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encoding.ml
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(* This file is part of Markup.ml, released under the BSD 2-clause license. See doc/LICENSE for details, or visit https://github.com/aantron/markup.ml. *) open Common open Kstream type t = ?report:Error.parse_handler -> char Kstream.t -> int Kstream.t let wrap f = fun ?(report = Error.ignore_errors) s -> f report s let bytes_empty = Bytes.create 0 (* Decoders based on the Uutf library. *) let uutf_decoder encoding name = (fun report bytes -> let decoder = Uutf.decoder ~encoding `Manual in (fun throw empty k -> let rec run () = match Uutf.decode decoder with | `End -> empty () | `Uchar c -> k (Uchar.to_int c) | `Malformed s -> let location = Uutf.decoder_line decoder, Uutf.decoder_col decoder in report location (`Decoding_error (s, name)) throw (fun () -> k u_rep) | `Await -> next bytes throw (fun () -> Uutf.Manual.src decoder bytes_empty 0 0; run ()) (fun c -> Uutf.Manual.src decoder (Bytes.make 1 c) 0 1; run ()) in run ()) |> make) |> wrap let utf_8 : t = uutf_decoder `UTF_8 "utf-8" let utf_16be : t = uutf_decoder `UTF_16BE "utf-16be" let utf_16le : t = uutf_decoder `UTF_16LE "utf-16le" let iso_8859_1 : t = uutf_decoder `ISO_8859_1 "iso-8859-1" let us_ascii : t = uutf_decoder `US_ASCII "us-ascii" (* Chooses UTF-16LE unless the BE BOM is present, as in http://www.w3.org/TR/encoding/ *) let utf_16 : t = (fun report bytes -> let constructor = fun throw k -> peek_n 2 bytes throw (function | ['\xFE'; '\xFF'] -> k (utf_16be ~report bytes) | _ -> k (utf_16le ~report bytes)) in construct constructor) |> wrap let ucs_4_decoder arrange name = (fun report bytes -> let first = ref true in let line = ref 1 in let column = ref 1 in let char k c = column := !column + 1; k c in let newline k c = column := 1; line := !line + 1; k c in (fun throw empty k -> let rec run () = next_n 4 bytes throw begin function | [b1; b2; b3; b4] -> let low, b2', b3', high = arrange (b1, b2, b3, b4) in let low, b2', b3', high = Char.code low, Char.code b2', Char.code b3', Char.code high in if high land 0x80 <> 0 then let s = Printf.sprintf "%c%c%c%c" b1 b2 b3 b4 in report (!line, !column) (`Decoding_error (s, name)) throw (fun () -> char k u_rep) else let scalar = (high lsl 24) lor (b3' lsl 16) lor (b2' lsl 8) lor low in let skip = if !first then begin first := false; scalar = Uchar.to_int Uutf.u_bom end else false in if skip then run () else if scalar = 0x000A then newline k scalar else char k scalar | [] -> empty () | l -> let buffer = Buffer.create 4 in l |> List.iter (Buffer.add_char buffer); report (!line, !column) (`Decoding_error (Buffer.contents buffer, name)) throw (fun () -> char k u_rep) end in run ()) |> make) |> wrap let ucs_4be : t = ucs_4_decoder (fun (b1, b2, b3, b4) -> b4, b3, b2, b1) "ucs-4be" let ucs_4le : t = ucs_4_decoder (fun bs -> bs) "ucs-4le" let ucs_4be_transposed : t = ucs_4_decoder (fun (b1, b2, b3, b4) -> b3, b4, b1, b2) "ucs-4be-transposed" let ucs_4le_transposed : t = ucs_4_decoder (fun (b1, b2, b3, b4) -> b2, b1, b4, b3) "ucs-4le-transposed" let code_page table = if Array.length table < 256 then raise (Invalid_argument "Markup.Encoding.code_page: array does not have 256 entries"); (fun _ bytes -> (fun throw empty k -> next bytes throw empty (fun c -> k table.(Char.code c))) |> make) |> wrap let windows_1251_table = [| (* ASCII *) 0x0000; 0x0001; 0x0002; 0x0003; 0x0004; 0x0005; 0x0006; 0x0007; 0x0008; 0x0009; 0x000A; 0x000B; 0x000C; 0x000D; 0x000E; 0x000F; 0x0010; 0x0011; 0x0012; 0x0013; 0x0014; 0x0015; 0x0016; 0x0017; 0x0018; 0x0019; 0x001A; 0x001B; 0x001C; 0x001D; 0x001E; 0x001F; 0x0020; 0x0021; 0x0022; 0x0023; 0x0024; 0x0025; 0x0026; 0x0027; 0x0028; 0x0029; 0x002A; 0x002B; 0x002C; 0x002D; 0x002E; 0x002F; 0x0030; 0x0031; 0x0032; 0x0033; 0x0034; 0x0035; 0x0036; 0x0037; 0x0038; 0x0039; 0x003A; 0x003B; 0x003C; 0x003D; 0x003E; 0x003F; 0x0040; 0x0041; 0x0042; 0x0043; 0x0044; 0x0045; 0x0046; 0x0047; 0x0048; 0x0049; 0x004A; 0x004B; 0x004C; 0x004D; 0x004E; 0x004F; 0x0050; 0x0051; 0x0052; 0x0053; 0x0054; 0x0055; 0x0056; 0x0057; 0x0058; 0x0059; 0x005A; 0x005B; 0x005C; 0x005D; 0x005E; 0x005F; 0x0060; 0x0061; 0x0062; 0x0063; 0x0064; 0x0065; 0x0066; 0x0067; 0x0068; 0x0069; 0x006A; 0x006B; 0x006C; 0x006D; 0x006E; 0x006F; 0x0070; 0x0071; 0x0072; 0x0073; 0x0074; 0x0075; 0x0076; 0x0077; 0x0078; 0x0079; 0x007A; 0x007B; 0x007C; 0x007D; 0x007E; 0x007F; (* 0x8_ *) 0x0402; 0x0403; 0x201A; 0x0453; 0x201E; 0x2026; 0x2020; 0x2021; 0x20AC; 0x2030; 0x0409; 0x2039; 0x040A; 0x040C; 0x040B; 0x040F; (* 0x9_ *) 0x0452; 0x2018; 0x2019; 0x201C; 0x201D; 0x2022; 0x2013; 0x2014; 0xFFFD; 0x2122; 0x0459; 0x203A; 0x045A; 0x045C; 0x045B; 0x045F; (* 0xA_ *) 0x00A0; 0x040E; 0x045E; 0x0408; 0x00A4; 0x0490; 0x00A6; 0x00A7; 0x0401; 0x00A9; 0x0404; 0x00AB; 0x00AC; 0x00AD; 0x00AE; 0x0407; (* 0xB_ *) 0x00B0; 0x00B1; 0x0406; 0x0456; 0x0491; 0x00B5; 0x00B6; 0x00B7; 0x0451; 0x2116; 0x0454; 0x00BB; 0x0458; 0x0405; 0x0455; 0x0457; (* 0xC_ *) 0x0410; 0x0411; 0x0412; 0x0413; 0x0414; 0x0415; 0x0416; 0x0417; 0x0418; 0x0419; 0x041A; 0x041B; 0x041C; 0x041D; 0x041E; 0x041F; (* 0xD_ *) 0x0410; 0x0421; 0x0422; 0x0423; 0x0424; 0x0425; 0x0426; 0x0427; 0x0428; 0x0429; 0x042A; 0x042B; 0x042C; 0x042D; 0x042E; 0x042F; (* 0xE_ *) 0x0430; 0x0431; 0x0432; 0x0433; 0x0434; 0x0435; 0x0436; 0x0437; 0x0438; 0x0439; 0x043A; 0x043B; 0x043C; 0x043D; 0x043E; 0x043F; (* 0xF_ *) 0x0440; 0x0441; 0x0442; 0x0443; 0x0444; 0x0445; 0x0446; 0x0447; 0x0448; 0x0449; 0x044A; 0x044B; 0x044C; 0x044D; 0x044E; 0x044F |] let windows_1251 : t = code_page windows_1251_table let windows_1252_table = [| (* ASCII *) 0x0000; 0x0001; 0x0002; 0x0003; 0x0004; 0x0005; 0x0006; 0x0007; 0x0008; 0x0009; 0x000A; 0x000B; 0x000C; 0x000D; 0x000E; 0x000F; 0x0010; 0x0011; 0x0012; 0x0013; 0x0014; 0x0015; 0x0016; 0x0017; 0x0018; 0x0019; 0x001A; 0x001B; 0x001C; 0x001D; 0x001E; 0x001F; 0x0020; 0x0021; 0x0022; 0x0023; 0x0024; 0x0025; 0x0026; 0x0027; 0x0028; 0x0029; 0x002A; 0x002B; 0x002C; 0x002D; 0x002E; 0x002F; 0x0030; 0x0031; 0x0032; 0x0033; 0x0034; 0x0035; 0x0036; 0x0037; 0x0038; 0x0039; 0x003A; 0x003B; 0x003C; 0x003D; 0x003E; 0x003F; 0x0040; 0x0041; 0x0042; 0x0043; 0x0044; 0x0045; 0x0046; 0x0047; 0x0048; 0x0049; 0x004A; 0x004B; 0x004C; 0x004D; 0x004E; 0x004F; 0x0050; 0x0051; 0x0052; 0x0053; 0x0054; 0x0055; 0x0056; 0x0057; 0x0058; 0x0059; 0x005A; 0x005B; 0x005C; 0x005D; 0x005E; 0x005F; 0x0060; 0x0061; 0x0062; 0x0063; 0x0064; 0x0065; 0x0066; 0x0067; 0x0068; 0x0069; 0x006A; 0x006B; 0x006C; 0x006D; 0x006E; 0x006F; 0x0070; 0x0071; 0x0072; 0x0073; 0x0074; 0x0075; 0x0076; 0x0077; 0x0078; 0x0079; 0x007A; 0x007B; 0x007C; 0x007D; 0x007E; 0x007F; (* 0x8_ *) 0x20AC; 0x0081; 0x201A; 0x0192; 0x201E; 0x2026; 0x2020; 0x2021; 0x02C6; 0x2030; 0x0160; 0x2039; 0x0152; 0x008D; 0x017D; 0x008F; (* 0x9_ *) 0x0090; 0x2018; 0x2019; 0x201C; 0x201D; 0x2022; 0x2013; 0x2014; 0x02DC; 0x2122; 0x0161; 0x203A; 0x0153; 0x009D; 0x017E; 0x0178; (* ISO-8859-1 *) 0x00A0; 0x00A1; 0x00A2; 0x00A3; 0x00A4; 0x00A5; 0x00A6; 0x00A7; 0x00A8; 0x00A9; 0x00AA; 0x00AB; 0x00AC; 0x00AD; 0x00AE; 0x00AF; 0x00B0; 0x00B1; 0x00B2; 0x00B3; 0x00B4; 0x00B5; 0x00B6; 0x00B7; 0x00B8; 0x00B9; 0x00BA; 0x00BB; 0x00BC; 0x00BD; 0x00BE; 0x00BF; 0x00C0; 0x00C1; 0x00C2; 0x00C3; 0x00C4; 0x00C5; 0x00C6; 0x00C7; 0x00C8; 0x00C9; 0x00CA; 0x00CB; 0x00CC; 0x00CD; 0x00CE; 0x00CF; 0x00D0; 0x00D1; 0x00D2; 0x00D3; 0x00D4; 0x00D5; 0x00D6; 0x00D7; 0x00D8; 0x00D9; 0x00DA; 0x00DB; 0x00DC; 0x00DD; 0x00DE; 0x00DF; 0x00E0; 0x00E1; 0x00E2; 0x00E3; 0x00E4; 0x00E5; 0x00E6; 0x00E7; 0x00E8; 0x00E9; 0x00EA; 0x00EB; 0x00EC; 0x00ED; 0x00EE; 0x00EF; 0x00F0; 0x00F1; 0x00F2; 0x00F3; 0x00F4; 0x00F5; 0x00F6; 0x00F7; 0x00F8; 0x00F9; 0x00FA; 0x00FB; 0x00FC; 0x00FD; 0x00FE; 0x00FF |] let windows_1252 : t = code_page windows_1252_table let ebcdic_37_table = [| (* 0x0_ *) 0x0000; 0x0001; 0x0002; 0x0003; 0x009C; 0x0009; 0x0086; 0x007F; 0x0097; 0x008D; 0x008E; 0x000B; 0x000C; 0x000D; 0x000E; 0x000F; (* 0x1_ *) 0x0010; 0x0011; 0x0012; 0x0013; 0x009D; 0x0085; 0x0008; 0x0087; 0x0018; 0x0019; 0x0092; 0x008F; 0x001C; 0x001D; 0x001E; 0x001F; (* 0x2_ *) 0x0080; 0x0081; 0x0082; 0x0083; 0x0084; 0x000A; 0x0017; 0x001B; 0x0088; 0x0089; 0x008A; 0x008B; 0x008C; 0x0005; 0x0006; 0x0007; (* 0x3_ *) 0x0090; 0x0091; 0x0016; 0x0093; 0x0094; 0x0095; 0x0096; 0x0004; 0x0098; 0x0099; 0x009A; 0x009B; 0x0014; 0x0015; 0x009E; 0x001A; (* 0x4_ *) 0x0020; 0x00A0; 0x00E2; 0x00E4; 0x00E0; 0x00E1; 0x00E3; 0x00E5; 0x00E7; 0x00F1; 0x00A2; 0x002E; 0x003C; 0x0028; 0x002B; 0x007C; (* 0x5_ *) 0x0026; 0x00E9; 0x00EA; 0x00EB; 0x00E8; 0x00ED; 0x00EE; 0x00EF; 0x00EC; 0x00DF; 0x0021; 0x0024; 0x002A; 0x0029; 0x003B; 0x00AC; (* 0x6_ *) 0x002D; 0x002F; 0x00C2; 0x00C4; 0x00C0; 0x00C1; 0x00C3; 0x00C5; 0x00C7; 0x00D1; 0x00A6; 0x002C; 0x0025; 0x005F; 0x003E; 0x003F; (* 0x7_ *) 0x00F8; 0x00C9; 0x00CA; 0x00CB; 0x00C8; 0x00CD; 0x00CE; 0x00CF; 0x00CC; 0x0060; 0x003A; 0x0023; 0x0040; 0x0027; 0x003D; 0x0022; (* 0x8_ *) 0x00D8; 0x0061; 0x0062; 0x0063; 0x0064; 0x0065; 0x0066; 0x0067; 0x0068; 0x0069; 0x00AB; 0x00BB; 0x00F0; 0x00FD; 0x00FE; 0x00B1; (* 0x9_ *) 0x00B0; 0x006A; 0x006B; 0x006C; 0x006D; 0x006E; 0x006F; 0x0070; 0x0071; 0x0072; 0x00AA; 0x00BA; 0x00E6; 0x00B8; 0x00C6; 0x00A4; (* 0xA_ *) 0x00B5; 0x007E; 0x0073; 0x0074; 0x0075; 0x0076; 0x0077; 0x0078; 0x0079; 0x007A; 0x00A1; 0x00BF; 0x00D0; 0x00DD; 0x00DE; 0x00AE; (* 0xB_ *) 0x005E; 0x00A3; 0x00A5; 0x00B7; 0x00A9; 0x00A7; 0x00B6; 0x00BC; 0x00BD; 0x00BE; 0x005B; 0x005D; 0x00AF; 0x00A8; 0x00B4; 0x00D7; (* 0xC_ *) 0x007B; 0x0041; 0x0042; 0x0043; 0x0044; 0x0045; 0x0046; 0x0047; 0x0048; 0x0049; 0x00AD; 0x00F4; 0x00F6; 0x00F2; 0x00F3; 0x00F5; (* 0xD_ *) 0x007D; 0x004A; 0x004B; 0x004C; 0x004D; 0x004E; 0x004F; 0x0050; 0x0051; 0x0052; 0x00B9; 0x00FB; 0x00FC; 0x00F9; 0x00FA; 0x00FF; (* 0xE_ *) 0x005C; 0x00F7; 0x0053; 0x0054; 0x0055; 0x0056; 0x0057; 0x0058; 0x0059; 0x005A; 0x00B2; 0x00D4; 0x00D6; 0x00D2; 0x00D3; 0x00D5; (* 0xF_ *) 0x0030; 0x0031; 0x0032; 0x0033; 0x0034; 0x0035; 0x0036; 0x0037; 0x0038; 0x0039; 0x00B3; 0x00DB; 0x00DC; 0x00D9; 0x00DA; 0x009F |] let ebcdic : t = code_page ebcdic_37_table let iso_8859_15_table = [| (* ASCII *) 0x0000; 0x0001; 0x0002; 0x0003; 0x0004; 0x0005; 0x0006; 0x0007; 0x0008; 0x0009; 0x000A; 0x000B; 0x000C; 0x000D; 0x000E; 0x000F; 0x0010; 0x0011; 0x0012; 0x0013; 0x0014; 0x0015; 0x0016; 0x0017; 0x0018; 0x0019; 0x001A; 0x001B; 0x001C; 0x001D; 0x001E; 0x001F; 0x0020; 0x0021; 0x0022; 0x0023; 0x0024; 0x0025; 0x0026; 0x0027; 0x0028; 0x0029; 0x002A; 0x002B; 0x002C; 0x002D; 0x002E; 0x002F; 0x0030; 0x0031; 0x0032; 0x0033; 0x0034; 0x0035; 0x0036; 0x0037; 0x0038; 0x0039; 0x003A; 0x003B; 0x003C; 0x003D; 0x003E; 0x003F; 0x0040; 0x0041; 0x0042; 0x0043; 0x0044; 0x0045; 0x0046; 0x0047; 0x0048; 0x0049; 0x004A; 0x004B; 0x004C; 0x004D; 0x004E; 0x004F; 0x0050; 0x0051; 0x0052; 0x0053; 0x0054; 0x0055; 0x0056; 0x0057; 0x0058; 0x0059; 0x005A; 0x005B; 0x005C; 0x005D; 0x005E; 0x005F; 0x0060; 0x0061; 0x0062; 0x0063; 0x0064; 0x0065; 0x0066; 0x0067; 0x0068; 0x0069; 0x006A; 0x006B; 0x006C; 0x006D; 0x006E; 0x006F; 0x0070; 0x0071; 0x0072; 0x0073; 0x0074; 0x0075; 0x0076; 0x0077; 0x0078; 0x0079; 0x007A; 0x007B; 0x007C; 0x007D; 0x007E; 0x007F; (* ISO-8859-1 *) 0x0080; 0x0081; 0x0082; 0x0083; 0x0084; 0x0085; 0x0086; 0x0087; 0x0088; 0x0089; 0x008A; 0x008B; 0x008C; 0x008D; 0x008E; 0x008F; 0x0090; 0x0091; 0x0092; 0x0093; 0x0094; 0x0095; 0x0096; 0x0097; 0x0098; 0x0099; 0x009A; 0x009B; 0x009C; 0x009D; 0x009E; 0x009F; (* 0xA_ *) 0x00A0; 0x00A1; 0x00A2; 0x00A3; 0x20AC; 0x00A5; 0x0160; 0x00A7; 0x0161; 0x00A9; 0x00AA; 0x00AB; 0x00AC; 0x00AD; 0x00AE; 0x00AF; (* 0xB_ *) 0x00B0; 0x00B1; 0x00B2; 0x00B3; 0x017D; 0x00B5; 0x00B6; 0x00B7; 0x017E; 0x00B9; 0x00BA; 0x00BB; 0x0152; 0x0153; 0x0178; 0x00BF; (* ISO-8859-1 *) 0x00C0; 0x00C1; 0x00C2; 0x00C3; 0x00C4; 0x00C5; 0x00C6; 0x00C7; 0x00C8; 0x00C9; 0x00CA; 0x00CB; 0x00CC; 0x00CD; 0x00CE; 0x00CF; 0x00D0; 0x00D1; 0x00D2; 0x00D3; 0x00D4; 0x00D5; 0x00D6; 0x00D7; 0x00D8; 0x00D9; 0x00DA; 0x00DB; 0x00DC; 0x00DD; 0x00DE; 0x00DF; 0x00E0; 0x00E1; 0x00E2; 0x00E3; 0x00E4; 0x00E5; 0x00E6; 0x00E7; 0x00E8; 0x00E9; 0x00EA; 0x00EB; 0x00EC; 0x00ED; 0x00EE; 0x00EF; 0x00F0; 0x00F1; 0x00F2; 0x00F3; 0x00F4; 0x00F5; 0x00F6; 0x00F7; 0x00F8; 0x00F9; 0x00FA; 0x00FB; 0x00FC; 0x00FD; 0x00FE; 0x00FF |] let iso_8859_15: t = code_page iso_8859_15_table