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| # Internal utility functions for converting between Zarr and R data types. | ||
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| #' @keywords internal | ||
| get_dtype_rtype <- function(dtype) { | ||
| # Reference: https://github.com/gzuidhof/zarr.js/blob/292804/src/nestedArray/types.ts#L32 | ||
| DTYPE_RTYPE_MAPPING <- list( | ||
| "|b" = logical(), | ||
| "|u1" = integer(), | ||
| "|i1" = integer(), | ||
| "<b" = logical(), | ||
| "<u1" = integer(), | ||
| "<i1" = integer(), | ||
| "<u2" = integer(), | ||
| "<i2" = integer(), | ||
| "<u4" = integer(), | ||
| "<i4" = integer(), | ||
| "<f4" = double(), | ||
| "<f8" = double(), | ||
| ">b" = logical(), | ||
| ">u1" = integer(), | ||
| ">i1" = integer(), | ||
| ">u2" = integer(), | ||
| ">i2" = integer(), | ||
| ">u4" = integer(), | ||
| ">i4" = integer(), | ||
| ">f4" = double(), | ||
| ">f8" = double() | ||
| ) | ||
| return(DTYPE_RTYPE_MAPPING[[dtype]]) | ||
| # TODO: handle errors | ||
| #stop('Dtype not recognized or not supported in pizzarr') | ||
| } | ||
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| #' @keywords internal | ||
| get_dtype_endianness <- function(dtype) { | ||
| # TODO: use regexes to figure this stuff out | ||
| DTYPE_ENDIANNESS_MAPPING <- list( | ||
| "|b" = "nr", | ||
| "|u1" = "nr", | ||
| "|i1" = "nr", | ||
| "<b" = "little", | ||
| "<u1" = "little", | ||
| "<i1" = "little", | ||
| "<u2" = "little", | ||
| "<i2" = "little", | ||
| "<u4" = "little", | ||
| "<i4" = "little", | ||
| "<f4" = "little", | ||
| "<f8" = "little", | ||
| ">b" = "big", | ||
| ">u1" = "big", | ||
| ">i1" = "big", | ||
| ">u2" = "big", | ||
| ">i2" = "big", | ||
| ">u4" = "big", | ||
| ">i4" = "big", | ||
| ">f4" = "big", | ||
| ">f8" = "big" | ||
| ) | ||
| return(DTYPE_ENDIANNESS_MAPPING[[dtype]]) | ||
| } | ||
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| #' @keywords internal | ||
| get_dtype_numbytes <- function(dtype) { | ||
| # TODO: use regexes to figure this stuff out | ||
| DTYPE_NUMBYTES_MAPPING <- list( | ||
| "|b" = 1, | ||
| "|u1" = 1, | ||
| "|i1" = 1, | ||
| "<b" = 1, | ||
| "<u1" = 1, | ||
| "<i1" = 1, | ||
| "<u2" = 2, | ||
| "<i2" = 2, | ||
| "<u4" = 4, | ||
| "<i4" = 4, | ||
| "<f4" = 4, | ||
| "<f8" = 8, | ||
| ">b" = 1, | ||
| ">u1" = 1, | ||
| ">i1" = 1, | ||
| ">u2" = 2, | ||
| ">i2" = 2, | ||
| ">u4" = 4, | ||
| ">i4" = 4, | ||
| ">f4" = 4, | ||
| ">f8" = 8 | ||
| ) | ||
| return(DTYPE_NUMBYTES_MAPPING[[dtype]]) | ||
| } | ||
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| #' @keywords internal | ||
| get_dtype_from_array <- function(a) { | ||
| TYPEOF_RTYPE_MAPPING <- list( | ||
| "logical" = logical(), | ||
| "integer" = integer(), | ||
| "double" = double() | ||
| ) | ||
| RTYPE_DTYPE_MAPPING <- list( | ||
| "logical" = "|b", | ||
| "integer" = "<i4", | ||
| "double" = "<f8" | ||
| ) | ||
| rtype_str <- typeof(a) | ||
| return(RTYPE_DTYPE_MAPPING[[rtype_str]]) | ||
| } | ||
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| #' @keywords internal | ||
| get_dtype_asrtype <- function(dtype) { | ||
| # Reference: https://github.com/gzuidhof/zarr.js/blob/292804/src/nestedArray/types.ts#L32 | ||
| DTYPE_RTYPE_MAPPING <- list( | ||
| "|b" = as.logical, | ||
| "|u1" = as.integer, | ||
| "|i1" = as.integer, | ||
| "<b" = as.logical, | ||
| "<u1" = as.integer, | ||
| "<i1" = as.integer, | ||
| "<u2" = as.integer, | ||
| "<i2" = as.integer, | ||
| "<u4" = as.integer, | ||
| "<i4" = as.integer, | ||
| "<f4" = as.double, | ||
| "<f8" = as.double, | ||
| ">b" = as.logical, | ||
| ">u1" = as.integer, | ||
| ">i1" = as.integer, | ||
| ">u2" = as.integer, | ||
| ">i2" = as.integer, | ||
| ">u4" = as.integer, | ||
| ">i4" = as.integer, | ||
| ">f4" = as.double, | ||
| ">f8" = as.double | ||
| ) | ||
| return(DTYPE_RTYPE_MAPPING[[dtype]]) | ||
| # TODO: handle errors | ||
| #stop('Dtype not recognized or not supported in pizzarr') | ||
| } | ||
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| #' @keywords internal | ||
| get_typed_array_ctr <- function(dtype) { | ||
| rtype <- get_dtype_rtype(dtype) | ||
| return(function(dim) array(data = rtype, dim = dim)) | ||
| } |