llIntegerToBase64

string llIntegerToBase64(integer Value)

Returns a string that is a Base64 big endian encode of Value.

Encodes the Value as an 8-character Base64 string.

Parameters

Value (integer)

Technical Details

Return Type: string
Energy: 10

Converting ASCII Character to Base64

string ASCII7ToString(integer letter)
{
    if(letter >= 0x80 || letter < 0) return "";//Not valid ascii7 character
    return llBase64ToString(llIntegerToBase64(letter << 24));
}

Packing and Unpacking 24-bit Values

// Packs a 24-bit unsigned integer value (0-16777215) to only 4 Base64 characters.
string Int24ToBase64(integer value)
{
    return llGetSubString(llIntegerToBase64(value<<8), 0, 3);
}

// unpacks a 4-character Base64 value to a 24-bit unsigned integer
integer Base64ToInt24(string value)
{
    return (llBase64ToInteger(value)>>8)&0xffffff; // Masking required to remove sign extension from bit-shifting
}

Notes

Only the first 6 of the 8 characters returned are needed to decode it back into an integer. The padding == can be safely removed for storage.
“Big-endian” refers to the fact that the most significant (highest byte) of the integer is processed first: the first characters in the returned Base64 string correspond to this byte, and the last characters correspond to the least significant byte.
Combined with bit-shifting, removing characters from the Base64 string allows more efficient packing of small values. For specifics, see the caveats section in llBase64ToInteger.

llIntegerToBase64

Converting ASCII Character to Base64

Packing and Unpacking 24-bit Values

Notes

See Also