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@@ -0,0 +1,48 @@
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+# HG changeset patch
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+# User Robert Helmer <rhelmer@mozilla.com>
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+# Date 1529540477 25200
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+# Node ID 9b41ca132dbc6462cc5afbd52b06a9a9b5b00c12
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+# Parent 1e6b919293b6075e306b013f76230ecef262d59d
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+Bug 1421501 - WebIDL and DOM for PrioEncoder r=edgar,hsivonen
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+
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+mfbt only part for later SpiderMonkey changes.
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+
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+MozReview-Commit-ID: L8htRm3J1mZ
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+
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+diff --git a/mfbt/TextUtils.h b/mfbt/TextUtils.h
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+--- a/mfbt/TextUtils.h
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++++ b/mfbt/TextUtils.h
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+@@ -116,16 +116,32 @@ constexpr bool
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+ IsAsciiDigit(Char aChar)
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+ {
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+ using UnsignedChar = typename detail::MakeUnsignedChar<Char>::Type;
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+ auto uc = static_cast<UnsignedChar>(aChar);
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+ return '0' <= uc && uc <= '9';
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+ }
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+
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+ /**
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++ * Returns true iff |aChar| matches [0-9a-fA-F].
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++ *
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++ * This function is basically isxdigit, but guaranteed to be only for ASCII.
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++ */
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++template<typename Char>
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++constexpr bool
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++IsAsciiHexDigit(Char aChar)
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++{
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++ using UnsignedChar = typename detail::MakeUnsignedChar<Char>::Type;
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++ auto uc = static_cast<UnsignedChar>(aChar);
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++ return ('0' <= uc && uc <= '9') ||
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++ ('a' <= uc && uc <= 'f') ||
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++ ('A' <= uc && uc <= 'F');
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++}
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++
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++/**
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+ * Returns true iff |aChar| matches [a-zA-Z0-9].
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+ *
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+ * This function is basically what you thought isalnum was, except its behavior
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+ * doesn't depend on the user's current locale.
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+ */
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+ template<typename Char>
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+ constexpr bool
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+ IsAsciiAlphanumeric(Char aChar)
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+
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Frank-Rainer Grahl