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/* Copyright (c) 2006, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.javacc.parser;
import java.util.List;
/**
* Utilities.
*/
public abstract class JavaCCParserInternals extends JavaCCGlobals {
static protected void initialize() {
Integer i = new Integer(0);
lexstate_S2I.put("DEFAULT", i);
lexstate_I2S.put(i, "DEFAULT");
simple_tokens_table.put("DEFAULT", new java.util.Hashtable());
}
static protected void addcuname(String id) {
cu_name = id;
}
static protected void compare(Token t, String id1, String id2) {
if (!id2.equals(id1)) {
JavaCCErrors.parse_error(t, "Name " + id2 + " must be the same as that used at PARSER_BEGIN (" + id1 + ")");
}
}
static private List add_cu_token_here = cu_to_insertion_point_1;
static private Token first_cu_token;
static private boolean insertionpoint1set = false;
static private boolean insertionpoint2set = false;
static protected void setinsertionpoint(Token t, int no) {
do {
add_cu_token_here.add(first_cu_token);
first_cu_token = first_cu_token.next;
} while (first_cu_token != t);
if (no == 1) {
if (insertionpoint1set) {
JavaCCErrors.parse_error(t, "Multiple declaration of parser class.");
} else {
insertionpoint1set = true;
add_cu_token_here = cu_to_insertion_point_2;
}
} else {
add_cu_token_here = cu_from_insertion_point_2;
insertionpoint2set = true;
}
first_cu_token = t;
}
static protected void insertionpointerrors(Token t) {
while (first_cu_token != t) {
add_cu_token_here.add(first_cu_token);
first_cu_token = first_cu_token.next;
}
if (!insertionpoint1set || !insertionpoint2set) {
JavaCCErrors.parse_error(t, "Parser class has not been defined between PARSER_BEGIN and PARSER_END.");
}
}
static protected void set_initial_cu_token(Token t) {
first_cu_token = t;
}
static protected void addproduction(NormalProduction p) {
bnfproductions.add(p);
}
static protected void production_addexpansion(BNFProduction p, Expansion e) {
e.parent = p;
p.setExpansion(e);
}
static private int nextFreeLexState = 1;
static protected void addregexpr(TokenProduction p) {
Integer ii;
rexprlist.add(p);
if (Options.getUserTokenManager()) {
if (p.lexStates == null || p.lexStates.length != 1 || !p.lexStates[0].equals("DEFAULT")) {
JavaCCErrors.warning(p, "Ignoring lexical state specifications since option " +
"USER_TOKEN_MANAGER has been set to true.");
}
}
if (p.lexStates == null) {
return;
}
for (int i = 0; i < p.lexStates.length; i++) {
for (int j = 0; j < i; j++) {
if (p.lexStates[i].equals(p.lexStates[j])) {
JavaCCErrors.parse_error(p, "Multiple occurrence of \"" + p.lexStates[i] + "\" in lexical state list.");
}
}
if (lexstate_S2I.get(p.lexStates[i]) == null) {
ii = new Integer(nextFreeLexState++);
lexstate_S2I.put(p.lexStates[i], ii);
lexstate_I2S.put(ii, p.lexStates[i]);
simple_tokens_table.put(p.lexStates[i], new java.util.Hashtable());
}
}
}
static protected void add_token_manager_decls(Token t, java.util.List decls) {
if (token_mgr_decls != null) {
JavaCCErrors.parse_error(t, "Multiple occurrence of \"TOKEN_MGR_DECLS\".");
} else {
token_mgr_decls = decls;
if (Options.getUserTokenManager()) {
JavaCCErrors.warning(t, "Ignoring declarations in \"TOKEN_MGR_DECLS\" since option " +
"USER_TOKEN_MANAGER has been set to true.");
}
}
}
static protected void add_inline_regexpr(RegularExpression r) {
if (!(r instanceof REndOfFile)) {
TokenProduction p = new TokenProduction();
p.isExplicit = false;
p.lexStates = new String[] {"DEFAULT"};
p.kind = TokenProduction.TOKEN;
RegExprSpec res = new RegExprSpec();
res.rexp = r;
res.rexp.tpContext = p;
res.act = new Action();
res.nextState = null;
res.nsTok = null;
p.respecs.add(res);
rexprlist.add(p);
}
}
static protected boolean hexchar(char ch) {
if (ch >= '0' && ch <= '9') return true;
if (ch >= 'A' && ch <= 'F') return true;
if (ch >= 'a' && ch <= 'f') return true;
return false;
}
static protected int hexval(char ch) {
if (ch >= '0' && ch <= '9') return ((int)ch) - ((int)'0');
if (ch >= 'A' && ch <= 'F') return ((int)ch) - ((int)'A') + 10;
return ((int)ch) - ((int)'a') + 10;
}
static protected String remove_escapes_and_quotes(Token t, String str) {
String retval = "";
int index = 1;
char ch, ch1;
int ordinal;
while (index < str.length()-1) {
if (str.charAt(index) != '\\') {
retval += str.charAt(index); index++;
continue;
}
index++;
ch = str.charAt(index);
if (ch == 'b') {
retval += '\b'; index++;
continue;
}
if (ch == 't') {
retval += '\t'; index++;
continue;
}
if (ch == 'n') {
retval += '\n'; index++;
continue;
}
if (ch == 'f') {
retval += '\f'; index++;
continue;
}
if (ch == 'r') {
retval += '\r'; index++;
continue;
}
if (ch == '"') {
retval += '\"'; index++;
continue;
}
if (ch == '\'') {
retval += '\''; index++;
continue;
}
if (ch == '\\') {
retval += '\\'; index++;
continue;
}
if (ch >= '0' && ch <= '7') {
ordinal = ((int)ch) - ((int)'0'); index++;
ch1 = str.charAt(index);
if (ch1 >= '0' && ch1 <= '7') {
ordinal = ordinal*8 + ((int)ch1) - ((int)'0'); index++;
ch1 = str.charAt(index);
if (ch <= '3' && ch1 >= '0' && ch1 <= '7') {
ordinal = ordinal*8 + ((int)ch1) - ((int)'0'); index++;
}
}
retval += (char)ordinal;
continue;
}
if (ch == 'u') {
index++; ch = str.charAt(index);
if (hexchar(ch)) {
ordinal = hexval(ch);
index++; ch = str.charAt(index);
if (hexchar(ch)) {
ordinal = ordinal*16 + hexval(ch);
index++; ch = str.charAt(index);
if (hexchar(ch)) {
ordinal = ordinal*16 + hexval(ch);
index++; ch = str.charAt(index);
if (hexchar(ch)) {
ordinal = ordinal*16 + hexval(ch);
index++;
continue;
}
}
}
}
JavaCCErrors.parse_error(t, "Encountered non-hex character '" + ch +
"' at position " + index + " of string " +
"- Unicode escape must have 4 hex digits after it.");
return retval;
}
JavaCCErrors.parse_error(t, "Illegal escape sequence '\\" + ch +
"' at position " + index + " of string.");
return retval;
}
return retval;
}
static protected char character_descriptor_assign(Token t, String s) {
if (s.length() != 1) {
JavaCCErrors.parse_error(t, "String in character list may contain only one character.");
return ' ';
} else {
return s.charAt(0);
}
}
static protected char character_descriptor_assign(Token t, String s, String left) {
if (s.length() != 1) {
JavaCCErrors.parse_error(t, "String in character list may contain only one character.");
return ' ';
} else if ((int)(left.charAt(0)) > (int)(s.charAt(0))) {
JavaCCErrors.parse_error(t, "Right end of character range \'" + s +
"\' has a lower ordinal value than the left end of character range \'" + left + "\'.");
return left.charAt(0);
} else {
return s.charAt(0);
}
}
static protected void makeTryBlock(
Token tryLoc,
Container result,
Container nestedExp,
List types,
List ids,
List catchblks,
List finallyblk
)
{
if (catchblks.size() == 0 && finallyblk == null) {
JavaCCErrors.parse_error(tryLoc, "Try block must contain at least one catch or finally block.");
return;
}
TryBlock tblk = new TryBlock();
tblk.setLine(tryLoc.beginLine);
tblk.setColumn(tryLoc.beginColumn);
tblk.exp = (Expansion)(nestedExp.member);
tblk.exp.parent = tblk;
tblk.exp.ordinal = 0;
tblk.types = types;
tblk.ids = ids;
tblk.catchblks = catchblks;
tblk.finallyblk = finallyblk;
result.member = tblk;
}
public static void reInit()
{
add_cu_token_here = cu_to_insertion_point_1;
first_cu_token = null;
insertionpoint1set = false;
insertionpoint2set = false;
nextFreeLexState = 1;
}
}
