package csvfields
Runtime support for ppx_xml_conv and ppx_csv_conv_deprecated
Install
Dune Dependency
Authors
Maintainers
Sources
v0.17.0.tar.gz
sha256=c4ab42985bea21fb5880ebc0ef142bf4050a47bd199e0f2bc95ea7f830e9a2cf
doc/src/csvfields.xml-light/xml.ml.html
Source file xml.ml
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(* * Xml Light, an small Xml parser/printer with DTD support. * Copyright (C) 2003 Nicolas Cannasse (ncannasse@motion-twin.com) * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library has the special exception on linking described in file * README. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA *) open Printf type xml = Types.xml = | Element of (string * (string * string) list * xml list) | PCData of string type error_pos = Types.error_pos = { eline : int ; eline_start : int ; emin : int ; emax : int } type error_msg = Types.error_msg = | UnterminatedComment | UnterminatedString | UnterminatedEntity | IdentExpected | CloseExpected | NodeExpected | AttributeNameExpected | AttributeValueExpected | EndOfTagExpected of string | EOFExpected type error = error_msg * error_pos exception Error of error exception File_not_found of string exception Not_element of xml exception Not_pcdata of xml exception No_attribute of string let default_parser = XmlParser.make () let pos source = let line, lstart, min, max = Xml_lexer.pos source in { eline = line; eline_start = lstart; emin = min; emax = max } ;; let parse (p : XmlParser.t) (source : XmlParser.source) = XmlParser.parse p source let parse_string_with p str = parse p (XmlParser.SString str) let parse_in ch = parse default_parser (XmlParser.SChannel ch) let parse_string str = parse_string_with default_parser str let parse_file f = let p = XmlParser.make () in let path = Filename.dirname f in XmlParser.resolve p (fun file -> let name = match path with | "." -> file | _ -> path ^ "/" ^ file in Dtd.check (Dtd.parse_file name)); parse p (XmlParser.SFile f) ;; let error_msg = function | UnterminatedComment -> "Unterminated comment" | UnterminatedString -> "Unterminated string" | UnterminatedEntity -> "Unterminated entity" | IdentExpected -> "Ident expected" | CloseExpected -> "Element close expected" | NodeExpected -> "Xml node expected" | AttributeNameExpected -> "Attribute name expected" | AttributeValueExpected -> "Attribute value expected" | EndOfTagExpected tag -> sprintf "End of tag expected : '%s'" tag | EOFExpected -> "End of file expected" ;; let error (msg, pos) = if pos.emin = pos.emax then sprintf "%s line %d character %d" (error_msg msg) pos.eline (pos.emin - pos.eline_start) else sprintf "%s line %d characters %d-%d" (error_msg msg) pos.eline (pos.emin - pos.eline_start) (pos.emax - pos.eline_start) ;; let line e = e.eline let range e = e.emin - e.eline_start, e.emax - e.eline_start let abs_range e = e.emin, e.emax let tag = function | Element (tag, _, _) -> tag | x -> raise (Not_element x) ;; let pcdata = function | PCData text -> text | x -> raise (Not_pcdata x) ;; let attribs = function | Element (_, attr, _) -> attr | x -> raise (Not_element x) ;; let attrib x att = match x with | Element (_, attr, _) -> (try let att = String.lowercase_ascii att in snd (List.find (fun (n, _) -> String.lowercase_ascii n = att) attr) with | Not_found -> raise (No_attribute att)) | x -> raise (Not_element x) ;; let children = function | Element (_, _, clist) -> clist | x -> raise (Not_element x) ;; (*let enum = function | Element (_,_,clist) -> List.to_enum clist | x -> raise (Not_element x) *) let iter f = function | Element (_, _, clist) -> List.iter f clist | x -> raise (Not_element x) ;; let map f = function | Element (_, _, clist) -> List.map f clist | x -> raise (Not_element x) ;; let fold f v = function | Element (_, _, clist) -> List.fold_left f v clist | x -> raise (Not_element x) ;; module type X = sig type t val add_char : t -> char -> unit val add_string : t -> string -> unit end module Make (Buffer : X) = struct let is_leading_character_of_decimal_or_hexidecimal char = ('0' <= char && char <= '9') || char = 'x' ;; let buffer_pcdata ~tmp text = let l = String.length text in for p = 0 to l - 1 do match text.[p] with | '>' -> Buffer.add_string tmp ">" | '<' -> Buffer.add_string tmp "<" | '&' -> (* The condition is [p < l-3] instead of [p < l-2] to account for a potential semi-colon. *) if p < l - 3 && text.[p + 1] = '#' && is_leading_character_of_decimal_or_hexidecimal text.[p + 2] then (* According to https://en.wikipedia.org/wiki/XML#Escaping and https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_reference_overview, valid escape sequences starting with "&#" are in the form: [&#NUMERIC_VALUE;] , where NUMERIC_VALUE can be hexadecimal or decimal. For example, "中" or "中". *) Buffer.add_char tmp '&' else Buffer.add_string tmp "&" | '\'' -> Buffer.add_string tmp "'" | '"' -> Buffer.add_string tmp """ | c -> Buffer.add_char tmp c done ;; let buffer_attr ~tmp (n, v) = Buffer.add_char tmp ' '; Buffer.add_string tmp n; Buffer.add_string tmp "=\""; let l = String.length v in for p = 0 to l - 1 do match v.[p] with | '"' -> Buffer.add_string tmp """ | c -> Buffer.add_char tmp c done; Buffer.add_char tmp '"' ;; let tag_for_silly_humans tag = let new_string = Bytes.of_string tag in let new_string = Bytes.capitalize_ascii new_string in for i = Bytes.length new_string - 1 downto 0 do match Bytes.get new_string i with | '_' -> Bytes.set new_string i ' ' | _ -> () done; let new_string = Bytes.to_string new_string in new_string ^ ": " ;; let reformat_tag ~format tag = match format with | `Xml -> tag | `No_tag -> tag_for_silly_humans tag ;; let write tmp x = let pcdata = ref false in let rec loop = function | Element (tag, alist, []) -> Buffer.add_char tmp '<'; Buffer.add_string tmp tag; List.iter (buffer_attr ~tmp) alist; Buffer.add_string tmp "/>"; pcdata := false | Element (tag, alist, l) -> Buffer.add_char tmp '<'; Buffer.add_string tmp tag; List.iter (buffer_attr ~tmp) alist; Buffer.add_char tmp '>'; pcdata := false; List.iter loop l; Buffer.add_string tmp "</"; Buffer.add_string tmp tag; Buffer.add_char tmp '>'; pcdata := false | PCData text -> if !pcdata then Buffer.add_char tmp ' '; buffer_pcdata ~tmp text; pcdata := true in loop x ;; let add_char_if_xml ~format tmp char = match format with | `Xml -> Buffer.add_char tmp char | `No_tag -> () ;; let add_string_if_xml ~format tmp string = match format with | `Xml -> Buffer.add_string tmp string | `No_tag -> () ;; let write_fmt tmp ~format x = let rec loop tab = function | Element (tag, alist, []) -> if format = `Xml then ( Buffer.add_string tmp tab; add_char_if_xml ~format tmp '<'; Buffer.add_string tmp (reformat_tag ~format tag); List.iter (buffer_attr ~tmp) alist; add_string_if_xml ~format tmp "/>"; Buffer.add_char tmp '\n') | Element (tag, alist, [ PCData text ]) -> Buffer.add_string tmp tab; add_char_if_xml ~format tmp '<'; Buffer.add_string tmp (reformat_tag ~format tag); List.iter (buffer_attr ~tmp) alist; add_string_if_xml ~format tmp ">"; buffer_pcdata ~tmp text; if format = `Xml then ( Buffer.add_string tmp "</"; Buffer.add_string tmp tag; Buffer.add_char tmp '>'); Buffer.add_char tmp '\n' | Element (tag, alist, l) -> Buffer.add_string tmp tab; add_char_if_xml ~format tmp '<'; Buffer.add_string tmp (reformat_tag ~format tag); List.iter (buffer_attr ~tmp) alist; add_string_if_xml ~format tmp ">"; Buffer.add_char tmp '\n'; List.iter (loop (tab ^ " ")) l; if format = `Xml then ( Buffer.add_string tmp tab; Buffer.add_string tmp "</"; Buffer.add_string tmp tag; Buffer.add_char tmp '>'); Buffer.add_char tmp '\n' | PCData text -> buffer_pcdata ~tmp text; Buffer.add_char tmp '\n' in loop "" x ;; end include Make (Buffer) let to_string xml = let buffer = Buffer.create 200 in write buffer xml; Buffer.contents buffer ;; let to_string_fmt ~format xml = let buffer = Buffer.create 200 in write_fmt buffer ~format xml; Buffer.contents buffer ;; let to_human_string x = let format = `No_tag in to_string_fmt ~format x ;; let to_string_fmt x = let format = `Xml in to_string_fmt ~format x ;; XmlParser._raises (fun x p -> Error (x, pos p)) (fun f -> File_not_found f) (fun x p -> Dtd.Parse_error (x, pos p)); Dtd._raises (fun f -> File_not_found f)
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