QuickHashIntHash::loadFromFile
(PECL quickhash >= Unknown)
QuickHashIntHash::loadFromFile — This factory method creates a hash from a file
Описание
$filename
[, int $options
] )This factory method creates a new hash from a definition file on disk. The file format consists of a signature 'QH\0x11\0', the number of elements as a 32 bit signed integer in system Endianness, followed by 32 bit signed integers packed together in the Endianness that the system that the code runs on uses. For each hash element there are two 32 bit signed integers stored. The first of each element is the key, and the second is the value belonging to the key. An example could be:
Пример #1 QuickHash IntHash file format
00000000 51 48 11 00 02 00 00 00 01 00 00 00 01 00 00 00 |QH..............| 00000010 03 00 00 00 09 00 00 00 |........| 00000018
Пример #2 QuickHash IntHash file format
header signature ('QH'; key type: 1; value type: 1; filler: \0x00)
00000000 51 48 11 00
number of elements:
00000004 02 00 00 00
data string:
00000000 01 00 00 00 01 00 00 00 03 00 00 00 09 00 00 00
key/value 1 (key = 1, value = 1)
01 00 00 00 01 00 00 00
key/value 2 (key = 3, value = 9)
03 00 00 00 09 00 00 00
Список параметров
-
filename -
The filename of the file to read the hash from.
-
options -
The same options that the class' constructor takes; except that the size option is ignored. It is automatically calculated to be the same as the number of entries in the hash, rounded up to the nearest power of two with a maximum limit of 4194304.
Возвращаемые значения
Returns a new QuickHashIntHash.
Примеры
Пример #3 QuickHashIntHash::loadFromFile() example
<?php
$file = dirname( __FILE__ ) . "/simple.hash";
$hash = QuickHashIntHash::loadFromFile(
$file,
QuickHashIntHash::DO_NOT_USE_ZEND_ALLOC
);
foreach( range( 0, 0x0f ) as $key )
{
printf( "Key %3d (%2x) is %s\n",
$key, $key,
$hash->exists( $key ) ? 'set' : 'unset'
);
}
?>
Результатом выполнения данного примера будет что-то подобное:
Key 0 ( 0) is unset Key 1 ( 1) is set Key 2 ( 2) is set Key 3 ( 3) is set Key 4 ( 4) is unset Key 5 ( 5) is set Key 6 ( 6) is unset Key 7 ( 7) is set Key 8 ( 8) is unset Key 9 ( 9) is unset Key 10 ( a) is unset Key 11 ( b) is set Key 12 ( c) is unset Key 13 ( d) is set Key 14 ( e) is unset Key 15 ( f) is unset
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- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения, относящиеся к переменным и типам
- Quickhash
- Функция QuickHashIntHash::add() - This method adds a new entry to the hash
- Функция QuickHashIntHash::__construct() - Creates a new QuickHashIntHash object
- Функция QuickHashIntHash::delete() - This method deletes am entry from the hash
- Функция QuickHashIntHash::exists() - This method checks whether a key is part of the hash
- Функция QuickHashIntHash::get() - This method retrieves a value from the hash by its key
- Функция QuickHashIntHash::getSize() - Returns the number of elements in the hash
- Функция QuickHashIntHash::loadFromFile() - This factory method creates a hash from a file
- Функция QuickHashIntHash::loadFromString() - This factory method creates a hash from a string
- Функция QuickHashIntHash::saveToFile() - This method stores an in-memory hash to disk
- Функция QuickHashIntHash::saveToString() - This method returns a serialized version of the hash
- QuickHashIntHash::set
- Функция QuickHashIntHash::update() - This method updates an entry in the hash with a new value
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