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/xmlParser.ml.html
Source file xmlParser.ml
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(* * Xml Light, an small Xml parser/printer with DTD support. * Copyright (C) 2003 Nicolas Cannasse (ncannasse@motion-twin.com) * Copyright (C) 2003 Jacques Garrigue * * 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 open Dtd open Types type t = { mutable prove : bool ; mutable check_eof : bool ; mutable concat_pcdata : bool ; mutable resolve : string -> checked } type source = | SFile of string | SChannel of in_channel | SString of string | SLexbuf of Lexing.lexbuf type state = { source : Lexing.lexbuf ; stack : Xml_lexer.token Stack.t ; xparser : t } exception Internal_error of error_msg exception NoMoreData let xml_error = ref (fun _ -> assert false) let dtd_error = ref (fun _ -> assert false) let file_not_found = ref (fun _ -> assert false) let _raises e f d = xml_error := e; file_not_found := f; dtd_error := d ;; let make () = { prove = true ; check_eof = true ; concat_pcdata = true ; resolve = (fun file -> raise (!file_not_found file)) } ;; let prove p v = p.prove <- v let resolve p f = p.resolve <- f let check_eof p v = p.check_eof <- v let concat_pcdata p v = p.concat_pcdata <- v let pop s = try Stack.pop s.stack with | Stack.Empty -> Xml_lexer.token s.source ;; let push t s = Stack.push t s.stack let rec read_node s = match pop s with | Xml_lexer.PCData s -> PCData s | Xml_lexer.Tag (tag, attr, true) -> Element (tag, attr, []) | Xml_lexer.Tag (tag, attr, false) -> Element (tag, attr, read_elems ~tag s) | t -> push t s; raise NoMoreData and read_elems ?tag s = let elems = ref [] in (try while true do match s.xparser.concat_pcdata, read_node s, !elems with | true, PCData c, PCData c2 :: q -> elems := PCData (sprintf "%s\n%s" c2 c) :: q | _, x, l -> elems := x :: l done with | NoMoreData -> ()); match pop s with | Xml_lexer.Endtag s when Some s = tag -> List.rev !elems | Xml_lexer.Eof when tag = None -> List.rev !elems | _t -> (match tag with | None -> raise (Internal_error EOFExpected) | Some s -> raise (Internal_error (EndOfTagExpected s))) ;; let read_xml s = match s.xparser.prove, pop s with | true, Xml_lexer.DocType (root, Xml_lexer.DTDFile file) -> let pos = Xml_lexer.pos s.source in let dtd = s.xparser.resolve file in Xml_lexer.restore pos; let x = read_node s in Dtd.prove dtd root x | true, Xml_lexer.DocType (root, Xml_lexer.DTDData dtd) -> let dtd = Dtd.check dtd in let x = read_node s in Dtd.prove dtd root x | false, Xml_lexer.DocType _ -> read_node s | _, t -> push t s; read_node s ;; let convert = function | Xml_lexer.EUnterminatedComment -> UnterminatedComment | Xml_lexer.EUnterminatedString -> UnterminatedString | Xml_lexer.EIdentExpected -> IdentExpected | Xml_lexer.ECloseExpected -> CloseExpected | Xml_lexer.ENodeExpected -> NodeExpected | Xml_lexer.EAttributeNameExpected -> AttributeNameExpected | Xml_lexer.EAttributeValueExpected -> AttributeValueExpected | Xml_lexer.EUnterminatedEntity -> UnterminatedEntity ;; let dtd_convert = function | Xml_lexer.EInvalidDTDDecl -> InvalidDTDDecl | Xml_lexer.EInvalidDTDTag -> InvalidDTDTag | Xml_lexer.EDTDItemExpected -> DTDItemExpected | Xml_lexer.EInvalidDTDElement -> InvalidDTDElement | Xml_lexer.EInvalidDTDAttribute -> InvalidDTDAttribute ;; let do_parse xparser source = try Xml_lexer.init source; let s = { source; xparser; stack = Stack.create () } in let tk = pop s in (* skip UTF8 BOM *) if tk <> Xml_lexer.PCData "\239\187\191" then push tk s; let x = read_xml s in if xparser.check_eof && pop s <> Xml_lexer.Eof then raise (Internal_error EOFExpected); Xml_lexer.close source; x with | NoMoreData -> Xml_lexer.close source; raise (!xml_error NodeExpected source) | Internal_error e -> Xml_lexer.close source; raise (!xml_error e source) | Xml_lexer.Error e -> Xml_lexer.close source; raise (!xml_error (convert e) source) | Xml_lexer.DTDError e -> Xml_lexer.close source; raise (!dtd_error (dtd_convert e) source) ;; let parse p = function | SChannel ch -> do_parse p (Lexing.from_channel ch) | SString str -> do_parse p (Lexing.from_string str) | SLexbuf lex -> do_parse p lex | SFile fname -> let ch = try open_in fname with | Sys_error _ -> raise (!file_not_found fname) in (try let x = do_parse p (Lexing.from_channel ch) in close_in ch; x with | e -> close_in ch; raise e) ;;
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