1597 lines
41 KiB
PHP
1597 lines
41 KiB
PHP
<?php
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/* ===========================================================================
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* Copyright 2018-2021 Zindex Software
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ============================================================================ */
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namespace Opis\String;
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use RuntimeException;
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use OutOfBoundsException;
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use Countable, ArrayAccess;
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use JsonSerializable;
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use Opis\String\Exception\{
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UnicodeException,
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InvalidStringException,
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InvalidCodePointException
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};
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class UnicodeString implements Countable, ArrayAccess, JsonSerializable
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{
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const KEEP_CASE = 0;
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const LOWER_CASE = 1;
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const UPPER_CASE = 2;
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const FOLD_CASE = 3;
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const ASCII_CONV = 4;
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/**
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* @var int[]
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*/
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private array $codes;
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/**
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* @var string[]|null
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*/
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private ?array $chars = null;
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private int $length;
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private ?string $str = null;
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private ?array $cache = null;
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/**
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* @var int[][]
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*/
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private static array $maps = [];
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/**
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* @param int[] $codes
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*/
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private function __construct(array $codes = [])
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{
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$this->codes = $codes;
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$this->length = count($codes);
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}
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/**
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* @return int[]
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*/
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public function codePoints(): array
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{
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return $this->codes;
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}
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/**
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* @return string[]
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*/
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public function chars(): array
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{
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if ($this->chars === null) {
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$this->chars = self::getCharsFromCodePoints($this->codes);
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}
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return $this->chars;
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}
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/**
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* @return int
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*/
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public function length(): int
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{
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return $this->length;
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}
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/**
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* @return bool
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*/
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public function isEmpty(): bool
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{
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return $this->length === 0;
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param bool $ignoreCase
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* @return bool
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*/
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public function equals($text, bool $ignoreCase = false): bool
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{
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return $this->compareTo($text, $ignoreCase) === 0;
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param bool $ignoreCase
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* @return int
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*/
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public function compareTo($text, bool $ignoreCase = false): int
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{
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$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
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$text = self::resolveCodePoints($text, $mode);
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$length = count($text);
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if ($length !== $this->length) {
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return $this->length <=> $length;
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}
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return $this->getMappedCodes($mode) <=> $text;
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param bool $ignoreCase
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* @return bool
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*/
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public function contains($text, bool $ignoreCase = false): bool
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{
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return $this->indexOf($text, 0, $ignoreCase) !== -1;
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param bool $ignoreCase
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* @return bool
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*/
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public function startsWith($text, bool $ignoreCase = false): bool
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{
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$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
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$text = self::resolveCodePoints($text, $mode);
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$len = count($text);
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if ($len === 0 || $len > $this->length) {
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return false;
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}
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return array_slice($this->getMappedCodes($mode), 0, $len) === $text;
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param bool $ignoreCase
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* @return bool
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*/
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public function endsWith($text, bool $ignoreCase = false): bool
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{
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$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
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$text = self::resolveCodePoints($text, $mode);
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if (empty($text)) {
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return false;
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}
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$codes = $this->getMappedCodes($mode);
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$offset = $this->length - count($text);
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if ($offset < 0) {
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return false;
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}
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return array_slice($codes, $offset) === $text;
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param int $offset
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* @param bool $ignoreCase
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* @return int
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*/
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public function indexOf($text, int $offset = 0, bool $ignoreCase = false): int
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{
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if ($offset < 0) {
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$offset += $this->length;
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}
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if ($offset < 0 || $offset >= $this->length) {
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return -1;
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}
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$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
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$text = self::resolveCodePoints($text, $mode);
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$len = count($text);
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if ($len === 0 || $offset + $len > $this->length) {
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return -1;
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}
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return $this->doIndexOf($this->getMappedCodes($mode), $text, $offset);
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param int $offset
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* @param bool $ignoreCase
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* @return int
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*/
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public function lastIndexOf($text, int $offset = 0, bool $ignoreCase = false): int
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{
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if ($offset < 0) {
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$start = $this->length + $offset;
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if ($start < 0) {
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return -1;
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}
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$last = 0;
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} else {
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if ($offset >= $this->length) {
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return -1;
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}
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$start = $this->length - 1;
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$last = $offset;
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}
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$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
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$text = self::resolveCodePoints($text, $mode);
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$len = count($text);
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if ($len === 0) {
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return -1;
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}
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if ($offset < 0) {
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if ($len > $this->length) {
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return -1;
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}
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$start = min($start, $this->length - $len);
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} elseif ($offset + $len > $this->length) {
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return -1;
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}
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$codes = $this->getMappedCodes($mode);
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for ($i = $start; $i >= $last; $i--) {
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$match = true;
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for ($j = 0; $j < $len; $j++) {
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if ($codes[$i + $j] !== $text[$j]) {
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$match = false;
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break;
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}
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}
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if ($match) {
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return $i;
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}
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}
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return -1;
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param bool $ignoreCase
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* @param bool $allowPrefixOnly If true the result can contain only the prefix
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* @return $this
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*/
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public function ensurePrefix($text, bool $ignoreCase = false, bool $allowPrefixOnly = true): self
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{
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$text = self::resolveCodePoints($text);
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$len = count($text);
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if ($len === 0) {
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return clone $this;
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}
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if ($this->length === 0) {
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return new static($text);
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}
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if ($ignoreCase) {
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$prefix = self::getMappedCodePoints($text, self::FOLD_CASE);
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} else {
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$prefix = &$text;
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}
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if ($this->length === $len) {
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$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
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if ($allowPrefixOnly && $part === $prefix) {
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return clone $this;
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}
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// Remove last element to avoid double check
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array_pop($part);
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} elseif ($this->length < $len) {
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$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
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// Checks if this can be a suffix
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if ($allowPrefixOnly && (array_slice($prefix, 0, $this->length) === $part)) {
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$text = array_slice($text, $this->length);
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return new static(array_merge($this->codes, $text));
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}
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} else {
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$part = array_slice($this->codes, 0, $len);
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if ($ignoreCase) {
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$part = self::getMappedCodePoints($part, self::FOLD_CASE);
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}
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if ($part === $prefix) {
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return clone $this;
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}
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// Remove last element to avoid double check
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array_pop($part);
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}
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$copy = $len;
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$part_len = count($part);
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while ($part_len) {
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if ($part === array_slice($prefix, -$part_len)) {
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$copy = $len - $part_len;
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break;
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}
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array_pop($part);
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$part_len--;
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}
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if ($copy === 0) {
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return clone $this;
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}
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if ($copy < $len) {
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$text = array_slice($text, 0, $copy);
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}
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return new static(array_merge($text, $this->codes));
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param bool $ignoreCase
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* @param bool $allowSuffixOnly If true the result can contain only the suffix
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* @return static
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*/
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public function ensureSuffix($text, bool $ignoreCase = false, bool $allowSuffixOnly = true): self
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{
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$text = self::resolveCodePoints($text);
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$len = count($text);
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if ($len === 0) {
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return clone $this;
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}
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if ($this->length === 0) {
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return new static($text);
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}
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if ($ignoreCase) {
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$suffix = self::getMappedCodePoints($text, self::FOLD_CASE);
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} else {
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$suffix = &$text;
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}
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if ($this->length === $len) {
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$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
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if ($allowSuffixOnly && $part === $suffix) {
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return clone $this;
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}
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// Remove first element to avoid double check
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array_shift($part);
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} elseif ($this->length < $len) {
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$part = $this->getMappedCodes($ignoreCase ? self::FOLD_CASE : self::KEEP_CASE);
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// Checks if this can be a prefix
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if ($allowSuffixOnly && (array_slice($suffix, -$this->length) === $part)) {
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$text = array_slice($text, 0, $len - $this->length);
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return new static(array_merge($text, $this->codes));
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}
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} else {
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$part = array_slice($this->codes, -$len);
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if ($ignoreCase) {
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$part = self::getMappedCodePoints($part, self::FOLD_CASE);
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}
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if ($part === $suffix) {
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return clone $this;
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}
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// Remove first element to avoid double check
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array_shift($part);
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}
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$skip = 0;
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$part_len = count($part);
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while ($part_len) {
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if ($part === array_slice($suffix, 0, $part_len)) {
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$skip = $part_len;
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break;
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}
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array_shift($part);
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$part_len--;
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}
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if ($skip === $len) {
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return clone $this;
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}
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if ($skip) {
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array_splice($text, 0, $skip);
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}
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return new static(array_merge($this->codes, $text));
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param int $mode
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* @return static
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*/
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public function append($text, int $mode = self::KEEP_CASE): self
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{
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return new static(array_merge($this->codes, self::resolveCodePoints($text, $mode)));
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param int $mode
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* @return static
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*/
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public function prepend($text, int $mode = self::KEEP_CASE): self
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{
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return new static(array_merge(self::resolveCodePoints($text, $mode), $this->codes));
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}
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/**
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* @param string|self|int[]|string[] $text
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* @param int $offset
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* @param int $mode
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* @return static
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*/
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public function insert($text, int $offset, int $mode = self::KEEP_CASE): self
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{
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$codes = $this->codes;
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array_splice($codes, $offset, 0, self::resolveCodePoints($text, $mode));
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return new static($codes);
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}
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/**
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* @param int $offset
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* @param int|null $length
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* @return static
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*/
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public function remove(int $offset, ?int $length = null): self
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{
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$codes = $this->codes;
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if ($length === null) {
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array_splice($codes, $offset);
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} else {
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array_splice($codes, $offset, $length);
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}
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return new static($codes);
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}
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/**
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* @param string|self|int[]|string[] $mask
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* @return static
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*/
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public function trim($mask = " \t\n\r\0\x0B"): self
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{
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return $this->doTrim($mask, true, true);
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}
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/**
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* @param string|self|int[]|string[] $mask
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* @return static
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*/
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public function trimLeft($mask = " \t\n\r\0\x0B"): self
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{
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return $this->doTrim($mask, true, false);
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}
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/**
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* @param string|self|int[]|string[] $mask
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* @return static
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*/
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public function trimRight($mask = " \t\n\r\0\x0B"): self
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{
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return $this->doTrim($mask, false, true);
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}
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/**
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* @return static
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*/
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public function reverse(): self
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{
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return new static(array_reverse($this->codes));
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}
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/**
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* @param int $times
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* @return static
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*/
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public function repeat(int $times = 1): self
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{
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if ($times <= 1) {
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return clone $this;
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}
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$codes = [];
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while ($times--) {
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$codes = array_merge($codes, $this->codes);
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}
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return new static($codes);
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}
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|
|
/**
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* @param string|self|int[]|string[] $subject
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* @param string|self|int[]|string[] $replace
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* @param int $offset
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* @param bool $ignoreCase
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* @return static
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*/
|
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public function replace($subject, $replace, int $offset = 0, bool $ignoreCase = false): self
|
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{
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if ($offset < 0) {
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$offset += $this->length;
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}
|
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if ($offset < 0 || $offset >= $this->length) {
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return clone $this;
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}
|
|
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$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
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$subject = self::resolveCodePoints($subject, $mode);
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$len = count($subject);
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if ($len === 0 || $offset + $len > $this->length) {
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return clone $this;
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}
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$offset = $this->doIndexOf($this->getMappedCodes($mode), $subject, $offset);
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if ($offset === -1) {
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return clone $this;
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}
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$codes = $this->codes;
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array_splice($codes, $offset, count($subject), self::resolveCodePoints($replace));
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return new static($codes);
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}
|
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|
|
/**
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|
* @param string|self|int[]|string[] $subject
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|
* @param string|self|int[]|string[] $replace
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* @param bool $ignoreCase
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* @param int $offset
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* @return static
|
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*/
|
|
public function replaceAll($subject, $replace, int $offset = 0, bool $ignoreCase = false): self
|
|
{
|
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if ($offset < 0) {
|
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$offset += $this->length;
|
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}
|
|
if ($offset < 0 || $offset >= $this->length) {
|
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return clone $this;
|
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}
|
|
|
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$mode = $ignoreCase ? self::FOLD_CASE : self::KEEP_CASE;
|
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|
|
$subject = self::resolveCodePoints($subject, $mode);
|
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|
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$len = count($subject);
|
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|
|
if ($len === 0 || $offset + $len > $this->length) {
|
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return clone $this;
|
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}
|
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|
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$replace = self::resolveCodePoints($replace);
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|
|
$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");
|
|
}
|
|
}
|