/*
 * Copyright (C) 2006 Alexey Proskuryakov <ap@webkit.org>
 * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef Base64_h
#define Base64_h

#include "platform/wtf/Vector.h"
#include "platform/wtf/WTFExport.h"
#include "platform/wtf/text/CString.h"
#include "platform/wtf/text/WTFString.h"

namespace WTF {

enum Base64EncodePolicy { kBase64DoNotInsertLFs, kBase64InsertLFs };

enum Base64DecodePolicy { kBase64DoNotValidatePadding, kBase64ValidatePadding };

WTF_EXPORT void Base64Encode(const char*,
                             unsigned,
                             Vector<char>&,
                             Base64EncodePolicy = kBase64DoNotInsertLFs);
WTF_EXPORT void Base64Encode(const Vector<char>&,
                             Vector<char>&,
                             Base64EncodePolicy = kBase64DoNotInsertLFs);
WTF_EXPORT void Base64Encode(const CString&,
                             Vector<char>&,
                             Base64EncodePolicy = kBase64DoNotInsertLFs);
WTF_EXPORT String Base64Encode(const char*,
                               unsigned,
                               Base64EncodePolicy = kBase64DoNotInsertLFs);
WTF_EXPORT String Base64Encode(const Vector<char>&,
                               Base64EncodePolicy = kBase64DoNotInsertLFs);
WTF_EXPORT String Base64Encode(const Vector<unsigned char>&,
                               Base64EncodePolicy = kBase64DoNotInsertLFs);
WTF_EXPORT String Base64Encode(const CString&,
                               Base64EncodePolicy = kBase64DoNotInsertLFs);

WTF_EXPORT bool Base64Decode(
    const String&,
    Vector<char>&,
    CharacterMatchFunctionPtr should_ignore_character = 0,
    Base64DecodePolicy = kBase64DoNotValidatePadding);
WTF_EXPORT bool Base64Decode(
    const Vector<char>&,
    Vector<char>&,
    CharacterMatchFunctionPtr should_ignore_character = 0,
    Base64DecodePolicy = kBase64DoNotValidatePadding);
WTF_EXPORT bool Base64Decode(
    const char*,
    unsigned,
    Vector<char>&,
    CharacterMatchFunctionPtr should_ignore_character = 0,
    Base64DecodePolicy = kBase64DoNotValidatePadding);
WTF_EXPORT bool Base64Decode(
    const UChar*,
    unsigned,
    Vector<char>&,
    CharacterMatchFunctionPtr should_ignore_character = 0,
    Base64DecodePolicy = kBase64DoNotValidatePadding);

// Given an encoding in either base64 or base64url, returns a normalized
// encoding in plain base64.
WTF_EXPORT String NormalizeToBase64(const String&);

WTF_EXPORT String Base64URLEncode(const char*,
                                  unsigned,
                                  Base64EncodePolicy = kBase64DoNotInsertLFs);

inline void Base64Encode(const Vector<char>& in,
                         Vector<char>& out,
                         Base64EncodePolicy policy) {
  Base64Encode(in.data(), in.size(), out, policy);
}

inline void Base64Encode(const CString& in,
                         Vector<char>& out,
                         Base64EncodePolicy policy) {
  Base64Encode(in.data(), in.length(), out, policy);
}

inline String Base64Encode(const Vector<char>& in, Base64EncodePolicy policy) {
  return Base64Encode(in.data(), in.size(), policy);
}

inline String Base64Encode(const Vector<unsigned char>& in,
                           Base64EncodePolicy policy) {
  return Base64Encode(reinterpret_cast<const char*>(in.data()), in.size(),
                      policy);
}

inline String Base64Encode(const CString& in, Base64EncodePolicy policy) {
  return Base64Encode(in.data(), in.length(), policy);
}

}  // namespace WTF

using WTF::Base64EncodePolicy;
using WTF::kBase64DoNotInsertLFs;
using WTF::kBase64InsertLFs;
using WTF::Base64DecodePolicy;
using WTF::kBase64DoNotValidatePadding;
using WTF::kBase64ValidatePadding;
using WTF::Base64Encode;
using WTF::Base64Decode;

#endif  // Base64_h
