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79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef PolicyTokenizer_h___
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#define PolicyTokenizer_h___
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#include "nsContentUtils.h"
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#include "nsString.h"
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/**
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* How does the parsing work?
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*
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* We generate tokens by splitting the policy-string by whitespace and
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* semicolon. Interally the tokens are represented as an array of string-arrays:
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*
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* [
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* [ name, src, src, src, ... ],
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* [ name, src, src, src, ... ],
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* [ name, src, src, src, ... ]
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* ]
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*
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* for example:
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* [
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* [ img-src, http://www.example.com, http:www.test.com ],
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* [ default-src, 'self'],
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* [ script-src, 'unsafe-eval', 'unsafe-inline' ],
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* ]
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*/
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typedef nsTArray<CopyableTArray<nsString> > policyTokens;
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class PolicyTokenizer {
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public:
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static void tokenizePolicy(const nsAString& aPolicyString,
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policyTokens& outTokens);
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private:
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PolicyTokenizer(const char16_t* aStart, const char16_t* aEnd);
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~PolicyTokenizer();
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inline bool atEnd() { return mCurChar >= mEndChar; }
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inline void skipWhiteSpace() {
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while (mCurChar < mEndChar && nsContentUtils::IsHTMLWhitespace(*mCurChar)) {
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mCurChar++;
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}
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mCurToken.Truncate();
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}
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inline void skipWhiteSpaceAndSemicolon() {
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while (mCurChar < mEndChar &&
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(*mCurChar == ';' || nsContentUtils::IsHTMLWhitespace(*mCurChar))) {
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mCurChar++;
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}
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mCurToken.Truncate();
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}
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inline bool accept(char16_t aChar) {
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NS_ASSERTION(mCurChar < mEndChar, "Trying to dereference mEndChar");
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if (*mCurChar == aChar) {
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mCurToken.Append(*mCurChar++);
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return true;
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}
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return false;
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}
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void generateNextToken();
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void generateTokens(policyTokens& outTokens);
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const char16_t* mCurChar;
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const char16_t* mEndChar;
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nsString mCurToken;
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};
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#endif /* PolicyTokenizer_h___ */
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