cppcodec/cppcodec/base32_hex.hpp at master · tplgy/cppcodec · GitHub

History

76 lines (63 loc) · 3 KB

Raw

/**

* 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_BASE32_HEX

#define CPPCODEC_BASE32_HEX

#include "detail/codec.hpp"

#include "detail/base32.hpp"

namespace cppcodec {

namespace detail {

// RFC 4648 also specifies a hex encoding system which uses 0-9, then A-V.

static constexpr const char base32_hex_alphabet[] = {

'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',

'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',

'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V'

};

class base32_hex

{

public:

template <typename Codec> using codec_impl = stream_codec<Codec, base32_hex>;

static CPPCODEC_ALWAYS_INLINE constexpr size_t alphabet_size() {

static_assert(sizeof(base32_hex_alphabet) == 32, "base32 alphabet must have 32 values");

return sizeof(base32_hex_alphabet);

}

static CPPCODEC_ALWAYS_INLINE constexpr char symbol(alphabet_index_t idx)

{

return base32_hex_alphabet[idx];

}

static CPPCODEC_ALWAYS_INLINE constexpr char normalized_symbol(char c)

{

// Lower-case letters are accepted, though not generally expected.

return (c >= 'a' && c <= 'v') ? (c - 'a' + 'A') : c;

}

static CPPCODEC_ALWAYS_INLINE constexpr bool generates_padding() { return true; }

static CPPCODEC_ALWAYS_INLINE constexpr bool requires_padding() { return true; }

static CPPCODEC_ALWAYS_INLINE constexpr char padding_symbol() { return '='; }

static CPPCODEC_ALWAYS_INLINE constexpr bool is_padding_symbol(char c) { return c == '='; }

static CPPCODEC_ALWAYS_INLINE constexpr bool is_eof_symbol(char c) { return c == '\0'; }

// RFC4648 does not specify any whitespace being allowed in base32 encodings.

static CPPCODEC_ALWAYS_INLINE constexpr bool should_ignore(char) { return false; }

};

} // namespace detail

using base32_hex = detail::codec<detail::base32<detail::base32_hex>>;

} // namespace cppcodec

#endif // CPPCODEC_BASE32_HEX

cppcodec/cppcodec/base32_hex.hpp at master · tplgy/cppcodec · GitHub

Uh oh!

Expand file tree

Breadcrumbs

base32_hex.hpp

Latest commit

History

Breadcrumbs

base32_hex.hpp

File metadata and controls