Create, test, and coerce A5 cell index vectors. Cells are stored as
a record with eight raw-byte fields (b1–b8) representing the
little-endian bytes of the u64 cell ID. This avoids the precision
loss of floating-point storage and keeps memory compact.
Usage
a5_cell(x = character())
is_a5_cell(x)
as_a5_cell(x)
a5_is_valid(x)
Arguments
- x
A character vector of hex-encoded A5 cell IDs, or an object
coercible to one.
Value
An a5_cell vector (a5_cell, as_a5_cell), a logical
scalar (is_a5_cell), or a logical vector (a5_is_valid).
Examples
cells <- a5_cell(c("0800000000000006", "0800000000000016"))
cells
#> <a5_cell[2]>
#> [1] 0800000000000006 0800000000000016
a5_is_valid(c("0800000000000006", "not_a_cell", NA))
#> [1] TRUE FALSE NA
