mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-05 18:32:30 +01:00
Use precomputed AST layouts to speed up parsing
Related commit:
- 99ac234d12
This commit is contained in:
Raymond Hill
parent
e7f5273249
commit
fe5fdfe5ed
@ -307,6 +307,235 @@ export const nodeNameFromNodeType = new Map([
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}
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}
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/******************************************************************************/
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// Precomputed AST layouts for most common filters.
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const astTemplates = {
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// ||example.com^
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netHnAnchoredHostnameAscii: {
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flags: AST_FLAG_NET_PATTERN_LEFT_HNANCHOR |
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AST_FLAG_NET_PATTERN_RIGHT_PATHANCHOR,
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type: NODE_TYPE_LINE_BODY,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_PATTERN_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_NET_PATTERN_LEFT_HNANCHOR,
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begFromBeg: 0,
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endFromBeg: 2,
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}, {
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type: NODE_TYPE_NET_PATTERN,
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begFromBeg: 2,
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endFromEnd: -1,
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register: true,
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}, {
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type: NODE_TYPE_NET_PATTERN_PART_SPECIAL,
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begFromEnd: -1,
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endFromEnd: 0,
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}],
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}],
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}],
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},
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// ||example.com^$third-party
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net3pHnAnchoredHostnameAscii: {
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flags: AST_FLAG_NET_PATTERN_LEFT_HNANCHOR |
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AST_FLAG_NET_PATTERN_RIGHT_PATHANCHOR |
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AST_FLAG_HAS_OPTIONS,
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type: NODE_TYPE_LINE_BODY,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_PATTERN_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_NET_PATTERN_LEFT_HNANCHOR,
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begFromBeg: 0,
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endFromBeg: 2,
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}, {
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type: NODE_TYPE_NET_PATTERN,
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begFromBeg: 2,
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endFromEnd: -13,
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register: true,
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}, {
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type: NODE_TYPE_NET_PATTERN_PART_SPECIAL,
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begFromEnd: -13,
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endFromEnd: -12,
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}],
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}, {
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type: NODE_TYPE_NET_OPTIONS_ANCHOR,
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begFromEnd: -12,
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endFromEnd: -11,
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}, {
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type: NODE_TYPE_NET_OPTIONS,
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begFromEnd: -11,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_NET_OPTION_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_OPTION_NAME_3P,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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}],
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}],
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}],
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}],
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},
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// ||example.com/path/to/resource
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netHnAnchoredPlainAscii: {
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flags: AST_FLAG_NET_PATTERN_LEFT_HNANCHOR,
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type: NODE_TYPE_LINE_BODY,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_PATTERN_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_NET_PATTERN_LEFT_HNANCHOR,
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begFromBeg: 0,
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endFromBeg: 2,
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}, {
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type: NODE_TYPE_NET_PATTERN,
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begFromBeg: 2,
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endFromEnd: 0,
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register: true,
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}],
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}],
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}],
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},
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// example.com
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// -resource.
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netPlainAscii: {
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type: NODE_TYPE_LINE_BODY,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_PATTERN_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_NET_PATTERN,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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}],
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}],
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}],
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},
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// 127.0.0.1 example.com
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netHosts1: {
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type: NODE_TYPE_LINE_BODY,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_PATTERN_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_IGNORE,
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begFromBeg: 0,
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endFromBeg: 10,
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}, {
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type: NODE_TYPE_NET_PATTERN,
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begFromBeg: 10,
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endFromEnd: 0,
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register: true,
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}],
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}],
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}],
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},
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// 0.0.0.0 example.com
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netHosts2: {
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type: NODE_TYPE_LINE_BODY,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_NET_PATTERN_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_IGNORE,
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begFromBeg: 0,
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endFromBeg: 8,
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}, {
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type: NODE_TYPE_NET_PATTERN,
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begFromBeg: 8,
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endFromEnd: 0,
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register: true,
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}],
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}],
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}],
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},
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// ##.ads-container
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extPlainGenericSelector: {
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type: NODE_TYPE_LINE_BODY,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_EXT_RAW,
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begFromBeg: 0,
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endFromEnd: 0,
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children: [{
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type: NODE_TYPE_EXT_OPTIONS_ANCHOR,
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begFromBeg: 0,
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endFromBeg: 2,
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register: true,
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}, {
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type: NODE_TYPE_EXT_PATTERN_RAW,
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begFromBeg: 2,
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endFromEnd: 0,
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register: true,
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children: [{
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type: NODE_TYPE_EXT_PATTERN_COSMETIC,
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begFromBeg: 0,
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endFromEnd: 0,
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}],
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}],
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}],
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},
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};
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/******************************************************************************/
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export const removableHTTPHeaders = new Set([
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'location',
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'refresh',
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@ -486,7 +715,11 @@ export class AstFilterParser {
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this.reHnAnchoredPlainAscii = /^\|\|[0-9a-z%&,\-.\/:;=?_]+$/;
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this.reHnAnchoredHostnameAscii = /^\|\|(?:[\da-z][\da-z_-]*\.)*[\da-z_-]*[\da-z]\^$/;
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this.reHnAnchoredHostnameUnicode = /^\|\|(?:[\p{L}\p{N}][\p{L}\p{N}\u{2d}]*\.)*[\p{L}\p{N}\u{2d}]*[\p{L}\p{N}]\^$/u;
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this.reHn3pAnchoredHostnameAscii = /^\|\|(?:[\da-z][\da-z_-]*\.)*[\da-z_-]*[\da-z]\^\$third-party$/;
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this.rePlainAscii = /^[0-9a-z%&\-.\/:;=?_]{2,}$/;
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this.reNetHosts1 = /^127\.0\.0\.1 (?:[\da-z][\da-z_-]*\.)*[\da-z-]*[\da-z]$/;
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this.reNetHosts2 = /^0\.0\.0\.0 (?:[\da-z][\da-z_-]*\.)*[\da-z-]*[\da-z]$/;
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this.rePlainGenericCosmetic = /^##[.#][A-Za-z_][\w-]*$/;
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this.reHostnameAscii = /^(?:[\da-z][\da-z_-]*\.)*[\da-z-]*[\da-z]$/;
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this.rePlainEntity = /^(?:[\da-z][\da-z_-]*\.)+\*$/;
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this.reHostsSink = /^[\w%.:\[\]-]+\s+/;
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@ -528,42 +761,140 @@ export class AstFilterParser {
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this.astType = AST_TYPE_NONE;
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this.astTypeFlavor = AST_TYPE_NONE;
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this.astFlags = 0;
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this.rootNode = this.allocTypedNode(NODE_TYPE_LINE_RAW, 0, raw.length);
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if ( raw.length === 0 ) { return; }
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this.rootNode = this.allocTypedNode(NODE_TYPE_LINE_RAW, 0, this.rawEnd);
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if ( this.rawEnd === 0 ) { return; }
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// Fast-track very common simple filters to skip parsing and validation.
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if ( this.raw.startsWith('||') ) {
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if ( this.reHnAnchoredHostnameAscii.test(this.raw) ) {
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this.linkDown(
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this.rootNode,
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this.parseNetHnAnchoredHostnameAscii(this.rootNode)
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// Fast-track very common simple filters using pre-computed AST layouts
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// to skip parsing and validation.
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const c1st = this.raw.charCodeAt(0);
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const clast = exCharCodeAt(this.raw, -1);
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if ( c1st === 0x7C /* | */ ) {
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if (
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clast === 0x5E /* ^ */ &&
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this.reHnAnchoredHostnameAscii.test(this.raw)
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) {
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// ||example.com^
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this.astType = AST_TYPE_NETWORK;
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this.astTypeFlavor = AST_TYPE_NETWORK_PATTERN_HOSTNAME;
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const node = this.astFromTemplate(this.rootNode,
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astTemplates.netHnAnchoredHostnameAscii
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);
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this.linkDown(this.rootNode, node);
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return;
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}
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if (
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this.raw.endsWith('$third-party') &&
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this.reHn3pAnchoredHostnameAscii.test(this.raw)
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) {
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// ||example.com^$third-party
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this.astType = AST_TYPE_NETWORK;
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this.astTypeFlavor = AST_TYPE_NETWORK_PATTERN_HOSTNAME;
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const node = this.astFromTemplate(this.rootNode,
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astTemplates.net3pHnAnchoredHostnameAscii
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);
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this.linkDown(this.rootNode, node);
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return;
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}
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if ( this.reHnAnchoredPlainAscii.test(this.raw) ) {
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this.linkDown(
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this.rootNode,
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this.parseNetHnAnchoredPlainAscii(this.rootNode)
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// ||example.com/path/to/resource
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this.astType = AST_TYPE_NETWORK;
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this.astTypeFlavor = AST_TYPE_NETWORK_PATTERN_PLAIN;
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const node = this.astFromTemplate(this.rootNode,
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astTemplates.netHnAnchoredPlainAscii
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);
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this.linkDown(this.rootNode, node);
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return;
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}
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}
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if (
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(this.rePlainAscii.test(this.raw)) &&
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(this.raw.startsWith('/') && this.raw.endsWith('/')) === false
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} else if ( c1st === 0x23 /* # */ ) {
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if ( this.rePlainGenericCosmetic.test(this.raw) ) {
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// ##.ads-container
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this.astType = AST_TYPE_EXTENDED;
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this.astTypeFlavor = AST_TYPE_EXTENDED_COSMETIC;
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const node = this.astFromTemplate(this.rootNode,
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astTemplates.extPlainGenericSelector
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);
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this.linkDown(this.rootNode, node);
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this.result.exception = false;
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this.result.raw = this.raw.slice(2);
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this.result.compiled = this.raw.slice(2);
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return;
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}
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} else if ( c1st === 0x31 /* 1 */ ) {
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if ( this.reNetHosts1.test(this.raw) ) {
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// 127.0.0.1 example.com
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this.astType = AST_TYPE_NETWORK;
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this.astTypeFlavor = AST_TYPE_NETWORK_PATTERN_HOSTNAME;
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const node = this.astFromTemplate(this.rootNode,
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astTemplates.netHosts1
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);
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this.linkDown(this.rootNode, node);
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return;
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}
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} else if ( c1st === 0x30 /* 0 */ ) {
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if ( this.reNetHosts2.test(this.raw) ) {
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// 0.0.0.0 example.com
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this.astType = AST_TYPE_NETWORK;
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this.astTypeFlavor = AST_TYPE_NETWORK_PATTERN_HOSTNAME;
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const node = this.astFromTemplate(this.rootNode,
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astTemplates.netHosts2
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);
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this.linkDown(this.rootNode, node);
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return;
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}
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} else if (
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(c1st !== 0x2F /* / */ || clast !== 0x2F /* / */) &&
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(this.rePlainAscii.test(this.raw))
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) {
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this.linkDown(
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this.rootNode,
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this.parseNetPlainAscii(this.rootNode)
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// example.com
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// -resource.
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this.astType = AST_TYPE_NETWORK;
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this.astTypeFlavor = this.reHostnameAscii.test(this.raw)
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? AST_TYPE_NETWORK_PATTERN_HOSTNAME
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: AST_TYPE_NETWORK_PATTERN_PLAIN;
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const node = this.astFromTemplate(this.rootNode,
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astTemplates.netPlainAscii
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);
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this.linkDown(this.rootNode, node);
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return;
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}
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// Slow path with full parsing and validation.
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// All else: full parsing and validation.
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this.hasWhitespace = this.reHasWhitespaceChar.test(raw);
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this.linkDown(this.rootNode, this.parseRaw(this.rootNode));
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}
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astFromTemplate(parent, template) {
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const parentBeg = this.nodes[parent+NODE_BEG_INDEX];
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const parentEnd = this.nodes[parent+NODE_END_INDEX];
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const beg = template.begFromBeg !== undefined
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? parentBeg + template.begFromBeg
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: parentEnd + template.begFromEnd;
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const end = template.endFromEnd !== undefined
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? parentEnd + template.endFromEnd
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: parentBeg + template.endFromBeg;
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const node = this.allocTypedNode(template.type, beg, end);
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if ( template.register ) {
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this.addNodeToRegister(template.type, node);
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}
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if ( template.flags ) {
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this.addFlags(template.flags);
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}
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if ( template.nodeFlags ) {
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this.addNodeFlags(node, template.nodeFlags);
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}
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const children = template.children;
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if ( children === undefined ) { return node; }
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const head = this.astFromTemplate(node, children[0]);
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this.linkDown(node, head);
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const n = children.length;
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if ( n === 1 ) { return node; }
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let prev = head;
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for ( let i = 1; i < n; i++ ) {
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prev = this.linkRight(prev, this.astFromTemplate(node, children[i]));
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}
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return node;
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}
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getType() {
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return this.astType;
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}
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@ -799,130 +1130,6 @@ export class AstFilterParser {
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return this.throwHeadNode(head);
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}
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parseNetHnAnchoredHostnameAscii(parent) {
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this.astType = AST_TYPE_NETWORK;
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this.astTypeFlavor = AST_TYPE_NETWORK_PATTERN_HOSTNAME;
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const parentBeg = this.nodes[parent+NODE_BEG_INDEX];
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const parentEnd = this.nodes[parent+NODE_END_INDEX];
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const lineNode = this.allocTypedNode(
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NODE_TYPE_LINE_BODY,
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parentBeg,
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parentEnd
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);
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const netRawNode = this.allocTypedNode(
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NODE_TYPE_NET_RAW,
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parentBeg,
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parentEnd
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);
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this.linkDown(lineNode, netRawNode);
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const patternRawNode = this.allocTypedNode(
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NODE_TYPE_NET_PATTERN_RAW,
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parentBeg,
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parentEnd
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);
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this.linkDown(netRawNode, patternRawNode);
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this.addNodeToRegister(NODE_TYPE_NET_PATTERN_RAW, patternRawNode);
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this.addFlags(
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AST_FLAG_NET_PATTERN_LEFT_HNANCHOR |
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AST_FLAG_NET_PATTERN_RIGHT_PATHANCHOR
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);
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const head = this.allocTypedNode(
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NODE_TYPE_NET_PATTERN_LEFT_HNANCHOR,
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parentBeg,
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parentBeg + 2
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);
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let next = this.allocTypedNode(
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NODE_TYPE_NET_PATTERN,
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parentBeg + 2,
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parentEnd - 1
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);
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this.addNodeToRegister(NODE_TYPE_NET_PATTERN, next);
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let prev = this.linkRight(head, next);
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next = this.allocTypedNode(
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NODE_TYPE_NET_PATTERN_PART_SPECIAL,
|
||||
parentEnd - 1,
|
||||
parentEnd
|
||||
);
|
||||
this.linkRight(prev, next);
|
||||
this.linkDown(patternRawNode, head);
|
||||
return lineNode;
|
||||
}
|
||||
|
||||
parseNetHnAnchoredPlainAscii(parent) {
|
||||
this.astType = AST_TYPE_NETWORK;
|
||||
this.astTypeFlavor = AST_TYPE_NETWORK_PATTERN_PLAIN;
|
||||
const parentBeg = this.nodes[parent+NODE_BEG_INDEX];
|
||||
const parentEnd = this.nodes[parent+NODE_END_INDEX];
|
||||
const lineNode = this.allocTypedNode(
|
||||
NODE_TYPE_LINE_BODY,
|
||||
parentBeg,
|
||||
parentEnd
|
||||
);
|
||||
const netRawNode = this.allocTypedNode(
|
||||
NODE_TYPE_NET_RAW,
|
||||
parentBeg,
|
||||
parentEnd
|
||||
);
|
||||
this.linkDown(lineNode, netRawNode);
|
||||
const patternRawNode = this.allocTypedNode(
|
||||
NODE_TYPE_NET_PATTERN_RAW,
|
||||
parentBeg,
|
||||
parentEnd
|
||||
);
|
||||
this.linkDown(netRawNode, patternRawNode);
|
||||
this.addNodeToRegister(NODE_TYPE_NET_PATTERN_RAW, patternRawNode);
|
||||
this.addFlags(AST_FLAG_NET_PATTERN_LEFT_HNANCHOR);
|
||||
const head = this.allocTypedNode(
|
||||
NODE_TYPE_NET_PATTERN_LEFT_HNANCHOR,
|
||||
parentBeg,
|
||||
parentBeg + 2
|
||||
);
|
||||
let next = this.allocTypedNode(
|
||||
NODE_TYPE_NET_PATTERN,
|
||||
parentBeg + 2,
|
||||
parentEnd
|
||||
);
|
||||
this.addNodeToRegister(NODE_TYPE_NET_PATTERN, next);
|
||||
this.linkRight(head, next);
|
||||
this.linkDown(patternRawNode, head);
|
||||
return lineNode;
|
||||
}
|
||||
|
||||
parseNetPlainAscii(parent) {
|
||||
this.astType = AST_TYPE_NETWORK;
|
||||
this.astTypeFlavor = this.reHostnameAscii.test(this.raw)
|
||||
? AST_TYPE_NETWORK_PATTERN_HOSTNAME
|
||||
: AST_TYPE_NETWORK_PATTERN_PLAIN;
|
||||
const parentBeg = this.nodes[parent+NODE_BEG_INDEX];
|
||||
const parentEnd = this.nodes[parent+NODE_END_INDEX];
|
||||
const lineNode = this.allocTypedNode(
|
||||
NODE_TYPE_LINE_BODY,
|
||||
parentBeg,
|
||||
parentEnd
|
||||
);
|
||||
const netRawNode = this.allocTypedNode(
|
||||
NODE_TYPE_NET_RAW,
|
||||
parentBeg,
|
||||
parentEnd
|
||||
);
|
||||
this.linkDown(lineNode, netRawNode);
|
||||
const patternRawNode = this.allocTypedNode(
|
||||
NODE_TYPE_NET_PATTERN_RAW,
|
||||
parentBeg,
|
||||
parentEnd
|
||||
);
|
||||
this.linkDown(netRawNode, patternRawNode);
|
||||
this.addNodeToRegister(NODE_TYPE_NET_PATTERN_RAW, patternRawNode);
|
||||
const head = this.allocTypedNode(
|
||||
NODE_TYPE_NET_PATTERN,
|
||||
parentBeg,
|
||||
parentEnd
|
||||
);
|
||||
this.addNodeToRegister(NODE_TYPE_NET_PATTERN, head);
|
||||
this.linkDown(patternRawNode, head);
|
||||
return lineNode;
|
||||
}
|
||||
|
||||
validateNet() {
|
||||
const isException = this.isException();
|
||||
let bad = false, realBad = false;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user