getid3_matroska::EBML2Int() private WP 1.0

Это метод класса: getid3_matroska{}

Хуков нет.

Возвращает

Число/float/false.

Использование

$result = getid3_matroska::EBML2Int( $EBMLstring );

$EBMLstring(строка) (обязательный)

Код getid3_matroska::EBML2Int() getid3 matroska::EBML2Int ^{WP 5.5.1}

<?php
private static function EBML2Int($EBMLstring) {
	// http://matroska.org/specs/

	// Element ID coded with an UTF-8 like system:
	// 1xxx xxxx                                  - Class A IDs (2^7 -2 possible values) (base 0x8X)
	// 01xx xxxx  xxxx xxxx                       - Class B IDs (2^14-2 possible values) (base 0x4X 0xXX)
	// 001x xxxx  xxxx xxxx  xxxx xxxx            - Class C IDs (2^21-2 possible values) (base 0x2X 0xXX 0xXX)
	// 0001 xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx - Class D IDs (2^28-2 possible values) (base 0x1X 0xXX 0xXX 0xXX)
	// Values with all x at 0 and 1 are reserved (hence the -2).

	// Data size, in octets, is also coded with an UTF-8 like system :
	// 1xxx xxxx                                                                              - value 0 to  2^7-2
	// 01xx xxxx  xxxx xxxx                                                                   - value 0 to 2^14-2
	// 001x xxxx  xxxx xxxx  xxxx xxxx                                                        - value 0 to 2^21-2
	// 0001 xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx                                             - value 0 to 2^28-2
	// 0000 1xxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx                                  - value 0 to 2^35-2
	// 0000 01xx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx                       - value 0 to 2^42-2
	// 0000 001x  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx            - value 0 to 2^49-2
	// 0000 0001  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx  xxxx xxxx - value 0 to 2^56-2

	$first_byte_int = ord($EBMLstring[0]);
	if (0x80 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x7F);
	} elseif (0x40 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x3F);
	} elseif (0x20 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x1F);
	} elseif (0x10 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x0F);
	} elseif (0x08 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x07);
	} elseif (0x04 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x03);
	} elseif (0x02 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x01);
	} elseif (0x01 & $first_byte_int) {
		$EBMLstring[0] = chr($first_byte_int & 0x00);
	}

	return getid3_lib::BigEndian2Int($EBMLstring);
}