diff options
author | Karen Arutyunov <karen@codesynthesis.com> | 2017-05-01 16:08:43 +0300 |
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committer | Karen Arutyunov <karen@codesynthesis.com> | 2017-05-01 16:59:24 +0300 |
commit | 61377c582e0f2675baa5f5e6e30a35d1a4164b33 (patch) | |
tree | 11cdca992834d7f7f197f72856712fbcb3020e3d /butl/base64.cxx | |
parent | 442c1a6790e52baa0c081f310d4d9e9b6f1ff638 (diff) |
Add hxx extension for headers and lib prefix for library dir
Diffstat (limited to 'butl/base64.cxx')
-rw-r--r-- | butl/base64.cxx | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/butl/base64.cxx b/butl/base64.cxx deleted file mode 100644 index ee44700..0000000 --- a/butl/base64.cxx +++ /dev/null @@ -1,211 +0,0 @@ -// file : butl/base64.cxx -*- C++ -*- -// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd -// license : MIT; see accompanying LICENSE file - -#include <butl/base64> - -#include <cstddef> // size_t -#include <istream> -#include <ostream> -#include <iterator> // {istreambuf, ostreambuf, back_insert}_iterator -#include <stdexcept> // invalid_argument - -using namespace std; - -namespace butl -{ - static const char codes[] = - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; - - // base64-encode the data in the iterator range [i, e). Write the encoded - // data starting at the iterator position o. - // - template <typename I, typename O> - static void - base64_encode (I& i, const I& e, O& o) - { - const size_t un (65); // Non-existing index of the codes string. - for (size_t n (0); i != e; ++n) - { - if (n && n % 19 == 0) - *o++ = '\n'; // Split into lines, like the base64 utility does. - - char c (*i++); - size_t i1 ((c >> 2) & 0x3F); - size_t i2 ((c << 4) & 0x30); - - size_t i3 (un); - if (i != e) - { - c = *i++; - i2 |= (c >> 4) & 0xF; - i3 = (c << 2) & 0x3C; - } - - size_t i4 (un); - if (i != e) - { - c = *i++; - i3 |= (c >> 6) & 0x3; - i4 = c & 0x3F; - } - - *o++ = codes[i1]; - *o++ = codes[i2]; - *o++ = i3 == un ? '=' : codes[i3]; - *o++ = i4 == un ? '=' : codes[i4]; - } - } - - static char - index (char c) - { - switch (c) - { - case '/': return 63; - case '+': return 62; - default: - { - if (c >= 'A' && c <= 'Z') - return c - 'A'; - else if (c >= 'a' && c <= 'z') - return c - 'a' + 26; - else if (c >= '0' && c <= '9') - return c - '0' + 52; - else - throw invalid_argument ("invalid input"); - } - } - } - - // base64-decode the data in the iterator range [i, e). Write the decoded - // data starting at the iterator position o. Throw invalid_argument if the - // input data is invalid. - // - template <typename I, typename O> - static void - base64_decode (I& i, const I& e, O& o) - { - auto bad = []() {throw invalid_argument ("invalid input");}; - - auto next = [&i, &e, &bad]() -> char - { - if (i == e) - bad (); - return *i++; - }; - - while (i != e) - { - char c (next ()); - if (c == '\n') // @@ Should we check for '\r' as well ? - continue; - - char i1 = index (c); - char i2 = index (next ()); - *o++ = (i1 << 2) | (i2 >> 4); - - c = next (); - if (c == '=') - { - if (next () != '=' || i != e) - bad (); - } - else - { - char i3 = index (c); - *o++ = (i2 << 4) | (i3 >> 2); - - c = next (); - if (c == '=') - { - if (i != e) - bad (); - } - else - *o++ = (i3 << 6) | index (c); - } - } - } - - string - base64_encode (istream& is) - { - if (!is.good ()) - throw invalid_argument ("bad stream"); - - string r; - istreambuf_iterator<char> i (is); - back_insert_iterator<string> o (r); - - base64_encode (i, istreambuf_iterator<char> (), o); - is.setstate (istream::eofbit); - return r; - } - - void - base64_encode (ostream& os, istream& is) - { - if (!os.good () || !is.good ()) - throw invalid_argument ("bad stream"); - - istreambuf_iterator<char> i (is); - ostreambuf_iterator<char> o (os); - base64_encode (i, istreambuf_iterator<char> (), o); - - if (o.failed ()) - os.setstate (istream::badbit); - - is.setstate (istream::eofbit); - } - - string - base64_encode (const vector<char>& v) - { - string r; - back_insert_iterator<string> o (r); - auto i (v.begin ()); - base64_encode (i, v.end (), o); - return r; - } - - void - base64_decode (ostream& os, istream& is) - { - if (!os.good () || !is.good ()) - throw invalid_argument ("bad stream"); - - istreambuf_iterator<char> i (is); - ostreambuf_iterator<char> o (os); - base64_decode (i, istreambuf_iterator<char> (), o); - - if (o.failed ()) - os.setstate (istream::badbit); - - is.setstate (istream::eofbit); - } - - void - base64_decode (ostream& os, const string& s) - { - if (!os.good ()) - throw invalid_argument ("bad stream"); - - ostreambuf_iterator<char> o (os); - auto i (s.cbegin ()); - base64_decode (i, s.cend (), o); - - if (o.failed ()) - os.setstate (istream::badbit); - } - - vector<char> - base64_decode (const string& s) - { - vector<char> r; - back_insert_iterator<vector<char>> o (r); - auto i (s.cbegin ()); - base64_decode (i, s.cend (), o); - return r; - } -} |