ACC SHELL
<?php
/**
* This file is part of the Nette Framework (http://nette.org)
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*/
namespace Nette\Utils;
use Nette;
/**
* String tools library.
*
* @author David Grudl
*/
class Strings
{
/**
* Static class - cannot be instantiated.
*/
final public function __construct()
{
throw new Nette\StaticClassException;
}
/**
* Checks if the string is valid for UTF-8 encoding.
* @param string byte stream to check
* @return bool
*/
public static function checkEncoding($s)
{
if (func_num_args() > 1 && strcasecmp(func_get_arg(1), 'UTF-8')) {
trigger_error(__METHOD__ . ' supports only UTF-8 encoding.', E_USER_DEPRECATED);
}
return $s === self::fixEncoding($s);
}
/**
* Removes invalid code unit sequences from UTF-8 string.
* @param string byte stream to fix
* @return string
*/
public static function fixEncoding($s)
{
if (func_num_args() > 1 && strcasecmp(func_get_arg(1), 'UTF-8')) {
trigger_error(__METHOD__ . ' supports only UTF-8 encoding.', E_USER_DEPRECATED);
}
// removes xD800-xDFFF, x110000 and higher
if (PHP_VERSION_ID < 50400) {
return @iconv('UTF-16', 'UTF-8//IGNORE', iconv('UTF-8', 'UTF-16//IGNORE', $s)); // intentionally @
} else {
return htmlspecialchars_decode(htmlspecialchars($s, ENT_NOQUOTES | ENT_IGNORE, 'UTF-8'), ENT_NOQUOTES);
}
}
/**
* Returns a specific character in UTF-8.
* @param int codepoint
* @return string
*/
public static function chr($code)
{
if (func_num_args() > 1 && strcasecmp(func_get_arg(1), 'UTF-8')) {
trigger_error(__METHOD__ . ' supports only UTF-8 encoding.', E_USER_DEPRECATED);
}
return iconv('UTF-32BE', 'UTF-8//IGNORE', pack('N', $code));
}
/**
* Starts the $haystack string with the prefix $needle?
* @param string
* @param string
* @return bool
*/
public static function startsWith($haystack, $needle)
{
return strncmp($haystack, $needle, strlen($needle)) === 0;
}
/**
* Ends the $haystack string with the suffix $needle?
* @param string
* @param string
* @return bool
*/
public static function endsWith($haystack, $needle)
{
return strlen($needle) === 0 || substr($haystack, -strlen($needle)) === $needle;
}
/**
* Does $haystack contain $needle?
* @param string
* @param string
* @return bool
*/
public static function contains($haystack, $needle)
{
return strpos($haystack, $needle) !== FALSE;
}
/**
* Returns a part of UTF-8 string.
* @param string
* @param int in characters (code points)
* @param int in characters (code points)
* @return string
*/
public static function substring($s, $start, $length = NULL)
{
if (function_exists('mb_substr')) {
if ($length === NULL && PHP_VERSION_ID < 50408) {
$length = self::length($s);
}
return mb_substr($s, $start, $length, 'UTF-8'); // MB is much faster
} elseif ($length === NULL) {
$length = self::length($s);
} elseif ($start < 0 && $length < 0) {
$start += self::length($s); // unifies iconv_substr behavior with mb_substr
}
return iconv_substr($s, $start, $length, 'UTF-8');
}
/**
* Removes special controls characters and normalizes line endings and spaces.
* @param string UTF-8 encoding or 8-bit
* @return string
*/
public static function normalize($s)
{
$s = self::normalizeNewLines($s);
// remove control characters; leave \t + \n
$s = preg_replace('#[\x00-\x08\x0B-\x1F\x7F]+#', '', $s);
// right trim
$s = preg_replace('#[\t ]+$#m', '', $s);
// leading and trailing blank lines
$s = trim($s, "\n");
return $s;
}
/**
* Standardize line endings to unix-like.
* @param string UTF-8 encoding or 8-bit
* @return string
*/
public static function normalizeNewLines($s)
{
return str_replace(array("\r\n", "\r"), "\n", $s);
}
/**
* Converts to ASCII.
* @param string UTF-8 encoding
* @return string ASCII
*/
public static function toAscii($s)
{
$s = preg_replace('#[^\x09\x0A\x0D\x20-\x7E\xA0-\x{2FF}\x{370}-\x{10FFFF}]#u', '', $s);
$s = strtr($s, '`\'"^~?', "\x01\x02\x03\x04\x05\x06");
$s = str_replace(array("\xE2\x80\x9E", "\xE2\x80\x9C", "\xE2\x80\x9D", "\xE2\x80\x9A",
"\xE2\x80\x98", "\xE2\x80\x99", "\xC2\xBB", "\xC2\xAB"),
array("\x03", "\x03", "\x03", "\x02", "\x02", "\x02", ">>", "<<"), $s);
if (ICONV_IMPL === 'glibc') {
$s = @iconv('UTF-8', 'WINDOWS-1250//TRANSLIT', $s); // intentionally @
$s = strtr($s, "\xa5\xa3\xbc\x8c\xa7\x8a\xaa\x8d\x8f\x8e\xaf\xb9\xb3\xbe\x9c\x9a\xba\x9d\x9f\x9e"
. "\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3"
. "\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8"
. "\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xfe\x96",
"ALLSSSSTZZZallssstzzzRAAAALCCCEEEEIIDDNNOOOOxRUUUUYTsraaaalccceeeeiiddnnooooruuuuyt-");
} else {
$s = @iconv('UTF-8', 'ASCII//TRANSLIT', $s); // intentionally @
}
$s = str_replace(array('`', "'", '"', '^', '~', '?'), '', $s);
return strtr($s, "\x01\x02\x03\x04\x05\x06", '`\'"^~?');
}
/**
* Converts to web safe characters [a-z0-9-] text.
* @param string UTF-8 encoding
* @param string allowed characters
* @param bool
* @return string
*/
public static function webalize($s, $charlist = NULL, $lower = TRUE)
{
$s = self::toAscii($s);
if ($lower) {
$s = strtolower($s);
}
$s = preg_replace('#[^a-z0-9' . preg_quote($charlist, '#') . ']+#i', '-', $s);
$s = trim($s, '-');
return $s;
}
/**
* Truncates string to maximal length.
* @param string UTF-8 encoding
* @param int
* @param string UTF-8 encoding
* @return string
*/
public static function truncate($s, $maxLen, $append = "\xE2\x80\xA6")
{
if (self::length($s) > $maxLen) {
$maxLen = $maxLen - self::length($append);
if ($maxLen < 1) {
return $append;
} elseif ($matches = self::match($s, '#^.{1,'.$maxLen.'}(?=[\s\x00-/:-@\[-`{-~])#us')) {
return $matches[0] . $append;
} else {
return self::substring($s, 0, $maxLen) . $append;
}
}
return $s;
}
/**
* Indents the content from the left.
* @param string UTF-8 encoding or 8-bit
* @param int
* @param string
* @return string
*/
public static function indent($s, $level = 1, $chars = "\t")
{
if ($level > 0) {
$s = self::replace($s, '#(?:^|[\r\n]+)(?=[^\r\n])#', '$0' . str_repeat($chars, $level));
}
return $s;
}
/**
* Convert to lower case.
* @param string UTF-8 encoding
* @return string
*/
public static function lower($s)
{
return mb_strtolower($s, 'UTF-8');
}
/**
* Convert to upper case.
* @param string UTF-8 encoding
* @return string
*/
public static function upper($s)
{
return mb_strtoupper($s, 'UTF-8');
}
/**
* Convert first character to upper case.
* @param string UTF-8 encoding
* @return string
*/
public static function firstUpper($s)
{
return self::upper(self::substring($s, 0, 1)) . self::substring($s, 1);
}
/**
* Capitalize string.
* @param string UTF-8 encoding
* @return string
*/
public static function capitalize($s)
{
return mb_convert_case($s, MB_CASE_TITLE, 'UTF-8');
}
/**
* Case-insensitive compares UTF-8 strings.
* @param string
* @param string
* @param int
* @return bool
*/
public static function compare($left, $right, $len = NULL)
{
if ($len < 0) {
$left = self::substring($left, $len, -$len);
$right = self::substring($right, $len, -$len);
} elseif ($len !== NULL) {
$left = self::substring($left, 0, $len);
$right = self::substring($right, 0, $len);
}
return self::lower($left) === self::lower($right);
}
/**
* Finds the length of common prefix of strings.
* @param string|array
* @return string
*/
public static function findPrefix($strings)
{
if (!is_array($strings)) {
$strings = func_get_args();
}
$first = array_shift($strings);
for ($i = 0; $i < strlen($first); $i++) {
foreach ($strings as $s) {
if (!isset($s[$i]) || $first[$i] !== $s[$i]) {
while ($i && $first[$i-1] >= "\x80" && $first[$i] >= "\x80" && $first[$i] < "\xC0") {
$i--;
}
return substr($first, 0, $i);
}
}
}
return $first;
}
/**
* Returns number of characters (not bytes) in UTF-8 string.
* That is the number of Unicode code points which may differ from the number of graphemes.
* @param string
* @return int
*/
public static function length($s)
{
return function_exists('mb_strlen') ? mb_strlen($s, 'UTF-8') : strlen(utf8_decode($s));
}
/**
* Strips whitespace.
* @param string UTF-8 encoding
* @param string
* @return string
*/
public static function trim($s, $charlist = " \t\n\r\0\x0B\xC2\xA0")
{
$charlist = preg_quote($charlist, '#');
return self::replace($s, '#^['.$charlist.']+|['.$charlist.']+\z#u', '');
}
/**
* Pad a string to a certain length with another string.
* @param string UTF-8 encoding
* @param int
* @param string
* @return string
*/
public static function padLeft($s, $length, $pad = ' ')
{
$length = max(0, $length - self::length($s));
$padLen = self::length($pad);
return str_repeat($pad, $length / $padLen) . self::substring($pad, 0, $length % $padLen) . $s;
}
/**
* Pad a string to a certain length with another string.
* @param string UTF-8 encoding
* @param int
* @param string
* @return string
*/
public static function padRight($s, $length, $pad = ' ')
{
$length = max(0, $length - self::length($s));
$padLen = self::length($pad);
return $s . str_repeat($pad, $length / $padLen) . self::substring($pad, 0, $length % $padLen);
}
/**
* Reverse string.
* @param string UTF-8 encoding
* @return string
*/
public static function reverse($s)
{
return @iconv('UTF-32LE', 'UTF-8', strrev(@iconv('UTF-8', 'UTF-32BE', $s)));
}
/**
* Use Nette\Utils\Random::generate
* @deprecated
*/
public static function random($length = 10, $charlist = '0-9a-z')
{
return Random::generate($length, $charlist);
}
/**
* Splits string by a regular expression.
* @param string
* @param string
* @param int
* @return array
*/
public static function split($subject, $pattern, $flags = 0)
{
return self::pcre('preg_split', array($pattern, $subject, -1, $flags | PREG_SPLIT_DELIM_CAPTURE));
}
/**
* Performs a regular expression match.
* @param string
* @param string
* @param int can be PREG_OFFSET_CAPTURE (returned in bytes)
* @param int offset in bytes
* @return mixed
*/
public static function match($subject, $pattern, $flags = 0, $offset = 0)
{
if ($offset > strlen($subject)) {
return NULL;
}
return self::pcre('preg_match', array($pattern, $subject, & $m, $flags, $offset))
? $m
: NULL;
}
/**
* Performs a global regular expression match.
* @param string
* @param string
* @param int can be PREG_OFFSET_CAPTURE (returned in bytes); PREG_SET_ORDER is default
* @param int offset in bytes
* @return array
*/
public static function matchAll($subject, $pattern, $flags = 0, $offset = 0)
{
if ($offset > strlen($subject)) {
return array();
}
self::pcre('preg_match_all', array(
$pattern, $subject, & $m,
($flags & PREG_PATTERN_ORDER) ? $flags : ($flags | PREG_SET_ORDER),
$offset
));
return $m;
}
/**
* Perform a regular expression search and replace.
* @param string
* @param string|array
* @param string|callable
* @param int
* @return string
*/
public static function replace($subject, $pattern, $replacement = NULL, $limit = -1)
{
if (is_object($replacement) || is_array($replacement)) {
if ($replacement instanceof Nette\Callback) {
$replacement = $replacement->getNative();
}
if (!is_callable($replacement, FALSE, $textual)) {
throw new Nette\InvalidStateException("Callback '$textual' is not callable.");
}
return self::pcre('preg_replace_callback', array($pattern, $replacement, $subject, $limit));
} elseif ($replacement === NULL && is_array($pattern)) {
$replacement = array_values($pattern);
$pattern = array_keys($pattern);
}
return self::pcre('preg_replace', array($pattern, $replacement, $subject, $limit));
}
/** @internal */
public static function pcre($func, $args)
{
$res = Callback::invokeSafe($func, $args, function($message) use ($args) {
// compile-time error, not detectable by preg_last_error
throw new RegexpException($message . ' in pattern: ' . implode(' or ', (array) $args[0]));
});
if (($code = preg_last_error()) // run-time error, but preg_last_error & return code are liars
&& ($res === NULL || !in_array($func, array('preg_filter', 'preg_replace_callback', 'preg_replace')))
) {
throw new RegexpException(NULL, $code, implode(' or ', (array) $args[0]));
}
return $res;
}
}
/**
* The exception that indicates error of the last Regexp execution.
*/
class RegexpException extends \Exception
{
static public $messages = array(
PREG_INTERNAL_ERROR => 'Internal error',
PREG_BACKTRACK_LIMIT_ERROR => 'Backtrack limit was exhausted',
PREG_RECURSION_LIMIT_ERROR => 'Recursion limit was exhausted',
PREG_BAD_UTF8_ERROR => 'Malformed UTF-8 data',
5 => 'Offset didn\'t correspond to the begin of a valid UTF-8 code point', // PREG_BAD_UTF8_OFFSET_ERROR
);
public function __construct($message, $code = NULL, $pattern = NULL)
{
if (!$message) {
$message = (isset(self::$messages[$code]) ? self::$messages[$code] : 'Unknown error') . ($pattern ? " (pattern: $pattern)" : '');
}
parent::__construct($message, $code);
}
}
ACC SHELL 2018