) {
$offset += $this->length;
}
if ($offset < 0 || $offset >= $this->length) {
return -1;
}
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$text = self::resolveCodePoints($text, $mode);
$len = count($text);
if ($len === 0 || $offset + $len > $this->length) {
return -1;
}
return $this->doIndexOf($this->getMappedCodes($mode), $text, $offset);
}
/**
* @param string|self|int[]|string[] $text
* @param int $offset
* @param bool $ignoreCase
* @return int
*/
public function lastIndexOf($text, int $offset = 0, bool $ignoreCase = false): int
{
if ($offset < 0) {
$start = $this->length + $offset;
if ($start < 0) {
return -1;
}
$last = 0;
} else {
if ($offset >= $this->length) {
return -1;
}
$start = $this->length - 1;
$last = $offset;
}
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$text = self::resolveCodePoints($text, $mode);
$len = count($text);
if ($len === 0) {
return -1;
}
if ($offset < 0) {
if ($len > $this->length) {
return -1;
}
$start = min($start, $this->length - $len);
} elseif ($offset + $len > $this->length) {
return -1;
}
$codes = $this->getMappedCodes($mode);
for ($i = $start; $i >= $last; $i--) {
$match = true;
for ($j = 0; $j < $len; $j++) {
if ($codes[$i + $j] !== $text[$j]) {
$match = false;
break;
}
}
if ($match) {
return $i;
}
}
return -1;
}
/**
* @param string|self|int[]|string[] $text
* @param bool $ignoreCase
* @param bool $allowPrefixOnly If true the result can contain only the prefix
* @return $this
*/
public function ensurePrefix($text, bool $ignoreCase = false, bool $allowPrefixOnly = true): self
{
$text = self::resolveCodePoints($text);
$len = count($text);
if ($len === 0) {
return clone $this;
}
if ($this->length === 0) {
return new static($text);
}
if ($ignoreCase) {
$prefix = self::getMappedCodePoints($text, self::FOLD_CASE);
} else {
$prefix = &$text;
}
if ($this->length === $len) {
$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
if ($allowPrefixOnly && $part === $prefix) {
return clone $this;
}
// Remove last element to avoid double check
array_pop($part);
} elseif ($this->length < $len) {
$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
// Checks if this can be a suffix
if ($allowPrefixOnly && (array_slice($prefix, 0, $this->length) === $part)) {
$text = array_slice($text, $this->length);
return new static(array_merge($this->codes, $text));
}
} else {
$part = array_slice($this->codes, 0, $len);
if ($ignoreCase) {
$part = self::getMappedCodePoints($part, self::FOLD_CASE);
}
if ($part === $prefix) {
return clone $this;
}
// Remove last element to avoid double check
array_pop($part);
}
$copy = $len;
$part_len = count($part);
while ($part_len) {
if ($part === array_slice($prefix, -$part_len)) {
$copy = $len - $part_len;
break;
}
array_pop($part);
$part_len--;
}
if ($copy === 0) {
return clone $this;
}
if ($copy < $len) {
$text = array_slice($text, 0, $copy);
}
return new static(array_merge($text, $this->codes));
}
/**
* @param string|self|int[]|string[] $text
* @param bool $ignoreCase
* @param bool $allowSuffixOnly If true the result can contain only the suffix
* @return static
*/
public function ensureSuffix($text, bool $ignoreCase = false, bool $allowSuffixOnly = true): self
{
$text = self::resolveCodePoints($text);
$len = count($text);
if ($len === 0) {
return clone $this;
}
if ($this->length === 0) {
return new static($text);
}
if ($ignoreCase) {
$suffix = self::getMappedCodePoints($text, self::FOLD_CASE);
} else {
$suffix = &$text;
}
if ($this->length === $len) {
$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
if ($allowSuffixOnly && $part === $suffix) {
return clone $this;
}
// Remove first element to avoid double check
array_shift($part);
} elseif ($this->length < $len) {
$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
// Checks if this can be a prefix
if ($allowSuffixOnly && (array_slice($suffix, -$this->length) === $part)) {
$text = array_slice($text, 0, $len - $this->length);
return new static(array_merge($text, $this->codes));
}
} else {
$part = array_slice($this->codes, -$len);
if ($ignoreCase) {
$part = self::getMappedCodePoints($part, self::FOLD_CASE);
}
if ($part === $suffix) {
return clone $this;
}
// Remove first element to avoid double check
array_shift($part);
}
$skip = 0;
$part_len = count($part);
while ($part_len) {
if ($part === array_slice($suffix, 0, $part_len)) {
$skip = $part_len;
break;
}
array_shift($part);
$part_len--;
}
if ($skip === $len) {
return clone $this;
}
if ($skip) {
array_splice($text, 0, $skip);
}
return new static(array_merge($this->codes, $text));
}
/**
* @param string|self|int[]|string[] $text
* @param int $mode
* @return static
*/
public function append($text, int $mode = self::KEEP_CASE): self
{
return new static(array_merge($this->codes, self::resolveCodePoints($text, $mode)));
}
/**
* @param string|self|int[]|string[] $text
* @param int $mode
* @return static
*/
public function prepend($text, int $mode = self::KEEP_CASE): self
{
return new static(array_merge(self::resolveCodePoints($text, $mode), $this->codes));
}
/**
* @param string|self|int[]|string[] $text
* @param int $offset
* @param int $mode
* @return static
*/
public function insert($text, int $offset, int $mode = self::KEEP_CASE): self
{
$codes = $this->codes;
array_splice($codes, $offset, 0, self::resolveCodePoints($text, $mode));
return new static($codes);
}
/**
* @param int $offset
* @param int|null $length
* @return static
*/
public function remove(int $offset, ?int $length = null): self
{
$codes = $this->codes;
if ($length === null) {
array_splice($codes, $offset);
} else {
array_splice($codes, $offset, $length);
}
return new static($codes);
}
/**
* @param string|self|int[]|string[] $mask
* @return static
*/
public function trim($mask = " \t\n\r\0\x0B"): self
{
return $this->doTrim($mask, true, true);
}
/**
* @param string|self|int[]|string[] $mask
* @return static
*/
public function trimLeft($mask = " \t\n\r\0\x0B"): self
{
return $this->doTrim($mask, true, false);
}
/**
* @param string|self|int[]|string[] $mask
* @return static
*/
public function trimRight($mask = " \t\n\r\0\x0B"): self
{
return $this->doTrim($mask, false, true);
}
/**
* @return static
*/
public function reverse(): self
{
return new static(array_reverse($this->codes));
}
/**
* @param int $times
* @return static
*/
public function repeat(int $times = 1): self
{
if ($times <= 1) {
return clone $this;
}
$codes = [];
while ($times--) {
$codes = array_merge($codes, $this->codes);
}
return new static($codes);
}
/**
* @param string|self|int[]|string[] $subject
* @param string|self|int[]|string[] $replace
* @param int $offset
* @param bool $ignoreCase
* @return static
*/
public function replace($subject, $replace, int $offset = 0, bool $ignoreCase = false): self
{
if ($offset < 0) {
$offset += $this->length;
}
if ($offset < 0 || $offset >= $this->length) {
return clone $this;
}
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$subject = self::resolveCodePoints($subject, $mode);
$len = count($subject);
if ($len === 0 || $offset + $len > $this->length) {
return clone $this;
}
$offset = $this->doIndexOf($this->getMappedCodes($mode), $subject, $offset);
if ($offset === -1) {
return clone $this;
}
$codes = $this->codes;
array_splice($codes, $offset, count($subject), self::resolveCodePoints($replace));
return new static($codes);
}
/**
* @param string|self|int[]|string[] $subject
* @param string|self|int[]|string[] $replace
* @param bool $ignoreCase
* @param int $offset
* @return static
*/
public function replaceAll($subject, $replace, int $offset = 0, bool $ignoreCase = false): self
{
if ($offset < 0) {
$offset += $this->length;
}
if ($offset < 0 || $offset >= $this->length) {
return clone $this;
}
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$subject = self::resolveCodePoints($subject, $mode);
$len = count($subject);
if ($len === 0 || $offset + $len > $this->length) {
return clone $this;
}
$replace = self::resolveCodePoints($replace);
$codes = $this->getMappedCodes($mode);
$copy = $this->codes;
$fix = count($replace) - $len;
$t = 0;
while (($pos = $this->doIndexOf($codes, $subject, $offset)) >= 0) {
array_splice($copy, $pos + $t * $fix, $len, $replace);
$offset = $pos + $len;
$t++;
}
return new static($copy);
}
/**
* @param string|self|int[]|string[] $delimiter
* @param bool $ignoreCase
* @return array
*/
public function split($delimiter = '', bool $ignoreCase = false): array
{
$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
$delimiter = self::resolveCodePoints($delimiter, $mode);
$len = count($delimiter);
$ret = [];
if ($len === 0) {
foreach ($this->codes as $code) {
$ret[] = new static([$code]);
}
} else {
$codes = $this->getMappedCodes($mode);
$offset = 0;
while (($pos = $this->doIndexOf($codes, $delimiter, $offset)) >= 0) {
$ret[] = new static(array_slice($this->codes, $offset, $pos - $offset));
$offset = $pos + $len;
}
$ret[] = new static(array_slice($this->codes, $offset));
}
return $ret;
}
/**
* @param int $start
* @param int|null $length
* @return static
*/
public function substring(int $start, ?int $length = null): self
{
return new static(array_slice($this->codes, $start, $length));
}
/**
* @param int $size If negative then pad left otherwise pad right
* @param self|string|int $char A char or a code point
* @return static
*/
public function pad(int $size, $char = 0x20): self
{
return new static(array_pad($this->codes, $size, self::resolveFirstCodePoint($char, 0x20)));
}
/**
* @param int $size
* @param self|string|int $char
* @return static
*/
public function padLeft(int $size, $char = 0x20): self
{
if ($size > 0) {
$size = -$size;
}
return $this->pad($size, $char);
}
/**
* @param int $size
* @param self|string|int $char
* @return static
*/
public function padRight(int $size, $char = 0x20): self
{
if ($size < 0) {
$size = -$size;
}
return $this->pad($size, $char);
}
/**
* @return bool
*/
public function isLowerCase(): bool
{
return $this->isCase(self::LOWER_CASE);
}
/**
* @return bool
*/
public function isUpperCase(): bool
{
return $this->isCase(self::UPPER_CASE);
}
/**
* @return bool
*/
public function isAscii(): bool
{
$key = 'i' . self::ASCII_CONV;
if (!isset($this->cache[$key])) {
$ok = true;
foreach ($this->codes as $code) {
if ($code >= 0x80) {
$ok = false;
break;
}
}
$this->cache[$key] = $ok;
}
return $this->cache[$key];
}
/**
* Convert all chars to lower case (where possible)
* @return static
*/
public function toLower(): self
{
if ($this->cache['i' . self::LOWER_CASE] ?? false) {
return clone $this;
}
return new static($this->getMappedCodes(self::LOWER_CASE));
}
/**
* Convert all chars to upper case (where possible)
* @return static
*/
public function toUpper(): self
{
if ($this->cache['i' . self::UPPER_CASE] ?? false) {
return clone $this;
}
return new static($this->getMappedCodes(self::UPPER_CASE));
}
/**
* Converts all chars to their ASCII equivalent (if any)
* @return static
*/
public function toAscii(): self
{
if ($this->cache['i' . self::ASCII_CONV] ?? false) {
return clone $this;
}
return new static($this->getMappedCodes(self::ASCII_CONV));
}
/**
* @param int $index
* @return string
*/
public function charAt(int $index): string
{
// Allow negative index
if ($index < 0 && $index + $this->length >= 0) {
$index += $this->length;
}
if ($index < 0 || $index >= $this->length) {
return '';
}
return $this->chars()[$index];
}
/**
* @param int $index
* @return int
*/
public function codePointAt(int $index): int
{
// Allow negative index
if ($index < 0 && $index + $this->length >= 0) {
$index += $this->length;
}
if ($index < 0 || $index >= $this->length) {
return -1;
}
return $this->codes[$index];
}
/**
* @param int $offset
* @return int
*/
public function __invoke(int $offset): int
{
if ($offset < 0) {
if ($offset + $this->length < 0) {
throw new OutOfBoundsException("Undefined offset: {$offset}");
}
$offset += $this->length;
} elseif ($offset >= $this->length) {
throw new OutOfBoundsException("Undefined offset: {$offset}");
}
return $this->codes[$offset];
}
/**
* @inheritDoc
*/
public function offsetExists($offset): bool
{
// Allow negative index
if ($offset < 0) {
$offset += $this->length;
}
return isset($this->codes[$offset]);
}
/**
* @inheritDoc
*/
public function offsetGet($offset): string
{
if ($offset < 0) {
if ($offset + $this->length < 0) {
throw new OutOfBoundsException("Undefined offset: {$offset}");
}
$offset += $this->length;
} elseif ($offset >= $this->length) {
throw new OutOfBoundsException("Undefined offset: {$offset}");
}
return $this->chars()[$offset];
}
/**
* @inheritDoc
*/
#[\ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
// Allow negative index
if ($offset < 0) {
$offset += $this->length;
}
if (!isset($this->codes[$offset])) {
return;
}
$value = self::resolveFirstCodePoint($value);
if ($value === -1) {
return;
}
if ($value === $this->codes[$offset]) {
// Same value, nothing to do
return;
}
$this->codes[$offset] = $value;
// Clear cache
$this->str = null;
$this->cache = null;
if ($this->chars) {
$this->chars[$offset] = self::getCharFromCodePoint($value);
}
}
/**
* @inheritDoc
*/
#[\ReturnTypeWillChange]
public function offsetUnset($offset)
{
throw new RuntimeException("Invalid operation");
}
/**
* @inheritDoc
*/
public function count(): int
{
return $this->length;
}
/**
* @return string
*/
public function __toString(): string
{
if ($this->str === null) {
$this->str = self::getStringFromCodePoints($this->codes);
}
return $this->str;
}
/**
* @inheritDoc
*/
public function jsonSerialize(): string
{
return $this->__toString();
}
public function __serialize(): array
{
return [
'value' => $this->__toString(),
];
}
public function __unserialize(array $data): void
{
$this->str = $data['value'];
$this->codes = self::getCodePointsFromString($this->str);
$this->length = count($this->codes);
}
/**
* Creates an unicode string instance from raw string
* @param string $string
* @param string|null $encoding Defaults to UTF-8
* @param int $mode
* @return static
* @throws InvalidStringException
*/
public static function from(string $string, ?string $encoding = null, int $mode = self::KEEP_CASE): self
{
if ($encoding !== null && strcasecmp($encoding, 'UTF-8') !== 0) {
if (false === $string = @iconv($encoding, 'UTF-8', $string)) {
throw new UnicodeException("Could not convert string from '$encoding' encoding to UTF-8 encoding");
}
}
$instance = new static(self::getCodePointsFromString($string, $mode));
if ($mode === self::KEEP_CASE) {
$instance->str = $string;
}
return $instance;
}
/**
* Creates an unicode string instance from code points
* @param int[] $codes
* @param int $mode
* @return static
* @throws InvalidCodePointException
*/
public static function fromCodePoints(array $codes, int $mode = self::KEEP_CASE): self
{
$map = self::getMapByMode($mode);
foreach ($codes as &$code) {
if (!is_int($codes) || !self::isValidCodePoint($code)) {
throw new InvalidCodePointException($code);
} else {
$code = $map[$code] ?? $code;
}
}
return new static(array_values($codes));
}
/**
* Converts the code point to corresponding char
* @param int $code
* @return string The char or an empty string if code point is invalid
*/
public static function getCharFromCodePoint(int $code): string
{
if ($code < 0) {
return '';
}
if ($code < 0x80) {
return chr($code);
}
if ($code < 0x800) {
return chr(($code >> 6) + 0xC0) . chr(($code & 0x3F) + 0x80);
}
if ($code >= 0xD800 && $code <= 0xDFFF) {
/*
The definition of UTF-8 prohibits encoding character numbers between
U+D800 and U+DFFF, which are reserved for use with the UTF-16
encoding form (as surrogate pairs) and do not directly represent characters.
*/
return '';
}
if ($code <= 0xFFFF) {
return
chr(($code >> 12) + 0xE0) .
chr((($code >> 6) & 0x3F) + 0x80) .
chr(($code & 0x3F) + 0x80);
}
if ($code <= 0x10FFFF) {
return
chr(($code >> 18) + 0xF0) .
chr((($code >> 12) & 0x3F) + 0x80) .
chr((($code >> 6) & 0x3F) + 0x80) .
chr(($code & 0x3F) + 0x80);
}
/*
Restricted the range of characters to 0000-10FFFF (the UTF-16 accessible range).
*/
return '';
}
/**
* Convert a string to a code point array
* @param string $str
* @param int $mode
* @return array
* @throws InvalidStringException
*/
public static function getCodePointsFromString(string $str, int $mode = self::KEEP_CASE): array
{
// 0x00-0x7F
// 0xC2-0xDF 0x80-0xBF
// 0xE0-0xE0 0xA0-0xBF 0x80-0xBF
// 0xE1-0xEC 0x80-0xBF 0x80-0xBF
// 0xED-0xED 0x80-0x9F 0x80-0xBF
// 0xEE-0xEF 0x80-0xBF 0x80-0xBF
// 0xF0-0xF0 0x90-0xBF 0x80-0xBF 0x80-0xBF
// 0xF1-0xF3 0x80-0xBF 0x80-0xBF 0x80-0xBF
// 0xF4-0xF4 0x80-0x8F 0x80-0xBF 0x80-0xBF
$codes = [];
$length = strlen($str);
$mode = self::getMapByMode($mode);
$i = 0;
while ($i < $length) {
$ord0 = ord($str[$i++]);
if ($ord0 < 0x80) {
$codes[] = $mode[$ord0] ?? $ord0;
continue;
}
if ($i === $length || $ord0 < 0xC2 || $ord0 > 0xF4) {
throw new InvalidStringException($str, $i - 1);
}
$ord1 = ord($str[$i++]);
if ($ord0 < 0xE0) {
if ($ord1 < 0x80 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 1);
}
$ord1 = ($ord0 - 0xC0) * 64 + $ord1 - 0x80;
$codes[] = $mode[$ord1] ?? $ord1;
continue;
}
if ($i === $length) {
throw new InvalidStringException($str, $i - 1);
}
$ord2 = ord($str[$i++]);
if ($ord0 < 0xF0) {
if ($ord0 === 0xE0) {
if ($ord1 < 0xA0 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 2);
}
} elseif ($ord0 === 0xED) {
if ($ord1 < 0x80 || $ord1 >= 0xA0) {
throw new InvalidStringException($str, $i - 2);
}
} elseif ($ord1 < 0x80 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 2);
}
if ($ord2 < 0x80 || $ord2 >= 0xC0) {
throw new InvalidStringException($str, $i - 1);
}
$ord2 = ($ord0 - 0xE0) * 0x1000 + ($ord1 - 0x80) * 64 + $ord2 - 0x80;
$codes[] = $mode[$ord2] ?? $ord2;
continue;
}
if ($i === $length) {
throw new InvalidStringException($str, $i - 1);
}
$ord3 = ord($str[$i++]);
if ($ord0 < 0xF5) {
if ($ord0 === 0xF0) {
if ($ord1 < 0x90 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 3);
}
} elseif ($ord0 === 0xF4) {
if ($ord1 < 0x80 || $ord1 >= 0x90) {
throw new InvalidStringException($str, $i - 3);
}
} elseif ($ord1 < 0x80 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 3);
}
if ($ord2 < 0x80 || $ord2 >= 0xC0) {
throw new InvalidStringException($str, $i - 2);
}
if ($ord3 < 0x80 || $ord3 >= 0xC0) {
throw new InvalidStringException($str, $i - 1);
}
$ord3 = ($ord0 - 0xF0) * 0x40000 + ($ord1 - 0x80) * 0x1000 + ($ord2 - 0x80) * 64 + $ord3 - 0x80;
$codes[] = $mode[$ord3] ?? $ord3;
continue;
}
throw new InvalidStringException($str, $i - 1);
}
return $codes;
}
/**
* @param string $str
* @return iterable
*
* The key represents the current char index
* Value is a two element array
* - first element is an integer representing the code point
* - second element is an array of integers (length 1 to 4) representing bytes
*/
public static function walkString(string $str): iterable
{
$i = 0;
$length = strlen($str);
while ($i < $length) {
$index = $i;
$ord0 = ord($str[$i++]);
if ($ord0 < 0x80) {
yield $index => [
$ord0,
[$ord0]
];
continue;
}
if ($i === $length || $ord0 < 0xC2 || $ord0 > 0xF4) {
throw new InvalidStringException($str, $i - 1);
}
$ord1 = ord($str[$i++]);
if ($ord0 < 0xE0) {
if ($ord1 < 0x80 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 1);
}
yield $index => [
($ord0 - 0xC0) * 64 + $ord1 - 0x80,
[$ord0, $ord1]
];
continue;
}
if ($i === $length) {
throw new InvalidStringException($str, $i - 1);
}
$ord2 = ord($str[$i++]);
if ($ord0 < 0xF0) {
if ($ord0 === 0xE0) {
if ($ord1 < 0xA0 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 2);
}
} elseif ($ord0 === 0xED) {
if ($ord1 < 0x80 || $ord1 >= 0xA0) {
throw new InvalidStringException($str, $i - 2);
}
} elseif ($ord1 < 0x80 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 2);
}
if ($ord2 < 0x80 || $ord2 >= 0xC0) {
throw new InvalidStringException($str, $i - 1);
}
yield $index => [
($ord0 - 0xE0) * 0x1000 + ($ord1 - 0x80) * 64 + $ord2 - 0x80,
[$ord0, $ord1, $ord2]
];
continue;
}
if ($i === $length) {
throw new InvalidStringException($str, $i - 1);
}
$ord3 = ord($str[$i++]);
if ($ord0 < 0xF5) {
if ($ord0 === 0xF0) {
if ($ord1 < 0x90 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 3);
}
} elseif ($ord0 === 0xF4) {
if ($ord1 < 0x80 || $ord1 >= 0x90) {
throw new InvalidStringException($str, $i - 3);
}
} elseif ($ord1 < 0x80 || $ord1 >= 0xC0) {
throw new InvalidStringException($str, $i - 3);
}
if ($ord2 < 0x80 || $ord2 >= 0xC0) {
throw new InvalidStringException($str, $i - 2);
}
if ($ord3 < 0x80 || $ord3 >= 0xC0) {
throw new InvalidStringException($str, $i - 1);
}
yield $index => [
($ord0 - 0xF0) * 0x40000 + ($ord1 - 0x80) * 0x1000 + ($ord2 - 0x80) * 64 + $ord3 - 0x80,
[$ord0, $ord1, $ord2, $ord3]
];
continue;
}
throw new InvalidStringException($str, $i - 1);
}
}
/**
* Converts each code point to a char
* @param array $codes
* @param int $mode
* @return array
* @throws InvalidCodePointException
*/
public static function getCharsFromCodePoints(array $codes, int $mode = self::KEEP_CASE): array
{
$mode = self::getMapByMode($mode);
foreach ($codes as &$code) {
$char = self::getCharFromCodePoint($mode[$code] ?? $code);
if ($char === '') {
throw new InvalidCodePointException($code);
} else {
$code = $char;
}
}
return $codes;
}
/**
* @param string $str
* @param int $mode
* @return string[]
*/
public static function getCharsFromString(string $str, int $mode = self::KEEP_CASE): array
{
return self::getCharsFromCodePoints(self::getCodePointsFromString($str), $mode);
}
/**
* Converts all code points to chars and returns the string
* Invalid code points are ignored
* @param array $codes
* @param int $mode
* @return string
*/
public static function getStringFromCodePoints(array $codes, int $mode = self::KEEP_CASE): string
{
$str = '';
$mode = self::getMapByMode($mode);
foreach ($codes as $code) {
if (isset($mode[$code])) {
$code = $mode[$code];
}
if ($code < 0x80) {
$str .= chr($code);
continue;
}
if ($code < 0x800) {
$str .= chr(($code >> 6) + 0xC0) . chr(($code & 0x3F) + 0x80);
continue;
}
if ($code >= 0xD800 && $code <= 0xDFFF) {
continue;
}
if ($code <= 0xFFFF) {
$str .=
chr(($code >> 12) + 0xE0) .
chr((($code >> 6) & 0x3F) + 0x80) .
chr(($code & 0x3F) + 0x80);
continue;
}
if ($code <= 0x10FFFF) {
$str .=
chr(($code >> 18) + 0xF0) .
chr((($code >> 12) & 0x3F) + 0x80) .
chr((($code >> 6) & 0x3F) + 0x80) .
chr(($code & 0x3F) + 0x80);
}
}
return $str;
}
/**
* @param array $codes
* @param int $mode
* @return array
*/
public static function getMappedCodePoints(array $codes, int $mode): array
{
if ($mode === self::KEEP_CASE) {
return $codes;
}
$mode = self::getMapByMode($mode);
if (empty($mode)) {
return $codes;
}
foreach ($codes as &$code) {
$code = $mode[$code] ?? $code;
}
return $codes;
}
/**
* Checks if a code point is valid
* @param int $code
* @return bool
*/
public static function isValidCodePoint(int $code): bool
{
if ($code < 0 || $code > 0x10FFFF) {
return false;
}
return $code < 0xD800 || $code > 0xDFFF;
}
/**
* @param int $mode
* @return int[]
*/
private function getMappedCodes(int $mode): array
{
if ($mode === self::KEEP_CASE || ($this->cache['i' . $mode] ?? false)) {
return $this->codes;
}
$key = 'm' . $mode;
if (!isset($this->cache[$key])) {
$this->cache[$key] = self::getMappedCodePoints($this->codes, $mode);
}
return $this->cache[$key];
}
/**
* @param int $mode
* @return bool
*/
private function isCase(int $mode): bool
{
$key = 'i' . $mode;
if (!isset($this->cache[$key])) {
$list = self::getMapByMode($mode);
foreach ($this->codes as $code) {
if (isset($list[$code])) {
return $this->cache[$key] = false;
}
}
return $this->cache[$key] = true;
}
return $this->cache[$key];
}
/**
* @param int[] $codes
* @param int[] $text
* @param int $offset
* @return int
*/
private function doIndexOf(array $codes, array $text, int $offset = 0): int
{
$len = count($text);
for ($i = $offset, $last = count($codes) - $len; $i <= $last; $i++) {
$match = true;
for ($j = 0; $j < $len; $j++) {
if ($codes[$i + $j] !== $text[$j]) {
$match = false;
break;
}
}
if ($match) {
return $i;
}
}
return -1;
}
/**
* @param string|self|int[]|string[] $mask
* @param bool $left
* @param bool $right
* @return static
*/
private function doTrim($mask, bool $left, bool $right): self
{
if ($this->length === 0) {
return clone $this;
}
$mask = self::resolveCodePoints($mask);
if (empty($mask)) {
return clone $this;
}
$codes = $this->codes;
if ($left) {
while (in_array($codes[0], $mask, true)) {
array_shift($codes);
if (empty($codes)) {
return new static();
}
}
}
if ($right) {
$last = count($codes) - 1;
while (in_array($codes[$last], $mask, true)) {
array_pop($codes);
if (--$last < 0) {
return new static();
}
}
}
return new static($codes);
}
/**
* @param string|self|int[]|string[] $text
* @param int $mode
* @return array
*/
private static function resolveCodePoints($text, int $mode = self::KEEP_CASE): array
{
if ($text instanceof self) {
return $text->getMappedCodes($mode);
}
if (is_string($text)) {
return self::getCodePointsFromString($text, $mode);
}
if ($text && is_array($text) && is_int($text[0])) {
// assume code point array
return self::getMappedCodePoints($text, $mode);
}
return [];
}
/**
* @param self|string|int|string[]|int[] $text
* @param int $invalid
* @return int
*/
private static function resolveFirstCodePoint($text, int $invalid = -1): int
{
if ($text instanceof self) {
return $text->length === 0 ? $invalid : $text->codes[0];
}
if (is_array($text)) {
if (empty($text)) {
return $invalid;
}
$text = reset($text);
}
if (is_string($text)) {
if (isset($text[4])) {
$text = substr($text, 0, 4);
}
return self::getCodePointsFromString($text)[0] ?? $invalid;
}
if (is_int($text)) {
return self::isValidCodePoint($text) ? $text : $invalid;
}
return $invalid;
}
/**
* @param int $mode
* @return int[]
*/
private static function getMapByMode(int $mode): array
{
if (isset(self::$maps[$mode])) {
return self::$maps[$mode];
}
switch ($mode) {
case self::LOWER_CASE:
$file = 'lower';
break;
case self::UPPER_CASE:
$file = 'upper';
break;
case self::ASCII_CONV:
$file = 'ascii';
break;
case self::FOLD_CASE:
$file = 'fold';
break;
default:
return [];
}
/** @noinspection PhpIncludeInspection */
return self::$maps[$mode] = include(__DIR__ . "/../res/{$file}.php");
}
}
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