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Add str_increment and str_decrement functions
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‎src/Php83/Php83.php

Lines changed: 112 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -13,6 +13,7 @@
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/**
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* @author Ion Bazan <ion.bazan@gmail.com>
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* @author Pierre Ambroise <pierre27.ambroise@gmail.com>
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*
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* @internal
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*/
@@ -82,4 +83,115 @@ public static function mb_str_pad(string $string, int $length, string $pad_strin
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return mb_substr(str_repeat($pad_string, $leftPaddingLength), 0, $leftPaddingLength, $encoding).$string.mb_substr(str_repeat($pad_string, $rightPaddingLength), 0, $rightPaddingLength, $encoding);
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}
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}
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public static function str_increment(string $string): string
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{
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if ('' === $string) {
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throw new \ValueError('str_increment(): Argument #1 ($string) cannot be empty');
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}
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if (!\preg_match("/^[a-zA-Z0-9]+$/", $string)) {
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throw new \ValueError('str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters');
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}
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if (\is_numeric($string)) {
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$offset = stripos($string, 'e');
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if ($offset !== false) {
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$char = $string[$offset];
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$char++;
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$string[$offset] = $char;
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$string++;
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switch ($string[$offset]) {
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case 'f':
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$string[$offset] = 'e';
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break;
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case 'F':
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$string[$offset] = 'E';
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break;
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case 'g':
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$string[$offset] = 'f';
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break;
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case 'G':
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$string[$offset] = 'F';
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break;
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}
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return $string;
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}
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}
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return ++$string;
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}
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public static function str_decrement(string $string): string
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{
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if ('' === $string) {
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throw new \ValueError('str_decrement(): Argument #1 ($string) cannot be empty');
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}
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if (!\preg_match("/^[a-zA-Z0-9]+$/", $string)) {
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throw new \ValueError('str_decrement(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters');
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}
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if (\preg_match('/\A(?:0[aA0]?|[aA])\z/', $string)) {
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throw new \ValueError(sprintf('str_decrement(): Argument #1 ($string) "%s" is out of decrement range', $string));
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}
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if (!\in_array(substr($string, -1), ['A', 'a', '0'], true)) {
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return join('', array_slice(str_split($string), 0, -1)) . chr(ord(substr($string, -1)) - 1);
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}
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$carry = '';
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$decremented = '';
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for ($i = strlen($string) - 1; $i >= 0; $i--) {
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$char = $string[$i];
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switch ($char) {
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case 'A':
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if ('' !== $carry) {
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$decremented .= $carry;
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$carry = '';
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}
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$carry = 'Z';
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break;
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case 'a':
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if ('' !== $carry) {
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$decremented .= $carry;
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$carry = '';
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}
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$carry = 'z';
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break;
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case '0':
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if ('' !== $carry) {
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$decremented .= $carry;
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$carry = '';
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}
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$carry = '9';
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break;
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case '1':
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if ('' !== $carry) {
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$decremented .= $carry;
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$carry = '';
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}
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break;
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default:
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if ('' !== $carry) {
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$decremented .= $carry;
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$carry = '';
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}
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if (!\in_array($char, ['A', 'a', '0'], true)) {
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$decremented .= chr(ord($char) - 1);
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}
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}
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}
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return strrev($decremented);
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}
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}

‎src/Php83/bootstrap.php

Lines changed: 8 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -27,6 +27,14 @@ function mb_str_pad(string $string, int $length, string $pad_string = ' ', int $
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function stream_context_set_options($context, array $options): bool { return stream_context_set_option($context, $options); }
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}
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if (!function_exists('str_increment')) {
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function str_increment(string $string): string { return p\Php83::str_increment($string); }
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}
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if (!function_exists('str_decrement')) {
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function str_decrement(string $string): string { return p\Php83::str_decrement($string); }
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}
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if (\PHP_VERSION_ID >= 80100) {
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return require __DIR__.'/bootstrap81.php';
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}

‎tests/Php83/Php83Test.php

Lines changed: 120 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -202,4 +202,124 @@ public function testDateTimeExceptionClassesExist()
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$this->assertTrue(class_exists(\DateMalformedIntervalStringException::class));
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$this->assertTrue(class_exists(\DateMalformedPeriodStringException::class));
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}
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/**
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* @covers \Symfony\Polyfill\Php83\Php83::str_increment
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*
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* @dataProvider strIncrementProvider
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*/
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public function testStrIncrement(string $result, string $string)
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{
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$this->assertSame($result, str_increment($string));
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}
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/**
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* @covers \Symfony\Polyfill\Php83\Php83::str_decrement
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*
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* @dataProvider strDecrementProvider
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*/
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public function testStrDecrement(string $result, string $string)
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{
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$this->assertSame($result, str_decrement($string));
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}
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public static function strIncrementProvider(): iterable
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{
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yield ['ABD', 'ABC'];
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yield ['EB', 'EA'];
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yield ['AAA', 'ZZ'];
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yield ['Ba', 'Az'];
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yield ['bA', 'aZ'];
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yield ['B0', 'A9'];
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yield ['b0', 'a9'];
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yield ['AAa', 'Zz'];
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yield ['aaA', 'zZ'];
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yield ['10a', '9z'];
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yield ['10A', '9Z'];
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yield ['5e7', '5e6'];
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yield ['e', 'd'];
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yield ['E', 'D'];
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yield ['5', '4'];
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}
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public static function strDecrementProvider(): iterable
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{
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yield ['Ay', 'Az'];
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yield ['aY', 'aZ'];
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yield ['A8', 'A9'];
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yield ['a8', 'a9'];
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yield ['Yz', 'Za'];
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yield ['yZ', 'zA'];
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yield ['Y9', 'Z0'];
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yield ['y9', 'z0'];
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yield ['Z', 'aA'];
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yield ['9', 'A0'];
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yield ['9', 'a0'];
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yield ['9', '10'];
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yield ['Z', '1A'];
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yield ['z', '1a'];
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yield ['9z', '10a'];
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yield ['5e5', '5e6'];
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yield ['C', 'D'];
264+
yield ['c', 'd'];
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yield ['3', '4'];
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}
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/**
269+
* @covers \Symfony\Polyfill\Php83\Php83::str_increment
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*
271+
* @dataProvider strInvalidIncrementProvider
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*/
273+
public function testInvalidStrIncrement(string $errorMessage, string $string)
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{
275+
$this->expectException(\ValueError::class);
276+
$this->expectExceptionMessage($errorMessage);
277+
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str_increment($string);
279+
}
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public static function strInvalidIncrementProvider(): iterable
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{
284+
yield ['str_increment(): Argument #1 ($string) cannot be empty', ""];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', "-cc"];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', "Z "];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', " Z"];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', "é"];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', '我喜歡雞肉'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', 'α'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', 'ω'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', 'Α'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', 'Ω'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', 'foo1.txt'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', '1f.5'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', 'foo.1.txt'];
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yield ['str_increment(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', '1.f.5'];
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}
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/**
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* @covers \Symfony\Polyfill\Php83\Php83::str_decrement
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*
304+
* @dataProvider strInvalidDecrementProvider
305+
*/
306+
public function testInvalidStrDecrement(string $errorMessage, string $string)
307+
{
308+
$this->expectException(\ValueError::class);
309+
$this->expectExceptionMessage($errorMessage);
310+
311+
str_decrement($string);
312+
}
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public static function strInvalidDecrementProvider(): iterable
315+
{
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yield ['str_decrement(): Argument #1 ($string) cannot be empty', ''];
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yield ['str_decrement(): Argument #1 ($string) must be composed only of alphanumeric ASCII characters', '我喜歡雞肉'];
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yield ['str_decrement(): Argument #1 ($string) "0" is out of decrement range', '0'];
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yield ['str_decrement(): Argument #1 ($string) "a" is out of decrement range', 'a'];
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yield ['str_decrement(): Argument #1 ($string) "A" is out of decrement range', 'A'];
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yield ['str_decrement(): Argument #1 ($string) "00" is out of decrement range', '00'];
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yield ['str_decrement(): Argument #1 ($string) "0a" is out of decrement range', '0a'];
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yield ['str_decrement(): Argument #1 ($string) "0A" is out of decrement range', '0A'];
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}
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}

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