1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/parser/html/javasrc/MetaScanner.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,843 @@
1.4 +/*
1.5 + * Copyright (c) 2007 Henri Sivonen
1.6 + * Copyright (c) 2008-2010 Mozilla Foundation
1.7 + *
1.8 + * Permission is hereby granted, free of charge, to any person obtaining a
1.9 + * copy of this software and associated documentation files (the "Software"),
1.10 + * to deal in the Software without restriction, including without limitation
1.11 + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
1.12 + * and/or sell copies of the Software, and to permit persons to whom the
1.13 + * Software is furnished to do so, subject to the following conditions:
1.14 + *
1.15 + * The above copyright notice and this permission notice shall be included in
1.16 + * all copies or substantial portions of the Software.
1.17 + *
1.18 + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1.19 + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
1.20 + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
1.21 + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
1.22 + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
1.23 + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
1.24 + * DEALINGS IN THE SOFTWARE.
1.25 + */
1.26 +
1.27 +package nu.validator.htmlparser.impl;
1.28 +
1.29 +import java.io.IOException;
1.30 +
1.31 +import nu.validator.htmlparser.annotation.Auto;
1.32 +import nu.validator.htmlparser.annotation.Inline;
1.33 +import nu.validator.htmlparser.common.ByteReadable;
1.34 +
1.35 +import org.xml.sax.SAXException;
1.36 +
1.37 +public abstract class MetaScanner {
1.38 +
1.39 + /**
1.40 + * Constant for "charset".
1.41 + */
1.42 + private static final char[] CHARSET = { 'h', 'a', 'r', 's', 'e', 't' };
1.43 +
1.44 + /**
1.45 + * Constant for "content".
1.46 + */
1.47 + private static final char[] CONTENT = { 'o', 'n', 't', 'e', 'n', 't' };
1.48 +
1.49 + /**
1.50 + * Constant for "http-equiv".
1.51 + */
1.52 + private static final char[] HTTP_EQUIV = { 't', 't', 'p', '-', 'e', 'q',
1.53 + 'u', 'i', 'v' };
1.54 +
1.55 + /**
1.56 + * Constant for "content-type".
1.57 + */
1.58 + private static final char[] CONTENT_TYPE = { 'c', 'o', 'n', 't', 'e', 'n',
1.59 + 't', '-', 't', 'y', 'p', 'e' };
1.60 +
1.61 + private static final int NO = 0;
1.62 +
1.63 + private static final int M = 1;
1.64 +
1.65 + private static final int E = 2;
1.66 +
1.67 + private static final int T = 3;
1.68 +
1.69 + private static final int A = 4;
1.70 +
1.71 + private static final int DATA = 0;
1.72 +
1.73 + private static final int TAG_OPEN = 1;
1.74 +
1.75 + private static final int SCAN_UNTIL_GT = 2;
1.76 +
1.77 + private static final int TAG_NAME = 3;
1.78 +
1.79 + private static final int BEFORE_ATTRIBUTE_NAME = 4;
1.80 +
1.81 + private static final int ATTRIBUTE_NAME = 5;
1.82 +
1.83 + private static final int AFTER_ATTRIBUTE_NAME = 6;
1.84 +
1.85 + private static final int BEFORE_ATTRIBUTE_VALUE = 7;
1.86 +
1.87 + private static final int ATTRIBUTE_VALUE_DOUBLE_QUOTED = 8;
1.88 +
1.89 + private static final int ATTRIBUTE_VALUE_SINGLE_QUOTED = 9;
1.90 +
1.91 + private static final int ATTRIBUTE_VALUE_UNQUOTED = 10;
1.92 +
1.93 + private static final int AFTER_ATTRIBUTE_VALUE_QUOTED = 11;
1.94 +
1.95 + private static final int MARKUP_DECLARATION_OPEN = 13;
1.96 +
1.97 + private static final int MARKUP_DECLARATION_HYPHEN = 14;
1.98 +
1.99 + private static final int COMMENT_START = 15;
1.100 +
1.101 + private static final int COMMENT_START_DASH = 16;
1.102 +
1.103 + private static final int COMMENT = 17;
1.104 +
1.105 + private static final int COMMENT_END_DASH = 18;
1.106 +
1.107 + private static final int COMMENT_END = 19;
1.108 +
1.109 + private static final int SELF_CLOSING_START_TAG = 20;
1.110 +
1.111 + private static final int HTTP_EQUIV_NOT_SEEN = 0;
1.112 +
1.113 + private static final int HTTP_EQUIV_CONTENT_TYPE = 1;
1.114 +
1.115 + private static final int HTTP_EQUIV_OTHER = 2;
1.116 +
1.117 + /**
1.118 + * The data source.
1.119 + */
1.120 + protected ByteReadable readable;
1.121 +
1.122 + /**
1.123 + * The state of the state machine that recognizes the tag name "meta".
1.124 + */
1.125 + private int metaState = NO;
1.126 +
1.127 + /**
1.128 + * The current position in recognizing the attribute name "content".
1.129 + */
1.130 + private int contentIndex = Integer.MAX_VALUE;
1.131 +
1.132 + /**
1.133 + * The current position in recognizing the attribute name "charset".
1.134 + */
1.135 + private int charsetIndex = Integer.MAX_VALUE;
1.136 +
1.137 + /**
1.138 + * The current position in recognizing the attribute name "http-equive".
1.139 + */
1.140 + private int httpEquivIndex = Integer.MAX_VALUE;
1.141 +
1.142 + /**
1.143 + * The current position in recognizing the attribute value "content-type".
1.144 + */
1.145 + private int contentTypeIndex = Integer.MAX_VALUE;
1.146 +
1.147 + /**
1.148 + * The tokenizer state.
1.149 + */
1.150 + protected int stateSave = DATA;
1.151 +
1.152 + /**
1.153 + * The currently filled length of strBuf.
1.154 + */
1.155 + private int strBufLen;
1.156 +
1.157 + /**
1.158 + * Accumulation buffer for attribute values.
1.159 + */
1.160 + private @Auto char[] strBuf;
1.161 +
1.162 + private String content;
1.163 +
1.164 + private String charset;
1.165 +
1.166 + private int httpEquivState;
1.167 +
1.168 + public MetaScanner() {
1.169 + this.readable = null;
1.170 + this.metaState = NO;
1.171 + this.contentIndex = Integer.MAX_VALUE;
1.172 + this.charsetIndex = Integer.MAX_VALUE;
1.173 + this.httpEquivIndex = Integer.MAX_VALUE;
1.174 + this.contentTypeIndex = Integer.MAX_VALUE;
1.175 + this.stateSave = DATA;
1.176 + this.strBufLen = 0;
1.177 + this.strBuf = new char[36];
1.178 + this.content = null;
1.179 + this.charset = null;
1.180 + this.httpEquivState = HTTP_EQUIV_NOT_SEEN;
1.181 + }
1.182 +
1.183 + @SuppressWarnings("unused") private void destructor() {
1.184 + Portability.releaseString(content);
1.185 + Portability.releaseString(charset);
1.186 + }
1.187 +
1.188 + // [NOCPP[
1.189 +
1.190 + /**
1.191 + * Reads a byte from the data source.
1.192 + *
1.193 + * -1 means end.
1.194 + * @return
1.195 + * @throws IOException
1.196 + */
1.197 + protected int read() throws IOException {
1.198 + return readable.readByte();
1.199 + }
1.200 +
1.201 + // ]NOCPP]
1.202 +
1.203 + // WARNING When editing this, makes sure the bytecode length shown by javap
1.204 + // stays under 8000 bytes!
1.205 + /**
1.206 + * The runs the meta scanning algorithm.
1.207 + */
1.208 + protected final void stateLoop(int state)
1.209 + throws SAXException, IOException {
1.210 + int c = -1;
1.211 + boolean reconsume = false;
1.212 + stateloop: for (;;) {
1.213 + switch (state) {
1.214 + case DATA:
1.215 + dataloop: for (;;) {
1.216 + if (reconsume) {
1.217 + reconsume = false;
1.218 + } else {
1.219 + c = read();
1.220 + }
1.221 + switch (c) {
1.222 + case -1:
1.223 + break stateloop;
1.224 + case '<':
1.225 + state = MetaScanner.TAG_OPEN;
1.226 + break dataloop; // FALL THROUGH continue
1.227 + // stateloop;
1.228 + default:
1.229 + continue;
1.230 + }
1.231 + }
1.232 + // WARNING FALLTHRU CASE TRANSITION: DON'T REORDER
1.233 + case TAG_OPEN:
1.234 + tagopenloop: for (;;) {
1.235 + c = read();
1.236 + switch (c) {
1.237 + case -1:
1.238 + break stateloop;
1.239 + case 'm':
1.240 + case 'M':
1.241 + metaState = M;
1.242 + state = MetaScanner.TAG_NAME;
1.243 + break tagopenloop;
1.244 + // continue stateloop;
1.245 + case '!':
1.246 + state = MetaScanner.MARKUP_DECLARATION_OPEN;
1.247 + continue stateloop;
1.248 + case '?':
1.249 + case '/':
1.250 + state = MetaScanner.SCAN_UNTIL_GT;
1.251 + continue stateloop;
1.252 + case '>':
1.253 + state = MetaScanner.DATA;
1.254 + continue stateloop;
1.255 + default:
1.256 + if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) {
1.257 + metaState = NO;
1.258 + state = MetaScanner.TAG_NAME;
1.259 + break tagopenloop;
1.260 + // continue stateloop;
1.261 + }
1.262 + state = MetaScanner.DATA;
1.263 + reconsume = true;
1.264 + continue stateloop;
1.265 + }
1.266 + }
1.267 + // FALL THROUGH DON'T REORDER
1.268 + case TAG_NAME:
1.269 + tagnameloop: for (;;) {
1.270 + c = read();
1.271 + switch (c) {
1.272 + case -1:
1.273 + break stateloop;
1.274 + case ' ':
1.275 + case '\t':
1.276 + case '\n':
1.277 + case '\u000C':
1.278 + state = MetaScanner.BEFORE_ATTRIBUTE_NAME;
1.279 + break tagnameloop;
1.280 + // continue stateloop;
1.281 + case '/':
1.282 + state = MetaScanner.SELF_CLOSING_START_TAG;
1.283 + continue stateloop;
1.284 + case '>':
1.285 + state = MetaScanner.DATA;
1.286 + continue stateloop;
1.287 + case 'e':
1.288 + case 'E':
1.289 + if (metaState == M) {
1.290 + metaState = E;
1.291 + } else {
1.292 + metaState = NO;
1.293 + }
1.294 + continue;
1.295 + case 't':
1.296 + case 'T':
1.297 + if (metaState == E) {
1.298 + metaState = T;
1.299 + } else {
1.300 + metaState = NO;
1.301 + }
1.302 + continue;
1.303 + case 'a':
1.304 + case 'A':
1.305 + if (metaState == T) {
1.306 + metaState = A;
1.307 + } else {
1.308 + metaState = NO;
1.309 + }
1.310 + continue;
1.311 + default:
1.312 + metaState = NO;
1.313 + continue;
1.314 + }
1.315 + }
1.316 + // FALLTHRU DON'T REORDER
1.317 + case BEFORE_ATTRIBUTE_NAME:
1.318 + beforeattributenameloop: for (;;) {
1.319 + if (reconsume) {
1.320 + reconsume = false;
1.321 + } else {
1.322 + c = read();
1.323 + }
1.324 + /*
1.325 + * Consume the next input character:
1.326 + */
1.327 + switch (c) {
1.328 + case -1:
1.329 + break stateloop;
1.330 + case ' ':
1.331 + case '\t':
1.332 + case '\n':
1.333 + case '\u000C':
1.334 + continue;
1.335 + case '/':
1.336 + state = MetaScanner.SELF_CLOSING_START_TAG;
1.337 + continue stateloop;
1.338 + case '>':
1.339 + if (handleTag()) {
1.340 + break stateloop;
1.341 + }
1.342 + state = DATA;
1.343 + continue stateloop;
1.344 + case 'c':
1.345 + case 'C':
1.346 + contentIndex = 0;
1.347 + charsetIndex = 0;
1.348 + httpEquivIndex = Integer.MAX_VALUE;
1.349 + contentTypeIndex = Integer.MAX_VALUE;
1.350 + state = MetaScanner.ATTRIBUTE_NAME;
1.351 + break beforeattributenameloop;
1.352 + case 'h':
1.353 + case 'H':
1.354 + contentIndex = Integer.MAX_VALUE;
1.355 + charsetIndex = Integer.MAX_VALUE;
1.356 + httpEquivIndex = 0;
1.357 + contentTypeIndex = Integer.MAX_VALUE;
1.358 + state = MetaScanner.ATTRIBUTE_NAME;
1.359 + break beforeattributenameloop;
1.360 + default:
1.361 + contentIndex = Integer.MAX_VALUE;
1.362 + charsetIndex = Integer.MAX_VALUE;
1.363 + httpEquivIndex = Integer.MAX_VALUE;
1.364 + contentTypeIndex = Integer.MAX_VALUE;
1.365 + state = MetaScanner.ATTRIBUTE_NAME;
1.366 + break beforeattributenameloop;
1.367 + // continue stateloop;
1.368 + }
1.369 + }
1.370 + // FALLTHRU DON'T REORDER
1.371 + case ATTRIBUTE_NAME:
1.372 + attributenameloop: for (;;) {
1.373 + c = read();
1.374 + switch (c) {
1.375 + case -1:
1.376 + break stateloop;
1.377 + case ' ':
1.378 + case '\t':
1.379 + case '\n':
1.380 + case '\u000C':
1.381 + state = MetaScanner.AFTER_ATTRIBUTE_NAME;
1.382 + continue stateloop;
1.383 + case '/':
1.384 + state = MetaScanner.SELF_CLOSING_START_TAG;
1.385 + continue stateloop;
1.386 + case '=':
1.387 + strBufLen = 0;
1.388 + contentTypeIndex = 0;
1.389 + state = MetaScanner.BEFORE_ATTRIBUTE_VALUE;
1.390 + break attributenameloop;
1.391 + // continue stateloop;
1.392 + case '>':
1.393 + if (handleTag()) {
1.394 + break stateloop;
1.395 + }
1.396 + state = MetaScanner.DATA;
1.397 + continue stateloop;
1.398 + default:
1.399 + if (metaState == A) {
1.400 + if (c >= 'A' && c <= 'Z') {
1.401 + c += 0x20;
1.402 + }
1.403 + if (contentIndex < CONTENT.length && c == CONTENT[contentIndex]) {
1.404 + ++contentIndex;
1.405 + } else {
1.406 + contentIndex = Integer.MAX_VALUE;
1.407 + }
1.408 + if (charsetIndex < CHARSET.length && c == CHARSET[charsetIndex]) {
1.409 + ++charsetIndex;
1.410 + } else {
1.411 + charsetIndex = Integer.MAX_VALUE;
1.412 + }
1.413 + if (httpEquivIndex < HTTP_EQUIV.length && c == HTTP_EQUIV[httpEquivIndex]) {
1.414 + ++httpEquivIndex;
1.415 + } else {
1.416 + httpEquivIndex = Integer.MAX_VALUE;
1.417 + }
1.418 + }
1.419 + continue;
1.420 + }
1.421 + }
1.422 + // FALLTHRU DON'T REORDER
1.423 + case BEFORE_ATTRIBUTE_VALUE:
1.424 + beforeattributevalueloop: for (;;) {
1.425 + c = read();
1.426 + switch (c) {
1.427 + case -1:
1.428 + break stateloop;
1.429 + case ' ':
1.430 + case '\t':
1.431 + case '\n':
1.432 + case '\u000C':
1.433 + continue;
1.434 + case '"':
1.435 + state = MetaScanner.ATTRIBUTE_VALUE_DOUBLE_QUOTED;
1.436 + break beforeattributevalueloop;
1.437 + // continue stateloop;
1.438 + case '\'':
1.439 + state = MetaScanner.ATTRIBUTE_VALUE_SINGLE_QUOTED;
1.440 + continue stateloop;
1.441 + case '>':
1.442 + if (handleTag()) {
1.443 + break stateloop;
1.444 + }
1.445 + state = MetaScanner.DATA;
1.446 + continue stateloop;
1.447 + default:
1.448 + handleCharInAttributeValue(c);
1.449 + state = MetaScanner.ATTRIBUTE_VALUE_UNQUOTED;
1.450 + continue stateloop;
1.451 + }
1.452 + }
1.453 + // FALLTHRU DON'T REORDER
1.454 + case ATTRIBUTE_VALUE_DOUBLE_QUOTED:
1.455 + attributevaluedoublequotedloop: for (;;) {
1.456 + if (reconsume) {
1.457 + reconsume = false;
1.458 + } else {
1.459 + c = read();
1.460 + }
1.461 + switch (c) {
1.462 + case -1:
1.463 + break stateloop;
1.464 + case '"':
1.465 + handleAttributeValue();
1.466 + state = MetaScanner.AFTER_ATTRIBUTE_VALUE_QUOTED;
1.467 + break attributevaluedoublequotedloop;
1.468 + // continue stateloop;
1.469 + default:
1.470 + handleCharInAttributeValue(c);
1.471 + continue;
1.472 + }
1.473 + }
1.474 + // FALLTHRU DON'T REORDER
1.475 + case AFTER_ATTRIBUTE_VALUE_QUOTED:
1.476 + afterattributevaluequotedloop: for (;;) {
1.477 + c = read();
1.478 + switch (c) {
1.479 + case -1:
1.480 + break stateloop;
1.481 + case ' ':
1.482 + case '\t':
1.483 + case '\n':
1.484 + case '\u000C':
1.485 + state = MetaScanner.BEFORE_ATTRIBUTE_NAME;
1.486 + continue stateloop;
1.487 + case '/':
1.488 + state = MetaScanner.SELF_CLOSING_START_TAG;
1.489 + break afterattributevaluequotedloop;
1.490 + // continue stateloop;
1.491 + case '>':
1.492 + if (handleTag()) {
1.493 + break stateloop;
1.494 + }
1.495 + state = MetaScanner.DATA;
1.496 + continue stateloop;
1.497 + default:
1.498 + state = MetaScanner.BEFORE_ATTRIBUTE_NAME;
1.499 + reconsume = true;
1.500 + continue stateloop;
1.501 + }
1.502 + }
1.503 + // FALLTHRU DON'T REORDER
1.504 + case SELF_CLOSING_START_TAG:
1.505 + c = read();
1.506 + switch (c) {
1.507 + case -1:
1.508 + break stateloop;
1.509 + case '>':
1.510 + if (handleTag()) {
1.511 + break stateloop;
1.512 + }
1.513 + state = MetaScanner.DATA;
1.514 + continue stateloop;
1.515 + default:
1.516 + state = MetaScanner.BEFORE_ATTRIBUTE_NAME;
1.517 + reconsume = true;
1.518 + continue stateloop;
1.519 + }
1.520 + // XXX reorder point
1.521 + case ATTRIBUTE_VALUE_UNQUOTED:
1.522 + for (;;) {
1.523 + if (reconsume) {
1.524 + reconsume = false;
1.525 + } else {
1.526 + c = read();
1.527 + }
1.528 + switch (c) {
1.529 + case -1:
1.530 + break stateloop;
1.531 + case ' ':
1.532 + case '\t':
1.533 + case '\n':
1.534 +
1.535 + case '\u000C':
1.536 + handleAttributeValue();
1.537 + state = MetaScanner.BEFORE_ATTRIBUTE_NAME;
1.538 + continue stateloop;
1.539 + case '>':
1.540 + handleAttributeValue();
1.541 + if (handleTag()) {
1.542 + break stateloop;
1.543 + }
1.544 + state = MetaScanner.DATA;
1.545 + continue stateloop;
1.546 + default:
1.547 + handleCharInAttributeValue(c);
1.548 + continue;
1.549 + }
1.550 + }
1.551 + // XXX reorder point
1.552 + case AFTER_ATTRIBUTE_NAME:
1.553 + for (;;) {
1.554 + c = read();
1.555 + switch (c) {
1.556 + case -1:
1.557 + break stateloop;
1.558 + case ' ':
1.559 + case '\t':
1.560 + case '\n':
1.561 + case '\u000C':
1.562 + continue;
1.563 + case '/':
1.564 + handleAttributeValue();
1.565 + state = MetaScanner.SELF_CLOSING_START_TAG;
1.566 + continue stateloop;
1.567 + case '=':
1.568 + strBufLen = 0;
1.569 + contentTypeIndex = 0;
1.570 + state = MetaScanner.BEFORE_ATTRIBUTE_VALUE;
1.571 + continue stateloop;
1.572 + case '>':
1.573 + handleAttributeValue();
1.574 + if (handleTag()) {
1.575 + break stateloop;
1.576 + }
1.577 + state = MetaScanner.DATA;
1.578 + continue stateloop;
1.579 + case 'c':
1.580 + case 'C':
1.581 + contentIndex = 0;
1.582 + charsetIndex = 0;
1.583 + state = MetaScanner.ATTRIBUTE_NAME;
1.584 + continue stateloop;
1.585 + default:
1.586 + contentIndex = Integer.MAX_VALUE;
1.587 + charsetIndex = Integer.MAX_VALUE;
1.588 + state = MetaScanner.ATTRIBUTE_NAME;
1.589 + continue stateloop;
1.590 + }
1.591 + }
1.592 + // XXX reorder point
1.593 + case MARKUP_DECLARATION_OPEN:
1.594 + markupdeclarationopenloop: for (;;) {
1.595 + c = read();
1.596 + switch (c) {
1.597 + case -1:
1.598 + break stateloop;
1.599 + case '-':
1.600 + state = MetaScanner.MARKUP_DECLARATION_HYPHEN;
1.601 + break markupdeclarationopenloop;
1.602 + // continue stateloop;
1.603 + default:
1.604 + state = MetaScanner.SCAN_UNTIL_GT;
1.605 + reconsume = true;
1.606 + continue stateloop;
1.607 + }
1.608 + }
1.609 + // FALLTHRU DON'T REORDER
1.610 + case MARKUP_DECLARATION_HYPHEN:
1.611 + markupdeclarationhyphenloop: for (;;) {
1.612 + c = read();
1.613 + switch (c) {
1.614 + case -1:
1.615 + break stateloop;
1.616 + case '-':
1.617 + state = MetaScanner.COMMENT_START;
1.618 + break markupdeclarationhyphenloop;
1.619 + // continue stateloop;
1.620 + default:
1.621 + state = MetaScanner.SCAN_UNTIL_GT;
1.622 + reconsume = true;
1.623 + continue stateloop;
1.624 + }
1.625 + }
1.626 + // FALLTHRU DON'T REORDER
1.627 + case COMMENT_START:
1.628 + commentstartloop: for (;;) {
1.629 + c = read();
1.630 + switch (c) {
1.631 + case -1:
1.632 + break stateloop;
1.633 + case '-':
1.634 + state = MetaScanner.COMMENT_START_DASH;
1.635 + continue stateloop;
1.636 + case '>':
1.637 + state = MetaScanner.DATA;
1.638 + continue stateloop;
1.639 + default:
1.640 + state = MetaScanner.COMMENT;
1.641 + break commentstartloop;
1.642 + // continue stateloop;
1.643 + }
1.644 + }
1.645 + // FALLTHRU DON'T REORDER
1.646 + case COMMENT:
1.647 + commentloop: for (;;) {
1.648 + c = read();
1.649 + switch (c) {
1.650 + case -1:
1.651 + break stateloop;
1.652 + case '-':
1.653 + state = MetaScanner.COMMENT_END_DASH;
1.654 + break commentloop;
1.655 + // continue stateloop;
1.656 + default:
1.657 + continue;
1.658 + }
1.659 + }
1.660 + // FALLTHRU DON'T REORDER
1.661 + case COMMENT_END_DASH:
1.662 + commentenddashloop: for (;;) {
1.663 + c = read();
1.664 + switch (c) {
1.665 + case -1:
1.666 + break stateloop;
1.667 + case '-':
1.668 + state = MetaScanner.COMMENT_END;
1.669 + break commentenddashloop;
1.670 + // continue stateloop;
1.671 + default:
1.672 + state = MetaScanner.COMMENT;
1.673 + continue stateloop;
1.674 + }
1.675 + }
1.676 + // FALLTHRU DON'T REORDER
1.677 + case COMMENT_END:
1.678 + for (;;) {
1.679 + c = read();
1.680 + switch (c) {
1.681 + case -1:
1.682 + break stateloop;
1.683 + case '>':
1.684 + state = MetaScanner.DATA;
1.685 + continue stateloop;
1.686 + case '-':
1.687 + continue;
1.688 + default:
1.689 + state = MetaScanner.COMMENT;
1.690 + continue stateloop;
1.691 + }
1.692 + }
1.693 + // XXX reorder point
1.694 + case COMMENT_START_DASH:
1.695 + c = read();
1.696 + switch (c) {
1.697 + case -1:
1.698 + break stateloop;
1.699 + case '-':
1.700 + state = MetaScanner.COMMENT_END;
1.701 + continue stateloop;
1.702 + case '>':
1.703 + state = MetaScanner.DATA;
1.704 + continue stateloop;
1.705 + default:
1.706 + state = MetaScanner.COMMENT;
1.707 + continue stateloop;
1.708 + }
1.709 + // XXX reorder point
1.710 + case ATTRIBUTE_VALUE_SINGLE_QUOTED:
1.711 + for (;;) {
1.712 + if (reconsume) {
1.713 + reconsume = false;
1.714 + } else {
1.715 + c = read();
1.716 + }
1.717 + switch (c) {
1.718 + case -1:
1.719 + break stateloop;
1.720 + case '\'':
1.721 + handleAttributeValue();
1.722 + state = MetaScanner.AFTER_ATTRIBUTE_VALUE_QUOTED;
1.723 + continue stateloop;
1.724 + default:
1.725 + handleCharInAttributeValue(c);
1.726 + continue;
1.727 + }
1.728 + }
1.729 + // XXX reorder point
1.730 + case SCAN_UNTIL_GT:
1.731 + for (;;) {
1.732 + if (reconsume) {
1.733 + reconsume = false;
1.734 + } else {
1.735 + c = read();
1.736 + }
1.737 + switch (c) {
1.738 + case -1:
1.739 + break stateloop;
1.740 + case '>':
1.741 + state = MetaScanner.DATA;
1.742 + continue stateloop;
1.743 + default:
1.744 + continue;
1.745 + }
1.746 + }
1.747 + }
1.748 + }
1.749 + stateSave = state;
1.750 + }
1.751 +
1.752 + private void handleCharInAttributeValue(int c) {
1.753 + if (metaState == A) {
1.754 + if (contentIndex == CONTENT.length || charsetIndex == CHARSET.length) {
1.755 + addToBuffer(c);
1.756 + } else if (httpEquivIndex == HTTP_EQUIV.length) {
1.757 + if (contentTypeIndex < CONTENT_TYPE.length && toAsciiLowerCase(c) == CONTENT_TYPE[contentTypeIndex]) {
1.758 + ++contentTypeIndex;
1.759 + } else {
1.760 + contentTypeIndex = Integer.MAX_VALUE;
1.761 + }
1.762 + }
1.763 + }
1.764 + }
1.765 +
1.766 + @Inline private int toAsciiLowerCase(int c) {
1.767 + if (c >= 'A' && c <= 'Z') {
1.768 + return c + 0x20;
1.769 + }
1.770 + return c;
1.771 + }
1.772 +
1.773 + /**
1.774 + * Adds a character to the accumulation buffer.
1.775 + * @param c the character to add
1.776 + */
1.777 + private void addToBuffer(int c) {
1.778 + if (strBufLen == strBuf.length) {
1.779 + char[] newBuf = new char[strBuf.length + (strBuf.length << 1)];
1.780 + System.arraycopy(strBuf, 0, newBuf, 0, strBuf.length);
1.781 + strBuf = newBuf;
1.782 + }
1.783 + strBuf[strBufLen++] = (char)c;
1.784 + }
1.785 +
1.786 + /**
1.787 + * Attempts to extract a charset name from the accumulation buffer.
1.788 + * @return <code>true</code> if successful
1.789 + * @throws SAXException
1.790 + */
1.791 + private void handleAttributeValue() throws SAXException {
1.792 + if (metaState != A) {
1.793 + return;
1.794 + }
1.795 + if (contentIndex == CONTENT.length && content == null) {
1.796 + content = Portability.newStringFromBuffer(strBuf, 0, strBufLen);
1.797 + return;
1.798 + }
1.799 + if (charsetIndex == CHARSET.length && charset == null) {
1.800 + charset = Portability.newStringFromBuffer(strBuf, 0, strBufLen);
1.801 + return;
1.802 + }
1.803 + if (httpEquivIndex == HTTP_EQUIV.length
1.804 + && httpEquivState == HTTP_EQUIV_NOT_SEEN) {
1.805 + httpEquivState = (contentTypeIndex == CONTENT_TYPE.length) ? HTTP_EQUIV_CONTENT_TYPE
1.806 + : HTTP_EQUIV_OTHER;
1.807 + return;
1.808 + }
1.809 + }
1.810 +
1.811 + private boolean handleTag() throws SAXException {
1.812 + boolean stop = handleTagInner();
1.813 + Portability.releaseString(content);
1.814 + content = null;
1.815 + Portability.releaseString(charset);
1.816 + charset = null;
1.817 + httpEquivState = HTTP_EQUIV_NOT_SEEN;
1.818 + return stop;
1.819 + }
1.820 +
1.821 + private boolean handleTagInner() throws SAXException {
1.822 + if (charset != null && tryCharset(charset)) {
1.823 + return true;
1.824 + }
1.825 + if (content != null && httpEquivState == HTTP_EQUIV_CONTENT_TYPE) {
1.826 + String extract = TreeBuilder.extractCharsetFromContent(content);
1.827 + if (extract == null) {
1.828 + return false;
1.829 + }
1.830 + boolean success = tryCharset(extract);
1.831 + Portability.releaseString(extract);
1.832 + return success;
1.833 + }
1.834 + return false;
1.835 + }
1.836 +
1.837 + /**
1.838 + * Tries to switch to an encoding.
1.839 + *
1.840 + * @param encoding
1.841 + * @return <code>true</code> if successful
1.842 + * @throws SAXException
1.843 + */
1.844 + protected abstract boolean tryCharset(String encoding) throws SAXException;
1.845 +
1.846 +}
