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author | Alexander Sulfrian <alexander@sulfrian.net> | 2010-06-08 08:22:05 +0200 |
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committer | Alexander Sulfrian <alexander@sulfrian.net> | 2010-06-08 08:22:05 +0200 |
commit | d7c5ad7d6263fd1baf9bfdbaa4c50b70ef2fbdb2 (patch) | |
tree | ae0b65da6432f4c26c8d5a7319efbda5d172846c /infrastructure/rhino1_7R1/src/org/mozilla/javascript/TokenStream.java | |
parent | fa61221dcd89fcd72cba2c97971626f456c86e5d (diff) | |
download | etherpad-d7c5ad7d6263fd1baf9bfdbaa4c50b70ef2fbdb2.tar.gz etherpad-d7c5ad7d6263fd1baf9bfdbaa4c50b70ef2fbdb2.tar.xz etherpad-d7c5ad7d6263fd1baf9bfdbaa4c50b70ef2fbdb2.zip |
reverted folder structure change for better mergeing with upstream
Diffstat (limited to 'infrastructure/rhino1_7R1/src/org/mozilla/javascript/TokenStream.java')
-rw-r--r-- | infrastructure/rhino1_7R1/src/org/mozilla/javascript/TokenStream.java | 1500 |
1 files changed, 0 insertions, 1500 deletions
diff --git a/infrastructure/rhino1_7R1/src/org/mozilla/javascript/TokenStream.java b/infrastructure/rhino1_7R1/src/org/mozilla/javascript/TokenStream.java deleted file mode 100644 index c8c3045..0000000 --- a/infrastructure/rhino1_7R1/src/org/mozilla/javascript/TokenStream.java +++ /dev/null @@ -1,1500 +0,0 @@ -/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- - * - * ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is Rhino code, released - * May 6, 1999. - * - * The Initial Developer of the Original Code is - * Netscape Communications Corporation. - * Portions created by the Initial Developer are Copyright (C) 1997-1999 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * Roger Lawrence - * Mike McCabe - * Igor Bukanov - * Ethan Hugg - * Bob Jervis - * Terry Lucas - * Milen Nankov - * - * Alternatively, the contents of this file may be used under the terms of - * the GNU General Public License Version 2 or later (the "GPL"), in which - * case the provisions of the GPL are applicable instead of those above. If - * you wish to allow use of your version of this file only under the terms of - * the GPL and not to allow others to use your version of this file under the - * MPL, indicate your decision by deleting the provisions above and replacing - * them with the notice and other provisions required by the GPL. If you do - * not delete the provisions above, a recipient may use your version of this - * file under either the MPL or the GPL. - * - * ***** END LICENSE BLOCK ***** */ - -package org.mozilla.javascript; - -import java.io.*; - -/** - * This class implements the JavaScript scanner. - * - * It is based on the C source files jsscan.c and jsscan.h - * in the jsref package. - * - * @see org.mozilla.javascript.Parser - * - * @author Mike McCabe - * @author Brendan Eich - */ - -class TokenStream -{ - /* - * For chars - because we need something out-of-range - * to check. (And checking EOF by exception is annoying.) - * Note distinction from EOF token type! - */ - private final static int - EOF_CHAR = -1; - - TokenStream(Parser parser, Reader sourceReader, String sourceString, - int lineno) - { - this.parser = parser; - this.lineno = lineno; - if (sourceReader != null) { - if (sourceString != null) Kit.codeBug(); - this.sourceReader = sourceReader; - this.sourceBuffer = new char[512]; - this.sourceEnd = 0; - } else { - if (sourceString == null) Kit.codeBug(); - this.sourceString = sourceString; - this.sourceEnd = sourceString.length(); - } - this.sourceCursor = 0; - } - - /* This function uses the cached op, string and number fields in - * TokenStream; if getToken has been called since the passed token - * was scanned, the op or string printed may be incorrect. - */ - String tokenToString(int token) - { - if (Token.printTrees) { - String name = Token.name(token); - - switch (token) { - case Token.STRING: - case Token.REGEXP: - case Token.NAME: - return name + " `" + this.string + "'"; - - case Token.NUMBER: - return "NUMBER " + this.number; - } - - return name; - } - return ""; - } - - static boolean isKeyword(String s) - { - return Token.EOF != stringToKeyword(s); - } - - private static int stringToKeyword(String name) - { -// #string_id_map# -// The following assumes that Token.EOF == 0 - final int - Id_break = Token.BREAK, - Id_case = Token.CASE, - Id_continue = Token.CONTINUE, - Id_default = Token.DEFAULT, - Id_delete = Token.DELPROP, - Id_do = Token.DO, - Id_else = Token.ELSE, - Id_export = Token.EXPORT, - Id_false = Token.FALSE, - Id_for = Token.FOR, - Id_function = Token.FUNCTION, - Id_if = Token.IF, - Id_in = Token.IN, - Id_let = Token.LET, - Id_new = Token.NEW, - Id_null = Token.NULL, - Id_return = Token.RETURN, - Id_switch = Token.SWITCH, - Id_this = Token.THIS, - Id_true = Token.TRUE, - Id_typeof = Token.TYPEOF, - Id_var = Token.VAR, - Id_void = Token.VOID, - Id_while = Token.WHILE, - Id_with = Token.WITH, - Id_yield = Token.YIELD, - - // the following are #ifdef RESERVE_JAVA_KEYWORDS in jsscan.c - Id_abstract = Token.RESERVED, - Id_boolean = Token.RESERVED, - Id_byte = Token.RESERVED, - Id_catch = Token.CATCH, - Id_char = Token.RESERVED, - Id_class = Token.RESERVED, - Id_const = Token.CONST, - Id_debugger = Token.DEBUGGER, - Id_double = Token.RESERVED, - Id_enum = Token.RESERVED, - Id_extends = Token.RESERVED, - Id_final = Token.RESERVED, - Id_finally = Token.FINALLY, - Id_float = Token.RESERVED, - Id_goto = Token.RESERVED, - Id_implements = Token.RESERVED, - Id_import = Token.IMPORT, - Id_instanceof = Token.INSTANCEOF, - Id_int = Token.RESERVED, - Id_interface = Token.RESERVED, - Id_long = Token.RESERVED, - Id_native = Token.RESERVED, - Id_package = Token.RESERVED, - Id_private = Token.RESERVED, - Id_protected = Token.RESERVED, - Id_public = Token.RESERVED, - Id_short = Token.RESERVED, - Id_static = Token.RESERVED, - Id_super = Token.RESERVED, - Id_synchronized = Token.RESERVED, - Id_throw = Token.THROW, - Id_throws = Token.RESERVED, - Id_transient = Token.RESERVED, - Id_try = Token.TRY, - Id_volatile = Token.RESERVED; - - int id; - String s = name; -// #generated# Last update: 2007-04-18 13:53:30 PDT - L0: { id = 0; String X = null; int c; - L: switch (s.length()) { - case 2: c=s.charAt(1); - if (c=='f') { if (s.charAt(0)=='i') {id=Id_if; break L0;} } - else if (c=='n') { if (s.charAt(0)=='i') {id=Id_in; break L0;} } - else if (c=='o') { if (s.charAt(0)=='d') {id=Id_do; break L0;} } - break L; - case 3: switch (s.charAt(0)) { - case 'f': if (s.charAt(2)=='r' && s.charAt(1)=='o') {id=Id_for; break L0;} break L; - case 'i': if (s.charAt(2)=='t' && s.charAt(1)=='n') {id=Id_int; break L0;} break L; - case 'l': if (s.charAt(2)=='t' && s.charAt(1)=='e') {id=Id_let; break L0;} break L; - case 'n': if (s.charAt(2)=='w' && s.charAt(1)=='e') {id=Id_new; break L0;} break L; - case 't': if (s.charAt(2)=='y' && s.charAt(1)=='r') {id=Id_try; break L0;} break L; - case 'v': if (s.charAt(2)=='r' && s.charAt(1)=='a') {id=Id_var; break L0;} break L; - } break L; - case 4: switch (s.charAt(0)) { - case 'b': X="byte";id=Id_byte; break L; - case 'c': c=s.charAt(3); - if (c=='e') { if (s.charAt(2)=='s' && s.charAt(1)=='a') {id=Id_case; break L0;} } - else if (c=='r') { if (s.charAt(2)=='a' && s.charAt(1)=='h') {id=Id_char; break L0;} } - break L; - case 'e': c=s.charAt(3); - if (c=='e') { if (s.charAt(2)=='s' && s.charAt(1)=='l') {id=Id_else; break L0;} } - else if (c=='m') { if (s.charAt(2)=='u' && s.charAt(1)=='n') {id=Id_enum; break L0;} } - break L; - case 'g': X="goto";id=Id_goto; break L; - case 'l': X="long";id=Id_long; break L; - case 'n': X="null";id=Id_null; break L; - case 't': c=s.charAt(3); - if (c=='e') { if (s.charAt(2)=='u' && s.charAt(1)=='r') {id=Id_true; break L0;} } - else if (c=='s') { if (s.charAt(2)=='i' && s.charAt(1)=='h') {id=Id_this; break L0;} } - break L; - case 'v': X="void";id=Id_void; break L; - case 'w': X="with";id=Id_with; break L; - } break L; - case 5: switch (s.charAt(2)) { - case 'a': X="class";id=Id_class; break L; - case 'e': c=s.charAt(0); - if (c=='b') { X="break";id=Id_break; } - else if (c=='y') { X="yield";id=Id_yield; } - break L; - case 'i': X="while";id=Id_while; break L; - case 'l': X="false";id=Id_false; break L; - case 'n': c=s.charAt(0); - if (c=='c') { X="const";id=Id_const; } - else if (c=='f') { X="final";id=Id_final; } - break L; - case 'o': c=s.charAt(0); - if (c=='f') { X="float";id=Id_float; } - else if (c=='s') { X="short";id=Id_short; } - break L; - case 'p': X="super";id=Id_super; break L; - case 'r': X="throw";id=Id_throw; break L; - case 't': X="catch";id=Id_catch; break L; - } break L; - case 6: switch (s.charAt(1)) { - case 'a': X="native";id=Id_native; break L; - case 'e': c=s.charAt(0); - if (c=='d') { X="delete";id=Id_delete; } - else if (c=='r') { X="return";id=Id_return; } - break L; - case 'h': X="throws";id=Id_throws; break L; - /*APPJET*//* case 'm': X="import";id=Id_import; break L;*/ - case 'o': X="double";id=Id_double; break L; - case 't': X="static";id=Id_static; break L; - case 'u': X="public";id=Id_public; break L; - case 'w': X="switch";id=Id_switch; break L; - case 'x': X="export";id=Id_export; break L; - case 'y': X="typeof";id=Id_typeof; break L; - } break L; - case 7: switch (s.charAt(1)) { - case 'a': X="package";id=Id_package; break L; - case 'e': X="default";id=Id_default; break L; - case 'i': X="finally";id=Id_finally; break L; - case 'o': X="boolean";id=Id_boolean; break L; - case 'r': X="private";id=Id_private; break L; - case 'x': X="extends";id=Id_extends; break L; - } break L; - case 8: switch (s.charAt(0)) { - case 'a': X="abstract";id=Id_abstract; break L; - case 'c': X="continue";id=Id_continue; break L; - case 'd': X="debugger";id=Id_debugger; break L; - case 'f': X="function";id=Id_function; break L; - case 'v': X="volatile";id=Id_volatile; break L; - } break L; - case 9: c=s.charAt(0); - if (c=='i') { X="interface";id=Id_interface; } - else if (c=='p') { X="protected";id=Id_protected; } - else if (c=='t') { X="transient";id=Id_transient; } - break L; - case 10: c=s.charAt(1); - if (c=='m') { X="implements";id=Id_implements; } - else if (c=='n') { X="instanceof";id=Id_instanceof; } - break L; - case 12: X="synchronized";id=Id_synchronized; break L; - } - if (X!=null && X!=s && !X.equals(s)) id = 0; - } -// #/generated# -// #/string_id_map# - if (id == 0) { return Token.EOF; } - return id & 0xff; - } - - final int getLineno() { return lineno; } - - final String getString() { return string; } - - final double getNumber() { return number; } - - final boolean eof() { return hitEOF; } - - final int getToken() throws IOException - { - int c; - - retry: - for (;;) { - // Eat whitespace, possibly sensitive to newlines. - for (;;) { - c = getChar(); - if (c == EOF_CHAR) { - return Token.EOF; - } else if (c == '\n') { - dirtyLine = false; - return Token.EOL; - } else if (!isJSSpace(c)) { - if (c != '-') { - dirtyLine = true; - } - break; - } - } - - if (c == '@') return Token.XMLATTR; - - // identifier/keyword/instanceof? - // watch out for starting with a <backslash> - boolean identifierStart; - boolean isUnicodeEscapeStart = false; - if (c == '\\') { - c = getChar(); - if (c == 'u') { - identifierStart = true; - isUnicodeEscapeStart = true; - stringBufferTop = 0; - } else { - identifierStart = false; - ungetChar(c); - c = '\\'; - } - } else { - identifierStart = Character.isJavaIdentifierStart((char)c); - if (identifierStart) { - stringBufferTop = 0; - addToString(c); - } - } - - if (identifierStart) { - boolean containsEscape = isUnicodeEscapeStart; - for (;;) { - if (isUnicodeEscapeStart) { - // strictly speaking we should probably push-back - // all the bad characters if the <backslash>uXXXX - // sequence is malformed. But since there isn't a - // correct context(is there?) for a bad Unicode - // escape sequence in an identifier, we can report - // an error here. - int escapeVal = 0; - for (int i = 0; i != 4; ++i) { - c = getChar(); - escapeVal = Kit.xDigitToInt(c, escapeVal); - // Next check takes care about c < 0 and bad escape - if (escapeVal < 0) { break; } - } - if (escapeVal < 0) { - parser.addError("msg.invalid.escape"); - return Token.ERROR; - } - addToString(escapeVal); - isUnicodeEscapeStart = false; - } else { - c = getChar(); - if (c == '\\') { - c = getChar(); - if (c == 'u') { - isUnicodeEscapeStart = true; - containsEscape = true; - } else { - /*APPJET*/ - parser.addError("msg.illegal.character.appjet", - "\\"+Character.toString((char)c)); - return Token.ERROR; - } - } else { - if (c == EOF_CHAR - || !Character.isJavaIdentifierPart((char)c)) - { - break; - } - addToString(c); - } - } - } - ungetChar(c); - - String str = getStringFromBuffer(); - /*APPJET*//*MOVED*/this.string = (String)allStrings.intern(str); - /*APPJET this move lets the names of RESERVED tokens and other - tokens be determined, and also fixes broken yield/let parsing - under pre-1.7 JS */ - if (!containsEscape) { - // OPT we shouldn't have to make a string (object!) to - // check if it's a keyword. - - // Return the corresponding token if it's a keyword - int result = stringToKeyword(str); - if (result != Token.EOF) { - if ((result == Token.LET || result == Token.YIELD) && - parser.compilerEnv.getLanguageVersion() - < Context.VERSION_1_7) - { - // LET and YIELD are tokens only in 1.7 and later - result = Token.NAME; - } - if (result != Token.RESERVED) { - return result; - } else if (!parser.compilerEnv. - isReservedKeywordAsIdentifier()) - { - return result; - } else { - // If implementation permits to use future reserved - // keywords in violation with the EcmaScript, - // treat it as name but issue warning - parser.addWarning("msg.reserved.keyword", str); - } - } - } - return Token.NAME; - } - - // is it a number? - if (isDigit(c) || (c == '.' && isDigit(peekChar()))) { - - stringBufferTop = 0; - int base = 10; - - if (c == '0') { - c = getChar(); - if (c == 'x' || c == 'X') { - base = 16; - c = getChar(); - } else if (isDigit(c)) { - base = 8; - } else { - addToString('0'); - } - } - - if (base == 16) { - while (0 <= Kit.xDigitToInt(c, 0)) { - addToString(c); - c = getChar(); - } - } else { - while ('0' <= c && c <= '9') { - /* - * We permit 08 and 09 as decimal numbers, which - * makes our behavior a superset of the ECMA - * numeric grammar. We might not always be so - * permissive, so we warn about it. - */ - if (base == 8 && c >= '8') { - parser.addWarning("msg.bad.octal.literal", - c == '8' ? "8" : "9"); - base = 10; - } - addToString(c); - c = getChar(); - } - } - - boolean isInteger = true; - - if (base == 10 && (c == '.' || c == 'e' || c == 'E')) { - isInteger = false; - if (c == '.') { - do { - addToString(c); - c = getChar(); - } while (isDigit(c)); - } - if (c == 'e' || c == 'E') { - addToString(c); - c = getChar(); - if (c == '+' || c == '-') { - addToString(c); - c = getChar(); - } - if (!isDigit(c)) { - parser.addError("msg.missing.exponent"); - return Token.ERROR; - } - do { - addToString(c); - c = getChar(); - } while (isDigit(c)); - } - } - ungetChar(c); - String numString = getStringFromBuffer(); - - double dval; - if (base == 10 && !isInteger) { - try { - // Use Java conversion to number from string... - dval = Double.valueOf(numString).doubleValue(); - } - catch (NumberFormatException ex) { - parser.addError("msg.caught.nfe"); - return Token.ERROR; - } - } else { - dval = ScriptRuntime.stringToNumber(numString, 0, base); - } - - this.number = dval; - return Token.NUMBER; - } - - // is it a string? - if (c == '"' || c == '\'') { - // We attempt to accumulate a string the fast way, by - // building it directly out of the reader. But if there - // are any escaped characters in the string, we revert to - // building it out of a StringBuffer. - - /*APPJET*/ - if (c == '"' && tryReadTripleQuotedString()) { - return Token.STRING; - } - - int quoteChar = c; - stringBufferTop = 0; - - c = getChar(); - strLoop: while (c != quoteChar) { - if (c == '\n' || c == EOF_CHAR) { - ungetChar(c); - /*APPJET*/ - parser.addError("msg.unterminated.string.lit", - Character.toString((char)quoteChar)); - return Token.ERROR; - } - - if (c == '\\') { - // We've hit an escaped character - int escapeVal; - - c = getChar(); - switch (c) { - case 'b': c = '\b'; break; - case 'f': c = '\f'; break; - case 'n': c = '\n'; break; - case 'r': c = '\r'; break; - case 't': c = '\t'; break; - - // \v a late addition to the ECMA spec, - // it is not in Java, so use 0xb - case 'v': c = 0xb; break; - - case 'u': - // Get 4 hex digits; if the u escape is not - // followed by 4 hex digits, use 'u' + the - // literal character sequence that follows. - int escapeStart = stringBufferTop; - addToString('u'); - escapeVal = 0; - for (int i = 0; i != 4; ++i) { - c = getChar(); - escapeVal = Kit.xDigitToInt(c, escapeVal); - if (escapeVal < 0) { - continue strLoop; - } - addToString(c); - } - // prepare for replace of stored 'u' sequence - // by escape value - stringBufferTop = escapeStart; - c = escapeVal; - break; - case 'x': - // Get 2 hex digits, defaulting to 'x'+literal - // sequence, as above. - c = getChar(); - escapeVal = Kit.xDigitToInt(c, 0); - if (escapeVal < 0) { - addToString('x'); - continue strLoop; - } else { - int c1 = c; - c = getChar(); - escapeVal = Kit.xDigitToInt(c, escapeVal); - if (escapeVal < 0) { - addToString('x'); - addToString(c1); - continue strLoop; - } else { - // got 2 hex digits - c = escapeVal; - } - } - break; - - case '\n': - // Remove line terminator after escape to follow - // SpiderMonkey and C/C++ - c = getChar(); - continue strLoop; - - default: - if ('0' <= c && c < '8') { - int val = c - '0'; - c = getChar(); - if ('0' <= c && c < '8') { - val = 8 * val + c - '0'; - c = getChar(); - if ('0' <= c && c < '8' && val <= 037) { - // c is 3rd char of octal sequence only - // if the resulting val <= 0377 - val = 8 * val + c - '0'; - c = getChar(); - } - } - ungetChar(c); - c = val; - } - } - } - addToString(c); - c = getChar(); - } - - String str = getStringFromBuffer(); - this.string = (String)allStrings.intern(str); - return Token.STRING; - } - - switch (c) { - case ';': return Token.SEMI; - case '[': return Token.LB; - case ']': return Token.RB; - case '{': return Token.LC; - case '}': return Token.RC; - case '(': return Token.LP; - case ')': return Token.RP; - case ',': return Token.COMMA; - case '?': return Token.HOOK; - case ':': - if (matchChar(':')) { - return Token.COLONCOLON; - } else { - return Token.COLON; - } - case '.': - if (matchChar('.')) { - return Token.DOTDOT; - } else if (matchChar('(')) { - return Token.DOTQUERY; - } else { - return Token.DOT; - } - - case '|': - if (matchChar('|')) { - return Token.OR; - } else if (matchChar('=')) { - return Token.ASSIGN_BITOR; - } else { - return Token.BITOR; - } - - case '^': - if (matchChar('=')) { - return Token.ASSIGN_BITXOR; - } else { - return Token.BITXOR; - } - - case '&': - if (matchChar('&')) { - return Token.AND; - } else if (matchChar('=')) { - return Token.ASSIGN_BITAND; - } else { - return Token.BITAND; - } - - case '=': - if (matchChar('=')) { - if (matchChar('=')) - return Token.SHEQ; - else - return Token.EQ; - } else { - return Token.ASSIGN; - } - - case '!': - if (matchChar('=')) { - if (matchChar('=')) - return Token.SHNE; - else - return Token.NE; - } else { - return Token.NOT; - } - - case '<': - /* NB:treat HTML begin-comment as comment-till-eol */ - if (matchChar('!')) { - if (matchChar('-')) { - if (matchChar('-')) { - skipLine(); - continue retry; - } - ungetChar('-'); - } - ungetChar('!'); - } - if (matchChar('<')) { - if (matchChar('=')) { - return Token.ASSIGN_LSH; - } else { - return Token.LSH; - } - } else { - if (matchChar('=')) { - return Token.LE; - } else { - return Token.LT; - } - } - - case '>': - if (matchChar('>')) { - if (matchChar('>')) { - if (matchChar('=')) { - return Token.ASSIGN_URSH; - } else { - return Token.URSH; - } - } else { - if (matchChar('=')) { - return Token.ASSIGN_RSH; - } else { - return Token.RSH; - } - } - } else { - if (matchChar('=')) { - return Token.GE; - } else { - return Token.GT; - } - } - - case '*': - if (matchChar('=')) { - return Token.ASSIGN_MUL; - } else { - return Token.MUL; - } - - case '/': - // is it a // comment? - if (matchChar('/')) { - skipLine(); - continue retry; - } - if (matchChar('*')) { - boolean lookForSlash = false; - for (;;) { - c = getChar(); - if (c == EOF_CHAR) { - parser.addError("msg.unterminated.comment"); - return Token.ERROR; - } else if (c == '*') { - lookForSlash = true; - } else if (c == '/') { - if (lookForSlash) { - continue retry; - } - } else { - lookForSlash = false; - } - } - } - - if (matchChar('=')) { - return Token.ASSIGN_DIV; - } else { - return Token.DIV; - } - - case '%': - if (matchChar('=')) { - return Token.ASSIGN_MOD; - } else { - return Token.MOD; - } - - case '~': - return Token.BITNOT; - - case '+': - if (matchChar('=')) { - return Token.ASSIGN_ADD; - } else if (matchChar('+')) { - return Token.INC; - } else { - return Token.ADD; - } - - case '-': - if (matchChar('=')) { - c = Token.ASSIGN_SUB; - } else if (matchChar('-')) { - if (!dirtyLine) { - // treat HTML end-comment after possible whitespace - // after line start as comment-utill-eol - if (matchChar('>')) { - skipLine(); - continue retry; - } - } - c = Token.DEC; - } else { - c = Token.SUB; - } - dirtyLine = true; - return c; - - default: - /*APPJET*/ - parser.addError("msg.illegal.character.appjet", - Character.toString((char)c)); - return Token.ERROR; - } - } - } - - private static boolean isAlpha(int c) - { - // Use 'Z' < 'a' - if (c <= 'Z') { - return 'A' <= c; - } else { - return 'a' <= c && c <= 'z'; - } - } - - static boolean isDigit(int c) - { - return '0' <= c && c <= '9'; - } - - /* As defined in ECMA. jsscan.c uses C isspace() (which allows - * \v, I think.) note that code in getChar() implicitly accepts - * '\r' == \u000D as well. - */ - static boolean isJSSpace(int c) - { - if (c <= 127) { - return c == 0x20 || c == 0x9 || c == 0xC || c == 0xB; - } else { - return c == 0xA0 - || Character.getType((char)c) == Character.SPACE_SEPARATOR; - } - } - - private static boolean isJSFormatChar(int c) - { - return c > 127 && Character.getType((char)c) == Character.FORMAT; - } - - /** - * Parser calls the method when it gets / or /= in literal context. - */ - void readRegExp(int startToken) - throws IOException - { - stringBufferTop = 0; - if (startToken == Token.ASSIGN_DIV) { - // Miss-scanned /= - addToString('='); - } else { - if (startToken != Token.DIV) Kit.codeBug(); - } - - int c; - while ((c = getChar()) != '/') { - if (c == '\n' || c == EOF_CHAR) { - ungetChar(c); - throw parser.reportError("msg.unterminated.re.lit"); - } - if (c == '\\') { - addToString(c); - c = getChar(); - } - - addToString(c); - } - int reEnd = stringBufferTop; - - while (true) { - if (matchChar('g')) - addToString('g'); - else if (matchChar('i')) - addToString('i'); - else if (matchChar('m')) - addToString('m'); - else - break; - } - - if (isAlpha(peekChar())) { - throw parser.reportError("msg.invalid.re.flag"); - } - - this.string = new String(stringBuffer, 0, reEnd); - this.regExpFlags = new String(stringBuffer, reEnd, - stringBufferTop - reEnd); - } - - boolean isXMLAttribute() - { - return xmlIsAttribute; - } - - int getFirstXMLToken() throws IOException - { - xmlOpenTagsCount = 0; - xmlIsAttribute = false; - xmlIsTagContent = false; - ungetChar('<'); - return getNextXMLToken(); - } - - int getNextXMLToken() throws IOException - { - stringBufferTop = 0; // remember the XML - - for (int c = getChar(); c != EOF_CHAR; c = getChar()) { - if (xmlIsTagContent) { - switch (c) { - case '>': - addToString(c); - xmlIsTagContent = false; - xmlIsAttribute = false; - break; - case '/': - addToString(c); - if (peekChar() == '>') { - c = getChar(); - addToString(c); - xmlIsTagContent = false; - xmlOpenTagsCount--; - } - break; - case '{': - ungetChar(c); - this.string = getStringFromBuffer(); - return Token.XML; - case '\'': - case '"': - addToString(c); - if (!readQuotedString(c)) return Token.ERROR; - break; - case '=': - addToString(c); - xmlIsAttribute = true; - break; - case ' ': - case '\t': - case '\r': - case '\n': - addToString(c); - break; - default: - addToString(c); - xmlIsAttribute = false; - break; - } - - if (!xmlIsTagContent && xmlOpenTagsCount == 0) { - this.string = getStringFromBuffer(); - return Token.XMLEND; - } - } else { - switch (c) { - case '<': - addToString(c); - c = peekChar(); - switch (c) { - case '!': - c = getChar(); // Skip ! - addToString(c); - c = peekChar(); - switch (c) { - case '-': - c = getChar(); // Skip - - addToString(c); - c = getChar(); - if (c == '-') { - addToString(c); - if(!readXmlComment()) return Token.ERROR; - } else { - // throw away the string in progress - stringBufferTop = 0; - this.string = null; - parser.addError("msg.XML.bad.form"); - return Token.ERROR; - } - break; - case '[': - c = getChar(); // Skip [ - addToString(c); - if (getChar() == 'C' && - getChar() == 'D' && - getChar() == 'A' && - getChar() == 'T' && - getChar() == 'A' && - getChar() == '[') - { - addToString('C'); - addToString('D'); - addToString('A'); - addToString('T'); - addToString('A'); - addToString('['); - if (!readCDATA()) return Token.ERROR; - - } else { - // throw away the string in progress - stringBufferTop = 0; - this.string = null; - parser.addError("msg.XML.bad.form"); - return Token.ERROR; - } - break; - default: - if(!readEntity()) return Token.ERROR; - break; - } - break; - case '?': - c = getChar(); // Skip ? - addToString(c); - if (!readPI()) return Token.ERROR; - break; - case '/': - // End tag - c = getChar(); // Skip / - addToString(c); - if (xmlOpenTagsCount == 0) { - // throw away the string in progress - stringBufferTop = 0; - this.string = null; - parser.addError("msg.XML.bad.form"); - return Token.ERROR; - } - xmlIsTagContent = true; - xmlOpenTagsCount--; - break; - default: - // Start tag - xmlIsTagContent = true; - xmlOpenTagsCount++; - break; - } - break; - case '{': - ungetChar(c); - this.string = getStringFromBuffer(); - return Token.XML; - default: - addToString(c); - break; - } - } - } - - stringBufferTop = 0; // throw away the string in progress - this.string = null; - parser.addError("msg.XML.bad.form"); - return Token.ERROR; - } - - /** - * - */ - private boolean readQuotedString(int quote) throws IOException - { - for (int c = getChar(); c != EOF_CHAR; c = getChar()) { - addToString(c); - if (c == quote) return true; - } - - stringBufferTop = 0; // throw away the string in progress - this.string = null; - parser.addError("msg.XML.bad.form"); - return false; - } - - /** - * - */ - private boolean readXmlComment() throws IOException - { - for (int c = getChar(); c != EOF_CHAR;) { - addToString(c); - if (c == '-' && peekChar() == '-') { - c = getChar(); - addToString(c); - if (peekChar() == '>') { - c = getChar(); // Skip > - addToString(c); - return true; - } else { - continue; - } - } - c = getChar(); - } - - stringBufferTop = 0; // throw away the string in progress - this.string = null; - parser.addError("msg.XML.bad.form"); - return false; - } - - /** - * - */ - private boolean readCDATA() throws IOException - { - for (int c = getChar(); c != EOF_CHAR;) { - addToString(c); - if (c == ']' && peekChar() == ']') { - c = getChar(); - addToString(c); - if (peekChar() == '>') { - c = getChar(); // Skip > - addToString(c); - return true; - } else { - continue; - } - } - c = getChar(); - } - - stringBufferTop = 0; // throw away the string in progress - this.string = null; - parser.addError("msg.XML.bad.form"); - return false; - } - - /** - * - */ - private boolean readEntity() throws IOException - { - int declTags = 1; - for (int c = getChar(); c != EOF_CHAR; c = getChar()) { - addToString(c); - switch (c) { - case '<': - declTags++; - break; - case '>': - declTags--; - if (declTags == 0) return true; - break; - } - } - - stringBufferTop = 0; // throw away the string in progress - this.string = null; - parser.addError("msg.XML.bad.form"); - return false; - } - - /** - * - */ - private boolean readPI() throws IOException - { - for (int c = getChar(); c != EOF_CHAR; c = getChar()) { - addToString(c); - if (c == '?' && peekChar() == '>') { - c = getChar(); // Skip > - addToString(c); - return true; - } - } - - stringBufferTop = 0; // throw away the string in progress - this.string = null; - parser.addError("msg.XML.bad.form"); - return false; - } - - private String getStringFromBuffer() - { - return new String(stringBuffer, 0, stringBufferTop); - } - - private void addToString(int c) - { - int N = stringBufferTop; - if (N == stringBuffer.length) { - char[] tmp = new char[stringBuffer.length * 2]; - System.arraycopy(stringBuffer, 0, tmp, 0, N); - stringBuffer = tmp; - } - stringBuffer[N] = (char)c; - stringBufferTop = N + 1; - } - - private void ungetChar(int c) - { - // can not unread past across line boundary - if (ungetCursor != 0 && ungetBuffer[ungetCursor - 1] == '\n') - Kit.codeBug(); - ungetBuffer[ungetCursor++] = c; - } - - private boolean matchChar(int test) throws IOException - { - int c = getChar(); - if (c == test) { - return true; - } else { - ungetChar(c); - return false; - } - } - - private int peekChar() throws IOException - { - int c = getChar(); - ungetChar(c); - return c; - } - - private int getChar() throws IOException - { - if (ungetCursor != 0) { - return ungetBuffer[--ungetCursor]; - } - - for(;;) { - int c; - if (sourceString != null) { - if (sourceCursor == sourceEnd) { - hitEOF = true; - return EOF_CHAR; - } - c = sourceString.charAt(sourceCursor++); - } else { - if (sourceCursor == sourceEnd) { - if (!fillSourceBuffer()) { - hitEOF = true; - return EOF_CHAR; - } - } - c = sourceBuffer[sourceCursor++]; - } - - if (lineEndChar >= 0) { - if (lineEndChar == '\r' && c == '\n') { - lineEndChar = '\n'; - continue; - } - lineEndChar = -1; - lineStart = sourceCursor - 1; - lineno++; - } - - if (c <= 127) { - if (c == '\n' || c == '\r') { - lineEndChar = c; - c = '\n'; - } - } else { - if (isJSFormatChar(c)) { - continue; - } - if (ScriptRuntime.isJSLineTerminator(c)) { - lineEndChar = c; - c = '\n'; - } - } - return c; - } - } - - private void skipLine() throws IOException - { - // skip to end of line - int c; - while ((c = getChar()) != EOF_CHAR && c != '\n') { } - ungetChar(c); - } - - final int getOffset() - { - int n = sourceCursor - lineStart; - if (lineEndChar >= 0) { --n; } - return n; - } - - final String getLine() - { - if (sourceString != null) { - // String case - int lineEnd = sourceCursor; - if (lineEndChar >= 0) { - --lineEnd; - } else { - for (; lineEnd != sourceEnd; ++lineEnd) { - int c = sourceString.charAt(lineEnd); - if (ScriptRuntime.isJSLineTerminator(c)) { - break; - } - } - } - return sourceString.substring(lineStart, lineEnd); - } else { - // Reader case - int lineLength = sourceCursor - lineStart; - if (lineEndChar >= 0) { - --lineLength; - } else { - // Read until the end of line - for (;; ++lineLength) { - int i = lineStart + lineLength; - if (i == sourceEnd) { - try { - if (!fillSourceBuffer()) { break; } - } catch (IOException ioe) { - // ignore it, we're already displaying an error... - break; - } - // i recalculuation as fillSourceBuffer can move saved - // line buffer and change lineStart - i = lineStart + lineLength; - } - int c = sourceBuffer[i]; - if (ScriptRuntime.isJSLineTerminator(c)) { - break; - } - } - } - return new String(sourceBuffer, lineStart, lineLength); - } - } - - private boolean fillSourceBuffer() throws IOException - { - if (sourceString != null) Kit.codeBug(); - if (sourceEnd == sourceBuffer.length) { - if (lineStart != 0) { - System.arraycopy(sourceBuffer, lineStart, sourceBuffer, 0, - sourceEnd - lineStart); - sourceEnd -= lineStart; - sourceCursor -= lineStart; - lineStart = 0; - } else { - char[] tmp = new char[sourceBuffer.length * 2]; - System.arraycopy(sourceBuffer, 0, tmp, 0, sourceEnd); - sourceBuffer = tmp; - } - } - int n = sourceReader.read(sourceBuffer, sourceEnd, - sourceBuffer.length - sourceEnd); - if (n < 0) { - return false; - } - sourceEnd += n; - return true; - } - - // stuff other than whitespace since start of line - private boolean dirtyLine; - - String regExpFlags; - - // Set this to an inital non-null value so that the Parser has - // something to retrieve even if an error has occured and no - // string is found. Fosters one class of error, but saves lots of - // code. - private String string = ""; - private double number; - - private char[] stringBuffer = new char[128]; - private int stringBufferTop; - private ObjToIntMap allStrings = new ObjToIntMap(50); - - // Room to backtrace from to < on failed match of the last - in <!-- - private final int[] ungetBuffer = new int[3]; - private int ungetCursor; - - private boolean hitEOF = false; - - private int lineStart = 0; - private int lineno; - private int lineEndChar = -1; - - private String sourceString; - private Reader sourceReader; - private char[] sourceBuffer; - private int sourceEnd; - private int sourceCursor; - - // for xml tokenizer - private boolean xmlIsAttribute; - private boolean xmlIsTagContent; - private int xmlOpenTagsCount; - - private Parser parser; - - /*APPJET*//* added method */ - private boolean tryReadTripleQuotedString() throws IOException { - // have to be kind of clever, because we don't want to - // add to the overhead of tokenizing, but there are constraints - // like "once you've gotten a newline and put it back (ungotten it), - // you can't put anything else back" - - // have seen one quote - int c = getChar(); - if (c != '"') { ungetChar(c); return false; } - // have seen two quotes - c = getChar(); - if (c != '"') { - ungetChar(c); - this.string = (String)allStrings.intern(""); - return true; - } - // have seen three quotes - - final boolean newPolicy = false; - - stringBufferTop = 0; - - boolean afterBackslash = false; - boolean done = false; - while (! done) { - c = getChar(); - if (c == EOF_CHAR) { - ungetChar(c); - throw parser.reportError("msg.unterminated.mstring.appjet"); - } - if (c == '"') { - int quoteCount = 0; - int quoteLimit = 3; - if (newPolicy && ! afterBackslash) - quoteLimit = 5; - while (c == '"' && quoteCount < quoteLimit) { - quoteCount++; - c = getChar(); - } - ungetChar(c); - - if (afterBackslash) { - if (quoteCount < 3) addToString('\\'); - } - else if (quoteCount >= 3) { - quoteCount -= 3; - done = true; - } - - while (quoteCount > 0) { - addToString('"'); quoteCount--; - } - afterBackslash = false; - } - else { - if (afterBackslash) { - addToString('\\'); - afterBackslash = false; - } - if (c == '\\') { - afterBackslash = true; - } - else { - addToString(c); - } - } - } - - String str = getStringFromBuffer(); - this.string = (String)allStrings.intern(str); - - return true; - } -} |