basic_xml_parser.anubis
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/*
* Created by PyramIDE.
* User: Totoro
* Date: 07/12/2011
* Time: 14:23
*
* To change this template use Tools | Options | Coding | Edit Standard Headers.
*/
read system/data_io.anubis
read tools/streams.anubis
read tools/basis.anubis
read system/string.anubis
read lexical_analysis/fast_lexer.anubis
execute anbexec apg xml_parser.apg
read xml_parser.apg.anubis
public type XML_Value:
xml_value(String name, String value).
type XML_Value:
value(String name, String value).
*******************************************************************************************
define One print_ind (Int n) = print(constant_string(n,' ')).
define One print
(
XML_Element e,
Int ind
).
define One
print
(
XML_Element e,
Int ind
) =
if e is
{
node(name,l) then print("\n");print_ind(ind);print("<"+name+">");
map_forget((XML_Element e1) |-> print(e1,ind+2),l);
print("\n");print_ind(ind);print("</"+name+">"),
leaf(name,val) then print("\n");print_ind(ind);print("<"+name+">"+*val+"</"+name+">"),
no_match(o, c) then println("NO MATCH "+o+" /= "+c)
}.
public define One
print
(
XML_File f
)=
if f is xml_file(header, element) then
println("<?"+header+"?>");
print(element,0).
define Maybe(One)
write_ind
(
Int n,
WStream file
)=
if write(file,to_byte_array(constant_string(n,' '))) is
{
failure then failure,
success(_) then success(unique)
}.
define Maybe(One)
write_xml
(
XML_Element e,
Int ind,
WStream file
) =
if e is
{
node(name,l) then if write(file,to_byte_array("\n")) is
{
failure then failure,
success(_) then
if write_ind(ind,file) is
{
failure then failure,
success(_) then
if write(file,to_byte_array("<"+name+">")) is
{
failure then failure,
success(_) then
map_forget((XML_Element e1) |-> write_xml(e1,ind+2,file),l);
if write(file,to_byte_array("\n")) is
{
failure then failure,
success(_) then
if write_ind(ind,file) is
{
failure then failure,
success(_) then
if write(file,to_byte_array("</"+name+">")) is
{
failure then failure,
success(_) then success(unique)
}}}}}},
leaf(name,val) then if write(file,to_byte_array("\n")) is
{
failure then failure
success(_) then
if write_ind(ind,file) is
{
failure then failure,
success(_) then
if write(file,to_byte_array("<"+name+">"+*val+"</"+name+">")) is
{
failure then failure,
success(_) then success(unique)
}}},
no_match(o, c) then if write(file,to_byte_array("NO MATCH "+o+" /= "+c+"\n")) is
{
failure then failure,
success(_) then success(unique)
}
}.
public define Maybe(One)
write_xml
(
WStream file,
XML_File f
)=
if f is xml_file(header, element) then
if write(file,to_byte_array("<?"+header+"?>")) is
{
failure then failure,
success(_) then
if write_xml(element,0,file) is
{
failure then failure
success(_) then success(unique)
}
}.
public define Maybe(One)
create_file
(
XML_File xml_file,
String target_filename
)=
if (Maybe(RWStream))file(target_filename, new) is
{
failure then failure,
success(f) then
if write_xml(weaken(f),xml_file) is
{
failure then failure,
success(_) then success(unique)
}
}.
define String to_String
(
Token_Value_xml_parser token
)=
if token is
{
eof(_) then "[EOF]",
_close(_) then "[>]",
_open(_) then "[<]",
_open_question(_) then "[?>]",
_open_slash(_)then "[</]",
_question(_) then "[?]",
_question_close(_) then "[<?]",
_slash(_) then "[/]",
_slash_close(_)then "[/>]",
_text(t) then "[text="+t+"]",
}.
define List(LexerItem(Token_Value_xml_parser))
xml_lexer_description =
[
/* recognize < */
lexer_item("</", return((ByteArray b,Int l, Int c) |-> token(_open_slash(unique)))),
lexer_item(">", return((ByteArray b,Int l, Int c) |-> token(_close(unique)))),
lexer_item("<", return((ByteArray b,Int l, Int c) |-> token(_open(unique)))),
lexer_item("/>", return((ByteArray b,Int l, Int c) |-> token(_slash_close(unique)))),
lexer_item("<#?", return((ByteArray b,Int l, Int c) |-> token(_open_question(unique)))),
lexer_item("#?>", return((ByteArray b,Int l, Int c) |-> token(_question_close(unique)))),
lexer_item("#?", return((ByteArray b,Int l, Int c) |-> token(_question(unique)))),
lexer_item("#/", return((ByteArray b,Int l, Int c) |-> token(_slash(unique)))),
lexer_item("[#n#r#t# ]*", ignore),
lexer_item("[^#/#?#<#>]*", return((ByteArray b,Int l, Int c) |-> token(_text(to_string(b))))),
/* ignore everything else */
//lexer_item(".",ignore) /* "." represents any character except '\n' */
].
**********************************************************************************************
**********************************************************************************************
define Maybe(LexingStream)
prepare_input
(
String filename
) =
/* try to open the file (see 'predefined.anubis' section 5.1) */
if file(filename,read) is
{
failure then failure,
success(f) then make_lexing_stream("",
f, /* the opened file */
1000, /* size of buffer for the lexing stream */
100) /* timeout (seconds) */
}.
define One -> Token_Value_xml_parser
make_xml_lexer
(
One -> LexerOutput(Token_Value_xml_parser) lexer
) =
(One u) |->
if lexer(unique) is
{
end_of_input then eof(unique),
error(b,_,_) then
/* should never happen with this lexer (see the above comment) */
print("Lexical Error: ["+to_string(b)+"]\n");eof(unique)
token(t) then //println(to_String(t));
t
}.
define Maybe(XML_Value)
get_value
(
XML_Element e,
List(String) path
).
define Maybe(XML_Value)
get_value
(
List(XML_Element) l,
List(String) path
) =
if l is
{
[ ] then failure,
[h . t] then if get_value(h,path) is
{
failure then get_value(t,path)
success(v) then success(v)
}
}.
define Maybe(XML_Value)
get_value
(
XML_Element e,
List(String) path
) =
if e is
{
node(name,l) then if path is
{
[ ] then failure,
[h . t] then if h = name
then get_value(l,t)
else failure
}
leaf(name,vv) then if path is
{
[ ] then failure,
[h . t] then if t is
{
[ ] then if h = name
then success(xml_value(name,*vv))
else failure,
[_ . _] then failure
}
}
no_match(oname,cname) then failure
}.
public define Maybe(XML_Value)
get_value
(
XML_File e,
String path
) =
if e is xml_file(header, body) then
get_value(body, split_by_token(path,'/')).
define Maybe(XML_Value)
set_value
(
XML_Element e,
List(String) path,
String xml_val
).
define Maybe(XML_Value)
set_value
(
List(XML_Element) l,
List(String) path,
String xml_val
) =
if l is
{
[ ] then failure,
[h . t] then if set_value(h,path,xml_val) is
{
failure then set_value(t,path,xml_val)
success(v) then success(v)
}
}.
define Maybe(XML_Value)
set_value
(
XML_Element e,
List(String) path,
String xml_val
) =
if e is
{
node(name,l) then if path is
{
[ ] then failure,
[h . t] then if h = name
then set_value(l,t,xml_val)
else failure
}
leaf(name,vv) then if path is
{
[ ] then failure,
[h . t] then if t is
{
[ ] then if h = name
then
vv <- xml_val;
success(xml_value(name,*vv))
else failure,
[_ . _] then failure
}
}
no_match(oname,cname) then failure
}.
public define Maybe(XML_Element)
set_value
(
XML_File e,
String path,
String xml_value
) =
if e is xml_file(header, body) then
if set_value(body, split_by_token(path,'/'), xml_value) is
{
failure then failure,
success(v) then if v is xml_value(name,val) then println("name:"+name+" "+"value :"+val); success(body)
}.
public define Maybe(XML_Element)
set_values
(
XML_File e,
List((String,String)) values
) =
if e is xml_file(header, body) then
if values is
{
[] then success(body),
[h . t] then
if h is (name,val) then
if set_value(body, split_by_token(name,'/'), val) is
{
failure then failure,
success(v) then set_values(e,t)
}
}.
public define Maybe(XML_File)
open_xml
(
String filename
)=
if prepare_input(filename) is
{
failure then print("cannot open or read file "); failure,
success(ls) then
if make_lexer(xml_lexer_description, '#') is
{
error(msg) then println(to_English(msg)); failure,
ok(lexer) then
if xml_parser(make_xml_lexer(lexer(ls))) is
{
error(p) then
if p is (token, l) then println("syntax error:"+to_String(token));failure,
ok(xml_f) then
success(xml_f)
}
}
}.
global define One
test_xml
(
List(String) args
)=
if args is
{
[ ] then print("Usage ....\n "),
[h . t] then
with pattern = (List(String))
if t is
{
[ ] then [],
[u . _] then split_by_token(u,'/')
},
if prepare_input(h) is
{
failure then print("cannot open or read file "),
success(ls) then
with start_time = unow,
if make_lexer(xml_lexer_description, '#') is
{
error(msg) then println(to_English(msg)),
ok(lexer) then
if xml_parser(make_xml_lexer(lexer(ls))) is
{
error(p) then
if p is (token, l) then println("syntax error:"+to_String(token)),
ok(xml_f) then
/* print(xml_f)*/ unique;
if pattern /= []
then if get_value(body(xml_f),pattern) is
{
failure then print("\n\n Value not found for "+join("/",pattern)),
success(val) then print("\n\n"+join("/",pattern)+" = "+value(val))
}; print("\n\n")
else unique
};
if unow - start_time is utime(secs,microsecs) then
print("Duration: "+abs_to_decimal(secs)+" seconds, "+
abs_to_decimal(microsecs)+" microseconds.\n")
}
}
}.
public define One
test_values
(
)=
with xml_file=snomone_pbx_directory+"test.xml",
if open_xml(xml_file) is
{
failure then println("can't open"+xml_file);unique
success(file) then
if set_values(file,[("/test/a","lol"),("/test/b","test")]) is
{
failure then println("can't set values");unique,
success(v) then print(file)
}
}.