package vcaml
OCaml bindings for the Neovim API
Install
Dune Dependency
Authors
Maintainers
Sources
vcaml-v0.15.0.tar.gz
sha256=0dbf2526a24d838988ae9a327550fdd9f0328dbdca9d026430fb4b579e0e0442
doc/src/vcaml.msgpack/serializer.ml.html
Source file serializer.ml
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open! Base open Faraday open Message (* This is currently written with little to no concern about the efficiency of the serializer. If performance is necessary, we would want to keep a closer eye on the internal buffer and flush occasionally. *) let rec dispatch t = function | Nil -> write_nil t | Integer i -> write_int t i | UInt64 i -> write_uint64 t i | Int64 i -> write_signed_integer t i | Boolean b -> write_bool t b | Floating f -> write_float t f | Array vs -> write_array t vs | Map kvs -> write_map t kvs | String s -> write_strval t s | Binary bs -> write_bin t bs | Extension ext -> write_ext t ext and write_nil t = write_char t Constants.nil and write_bool t b = match b with | true -> write_char t Constants.true_ | false -> write_char t Constants.false_ and write_int t i = if i >= 0 then write_nonnegative_integer t (Int64.of_int i) else write_signed_integer t (Int64.of_int i) and write_uint64 t i = write_char t Constants.uint64_header; BE.write_uint64 t i and write_nonnegative_integer t i = let open Int64.O in if i <= (2L ** 7L) - 1L then (* This fits into 8 bits, and we must have the top bit unset here *) write_uint8 t (Int64.to_int_exn i) else if i <= 0xFFL then ( write_char t Constants.uint8_header; write_uint8 t (Int64.to_int_exn i)) else if i <= 0xFFFFL then ( write_char t Constants.uint16_header; BE.write_uint16 t (Int64.to_int_exn i)) else if i <= 0xFFFF_FFFFL then ( write_char t Constants.uint32_header; let v = if i < 2L ** 31L then i else i - (2L ** 32L) in BE.write_uint32 t (Int64.to_int32_exn v)) else ( write_char t Constants.uint64_header; BE.write_uint64 t i) and write_signed_integer t i = let open Int64.O in if i >= 0L then write_nonnegative_integer t i else if -32L <= i then write_uint8 t (Int.( lor ) (Int64.to_int_exn i) Constants.negative_fixint_mask) else if -(2L ** 7L) <= i then ( write_char t Constants.int8_header; (* This is correct by properties of 2s complement arithmetic *) write_uint8 t (Int64.to_int_exn i)) else if -(2L ** 15L) <= i then ( write_char t Constants.int16_header; BE.write_uint16 t (Int64.to_int_exn i)) else if -(2L ** 31L) <= i then ( write_char t Constants.int32_header; BE.write_uint32 t (Int64.to_int32_exn i)) else ( write_char t Constants.int64_header; BE.write_uint64 t i) and write_float t f = write_char t Constants.float64_header; BE.write_double t f (* Don't shadow [Faraday.write_string]. *) and write_strval t s = let open Int.O in let len = String.length s in if len <= 31 then write_uint8 t (len lor Constants.fixstr_mask) else if len <= (2 ** 8) - 1 then ( write_char t Constants.str8_header; write_uint8 t len) else if len <= (2 ** 16) - 1 then ( write_char t Constants.str16_header; BE.write_uint16 t len) else ( write_char t Constants.str32_header; BE.write_uint32 t (Int32.of_int_exn len)); write_string t s and write_bin t b = let open Int.O in let len = Bytes.length b in if len <= (2 ** 8) - 1 then ( write_char t Constants.bin8_header; write_uint8 t len) else if len <= (2 ** 16) - 1 then ( write_char t Constants.bin16_header; BE.write_uint16 t len) else ( write_char t Constants.bin32_header; BE.write_uint32 t (Int32.of_int_exn len)); write_bytes t b and write_array t vs = let open Int.O in let len = List.length vs in if len <= 15 then write_uint8 t (len lor Constants.fixarray_mask) else if len <= (2 ** 16) - 1 then ( write_char t Constants.array16_header; BE.write_uint16 t len) else ( write_char t Constants.array32_header; BE.write_uint32 t (Int32.of_int_exn len)); List.iter ~f:(dispatch t) vs and write_map t kvs = let open Int.O in let len = List.length kvs in if len <= 15 then write_uint8 t (len lor Constants.fixmap_mask) else if len <= (2 ** 16) - 1 then ( write_char t Constants.map16_header; BE.write_uint16 t len) else ( write_char t Constants.map32_header; BE.write_uint32 t (Int32.of_int_exn len)); List.iter ~f:(fun (k, v) -> dispatch t k; dispatch t v) kvs (* The spec does not actually say what to do in the case that an extension type takes a number of bytes that falls between two of the fixed sizes. Here, we choose to represent that as an 8-bit chunk rather than padding with 0s, because those 0s may be meaningful to the end-user. *) and write_ext t { type_id; data } = let open Int.O in let len = Bytes.length data in if len = 1 then write_char t Constants.fixext1_header else if len = 2 then write_char t Constants.fixext2_header else if len = 4 then write_char t Constants.fixext4_header else if len = 8 then write_char t Constants.fixext8_header else if len = 16 then write_char t Constants.fixext16_header else if len <= (2 ** 8) - 1 then ( write_char t Constants.ext8_header; write_uint8 t len) else if len <= (2 ** 16) - 1 then ( write_char t Constants.ext16_header; BE.write_uint16 t len) else if len <= (2 ** 32) - 1 then ( write_char t Constants.ext32_header; BE.write_uint32 t (Int32.of_int_exn len)) else failwith "Ext data too large for messagepack format!"; write_uint8 t type_id; write_bytes t data ;; let message_to_string_exn ?(bufsize = 256) msg = let t = create bufsize in dispatch t msg; serialize_to_string t ;;
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