Оставить заявку
Заказать звонок
г. Москва, ул. Бутлерова, д. 17, офис 3013. На карте

Глоссарий терминов Oracle

    base 64 encoding
    Перевод кодирование по алгоритму Base 64
    Описание Extended rowids use a base 64 encoding of the physical address for each row selected. The encoding characters are A-Z, a-z, 0-9, + and /.";"A file format using 64 (ASCII) characters to encode the six bit {binary data} values 0-63. To convert data to base 64 the first byte is placed in the most significant eight bits of a 24-bit buffer the next in the middle eight and the third in the least significant eight bits. If there a fewer than three bytes to encode the corresponding buffer bits will be zero. The buffer is then used six bits at a time most significant first as indices into the string "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" and the indicated character output. If there were only one or two input bytes the output is padded with two or one "=" characters respectively. This prevents extra bits being added to the reconstructed data. The process then repeats on the remaining input data. Base 64 is used when transmitting binary data through text-only media such as {electronic mail} though {uuencode} is more common.