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6607f6c235
Implement the decoding half of RFC 3492 so we can demangle our Punycode-encoded Unicode symbol names. Swift SVN r17759
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
//===--- Punycode.h - UTF-8 to Punycode transcoding -------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// These functions implement a variant of the Punycode algorithm from RFC3492,
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// originally designed for encoding international domain names, for the purpose
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// of encoding Swift identifiers into mangled symbol names. This version differs
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// from RFC3492 in the following respects:
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// - '_' is used as the encoding delimiter instead of '-'.
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// - Encoding digits are represented using [a-zA-J] instead of [a-z0-9], because
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// symbol names are case-sensitive, and Swift mangled identifiers cannot begin
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// with a digit.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __SWIFT_BASIC_PUNYCODE_H__
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#define __SWIFT_BASIC_PUNYCODE_H__
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#include "swift/Basic/LLVM.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/SmallVector.h"
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namespace swift {
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namespace Punycode {
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/// Encodes a UTF-8-encoded Unicode string into Punycode.
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void encodePunycode(StringRef inputUTF8,
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SmallVectorImpl<char> &outPunycode);
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/// Decodes a Punycode string into a UTF-8-encoded Unicode string.
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///
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/// Returns true if the encoding failed, false if it succeeded.
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bool decodePunycode(StringRef inputPunycode,
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SmallVectorImpl<char> &outUTF8);
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} // end namespace Punycode
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} // end namespace swift
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#endif
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