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ircd::rand: Add fill(mutable_buffer) to interface.

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This commit is contained in:
Jason Volk 2020-10-06 16:01:53 -07:00
parent 767322dc37
commit e69ad0b49a
2 changed files with 26 additions and 0 deletions
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3
include/ircd/rand.h
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@ -37,6 +37,9 @@ namespace ircd::rand
// Random string from dictionary, fills buffer
string_view string(const mutable_buffer &out, const std::string &dict);
// Random fill of buffer
const_buffer fill(const mutable_buffer &out);
}
/// Random character from dictionary

23
ircd/rand.cc
View file

@ -44,6 +44,29 @@ decltype(ircd::rand::dict::numeric) ircd::rand::dict::numeric
"0123456789"
};
ircd::const_buffer
ircd::rand::fill(const mutable_buffer &out)
{
uint64_t *const __restrict__ val
{
reinterpret_cast<uint64_t *>(data(out))
};
constexpr size_t word_size
{
sizeof(*val)
};
size_t i(0);
for(; i < size(out) / word_size; ++i)
val[i] = integer();
for(size_t j(i * word_size); j < size(out) % word_size; ++j)
out[j] = integer();
return out;
}
ircd::string_view
ircd::rand::string(const mutable_buffer &out,
const std::string &dict)