BloombergLP::bdlbb::BlobUtil::findBufferIndexAndOffset

Return a value, designated here as p, such that for the specified blob, blob.buffer(p.first) is the buffer that contains the byte at the specified position in blob, and p.second is the offset corresponding to position within said buffer. The behavior of this function is undefined unless 0 <= position, 0 < blob.totalSize(), and position < blob.totalSize(). Note that (1) subsequent changes to blob may invalidate the result of this function, and (2) p.first never indicates a zero‐size buffer.