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(**
* section: Tree
* synopsis: Navigates a tree to print element names
* purpose: Parse a file to a tree, use xmlDocGetRootElement() to
* get the root element, then walk the document and print
* all the element name in document order.
* usage: tree1 filename_or_URL
* test: tree1 test2.xml > tree1.tmp ; diff tree1.tmp tree1.res ; rm tree1.tmp
* author: Dodji Seketeli
* copy: see Copyright for the status of this software.
*)
program tree1;
{$mode objfpc}
uses
ctypes,
xml2,
exutils,
SysUtils;
procedure print_element_names(a_node: xmlNodePtr);
var
cur_node: xmlNodePtr;
begin
cur_node := a_node;
while assigned(cur_node) do
begin
if cur_node^._type = XML_ELEMENT_NODE then
printfn('node type: Element, name: %s', [cur_node^.name]);
print_element_names(cur_node^.children);
cur_node := cur_node^.next;
end;
end;
var
doc: xmlDocPtr;
root_element: xmlNodePtr;
begin
if paramCount <> 1 then
halt(1);
(*
* this initialize the library and check potential ABI mismatches
* between the version it was compiled for and the actual shared
* library used.
*)
LIBXML_TEST_VERSION;
(* parse the file and get the DOM *)
doc := xmlReadFile(pchar(paramStr(1)), nil, 0);
if not assigned(doc) then
begin
printfn('error: could not parse file %s', [paramStr(1)]);
halt(1);
end;
(* Get the root element node *)
root_element := xmlDocGetRootElement(doc);
print_element_names(root_element);
(* free the document *)
xmlFreeDoc(doc);
(*
* Free the global variables that may
* have been allocated by the parser.
*)
xmlCleanupParser();
end.
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