Find spots in a raw vector that match a given byte sequence.

matchBytes(input, b1, ...)

Arguments

input

a vector of raw (byte) values.

b1

a vector of bytes to match (must be of length 2 or 3 at present; for 1-byte, use which()).

...

additional bytes to match for (up to 2 permitted)

Value

List of the indices of input that match the start of the bytes sequence (see example).

Examples

buf <- as.raw(c(0xa5, 0x11, 0xaa, 0xa5, 0x11, 0x00)) match <- matchBytes(buf, 0xa5, 0x11) print(buf)
#> [1] a5 11 aa a5 11 00
print(match)
#> [1] 1 4