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+/*************************************************************************/
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+/* regex.cpp */
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+/*************************************************************************/
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+/* This file is part of: */
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+/* GODOT ENGINE */
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+/* http://www.godotengine.org */
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+/*************************************************************************/
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+/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
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+/* */
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+/* Permission is hereby granted, free of charge, to any person obtaining */
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+/* a copy of this software and associated documentation files (the */
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+/* "Software"), to deal in the Software without restriction, including */
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+/* without limitation the rights to use, copy, modify, merge, publish, */
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+/* distribute, sublicense, and/or sell copies of the Software, and to */
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+/* permit persons to whom the Software is furnished to do so, subject to */
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+/* the following conditions: */
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+/* */
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+/* The above copyright notice and this permission notice shall be */
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+/* included in all copies or substantial portions of the Software. */
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+/* */
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+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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+/*************************************************************************/
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+
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+#include "regex.h"
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+#include <wctype.h>
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+#include <wchar.h>
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+
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+static int RegEx_hex2int(const CharType c)
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+{
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+ if ('0' <= c && c <= '9')
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+ return int(c - '0');
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+ else if ('a' <= c && c <= 'f')
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+ return int(c - 'a') + 10;
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+ else if ('A' <= c && c <= 'F')
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+ return int(c - 'A') + 10;
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+ return -1;
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+}
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+
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+struct RegExSearch {
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+
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+ Ref<RegExMatch> match;
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+ const CharType* str;
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+ int end;
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+ int eof;
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+
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+ // For standard quantifier behaviour, test_parent is used to check the
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+ // rest of the pattern. If the pattern matches, to prevent the parent
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+ // from testing again, the complete flag is used as a shortcut out.
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+ bool complete;
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+
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+ // With lookahead, the position needs to rewind to its starting position
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+ // when test_parent is used. Due to functional programming, this state
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+ // has to be kept as a parameter.
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+ Vector<int> lookahead_pos;
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+
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+ CharType at(int p_pos) {
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+ return str[p_pos];
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+ }
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+
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+ RegExSearch(Ref<RegExMatch>& p_match, int p_end, int p_lookahead) : match(p_match) {
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+
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+ str = p_match->string.c_str();
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+ end = p_end;
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+ eof = p_match->string.length();
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+ complete = false;
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+ lookahead_pos.resize(p_lookahead);
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+ }
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+
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+};
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+
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+struct RegExNode {
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+
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+ RegExNode* next;
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+ RegExNode* previous;
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+ RegExNode* parent;
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+ bool quantifiable;
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+ int length;
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+
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+ RegExNode() {
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+
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+ next = NULL;
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+ previous = NULL;
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+ parent = NULL;
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+ quantifiable = false;
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+ length = -1;
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+ }
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+
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+ virtual ~RegExNode() {
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+
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+ if (next)
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+ memdelete(next);
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ return next ? next->test(s, pos) : -1;
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+ }
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+
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+ virtual int test_parent(RegExSearch& s, int pos) const {
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+
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+ if (next)
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+ pos = next->test(s, pos);
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+
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+ if (pos >= 0) {
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+ s.complete = true;
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+ if (parent)
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+ pos = parent->test_parent(s, pos);
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+ }
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+
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+ if (pos < 0)
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+ s.complete = false;
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+
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+ return pos;
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+ }
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+
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+ void increment_length(int amount, bool subtract = false) {
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+
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+ if (amount >= 0 && length >= 0) {
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+ if (!subtract)
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+ length += amount;
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+ else
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+ length -= amount;
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+ } else {
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+ length = -1;
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+ }
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+
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+ if (parent)
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+ parent->increment_length(amount, subtract);
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+
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+ }
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+
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+};
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+
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+struct RegExNodeChar : public RegExNode {
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+
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+ CharType ch;
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+
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+ RegExNodeChar(CharType p_char) {
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+
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+ length = 1;
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+ quantifiable = true;
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+ ch = p_char;
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ if (s.end <= pos || 0 > pos || s.at(pos) != ch)
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+ return -1;
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+
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+ return next ? next->test(s, pos + 1) : pos + 1;
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+ }
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+
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+ static CharType parse_escape(const CharType*& c) {
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+
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+ int point = 0;
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+ switch (c[1]) {
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+ case 'x':
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+ for (int i = 2; i <= 3; ++i) {
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+ int res = RegEx_hex2int(c[i]);
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+ if (res == -1)
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+ return '\0';
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+ point = (point << 4) + res;
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+ }
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+ c = &c[3];
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+ return CharType(point);
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+ case 'u':
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+ for (int i = 2; i <= 5; ++i) {
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+ int res = RegEx_hex2int(c[i]);
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+ if (res == -1)
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+ return '\0';
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+ point = (point << 4) + res;
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+ }
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+ c = &c[5];
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+ return CharType(point);
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+ case '0': ++c; return '\0';
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+ case 'a': ++c; return '\a';
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+ case 'e': ++c; return '\e';
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+ case 'f': ++c; return '\f';
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+ case 'n': ++c; return '\n';
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+ case 'r': ++c; return '\r';
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+ case 't': ++c; return '\t';
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+ case 'v': ++c; return '\v';
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+ case 'b': ++c; return '\b';
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+ default: break;
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+ }
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+ return (++c)[0];
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+ }
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+};
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+
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+struct RegExNodeRange : public RegExNode {
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+
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+ CharType start;
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+ CharType end;
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+
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+ RegExNodeRange(CharType p_start, CharType p_end) {
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+
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+ length = 1;
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+ quantifiable = true;
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+ start = p_start;
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+ end = p_end;
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ if (s.end <= pos || 0 > pos)
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+ return -1;
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+
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+ CharType c = s.at(pos);
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+ if (c < start || end < c)
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+ return -1;
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+
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+ return next ? next->test(s, pos + 1) : pos + 1;
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+ }
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+};
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+
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+struct RegExNodeShorthand : public RegExNode {
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+
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+ CharType repr;
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+
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+ RegExNodeShorthand(CharType p_repr) {
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+
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+ length = 1;
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+ quantifiable = true;
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+ repr = p_repr;
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ if (s.end <= pos || 0 > pos)
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+ return -1;
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+
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+ bool found = false;
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+ bool invert = false;
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+ CharType c = s.at(pos);
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+ switch (repr) {
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+ case '.':
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+ found = true;
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+ break;
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+ case 'W':
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+ invert = true;
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+ case 'w':
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+ found = (c == '_' || iswalnum(c) != 0);
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+ break;
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+ case 'D':
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+ invert = true;
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+ case 'd':
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+ found = ('0' <= c && c <= '9');
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+ break;
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+ case 'S':
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+ invert = true;
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+ case 's':
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+ found = (iswspace(c) != 0);
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+ break;
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+ default:
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+ break;
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+ }
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+
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+ if (found == invert)
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+ return -1;
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+
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+ return next ? next->test(s, pos + 1) : pos + 1;
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+ }
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+};
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+
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+struct RegExNodeClass : public RegExNode {
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+
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+ enum Type {
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+ Type_none,
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+ Type_alnum,
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+ Type_alpha,
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+ Type_ascii,
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+ Type_blank,
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+ Type_cntrl,
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+ Type_digit,
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+ Type_graph,
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+ Type_lower,
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+ Type_print,
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+ Type_punct,
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+ Type_space,
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+ Type_upper,
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+ Type_xdigit,
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+ Type_word
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+ };
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+
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+ Type type;
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+
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+ bool test_class(CharType c) const {
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+
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+ static Vector<CharType> REGEX_NODE_SPACE = String(" \t\r\n\f");
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+ static Vector<CharType> REGEX_NODE_PUNCT = String("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~");
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+
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+ switch (type) {
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+ case Type_alnum:
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+ if ('0' <= c && c <= '9') return true;
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+ if ('a' <= c && c <= 'z') return true;
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+ if ('A' <= c && c <= 'Z') return true;
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+ return false;
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+ case Type_alpha:
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+ if ('a' <= c && c <= 'z') return true;
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+ if ('A' <= c && c <= 'Z') return true;
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+ return false;
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+ case Type_ascii:
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+ return (0x00 <= c && c <= 0x7F);
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+ case Type_blank:
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+ return (c == ' ' || c == '\t');
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+ case Type_cntrl:
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+ return ((0x00 <= c && c <= 0x1F) || c == 0x7F);
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+ case Type_digit:
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+ return ('0' <= c && c <= '9');
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+ case Type_graph:
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+ return (0x20 < c && c < 0x7F);
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+ case Type_lower:
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+ return ('a' <= c && c <= 'z');
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+ case Type_print:
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+ return (0x1F < c && c < 0x1F);
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+ case Type_punct:
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+ return (REGEX_NODE_PUNCT.find(c) >= 0);
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+ case Type_space:
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+ return (REGEX_NODE_SPACE.find(c) >= 0);
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+ case Type_upper:
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+ return ('A' <= c && c <= 'Z');
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+ case Type_xdigit:
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+ if ('0' <= c && c <= '9') return true;
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+ if ('a' <= c && c <= 'f') return true;
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+ if ('A' <= c && c <= 'F') return true;
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+ return false;
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+ case Type_word:
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+ if ('0' <= c && c <= '9') return true;
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+ if ('a' <= c && c <= 'z') return true;
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+ if ('A' <= c && c <= 'Z') return true;
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+ return (c == '_');
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+ default:
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+ return false;
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+ }
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+ return false;
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+ }
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+
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+ RegExNodeClass(Type p_type) {
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+
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+ length = 1;
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+ quantifiable = true;
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+ type = p_type;
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ if (s.end <= pos || 0 > pos)
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+ return -1;
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+
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+ if (!test_class(s.at(pos)))
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+ return -1;
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+
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+ return next ? next->test(s, pos + 1) : pos + 1;
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+ }
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+
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+#define REGEX_CMP_CLASS(POS, NAME) if (cmp_class(POS, #NAME)) return Type_ ## NAME
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+
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+ static Type parse_type(const CharType*& p_pos) {
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+
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+ REGEX_CMP_CLASS(p_pos, alnum);
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+ REGEX_CMP_CLASS(p_pos, alpha);
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+ REGEX_CMP_CLASS(p_pos, ascii);
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+ REGEX_CMP_CLASS(p_pos, blank);
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+ REGEX_CMP_CLASS(p_pos, cntrl);
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+ REGEX_CMP_CLASS(p_pos, digit);
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+ REGEX_CMP_CLASS(p_pos, graph);
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+ REGEX_CMP_CLASS(p_pos, lower);
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+ REGEX_CMP_CLASS(p_pos, print);
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+ REGEX_CMP_CLASS(p_pos, punct);
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+ REGEX_CMP_CLASS(p_pos, space);
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+ REGEX_CMP_CLASS(p_pos, upper);
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+ REGEX_CMP_CLASS(p_pos, xdigit);
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+ REGEX_CMP_CLASS(p_pos, word);
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+ return Type_none;
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+ }
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+
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+ static bool cmp_class(const CharType*& p_pos, const char* p_text) {
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+
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+ unsigned int i = 0;
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+ for (i = 0; p_text[i] != '\0'; ++i)
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+ if (p_pos[i] != p_text[i])
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+ return false;
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+
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+ if (p_pos[i++] != ':' || p_pos[i] != ']')
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+ return false;
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+
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+ p_pos = &p_pos[i];
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+ return true;
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+ }
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+};
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+
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+struct RegExNodeAnchorStart : public RegExNode {
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+
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+ RegExNodeAnchorStart() {
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+
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+ length = 0;
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ if (pos != 0)
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+ return -1;
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+
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+ return next ? next->test(s, pos) : pos;
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+ }
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+};
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+
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+struct RegExNodeAnchorEnd : public RegExNode {
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+
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+ RegExNodeAnchorEnd() {
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+
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+ length = 0;
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ if (pos != s.eof)
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+ return -1;
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+
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+ return next ? next->test(s, pos) : pos;
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+ }
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+};
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+
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+struct RegExNodeWordBoundary : public RegExNode {
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+
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+ bool inverse;
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+
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+ RegExNodeWordBoundary(bool p_inverse) {
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+
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+ length = 0;
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+ inverse = p_inverse;
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+ }
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+
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+ virtual int test(RegExSearch& s, int pos) const {
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+
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+ bool left = false;
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|
|
+ bool right = false;
|
|
|
+
|
|
|
+ if (pos != 0) {
|
|
|
+ CharType c = s.at(pos - 1);
|
|
|
+ if (c == '_' || iswalnum(c))
|
|
|
+ left = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (pos != s.eof) {
|
|
|
+ CharType c = s.at(pos);
|
|
|
+ if (c == '_' || iswalnum(c))
|
|
|
+ right = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ if ((left == right) != inverse)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ return next ? next->test(s, pos) : pos;
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+struct RegExNodeQuantifier : public RegExNode {
|
|
|
+
|
|
|
+ int min;
|
|
|
+ int max;
|
|
|
+ bool greedy;
|
|
|
+ RegExNode* child;
|
|
|
+
|
|
|
+ RegExNodeQuantifier(int p_min, int p_max) {
|
|
|
+
|
|
|
+ min = p_min;
|
|
|
+ max = p_max;
|
|
|
+ greedy = true;
|
|
|
+ child = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ ~RegExNodeQuantifier() {
|
|
|
+
|
|
|
+ if (child)
|
|
|
+ memdelete(child);
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ return test_step(s, pos, 0, pos);
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test_parent(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ s.complete = false;
|
|
|
+ return pos;
|
|
|
+ }
|
|
|
+
|
|
|
+ int test_step(RegExSearch& s, int pos, int level, int start) const {
|
|
|
+
|
|
|
+ if (pos > s.end)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ if (!greedy && level > min) {
|
|
|
+ int res = next ? next->test(s, pos) : pos;
|
|
|
+ if (s.complete)
|
|
|
+ return res;
|
|
|
+
|
|
|
+ if (res >= 0 && parent->test_parent(s, res) >= 0)
|
|
|
+ return res;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (max >= 0 && level > max)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ int res = pos;
|
|
|
+ if (level >= 1) {
|
|
|
+ if (level > min + 1 && pos == start)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ res = child->test(s, pos);
|
|
|
+ if (s.complete)
|
|
|
+ return res;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (res >= 0) {
|
|
|
+
|
|
|
+ int res_step = test_step(s, res, level + 1, start);
|
|
|
+ if (res_step >= 0)
|
|
|
+ return res_step;
|
|
|
+
|
|
|
+ if (greedy && level >= min) {
|
|
|
+ if (next)
|
|
|
+ res = next->test(s, res);
|
|
|
+ if (s.complete)
|
|
|
+ return res;
|
|
|
+
|
|
|
+ if (res >= 0 && parent->test_parent(s, res) >= 0)
|
|
|
+ return res;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+struct RegExNodeBackReference : public RegExNode {
|
|
|
+
|
|
|
+ int id;
|
|
|
+
|
|
|
+ RegExNodeBackReference(int p_id) {
|
|
|
+
|
|
|
+ length = -1;
|
|
|
+ quantifiable = true;
|
|
|
+ id = p_id;
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ RegExMatch::Group& ref = s.match->captures[id];
|
|
|
+ for (int i = 0; i < ref.length; ++i) {
|
|
|
+
|
|
|
+ if (pos + i >= s.end)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ if (s.at(ref.start + i) != s.at(pos + i))
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ return next ? next->test(s, pos + ref.length) : pos + ref.length;
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+
|
|
|
+struct RegExNodeGroup : public RegExNode {
|
|
|
+
|
|
|
+ bool inverse;
|
|
|
+ bool reset_pos;
|
|
|
+ Vector<RegExNode*> childset;
|
|
|
+ RegExNode* back;
|
|
|
+
|
|
|
+ RegExNodeGroup() {
|
|
|
+
|
|
|
+ length = 0;
|
|
|
+ quantifiable = true;
|
|
|
+ inverse = false;
|
|
|
+ reset_pos = false;
|
|
|
+ back = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual ~RegExNodeGroup() {
|
|
|
+
|
|
|
+ for (int i = 0; i < childset.size(); ++i)
|
|
|
+ memdelete(childset[i]);
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ for (int i = 0; i < childset.size(); ++i) {
|
|
|
+
|
|
|
+ s.complete = false;
|
|
|
+
|
|
|
+ int res = childset[i]->test(s, pos);
|
|
|
+
|
|
|
+ if (s.complete)
|
|
|
+ return res;
|
|
|
+
|
|
|
+ if (inverse) {
|
|
|
+ if (res < 0)
|
|
|
+ res = pos + 1;
|
|
|
+ else
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ if (i + 1 < childset.size())
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (res >= 0) {
|
|
|
+ if (reset_pos)
|
|
|
+ res = pos;
|
|
|
+ return next ? next->test(s, res) : res;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ void add_child(RegExNode* node) {
|
|
|
+
|
|
|
+ node->parent = this;
|
|
|
+ node->previous = back;
|
|
|
+
|
|
|
+ if (back)
|
|
|
+ back->next = node;
|
|
|
+ else
|
|
|
+ childset.push_back(node);
|
|
|
+
|
|
|
+ increment_length(node->length);
|
|
|
+
|
|
|
+ back = node;
|
|
|
+ }
|
|
|
+
|
|
|
+ void add_childset() {
|
|
|
+
|
|
|
+ if (childset.size() > 0)
|
|
|
+ length = -1;
|
|
|
+ back = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ RegExNode* swap_back(RegExNode* node) {
|
|
|
+
|
|
|
+ RegExNode* old = back;
|
|
|
+
|
|
|
+ if (old) {
|
|
|
+ if (!old->previous)
|
|
|
+ childset.remove(childset.size() - 1);
|
|
|
+ back = old->previous;
|
|
|
+ increment_length(old->length, true);
|
|
|
+ }
|
|
|
+
|
|
|
+ add_child(node);
|
|
|
+
|
|
|
+ return old;
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+struct RegExNodeCapturing : public RegExNodeGroup {
|
|
|
+
|
|
|
+ int id;
|
|
|
+
|
|
|
+ RegExNodeCapturing(int p_id = 0) {
|
|
|
+
|
|
|
+ id = p_id;
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ RegExMatch::Group& ref = s.match->captures[id];
|
|
|
+ int old_start = ref.start;
|
|
|
+ ref.start = pos;
|
|
|
+
|
|
|
+ int res = RegExNodeGroup::test(s, pos);
|
|
|
+
|
|
|
+ if (res >= 0) {
|
|
|
+ if (!s.complete)
|
|
|
+ ref.length = res - pos;
|
|
|
+ } else {
|
|
|
+ ref.start = old_start;
|
|
|
+ }
|
|
|
+
|
|
|
+ return res;
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test_parent(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ RegExMatch::Group& ref = s.match->captures[id];
|
|
|
+ ref.length = pos - ref.start;
|
|
|
+ return RegExNode::test_parent(s, pos);
|
|
|
+ }
|
|
|
+
|
|
|
+ static Variant parse_name(const CharType*& c, bool p_allow_numeric) {
|
|
|
+
|
|
|
+ if (c[1] == '0') {
|
|
|
+ return -1;
|
|
|
+ } else if ('1' <= c[1] && c[1] <= '9') {
|
|
|
+ if (!p_allow_numeric)
|
|
|
+ return -1;
|
|
|
+ int res = (++c)[0] - '0';
|
|
|
+ while ('0' <= c[1] && c[1] <= '9')
|
|
|
+ res = res * 10 + int((++c)[0] - '0');
|
|
|
+ if ((++c)[0] != '>')
|
|
|
+ return -1;
|
|
|
+ return res;
|
|
|
+ } else if (iswalnum(c[1])) {
|
|
|
+ String res(++c, 1);
|
|
|
+ while (iswalnum(c[1]))
|
|
|
+ res += String(++c, 1);
|
|
|
+ if ((++c)[0] != '>')
|
|
|
+ return -1;
|
|
|
+ return res;
|
|
|
+ }
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+struct RegExNodeLookAhead : public RegExNodeGroup {
|
|
|
+
|
|
|
+ int id;
|
|
|
+
|
|
|
+ RegExNodeLookAhead(bool p_inverse, int p_id = 0) {
|
|
|
+
|
|
|
+ quantifiable = false;
|
|
|
+ inverse = p_inverse;
|
|
|
+ reset_pos = true;
|
|
|
+ id = p_id;
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ s.lookahead_pos[id] = pos;
|
|
|
+ return RegExNodeGroup::test(s, pos);
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test_parent(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ return RegExNode::test_parent(s, s.lookahead_pos[id]);
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+struct RegExNodeLookBehind : public RegExNodeGroup {
|
|
|
+
|
|
|
+ RegExNodeLookBehind(bool p_inverse, int p_id = 0) {
|
|
|
+
|
|
|
+ quantifiable = false;
|
|
|
+ inverse = p_inverse;
|
|
|
+ reset_pos = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ if (pos < length)
|
|
|
+ return -1;
|
|
|
+ return RegExNodeGroup::test(s, pos - length);
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+struct RegExNodeBracket : public RegExNode {
|
|
|
+
|
|
|
+ bool inverse;
|
|
|
+ Vector<RegExNode*> children;
|
|
|
+
|
|
|
+ RegExNodeBracket() {
|
|
|
+
|
|
|
+ length = 1;
|
|
|
+ quantifiable = true;
|
|
|
+ inverse = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual ~RegExNodeBracket() {
|
|
|
+
|
|
|
+ for (int i = 0; i < children.size(); ++i)
|
|
|
+ memdelete(children[i]);
|
|
|
+ }
|
|
|
+
|
|
|
+ virtual int test(RegExSearch& s, int pos) const {
|
|
|
+
|
|
|
+ for (int i = 0; i < children.size(); ++i) {
|
|
|
+
|
|
|
+ int res = children[i]->test(s, pos);
|
|
|
+
|
|
|
+ if (inverse) {
|
|
|
+ if (res < 0)
|
|
|
+ res = pos + 1;
|
|
|
+ else
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ if (i + 1 < children.size())
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (res >= 0)
|
|
|
+ return next ? next->test(s, res) : res;
|
|
|
+ }
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ void add_child(RegExNode* node) {
|
|
|
+
|
|
|
+ node->parent = this;
|
|
|
+ children.push_back(node);
|
|
|
+ }
|
|
|
+
|
|
|
+ void pop_back() {
|
|
|
+
|
|
|
+ memdelete(children[children.size() - 1]);
|
|
|
+ children.remove(children.size() - 1);
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+#define REGEX_EXPAND_FAIL(MSG)\
|
|
|
+{\
|
|
|
+ ERR_PRINT(MSG);\
|
|
|
+ return String();\
|
|
|
+}
|
|
|
+
|
|
|
+String RegExMatch::expand(const String& p_template) const {
|
|
|
+
|
|
|
+ String res;
|
|
|
+ for (const CharType* c = p_template.c_str(); *c != '\0'; ++c) {
|
|
|
+ if (c[0] == '\\') {
|
|
|
+ if (('1' <= c[1] && c[1] <= '9') || (c[1] == 'g' && c[2] == '{')) {
|
|
|
+
|
|
|
+ int ref = 0;
|
|
|
+ bool unclosed = false;
|
|
|
+
|
|
|
+ if (c[1] == 'g') {
|
|
|
+ unclosed = true;
|
|
|
+ c = &c[2];
|
|
|
+ }
|
|
|
+
|
|
|
+ while ('0' <= c[1] && c[1] <= '9') {
|
|
|
+ ref = ref * 10 + int(c[1] - '0');
|
|
|
+ ++c;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (unclosed) {
|
|
|
+ if (c[1] != '}')
|
|
|
+ REGEX_EXPAND_FAIL("unclosed backreference '{'");
|
|
|
+ ++c;
|
|
|
+ }
|
|
|
+
|
|
|
+ res += get_string(ref);
|
|
|
+
|
|
|
+ } else if (c[1] =='g' && c[2] == '<') {
|
|
|
+
|
|
|
+ const CharType* d = &c[2];
|
|
|
+
|
|
|
+ Variant name = RegExNodeCapturing::parse_name(d, true);
|
|
|
+ if (name == Variant(-1))
|
|
|
+ REGEX_EXPAND_FAIL("unrecognised character for group name");
|
|
|
+
|
|
|
+ c = d;
|
|
|
+
|
|
|
+ res += get_string(name);
|
|
|
+
|
|
|
+ } else {
|
|
|
+
|
|
|
+ const CharType* d = c;
|
|
|
+ CharType ch = RegExNodeChar::parse_escape(d);
|
|
|
+ if (c == d)
|
|
|
+ REGEX_EXPAND_FAIL("invalid escape token");
|
|
|
+ res += String(&ch, 1);
|
|
|
+ c = d;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ res += String(c, 1);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return res;
|
|
|
+}
|
|
|
+
|
|
|
+int RegExMatch::get_group_count() const {
|
|
|
+
|
|
|
+ int count = 0;
|
|
|
+ for (int i = 1; i < captures.size(); ++i)
|
|
|
+ if (captures[i].name.get_type() == Variant::INT)
|
|
|
+ ++count;
|
|
|
+ return count;
|
|
|
+}
|
|
|
+
|
|
|
+Array RegExMatch::get_group_array() const {
|
|
|
+
|
|
|
+ Array res;
|
|
|
+ for (int i = 1; i < captures.size(); ++i) {
|
|
|
+ const RegExMatch::Group& capture = captures[i];
|
|
|
+ if (capture.name.get_type() != Variant::INT)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (capture.start >= 0)
|
|
|
+ res.push_back(string.substr(capture.start, capture.length));
|
|
|
+ else
|
|
|
+ res.push_back(String());
|
|
|
+ }
|
|
|
+ return res;
|
|
|
+}
|
|
|
+
|
|
|
+Array RegExMatch::get_names() const {
|
|
|
+
|
|
|
+ Array res;
|
|
|
+ for (int i = 1; i < captures.size(); ++i)
|
|
|
+ if (captures[i].name.get_type() == Variant::STRING)
|
|
|
+ res.push_back(captures[i].name);
|
|
|
+ return res;
|
|
|
+}
|
|
|
+
|
|
|
+Dictionary RegExMatch::get_name_dict() const {
|
|
|
+
|
|
|
+ Dictionary res;
|
|
|
+ for (int i = 1; i < captures.size(); ++i) {
|
|
|
+ const RegExMatch::Group& capture = captures[i];
|
|
|
+ if (capture.name.get_type() != Variant::STRING)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (capture.start >= 0)
|
|
|
+ res[capture.name] = string.substr(capture.start, capture.length);
|
|
|
+ else
|
|
|
+ res[capture.name] = String();
|
|
|
+ }
|
|
|
+ return res;
|
|
|
+}
|
|
|
+
|
|
|
+String RegExMatch::get_string(const Variant& p_name) const {
|
|
|
+
|
|
|
+ for (int i = 0; i < captures.size(); ++i) {
|
|
|
+
|
|
|
+ const RegExMatch::Group& capture = captures[i];
|
|
|
+
|
|
|
+ if (capture.name != p_name)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (capture.start == -1)
|
|
|
+ return String();
|
|
|
+
|
|
|
+ return string.substr(capture.start, capture.length);
|
|
|
+ }
|
|
|
+ return String();
|
|
|
+}
|
|
|
+
|
|
|
+int RegExMatch::get_start(const Variant& p_name) const {
|
|
|
+
|
|
|
+ for (int i = 0; i < captures.size(); ++i)
|
|
|
+ if (captures[i].name == p_name)
|
|
|
+ return captures[i].start;
|
|
|
+ return -1;
|
|
|
+}
|
|
|
+
|
|
|
+int RegExMatch::get_end(const Variant& p_name) const {
|
|
|
+
|
|
|
+ for (int i = 0; i < captures.size(); ++i)
|
|
|
+ if (captures[i].name == p_name)
|
|
|
+ return captures[i].start + captures[i].length;
|
|
|
+ return -1;
|
|
|
+}
|
|
|
+
|
|
|
+RegExMatch::RegExMatch() {
|
|
|
+
|
|
|
+}
|
|
|
+
|
|
|
+static bool RegEx_is_shorthand(CharType ch) {
|
|
|
+
|
|
|
+ switch (ch) {
|
|
|
+ case 'w':
|
|
|
+ case 'W':
|
|
|
+ case 'd':
|
|
|
+ case 'D':
|
|
|
+ case 's':
|
|
|
+ case 'S':
|
|
|
+ return true;
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ return false;
|
|
|
+}
|
|
|
+
|
|
|
+#define REGEX_COMPILE_FAIL(MSG)\
|
|
|
+{\
|
|
|
+ ERR_PRINT(MSG);\
|
|
|
+ clear();\
|
|
|
+ return FAILED;\
|
|
|
+}
|
|
|
+
|
|
|
+Error RegEx::compile(const String& p_pattern) {
|
|
|
+
|
|
|
+ if (pattern == p_pattern)
|
|
|
+ return OK;
|
|
|
+
|
|
|
+ clear();
|
|
|
+ pattern = p_pattern;
|
|
|
+ group_names.push_back(0);
|
|
|
+ RegExNodeGroup* root_group = memnew(RegExNodeCapturing(0));
|
|
|
+ root = root_group;
|
|
|
+ Vector<RegExNodeGroup*> stack;
|
|
|
+ stack.push_back(root_group);
|
|
|
+ int lookahead_level = 0;
|
|
|
+ int numeric_groups = 0;
|
|
|
+ const int numeric_max = 9;
|
|
|
+
|
|
|
+ for (const CharType* c = p_pattern.c_str(); *c != '\0'; ++c) {
|
|
|
+
|
|
|
+ switch (c[0]) {
|
|
|
+ case '(':
|
|
|
+ if (c[1] == '?') {
|
|
|
+
|
|
|
+ RegExNodeGroup* group = NULL;
|
|
|
+ switch (c[2]) {
|
|
|
+ case ':':
|
|
|
+ c = &c[2];
|
|
|
+ group = memnew(RegExNodeGroup());
|
|
|
+ break;
|
|
|
+ case '!':
|
|
|
+ case '=':
|
|
|
+ group = memnew(RegExNodeLookAhead((c[2] == '!'), lookahead_level++));
|
|
|
+ if (lookahead_depth < lookahead_level)
|
|
|
+ lookahead_depth = lookahead_level;
|
|
|
+ c = &c[2];
|
|
|
+ break;
|
|
|
+ case '<':
|
|
|
+ if (c[3] == '!' || c[3] == '=') {
|
|
|
+ group = memnew(RegExNodeLookBehind((c[3] == '!'), lookahead_level++));
|
|
|
+ c = &c[3];
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case 'P':
|
|
|
+ if (c[3] == '<') {
|
|
|
+ const CharType* d = &c[3];
|
|
|
+ Variant name = RegExNodeCapturing::parse_name(d, false);
|
|
|
+ if (name == Variant(-1))
|
|
|
+ REGEX_COMPILE_FAIL("unrecognised character for group name");
|
|
|
+ group = memnew(RegExNodeCapturing(group_names.size()));
|
|
|
+ group_names.push_back(name);
|
|
|
+ c = d;
|
|
|
+ }
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ if (!group)
|
|
|
+ REGEX_COMPILE_FAIL("unrecognised qualifier for group");
|
|
|
+ stack[0]->add_child(group);
|
|
|
+ stack.insert(0, group);
|
|
|
+
|
|
|
+ } else if (numeric_groups < numeric_max) {
|
|
|
+
|
|
|
+ RegExNodeCapturing* group = memnew(RegExNodeCapturing(group_names.size()));
|
|
|
+ group_names.push_back(++numeric_groups);
|
|
|
+ stack[0]->add_child(group);
|
|
|
+ stack.insert(0, group);
|
|
|
+
|
|
|
+ } else {
|
|
|
+
|
|
|
+ RegExNodeGroup* group = memnew(RegExNodeGroup());
|
|
|
+ stack[0]->add_child(group);
|
|
|
+ stack.insert(0, group);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case ')':
|
|
|
+ if (stack.size() == 1)
|
|
|
+ REGEX_COMPILE_FAIL("unexpected ')'");
|
|
|
+ stack.remove(0);
|
|
|
+ break;
|
|
|
+ case '\\':
|
|
|
+ if (('1' <= c[1] && c[1] <= '9') || (c[1] == 'g' && c[2] == '{')) {
|
|
|
+
|
|
|
+ int ref = 0;
|
|
|
+ bool unclosed = false;
|
|
|
+
|
|
|
+ if (c[1] == 'g') {
|
|
|
+ unclosed = true;
|
|
|
+ c = &c[2];
|
|
|
+ }
|
|
|
+
|
|
|
+ while ('0' <= c[1] && c[1] <= '9') {
|
|
|
+ ref = ref * 10 + int(c[1] - '0');
|
|
|
+ ++c;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (unclosed) {
|
|
|
+ if (c[1] != '}')
|
|
|
+ REGEX_COMPILE_FAIL("unclosed backreference '{'");
|
|
|
+ ++c;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ref > numeric_groups || ref <= 0)
|
|
|
+ REGEX_COMPILE_FAIL("backreference not found");
|
|
|
+
|
|
|
+ for (int i = 0; i < stack.size(); ++i)
|
|
|
+ if (dynamic_cast<RegExNodeLookBehind*>(stack[i]))
|
|
|
+ REGEX_COMPILE_FAIL("backreferences inside lookbehind not supported");
|
|
|
+
|
|
|
+ for (int i = 0; i < group_names.size(); ++i) {
|
|
|
+ if (group_names[i].get_type() == Variant::INT && int(group_names[i]) == ref) {
|
|
|
+ ref = group_names[i];
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ stack[0]->add_child(memnew(RegExNodeBackReference(ref)));
|
|
|
+
|
|
|
+ } if (c[1] =='g' && c[2] == '<') {
|
|
|
+
|
|
|
+ const CharType* d = &c[2];
|
|
|
+
|
|
|
+ Variant name = RegExNodeCapturing::parse_name(d, true);
|
|
|
+ if (name == Variant(-1))
|
|
|
+ REGEX_COMPILE_FAIL("unrecognised character for group name");
|
|
|
+
|
|
|
+ c = d;
|
|
|
+
|
|
|
+ for (int i = 0; i < stack.size(); ++i)
|
|
|
+ if (dynamic_cast<RegExNodeLookBehind*>(stack[i]))
|
|
|
+ REGEX_COMPILE_FAIL("backreferences inside lookbehind not supported");
|
|
|
+
|
|
|
+ int ref = -1;
|
|
|
+
|
|
|
+ for (int i = 0; i < group_names.size(); ++i) {
|
|
|
+ if (group_names[i].get_type() == Variant::INT && int(group_names[i]) == ref) {
|
|
|
+ ref = group_names[i];
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ref == -1)
|
|
|
+ REGEX_COMPILE_FAIL("backreference not found");
|
|
|
+
|
|
|
+ stack[0]->add_child(memnew(RegExNodeBackReference(ref)));
|
|
|
+
|
|
|
+ } else if (c[1] == 'b' || c[1] == 'B') {
|
|
|
+
|
|
|
+ stack[0]->add_child(memnew(RegExNodeWordBoundary(*(++c) == 'B')));
|
|
|
+
|
|
|
+ } else if (RegEx_is_shorthand(c[1])) {
|
|
|
+
|
|
|
+ stack[0]->add_child(memnew(RegExNodeShorthand(*(++c))));
|
|
|
+
|
|
|
+ } else {
|
|
|
+
|
|
|
+ const CharType* d = c;
|
|
|
+ CharType ch = RegExNodeChar::parse_escape(d);
|
|
|
+ if (c == d)
|
|
|
+ REGEX_COMPILE_FAIL("invalid escape token");
|
|
|
+ stack[0]->add_child(memnew(RegExNodeChar(ch)));
|
|
|
+ c = d;
|
|
|
+
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case '[':
|
|
|
+ {
|
|
|
+ RegExNodeBracket* bracket = memnew(RegExNodeBracket());
|
|
|
+ stack[0]->add_child(bracket);
|
|
|
+ if (c[1] == '^') {
|
|
|
+ bracket->inverse = true;
|
|
|
+ ++c;
|
|
|
+ }
|
|
|
+ bool first_child = true;
|
|
|
+ CharType previous_child;
|
|
|
+ bool previous_child_single = false;
|
|
|
+ while (true) {
|
|
|
+ ++c;
|
|
|
+ if (!first_child && c[0] == ']') {
|
|
|
+
|
|
|
+ break;
|
|
|
+
|
|
|
+ } else if (c[0] == '\0') {
|
|
|
+
|
|
|
+ REGEX_COMPILE_FAIL("unclosed bracket expression '['");
|
|
|
+
|
|
|
+ } else if (c[0] == '\\') {
|
|
|
+
|
|
|
+ if (RegEx_is_shorthand(c[1])) {
|
|
|
+ bracket->add_child(memnew(RegExNodeShorthand(*(++c))));
|
|
|
+ } else {
|
|
|
+ const CharType* d = c;
|
|
|
+ CharType ch = RegExNodeChar::parse_escape(d);
|
|
|
+ if (c == d)
|
|
|
+ REGEX_COMPILE_FAIL("invalid escape token");
|
|
|
+ bracket->add_child(memnew(RegExNodeChar(ch)));
|
|
|
+ c = d;
|
|
|
+ previous_child = ch;
|
|
|
+ previous_child_single = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ } else if (c[0] == ']' && c[1] == ':') {
|
|
|
+
|
|
|
+ const CharType* d = &c[2];
|
|
|
+ RegExNodeClass::Type type = RegExNodeClass::parse_type(d);
|
|
|
+ if (type != RegExNodeClass::Type_none) {
|
|
|
+
|
|
|
+ c = d;
|
|
|
+ previous_child_single = false;
|
|
|
+
|
|
|
+ } else {
|
|
|
+
|
|
|
+ bracket->add_child(memnew(RegExNodeChar('[')));
|
|
|
+ previous_child = '[';
|
|
|
+ previous_child_single = true;
|
|
|
+ }
|
|
|
+ } else if (previous_child_single && c[0] == '-') {
|
|
|
+
|
|
|
+ if (c[1] != '\0' && c[1] != ']') {
|
|
|
+
|
|
|
+ CharType next;
|
|
|
+
|
|
|
+ if (c[1] == '\\') {
|
|
|
+ const CharType* d = ++c;
|
|
|
+ next = RegExNodeChar::parse_escape(d);
|
|
|
+ if (c == d)
|
|
|
+ REGEX_COMPILE_FAIL("invalid escape token");
|
|
|
+ } else {
|
|
|
+ next = *(++c);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (next < previous_child)
|
|
|
+ REGEX_COMPILE_FAIL("text range out of order");
|
|
|
+
|
|
|
+ bracket->pop_back();
|
|
|
+ bracket->add_child(memnew(RegExNodeRange(previous_child, next)));
|
|
|
+ previous_child_single = false;
|
|
|
+ } else {
|
|
|
+
|
|
|
+ bracket->add_child(memnew(RegExNodeChar('-')));
|
|
|
+ previous_child = '-';
|
|
|
+ previous_child_single = true;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+
|
|
|
+ bracket->add_child(memnew(RegExNodeChar(c[0])));
|
|
|
+ previous_child = c[0];
|
|
|
+ previous_child_single = true;
|
|
|
+ }
|
|
|
+ first_child = false;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case '|':
|
|
|
+ for (int i = 0; i < stack.size(); ++i)
|
|
|
+ if (dynamic_cast<RegExNodeLookBehind*>(stack[i]))
|
|
|
+ REGEX_COMPILE_FAIL("alternations inside lookbehind not supported");
|
|
|
+ stack[0]->add_childset();
|
|
|
+ break;
|
|
|
+ case '^':
|
|
|
+ stack[0]->add_child(memnew(RegExNodeAnchorStart()));
|
|
|
+ break;
|
|
|
+ case '$':
|
|
|
+ stack[0]->add_child(memnew(RegExNodeAnchorEnd()));
|
|
|
+ break;
|
|
|
+ case '.':
|
|
|
+ stack[0]->add_child(memnew(RegExNodeShorthand('.')));
|
|
|
+ break;
|
|
|
+ case '?':
|
|
|
+ case '*':
|
|
|
+ case '+':
|
|
|
+ case '{':
|
|
|
+ {
|
|
|
+ int min_val = 0;
|
|
|
+ int max_val = -1;
|
|
|
+ bool valid = true;
|
|
|
+ const CharType* d = c;
|
|
|
+ bool max_set = true;
|
|
|
+ switch (c[0]) {
|
|
|
+ case '?':
|
|
|
+ min_val = 0;
|
|
|
+ max_val = 1;
|
|
|
+ break;
|
|
|
+ case '*':
|
|
|
+ min_val = 0;
|
|
|
+ max_val = -1;
|
|
|
+ break;
|
|
|
+ case '+':
|
|
|
+ min_val = 1;
|
|
|
+ max_val = -1;
|
|
|
+ break;
|
|
|
+ case '{':
|
|
|
+ max_set = false;
|
|
|
+ while (valid) {
|
|
|
+ ++d;
|
|
|
+ if (d[0] == '}') {
|
|
|
+ break;
|
|
|
+ } else if (d[0] == ',') {
|
|
|
+ max_set = true;
|
|
|
+ } else if ('0' <= d[0] && d[0] <= '9') {
|
|
|
+ if (max_set) {
|
|
|
+ if (max_val < 0)
|
|
|
+ max_val = int(d[0] - '0');
|
|
|
+ else
|
|
|
+ max_val = max_val * 10 + int(d[0] - '0');
|
|
|
+ } else {
|
|
|
+ min_val = min_val * 10 + int(d[0] - '0');
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ valid = false;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!max_set)
|
|
|
+ max_val = min_val;
|
|
|
+
|
|
|
+ if (valid) {
|
|
|
+
|
|
|
+ c = d;
|
|
|
+
|
|
|
+ if (stack[0]->back == NULL || !stack[0]->back->quantifiable)
|
|
|
+ REGEX_COMPILE_FAIL("element not quantifiable");
|
|
|
+
|
|
|
+ if (min_val != max_val)
|
|
|
+ for (int i = 0; i < stack.size(); ++i)
|
|
|
+ if (dynamic_cast<RegExNodeLookBehind*>(stack[i]))
|
|
|
+ REGEX_COMPILE_FAIL("variable length quantifiers inside lookbehind not supported");
|
|
|
+
|
|
|
+ RegExNodeQuantifier* quant = memnew(RegExNodeQuantifier(min_val, max_val));
|
|
|
+ quant->child = stack[0]->swap_back(quant);
|
|
|
+ quant->child->previous = NULL;
|
|
|
+ quant->child->parent = quant;
|
|
|
+
|
|
|
+ if (min_val == max_val && quant->child->length >= 0)
|
|
|
+ quant->length = max_val * quant->child->length;
|
|
|
+
|
|
|
+ if (c[1] == '?') {
|
|
|
+ quant->greedy = false;
|
|
|
+ ++c;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ default:
|
|
|
+ stack[0]->add_child(memnew(RegExNodeChar(c[0])));
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (stack.size() > 1)
|
|
|
+ REGEX_COMPILE_FAIL("unclosed group '('");
|
|
|
+ return OK;
|
|
|
+}
|
|
|
+
|
|
|
+Ref<RegExMatch> RegEx::search(const String& p_text, int p_start, int p_end) const {
|
|
|
+
|
|
|
+ Ref<RegExMatch> res = memnew(RegExMatch());
|
|
|
+
|
|
|
+ for (int i = 0; i < group_names.size(); ++i) {
|
|
|
+ RegExMatch::Group group;
|
|
|
+ group.name = group_names[i];
|
|
|
+ res->captures.push_back(group);
|
|
|
+ }
|
|
|
+
|
|
|
+ res->string = p_text;
|
|
|
+
|
|
|
+ if (p_end < p_start || p_end > p_text.length())
|
|
|
+ p_end = p_text.length();
|
|
|
+
|
|
|
+ RegExSearch s(res, p_end, lookahead_depth);
|
|
|
+
|
|
|
+ for (int i = p_start; i <= s.end; ++i) {
|
|
|
+ for (int c = 0; c < group_names.size(); ++c) {
|
|
|
+ res->captures[c].start = -1;
|
|
|
+ res->captures[c].length = 0;
|
|
|
+ }
|
|
|
+ if (root->test(s, i) >= 0)
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (res->captures[0].start >= 0)
|
|
|
+ return res;
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+
|
|
|
+String RegEx::sub(const String& p_text, const String& p_template, int p_start, int p_end) const {
|
|
|
+
|
|
|
+ Ref<RegExMatch> m = search(p_text, p_start, p_end);
|
|
|
+ RegExMatch::Group& s = m->captures[0];
|
|
|
+ if (s.start >= 0) {
|
|
|
+ String res = p_text.substr(0, s.start) + m->expand(p_template);
|
|
|
+ int end = s.start + s.length;
|
|
|
+ if (end < p_text.length())
|
|
|
+ res += p_text.substr(end, p_text.length() - end);
|
|
|
+ return res;
|
|
|
+ }
|
|
|
+ return p_text;
|
|
|
+}
|
|
|
+
|
|
|
+void RegEx::clear() {
|
|
|
+
|
|
|
+ if (root)
|
|
|
+ memdelete(root);
|
|
|
+
|
|
|
+ pattern.clear();
|
|
|
+ group_names.clear();
|
|
|
+ lookahead_depth = 0;
|
|
|
+}
|
|
|
+
|
|
|
+bool RegEx::is_valid() const {
|
|
|
+
|
|
|
+ return (root != NULL);
|
|
|
+}
|
|
|
+
|
|
|
+String RegEx::get_pattern() const {
|
|
|
+
|
|
|
+ return pattern;
|
|
|
+}
|
|
|
+
|
|
|
+int RegEx::get_group_count() const {
|
|
|
+
|
|
|
+ int count = 0;
|
|
|
+ for (int i = 1; i < group_names.size(); ++i)
|
|
|
+ if (group_names[i].get_type() == Variant::INT)
|
|
|
+ ++count;
|
|
|
+ return count;
|
|
|
+}
|
|
|
+
|
|
|
+Array RegEx::get_names() const {
|
|
|
+
|
|
|
+ Array res;
|
|
|
+ for (int i = 1; i < group_names.size(); ++i)
|
|
|
+ if (group_names[i].get_type() == Variant::STRING)
|
|
|
+ res.push_back(group_names[i]);
|
|
|
+ return res;
|
|
|
+}
|
|
|
+
|
|
|
+RegEx::RegEx() {
|
|
|
+
|
|
|
+ root = NULL;
|
|
|
+ lookahead_depth = 0;
|
|
|
+}
|
|
|
+
|
|
|
+RegEx::RegEx(const String& p_pattern) {
|
|
|
+
|
|
|
+ root = NULL;
|
|
|
+ compile(p_pattern);
|
|
|
+}
|
|
|
+
|
|
|
+RegEx::~RegEx() {
|
|
|
+
|
|
|
+ if (root)
|
|
|
+ memdelete(root);
|
|
|
+}
|
|
|
+
|
|
|
+void RegExMatch::_bind_methods() {
|
|
|
+
|
|
|
+ ObjectTypeDB::bind_method(_MD("expand","template"),&RegExMatch::expand);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_group_count"),&RegExMatch::get_group_count);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_group_array"),&RegExMatch::get_group_array);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_names"),&RegExMatch::get_names);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_name_dict"),&RegExMatch::get_name_dict);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_string","name"),&RegExMatch::get_string, DEFVAL(0));
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_start","name"),&RegExMatch::get_start, DEFVAL(0));
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_end","name"),&RegExMatch::get_end, DEFVAL(0));
|
|
|
+}
|
|
|
+
|
|
|
+void RegEx::_bind_methods() {
|
|
|
+
|
|
|
+ ObjectTypeDB::bind_method(_MD("clear"),&RegEx::clear);
|
|
|
+ ObjectTypeDB::bind_method(_MD("compile","pattern"),&RegEx::compile);
|
|
|
+ ObjectTypeDB::bind_method(_MD("search","text","start","end"),&RegEx::search, DEFVAL(0), DEFVAL(-1));
|
|
|
+ ObjectTypeDB::bind_method(_MD("sub","text","template","start","end"),&RegEx::sub, DEFVAL(0), DEFVAL(-1));
|
|
|
+ ObjectTypeDB::bind_method(_MD("is_valid"),&RegEx::is_valid);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_pattern"),&RegEx::get_pattern);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_group_count"),&RegEx::get_group_count);
|
|
|
+ ObjectTypeDB::bind_method(_MD("get_names"),&RegEx::get_names);
|
|
|
+}
|
|
|
+
|
Zher Huei Lee