45 lines
1.3 KiB
OCaml
45 lines
1.3 KiB
OCaml
let get_bytecode ?(json = false) data =
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let backslash = if json then "\\\\" else "\\" in
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let result =
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List.map
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(fun byte ->
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let code = Char.code byte in
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if code >= 65 && code <= 122
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then String.make 1 byte
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else Printf.sprintf "%sx%02X" backslash code)
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(List.of_seq (Bytes.to_seq data))
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in
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String.concat "" result
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;;
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let get_obj_size obj = Obj.size (Obj.repr obj)
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let new_buffer size list =
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let buffer = Bytes.create size in
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let verification =
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List.fold_left
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(fun acc field ->
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Bytes.set_uint16_be buffer acc field;
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acc + 2)
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0
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list
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in
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if verification != size then failwith "Issue converting header to bytes";
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buffer
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;;
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let unpack_short_be data offset =
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let msb = int_of_char (Bytes.get data offset) in
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let lsb = int_of_char (Bytes.get data (offset + 1)) in
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(msb lsl 8) + lsb
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;;
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let unpack_int_be data offset =
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let byte1 = int_of_char (Bytes.get data offset) in
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let byte2 = int_of_char (Bytes.get data (offset + 1)) in
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let byte3 = int_of_char (Bytes.get data (offset + 2)) in
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let byte4 = int_of_char (Bytes.get data (offset + 3)) in
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(byte1 lsl 24) lor (byte2 lsl 16) lor (byte3 lsl 8) lor byte4
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;;
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let bytes_forward data offset = Bytes.sub data offset (Bytes.length data - offset)
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