76 lines
2.9 KiB
C++
76 lines
2.9 KiB
C++
/**
|
|
* Copyright (C) 2015 Topology LP
|
|
* All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal in the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef CPPCODEC_HEX_UPPER
|
|
#define CPPCODEC_HEX_UPPER
|
|
|
|
#include "detail/codec.hpp"
|
|
#include "detail/hex.hpp"
|
|
|
|
namespace cppcodec {
|
|
|
|
namespace detail {
|
|
|
|
static constexpr const char hex_upper_alphabet[] = {
|
|
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
|
|
'A', 'B', 'C', 'D', 'E', 'F'
|
|
};
|
|
|
|
class hex_upper
|
|
{
|
|
public:
|
|
template <typename Codec> using codec_impl = stream_codec<Codec, hex_upper>;
|
|
|
|
static CPPCODEC_ALWAYS_INLINE constexpr size_t alphabet_size() {
|
|
static_assert(sizeof(hex_upper_alphabet) == 16, "hex alphabet must have 16 values");
|
|
return sizeof(hex_upper_alphabet);
|
|
}
|
|
static CPPCODEC_ALWAYS_INLINE constexpr char symbol(alphabet_index_t index)
|
|
{
|
|
return hex_upper_alphabet[index];
|
|
}
|
|
static CPPCODEC_ALWAYS_INLINE constexpr char normalized_symbol(char c)
|
|
{
|
|
// Hex decoding is always case-insensitive (even in RFC 4648), the question
|
|
// is only for encoding whether to use upper-case or lower-case letters.
|
|
return (c >= 'a' && c <= 'f') ? (c - 'a' + 'A') : c;
|
|
}
|
|
|
|
static CPPCODEC_ALWAYS_INLINE constexpr bool generates_padding() { return false; }
|
|
// FIXME: doesn't require padding, but requires a multiple of the encoded block size (2)
|
|
static CPPCODEC_ALWAYS_INLINE constexpr bool requires_padding() { return false; }
|
|
static CPPCODEC_ALWAYS_INLINE constexpr bool is_padding_symbol(char) { return false; }
|
|
static CPPCODEC_ALWAYS_INLINE constexpr bool is_eof_symbol(char c) { return c == '\0'; }
|
|
|
|
// Sometimes hex strings include whitespace, but this variant forbids it.
|
|
static CPPCODEC_ALWAYS_INLINE constexpr bool should_ignore(char) { return false; }
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
using hex_upper = detail::codec<detail::hex<detail::hex_upper>>;
|
|
|
|
} // namespace cppcodec
|
|
|
|
#endif // CPPCODEC_HEX_UPPER
|