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net.ripe.db.whois.common.generated.AggrBndryParser Maven / Gradle / Ivy
//### This file created by BYACC 1.8(/Java extension 1.15)
//### Java capabilities added 7 Jan 97, Bob Jamison
//### Updated : 27 Nov 97 -- Bob Jamison, Joe Nieten
//### 01 Jan 98 -- Bob Jamison -- fixed generic semantic constructor
//### 01 Jun 99 -- Bob Jamison -- added Runnable support
//### 06 Aug 00 -- Bob Jamison -- made state variables class-global
//### 03 Jan 01 -- Bob Jamison -- improved flags, tracing
//### 16 May 01 -- Bob Jamison -- added custom stack sizing
//### 04 Mar 02 -- Yuval Oren -- improved java performance, added options
//### 14 Mar 02 -- Tomas Hurka -- -d support, static initializer workaround
//### Please send bug reports to [email protected]
//### static char yysccsid[] = "@(#)yaccpar 1.8 (Berkeley) 01/20/90";
package net.ripe.db.whois.common.generated;
//#line 2 "src/main/parser/byacc/aggr_bndry.y"
import net.ripe.db.whois.common.rpsl.AttributeParser;
import net.ripe.db.whois.common.rpsl.ParserHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.StringReader;
/*
filename: aggr_bndry.y
description:
Defines the grammar for an RPSL aggr-bndry attribute. It was mostly
stolen from the IRRToolSet, simplified by removing ability to parse
things defined by a dictionary (we use XML for extensibility rather
than a dictionary).
notes:
Defines tokens for the associated lexer, aggr_bndry.l.
*/
//#line 37 "AggrBndryParser.java"
public class AggrBndryParser
implements AttributeParser
{
boolean yydebug; //do I want debug output?
int yynerrs; //number of errors so far
int yyerrflag; //was there an error?
int yychar; //the current working character
//########## MESSAGES ##########
//###############################################################
// method: debug
//###############################################################
void debug(String msg)
{
if (yydebug)
System.out.println(msg);
}
//########## STATE STACK ##########
final static int YYSTACKSIZE = 500; //maximum stack size
int statestk[] = new int[YYSTACKSIZE]; //state stack
int stateptr;
int stateptrmax; //highest index of stackptr
int statemax; //state when highest index reached
//###############################################################
// methods: state stack push,pop,drop,peek
//###############################################################
final void state_push(int state)
{
try {
stateptr++;
statestk[stateptr]=state;
}
catch (ArrayIndexOutOfBoundsException e) {
int oldsize = statestk.length;
int newsize = oldsize * 2;
int[] newstack = new int[newsize];
System.arraycopy(statestk,0,newstack,0,oldsize);
statestk = newstack;
statestk[stateptr]=state;
}
}
final int state_pop()
{
return statestk[stateptr--];
}
final void state_drop(int cnt)
{
stateptr -= cnt;
}
final int state_peek(int relative)
{
return statestk[stateptr-relative];
}
//###############################################################
// method: init_stacks : allocate and prepare stacks
//###############################################################
final boolean init_stacks()
{
stateptr = -1;
val_init();
return true;
}
//###############################################################
// method: dump_stacks : show n levels of the stacks
//###############################################################
void dump_stacks(int count)
{
int i;
System.out.println("=index==state====value= s:"+stateptr+" v:"+valptr);
for (i=0;i=YYSTACKSIZE)
return;
valstk[++valptr]=val;
}
AggrBndryParserVal val_pop()
{
if (valptr<0)
return new AggrBndryParserVal();
return valstk[valptr--];
}
void val_drop(int cnt)
{
int ptr;
ptr=valptr-cnt;
if (ptr<0)
return;
valptr = ptr;
}
AggrBndryParserVal val_peek(int relative)
{
int ptr;
ptr=valptr-relative;
if (ptr<0)
return new AggrBndryParserVal();
return valstk[ptr];
}
final AggrBndryParserVal dup_yyval(AggrBndryParserVal val)
{
AggrBndryParserVal dup = new AggrBndryParserVal();
dup.ival = val.ival;
dup.dval = val.dval;
dup.sval = val.sval;
dup.obj = val.obj;
return dup;
}
//#### end semantic value section ####
public final static short OP_OR=257;
public final static short OP_AND=258;
public final static short KEYW_EXCEPT=259;
public final static short TKN_ASNO=260;
public final static short TKN_ASNAME=261;
public final static short YYERRCODE=256;
final static short yylhs[] = { -1,
0, 1, 1, 2, 2, 2, 3, 3, 4, 4,
};
final static short yylen[] = { 2,
1, 3, 1, 3, 3, 1, 3, 1, 1, 1,
};
final static short yydefred[] = { 0,
9, 10, 0, 0, 0, 0, 6, 8, 0, 0,
0, 0, 7, 0, 4, 5,
};
final static short yydgoto[] = { 4,
5, 6, 7, 8,
};
final static short yysindex[] = { -40,
0, 0, -40, 0, -249, -254, 0, 0, -38, -40,
-40, -40, 0, -254, 0, 0,
};
final static short yyrindex[] = { 0,
0, 0, 0, 0, 9, 1, 0, 0, 0, 0,
0, 0, 0, 2, 0, 0,
};
final static short yygindex[] = { 0,
7, 3, -5, 0,
};
final static int YYTABLESIZE=259;
static short yytable[];
static { yytable();}
static void yytable(){
yytable = new short[]{ 3,
3, 2, 13, 11, 12, 15, 16, 10, 1, 9,
0, 0, 14, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 3, 2, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 10, 1,
2, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 3, 2,
};
}
static short yycheck[];
static { yycheck(); }
static void yycheck() {
yycheck = new short[] { 40,
0, 0, 41, 258, 259, 11, 12, 257, 0, 3,
-1, -1, 10, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, 41, 41, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, 257, 260,
261, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, 257, 257,
};
}
final static short YYFINAL=4;
final static short YYMAXTOKEN=261;
final static String yyname[] = {
"end-of-file",null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,"'('","')'",null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,
null,null,null,null,"OP_OR","OP_AND","KEYW_EXCEPT","TKN_ASNO","TKN_ASNAME",
};
final static String yyrule[] = {
"$accept : aggr_bndry",
"aggr_bndry : as_expr",
"as_expr : as_expr OP_OR as_expr_term",
"as_expr : as_expr_term",
"as_expr_term : as_expr_term OP_AND as_expr_factor",
"as_expr_term : as_expr_term KEYW_EXCEPT as_expr_factor",
"as_expr_term : as_expr_factor",
"as_expr_factor : '(' as_expr ')'",
"as_expr_factor : as_expr_operand",
"as_expr_operand : TKN_ASNO",
"as_expr_operand : TKN_ASNAME",
};
//#line 51 "src/main/parser/byacc/aggr_bndry.y"
protected final Logger LOGGER = LoggerFactory.getLogger(AggrBndryParser.class);
private AggrBndryLexer lexer;
private int yylex () {
int yyl_return = -1;
try {
yyl_return = lexer.yylex();
}
catch (IOException e) {
LOGGER.error(e.getMessage(), e);
}
return yyl_return;
}
public void yyerror (final String error) {
String errorMessage = (yylval.sval == null ? error : yylval.sval);
ParserHelper.parserError(errorMessage);
}
@Override
public Void parse(final String attributeValue) {
lexer = new AggrBndryLexer(new StringReader(attributeValue), this);
final int result = yyparse();
if (result > 0) {
throw new IllegalArgumentException("Unexpected parse result: " + result);
}
return null;
}
//#line 271 "AggrBndryParser.java"
//###############################################################
// method: yylexdebug : check lexer state
//###############################################################
void yylexdebug(int state,int ch)
{
String s=null;
if (ch < 0) ch=0;
if (ch <= YYMAXTOKEN) //check index bounds
s = yyname[ch]; //now get it
if (s==null)
s = "illegal-symbol";
debug("state "+state+", reading "+ch+" ("+s+")");
}
//The following are now global, to aid in error reporting
int yyn; //next next thing to do
int yym; //
int yystate; //current parsing state from state table
String yys; //current token string
//###############################################################
// method: yyparse : parse input and execute indicated items
//###############################################################
int yyparse()
{
boolean doaction;
init_stacks();
yynerrs = 0;
yyerrflag = 0;
yychar = -1; //impossible char forces a read
yystate=0; //initial state
state_push(yystate); //save it
val_push(yylval); //save empty value
while (true) //until parsing is done, either correctly, or w/error
{
doaction=true;
//if (yydebug) debug("loop");
//#### NEXT ACTION (from reduction table)
for (yyn=yydefred[yystate];yyn==0;yyn=yydefred[yystate])
{
//if (yydebug) debug("yyn:"+yyn+" state:"+yystate+" yychar:"+yychar);
if (yychar < 0) //we want a char?
{
yychar = yylex(); //get next token
//if (yydebug) debug(" next yychar:"+yychar);
//#### ERROR CHECK ####
if (yychar < 0) //it it didn't work/error
{
yychar = 0; //change it to default string (no -1!)
//if (yydebug)
// yylexdebug(yystate,yychar);
}
}//yychar<0
yyn = yysindex[yystate]; //get amount to shift by (shift index)
if ((yyn != 0) && (yyn += yychar) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
{
//if (yydebug)
//debug("state "+yystate+", shifting to state "+yytable[yyn]);
//#### NEXT STATE ####
yystate = yytable[yyn];//we are in a new state
state_push(yystate); //save it
val_push(yylval); //push our lval as the input for next rule
yychar = -1; //since we have 'eaten' a token, say we need another
if (yyerrflag > 0) //have we recovered an error?
--yyerrflag; //give ourselves credit
doaction=false; //but don't process yet
break; //quit the yyn=0 loop
}
yyn = yyrindex[yystate]; //reduce
if ((yyn !=0 ) && (yyn += yychar) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
{ //we reduced!
//if (yydebug) debug("reduce");
yyn = yytable[yyn];
doaction=true; //get ready to execute
break; //drop down to actions
}
else //ERROR RECOVERY
{
if (yyerrflag==0)
{
yyerror("syntax error");
yynerrs++;
}
if (yyerrflag < 3) //low error count?
{
yyerrflag = 3;
while (true) //do until break
{
if (stateptr<0) //check for under & overflow here
{
yyerror("stack underflow. aborting..."); //note lower case 's'
return 1;
}
yyn = yysindex[state_peek(0)];
if ((yyn != 0) && (yyn += YYERRCODE) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE)
{
//if (yydebug)
//debug("state "+state_peek(0)+", error recovery shifting to state "+yytable[yyn]+" ");
yystate = yytable[yyn];
state_push(yystate);
val_push(yylval);
doaction=false;
break;
}
else
{
//if (yydebug)
//debug("error recovery discarding state "+state_peek(0)+" ");
if (stateptr<0) //check for under & overflow here
{
yyerror("Stack underflow. aborting..."); //capital 'S'
return 1;
}
state_pop();
val_pop();
}
}
}
else //discard this token
{
if (yychar == 0)
return 1; //yyabort
//if (yydebug)
//{
//yys = null;
//if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
//if (yys == null) yys = "illegal-symbol";
//debug("state "+yystate+", error recovery discards token "+yychar+" ("+yys+")");
//}
yychar = -1; //read another
}
}//end error recovery
}//yyn=0 loop
if (!doaction) //any reason not to proceed?
continue; //skip action
yym = yylen[yyn]; //get count of terminals on rhs
//if (yydebug)
//debug("state "+yystate+", reducing "+yym+" by rule "+yyn+" ("+yyrule[yyn]+")");
if (yym>0) //if count of rhs not 'nil'
yyval = val_peek(yym-1); //get current semantic value
yyval = dup_yyval(yyval); //duplicate yyval if ParserVal is used as semantic value
switch(yyn)
{
//########## USER-SUPPLIED ACTIONS ##########
//########## END OF USER-SUPPLIED ACTIONS ##########
}//switch
//#### Now let's reduce... ####
//if (yydebug) debug("reduce");
state_drop(yym); //we just reduced yylen states
yystate = state_peek(0); //get new state
val_drop(yym); //corresponding value drop
yym = yylhs[yyn]; //select next TERMINAL(on lhs)
if (yystate == 0 && yym == 0)//done? 'rest' state and at first TERMINAL
{
//if (yydebug) debug("After reduction, shifting from state 0 to state "+YYFINAL+"");
yystate = YYFINAL; //explicitly say we're done
state_push(YYFINAL); //and save it
val_push(yyval); //also save the semantic value of parsing
if (yychar < 0) //we want another character?
{
yychar = yylex(); //get next character
if (yychar<0) yychar=0; //clean, if necessary
//if (yydebug)
//yylexdebug(yystate,yychar);
}
if (yychar == 0) //Good exit (if lex returns 0 ;-)
break; //quit the loop--all DONE
}//if yystate
else //else not done yet
{ //get next state and push, for next yydefred[]
yyn = yygindex[yym]; //find out where to go
if ((yyn != 0) && (yyn += yystate) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yystate)
yystate = yytable[yyn]; //get new state
else
yystate = yydgoto[yym]; //else go to new defred
//if (yydebug) debug("after reduction, shifting from state "+state_peek(0)+" to state "+yystate+"");
state_push(yystate); //going again, so push state & val...
val_push(yyval); //for next action
}
}//main loop
return 0;//yyaccept!!
}
//## end of method parse() ######################################
//## run() --- for Thread #######################################
//## The -Jnorun option was used ##
//## end of method run() ########################################
//## Constructors ###############################################
//## The -Jnoconstruct option was used ##
//###############################################################
}
//################### END OF CLASS ##############################
