Convert raw data into 8, 16, or 32-bit signed or unsigned integer values, conform Amiga specifications.
rawToAmigaInt(x, bits = 8, signed = F)
A vector of class
Number of bits that represents the integer value. Should be 8 or a positive multitude of 8.
The Commodore Amiga has specified the following data formats to represent integer data: BYTE (signed 8-bit integer), UBYTE (unsigned 8-bit integer), WORD (signed 16-bit integer), UWORD (unsigned 16-bit integer), LONG (signed 32-bit integer), ULONG, (unsigned 32-bit integer). This function converts raw data into such integers. Note that WORD and UWORD are also referred to as SHORT and USHORT respectively.
numeric value (or a
vector of values),
representing the integer data represented by the provided
raw data. Note that R defines
integer as 32-bit
signed integers and cannot store the 32-bit signed values.
numeric value is returned rather than an
Pepijn de Vries
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## Let's start by obtaining unsigned 8-bit integers: rawToAmigaInt(as.raw(0:255)) ## note that this is the same as: as.numeric(as.raw(0:255)) ## but with this function we can also get signed values: rawToAmigaInt(as.raw(0:255), signed = TRUE) ## Furthermore 32 or 16-bit integers can also be obtained. ## Let's look at 16-bit integers: rawToAmigaInt(as.raw(0:255), 16) ## Note that 16-bit integers require twice as many bytes ## as 8 bit integers: length(rawToAmigaInt(as.raw(0:255), 16)) length(rawToAmigaInt(as.raw(0:255), 8))
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