base64-string-to-usb8-array

Arguments: string &key start end output

This function converts the base64 string which is the value of string to an (unsigned-byte 8) array (with the six bits of the first converted character of string becoming the most significant six bit of the first element of the result array and so on). Two values are returned: the array and the number of bytes added to the returned array.

The start and end keyword argument specify the portion of the input string to convert. If unspecified, the whole string is used.

The output keyword argument allows specification of a (unsigned-byte 8) array in which to place the result. The result whill be written into the output array starting at index 0. The number of bytes written is the second returned value. If the output array is not large enough to hold the result or if output is unspecified or nil, a new array is created abd returned.

See the function usb8-array-to-base64-string which is the inverse of this function (the page for usb8-array-to-base64-string includes examples).

See Base64 Support in miscellaneous.htm for information on Base64 and Base64 support in Allegro CL.

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This page was not revised from the 8.1 page.
Created 2010.1.21.