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-rw-r--r--xpcom/ds/nsWhitespaceTokenizer.h96
1 files changed, 96 insertions, 0 deletions
diff --git a/xpcom/ds/nsWhitespaceTokenizer.h b/xpcom/ds/nsWhitespaceTokenizer.h
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+++ b/xpcom/ds/nsWhitespaceTokenizer.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef __nsWhitespaceTokenizer_h
+#define __nsWhitespaceTokenizer_h
+
+#include "mozilla/RangedPtr.h"
+#include "nsDependentSubstring.h"
+#include "nsCRTGlue.h"
+
+template <typename DependentSubstringType, bool IsWhitespace(char16_t)>
+class nsTWhitespaceTokenizer {
+ typedef typename DependentSubstringType::char_type CharType;
+ typedef typename DependentSubstringType::substring_type SubstringType;
+
+ public:
+ explicit nsTWhitespaceTokenizer(const SubstringType& aSource)
+ : mIter(aSource.Data(), aSource.Length()),
+ mEnd(aSource.Data() + aSource.Length(), aSource.Data(),
+ aSource.Length()),
+ mWhitespaceBeforeFirstToken(false),
+ mWhitespaceAfterCurrentToken(false) {
+ while (mIter < mEnd && IsWhitespace(*mIter)) {
+ mWhitespaceBeforeFirstToken = true;
+ ++mIter;
+ }
+ }
+
+ /**
+ * Checks if any more tokens are available.
+ */
+ bool hasMoreTokens() const { return mIter < mEnd; }
+
+ /*
+ * Returns true if there is whitespace prior to the first token.
+ */
+ bool whitespaceBeforeFirstToken() const {
+ return mWhitespaceBeforeFirstToken;
+ }
+
+ /*
+ * Returns true if there is any whitespace after the current token.
+ * This is always true unless we're reading the last token.
+ */
+ bool whitespaceAfterCurrentToken() const {
+ return mWhitespaceAfterCurrentToken;
+ }
+
+ /**
+ * Returns the next token.
+ */
+ const DependentSubstringType nextToken() {
+ const mozilla::RangedPtr<const CharType> tokenStart = mIter;
+ while (mIter < mEnd && !IsWhitespace(*mIter)) {
+ ++mIter;
+ }
+ const mozilla::RangedPtr<const CharType> tokenEnd = mIter;
+ mWhitespaceAfterCurrentToken = false;
+ while (mIter < mEnd && IsWhitespace(*mIter)) {
+ mWhitespaceAfterCurrentToken = true;
+ ++mIter;
+ }
+ return Substring(tokenStart.get(), tokenEnd.get());
+ }
+
+ private:
+ mozilla::RangedPtr<const CharType> mIter;
+ const mozilla::RangedPtr<const CharType> mEnd;
+ bool mWhitespaceBeforeFirstToken;
+ bool mWhitespaceAfterCurrentToken;
+};
+
+template <bool IsWhitespace(char16_t) = NS_IsAsciiWhitespace>
+class nsWhitespaceTokenizerTemplate
+ : public nsTWhitespaceTokenizer<nsDependentSubstring, IsWhitespace> {
+ public:
+ explicit nsWhitespaceTokenizerTemplate(const nsAString& aSource)
+ : nsTWhitespaceTokenizer<nsDependentSubstring, IsWhitespace>(aSource) {}
+};
+
+typedef nsWhitespaceTokenizerTemplate<> nsWhitespaceTokenizer;
+
+template <bool IsWhitespace(char16_t) = NS_IsAsciiWhitespace>
+class nsCWhitespaceTokenizerTemplate
+ : public nsTWhitespaceTokenizer<nsDependentCSubstring, IsWhitespace> {
+ public:
+ explicit nsCWhitespaceTokenizerTemplate(const nsACString& aSource)
+ : nsTWhitespaceTokenizer<nsDependentCSubstring, IsWhitespace>(aSource) {}
+};
+
+typedef nsCWhitespaceTokenizerTemplate<> nsCWhitespaceTokenizer;
+
+#endif /* __nsWhitespaceTokenizer_h */