package csvfields
Runtime support for ppx_xml_conv and ppx_csv_conv
Install
Dune Dependency
Authors
Maintainers
Sources
csvfields-v0.14.0.tar.gz
sha256=cf86add2987a1ad2891fa72f941165411f62dc0a433ce57fbc4f1e914f3750b9
md5=414b2dfea05667d13f31a2e8eb6823e6
doc/src/csvfields.xml-light/dtd.ml.html
Source file dtd.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 open Types type parse_error_msg = | InvalidDTDDecl | InvalidDTDElement | InvalidDTDAttribute | InvalidDTDTag | DTDItemExpected type check_error = | ElementDefinedTwice of string | AttributeDefinedTwice of string * string | ElementEmptyContructor of string | ElementReferenced of string * string | ElementNotDeclared of string | WrongImplicitValueForID of string * string type prove_error = | UnexpectedPCData | UnexpectedTag of string | UnexpectedAttribute of string | InvalidAttributeValue of string | RequiredAttribute of string | ChildExpected of string | EmptyExpected | DuplicateID of string | MissingID of string type dtd_child = Types.dtd_child = | DTDTag of string | DTDPCData | DTDOptional of dtd_child | DTDZeroOrMore of dtd_child | DTDOneOrMore of dtd_child | DTDChoice of dtd_child list | DTDChildren of dtd_child list type dtd_element_type = Types.dtd_element_type = | DTDEmpty | DTDAny | DTDChild of dtd_child type dtd_attr_default = Types.dtd_attr_default = | DTDDefault of string | DTDRequired | DTDImplied | DTDFixed of string type dtd_attr_type = Types.dtd_attr_type = | DTDCData | DTDNMToken | DTDEnum of string list | DTDID | DTDIDRef type dtd_item = Types.dtd_item = | DTDAttribute of string * string * dtd_attr_type * dtd_attr_default | DTDElement of string * dtd_element_type type dtd_result = | DTDNext | DTDNotMatched | DTDMatched | DTDMatchedResult of dtd_child type parse_error = parse_error_msg * error_pos exception Parse_error of parse_error exception Check_error of check_error exception Prove_error of prove_error type dtd = dtd_item list type ('a,'b) hash = ('a,'b) Hashtbl.t type checked = { c_elements : (string,dtd_element_type) hash; c_attribs : (string,(string,(dtd_attr_type * dtd_attr_default)) hash) hash; } type dtd_state = { elements : (string,dtd_element_type) hash; attribs : (string,(string,(dtd_attr_type * dtd_attr_default)) hash) hash; mutable current : dtd_element_type; mutable curtag : string; state : (string * dtd_element_type) Stack.t; } let file_not_found = ref (fun _ -> assert false) let _raises e = file_not_found := e let empty_hash = Hashtbl.create 0 let pos source = let line, lstart, min, max = Xml_lexer.pos source in { eline = line; eline_start = lstart; emin = min; emax = max; } let convert = function | Xml_lexer.EInvalidDTDDecl -> InvalidDTDDecl | Xml_lexer.EInvalidDTDElement -> InvalidDTDElement | Xml_lexer.EInvalidDTDTag -> InvalidDTDTag | Xml_lexer.EDTDItemExpected -> DTDItemExpected | Xml_lexer.EInvalidDTDAttribute -> InvalidDTDAttribute let parse source = try Xml_lexer.init source; (* local cast Dtd.dtd -> dtd *) let dtd = Xml_lexer.dtd source in Xml_lexer.close source; dtd with | Xml_lexer.DTDError e -> Xml_lexer.close source; raise (Parse_error (convert e,pos source)) let parse_string s = parse (Lexing.from_string s) let parse_in ch = parse (Lexing.from_channel ch) let parse_file fname = let ch = (try open_in fname with Sys_error _ -> raise (!file_not_found fname)) in try let x = parse (Lexing.from_channel ch) in close_in ch; x with e -> close_in ch; raise e let check dtd = let attribs = Hashtbl.create 0 in let hdone = Hashtbl.create 0 in let htodo = Hashtbl.create 0 in let ftodo tag from = try ignore(Hashtbl.find hdone tag); with Not_found -> try match Hashtbl.find htodo tag with | None -> Hashtbl.replace htodo tag from | Some _ -> () with Not_found -> Hashtbl.add htodo tag from in let fdone tag edata = try ignore(Hashtbl.find hdone tag); raise (Check_error (ElementDefinedTwice tag)); with Not_found -> Hashtbl.remove htodo tag; Hashtbl.add hdone tag edata in let fattrib tag aname adata = (match adata with | DTDID,DTDImplied -> () | DTDID,DTDRequired -> () | DTDID,_ -> raise (Check_error (WrongImplicitValueForID (tag,aname))) | _ -> ()); let h = (try Hashtbl.find attribs tag with Not_found -> let h = Hashtbl.create 1 in Hashtbl.add attribs tag h; h) in try ignore(Hashtbl.find h aname); raise (Check_error (AttributeDefinedTwice (tag,aname))); with Not_found -> Hashtbl.add h aname adata in let check_item = function | DTDAttribute (tag,aname,atype,adef) -> let utag = String.uppercase tag in ftodo utag None; fattrib utag (String.uppercase aname) (atype,adef) | DTDElement (tag,etype) -> let utag = String.uppercase tag in fdone utag etype; let check_type = function | DTDEmpty -> () | DTDAny -> () | DTDChild x -> let rec check_child = function | DTDTag s -> ftodo (String.uppercase s) (Some utag) | DTDPCData -> () | DTDOptional c | DTDZeroOrMore c | DTDOneOrMore c -> check_child c | DTDChoice [] | DTDChildren [] -> raise (Check_error (ElementEmptyContructor tag)) | DTDChoice l | DTDChildren l -> List.iter check_child l in check_child x in check_type etype in List.iter check_item dtd; Hashtbl.iter (fun t from -> match from with | None -> raise (Check_error (ElementNotDeclared t)) | Some tag -> raise (Check_error (ElementReferenced (t,tag))) ) htodo; { c_elements = hdone; c_attribs = attribs; } let start_prove dtd root = let d = { elements = dtd.c_elements; attribs = dtd.c_attribs; state = Stack.create(); current = DTDChild (DTDTag root); curtag = "_root"; } in try ignore(Hashtbl.find d.elements (String.uppercase root)); d with Not_found -> raise (Check_error (ElementNotDeclared root)) (* - for debug only - *) let to_string_ref = ref (fun _ -> assert false) (*let trace dtd tag = let item = DTDElement ("current",dtd.current) in printf "%s : %s\n" (match tag with None -> "#PCDATA" | Some t -> t) (!to_string_ref item)*) exception TmpResult of dtd_result let prove_child dtd tag = match dtd.current with | DTDEmpty -> raise (Prove_error EmptyExpected) | DTDAny -> () | DTDChild elt -> let rec update = function | DTDTag s -> (match tag with | None -> DTDNotMatched | Some t when t = String.uppercase s -> DTDMatched | Some _ -> DTDNotMatched) | DTDPCData -> (match tag with | None -> DTDMatched | Some _ -> DTDNotMatched) | DTDOptional x -> (match update x with | DTDNotMatched | DTDNext -> DTDNext | DTDMatched | DTDMatchedResult _ -> DTDMatched) | DTDZeroOrMore x -> (match update x with | DTDNotMatched | DTDNext -> DTDNext | DTDMatched | DTDMatchedResult _ -> DTDMatchedResult (DTDZeroOrMore x)) | DTDOneOrMore x -> (match update x with | DTDNotMatched | DTDNext -> DTDNotMatched | DTDMatched | DTDMatchedResult _ -> DTDMatchedResult (DTDZeroOrMore x)) | DTDChoice l -> (try (match List.exists (fun x -> match update x with | DTDMatched -> true | DTDMatchedResult _ as r -> raise (TmpResult r) | DTDNext | DTDNotMatched -> false) l with | true -> DTDMatched | false -> DTDNotMatched) with TmpResult r -> r) | DTDChildren [] -> assert false (* DTD is checked ! *) | DTDChildren (h :: t) -> (match update h with | DTDNext -> (match t with | [] -> DTDNotMatched | _ -> update (DTDChildren t)) | DTDNotMatched -> DTDNotMatched | DTDMatchedResult r -> DTDMatchedResult (DTDChildren (r::t)) | DTDMatched -> match t with | [] -> DTDMatched | _ -> DTDMatchedResult (DTDChildren t)) in match update elt with | DTDNext | DTDNotMatched -> (match tag with | None -> raise (Prove_error UnexpectedPCData) | Some t -> raise (Prove_error (UnexpectedTag t))) | DTDMatched -> dtd.current <- DTDEmpty | DTDMatchedResult r -> dtd.current <- DTDChild r let is_nmtoken_char = function | 'A'..'Z' | 'a'..'z' | '0'..'9' | '.' | '-' | '_' | ':' -> true | _ -> false let prove_attrib _dtd hid hidref attr aname (atype,adef) accu = let aval = (try Some (List.assoc aname attr) with Not_found -> None) in (match atype, aval with | DTDCData, _ -> () | DTDNMToken, None -> () | DTDNMToken, Some v -> for i = 0 to String.length v - 1 do if not (is_nmtoken_char v.[i]) then raise (Prove_error (InvalidAttributeValue aname)); done | DTDEnum _l, None -> () | DTDEnum l, Some v -> if not (List.exists ((=) v) l) then raise (Prove_error (InvalidAttributeValue aname)) | DTDID, None -> () | DTDID, Some id -> if Hashtbl.mem hid id then raise (Prove_error (DuplicateID id)); Hashtbl.add hid id () | DTDIDRef, None -> () | DTDIDRef, Some idref -> Hashtbl.add hidref idref ()); match adef, aval with | DTDRequired, None -> raise (Prove_error (RequiredAttribute aname)) | DTDFixed v, Some av when v <> av -> raise (Prove_error (InvalidAttributeValue aname)) | DTDImplied, None -> accu | DTDFixed v , None | DTDDefault _, Some v | DTDDefault v, None | DTDRequired, Some v | DTDImplied, Some v | DTDFixed _, Some v -> (aname,v) :: accu let check_attrib ahash (aname,_) = try ignore(Hashtbl.find ahash aname); with Not_found -> raise (Prove_error (UnexpectedAttribute aname)) let rec do_prove hid hidref dtd = function | PCData s -> prove_child dtd None; PCData s | Element (tag,attr,childs) -> let utag = String.uppercase tag in let uattr = List.map (fun (aname,aval) -> String.uppercase aname , aval) attr in prove_child dtd (Some utag); Stack.push (dtd.curtag,dtd.current) dtd.state; let elt = (try Hashtbl.find dtd.elements utag with Not_found -> raise (Prove_error (UnexpectedTag tag))) in let ahash = (try Hashtbl.find dtd.attribs utag with Not_found -> empty_hash) in dtd.curtag <- tag; dtd.current <- elt; List.iter (check_attrib ahash) uattr; let attr = Hashtbl.fold (prove_attrib dtd hid hidref uattr) ahash [] in let childs = ref (List.map (do_prove hid hidref dtd) childs) in (match dtd.current with | DTDAny | DTDEmpty -> () | DTDChild elt -> let name = ref "" in let rec check = function | DTDTag t -> name := t; false | DTDPCData when !childs = [] -> childs := [PCData ""]; true | DTDPCData -> name := "#PCDATA"; false | DTDOptional _ -> true | DTDZeroOrMore _ -> true | DTDOneOrMore e -> ignore(check e); false | DTDChoice l -> List.exists check l | DTDChildren l -> List.for_all check l in match check elt with | true -> () | false -> raise (Prove_error (ChildExpected !name))); let _ctag, cur = Stack.pop dtd.state in dtd.curtag <- tag; dtd.current <- cur; Element (tag,attr,!childs) let prove dtd root xml = let hid = Hashtbl.create 0 in let hidref = Hashtbl.create 0 in let x = do_prove hid hidref (start_prove dtd root) xml in Hashtbl.iter (fun id () -> if not (Hashtbl.mem hid id) then raise (Prove_error (MissingID id)) ) hidref; x let parse_error_msg = function | InvalidDTDDecl -> "Invalid DOCTYPE declaration" | InvalidDTDElement -> "Invalid DTD element declaration" | InvalidDTDAttribute -> "Invalid DTD attribute declaration" | InvalidDTDTag -> "Invalid DTD tag" | DTDItemExpected -> "DTD item expected" let parse_error (msg,pos) = if pos.emin = pos.emax then sprintf "%s line %d character %d" (parse_error_msg msg) pos.eline (pos.emin - pos.eline_start) else sprintf "%s line %d characters %d-%d" (parse_error_msg msg) pos.eline (pos.emin - pos.eline_start) (pos.emax - pos.eline_start) let check_error = function | ElementDefinedTwice tag -> sprintf "Element '%s' defined twice" tag | AttributeDefinedTwice (tag,aname) -> sprintf "Attribute '%s' of element '%s' defined twice" aname tag | ElementEmptyContructor tag -> sprintf "Element '%s' has empty constructor" tag | ElementReferenced (tag,from) -> sprintf "Element '%s' referenced by '%s' is not declared" tag from | ElementNotDeclared tag -> sprintf "Element '%s' needed but is not declared" tag | WrongImplicitValueForID (tag,idname) -> sprintf "Attribute '%s' of type ID of element '%s' not defined with implicit value #REQUIRED or #IMPLIED" idname tag let prove_error = function | UnexpectedPCData -> "Unexpected PCData" | UnexpectedTag tag -> sprintf "Unexpected tag : '%s'" tag | UnexpectedAttribute att -> sprintf "Unexpected attribute : '%s'" att | InvalidAttributeValue att -> sprintf "Invalid attribute value for '%s'" att | RequiredAttribute att -> sprintf "Required attribute not found : '%s'" att | ChildExpected cname -> sprintf "Child expected : '%s'" cname | EmptyExpected -> "No more children expected" | DuplicateID id -> sprintf "ID '%s' used several times" id | MissingID idref -> sprintf "missing ID value for IDREF '%s'" idref let to_string = function | DTDAttribute (tag,aname,atype,adef) -> let atype_to_string = function | DTDCData -> "CDATA" | DTDNMToken -> "NMTOKEN" | DTDEnum l -> sprintf "(%s)" (String.concat "|" l) | DTDID -> "ID" | DTDIDRef -> "IDREF" in let adefault_to_string = function | DTDDefault s -> sprintf "\"%s\"" s | DTDRequired -> "#REQUIRED" | DTDImplied -> "#IMPLIED" | DTDFixed s -> sprintf "#FIXED \"%s\"" s in sprintf "<!ATTLIST %s %s %s %s>" tag aname (atype_to_string atype) (adefault_to_string adef) | DTDElement (tag,etype) -> let rec echild_to_string = function | DTDTag s -> s | DTDPCData -> "#PCDATA" | DTDOptional c -> sprintf "%s?" (echild_to_string c) | DTDZeroOrMore c -> sprintf "%s*" (echild_to_string c) | DTDOneOrMore c -> sprintf "%s+" (echild_to_string c) | DTDChoice [c] -> echild_to_string c | DTDChoice l -> sprintf "(%s)" (String.concat "|" (List.map echild_to_string l)) | DTDChildren [c] -> echild_to_string c | DTDChildren l -> sprintf "(%s)" (String.concat "," (List.map echild_to_string l)) in let etype_to_string = function | DTDEmpty -> "EMPTY" | DTDAny -> "ANY" | DTDChild x -> let rec op_to_string = function | DTDOptional c -> sprintf "%s?" (op_to_string c) | DTDZeroOrMore c -> sprintf "%s*" (op_to_string c) | DTDOneOrMore c -> sprintf "%s+" (op_to_string c) | _ -> "" in let rec root = function | DTDOptional c | DTDZeroOrMore c | DTDOneOrMore c -> root c | DTDChoice [_] | DTDChildren [_] as x -> x, false | DTDChoice _ | DTDChildren _ as x -> x, true | x -> x, false in match root x with | r, true -> sprintf "%s%s" (echild_to_string r) (op_to_string x) | r, false -> sprintf "(%s%s)" (echild_to_string r) (op_to_string x) in sprintf "<!ELEMENT %s %s>" tag (etype_to_string etype) ;; to_string_ref := to_string
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