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// file : libbuild2/utility.txx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
namespace build2
{
template <typename I, typename F>
void
append_option_values (cstrings& ss, const char* o, I b, I e, F&& get)
{
if (b != e)
{
ss.reserve (ss.size () + (e - b));
for (; b != e; ++b)
{
ss.push_back (o);
ss.push_back (get (*b));
}
}
}
template <typename I, typename F>
void
append_option_values (sha256& cs, const char* o, I b, I e, F&& get)
{
for (; b != e; ++b)
{
cs.append (o);
cs.append (get (*b));
}
}
template <typename I, typename F>
void
append_combined_option_values (strings& ss, const char* o, I b, I e, F&& get)
{
if (b != e)
{
ss.reserve (ss.size () + (e - b));
for (; b != e; ++b)
ss.push_back (string (o) += get (*b));
}
}
template <typename K>
basic_path<char, K>
relative (const basic_path<char, K>& p)
{
using path = basic_path<char, K>;
const dir_path& b (*relative_base);
if (p.simple () || b.empty ())
return p;
if (p.sub (b))
return p.leaf (b);
if (p.root_directory () == b.root_directory ())
{
path r (p.relative (b));
if (r.string ().size () < p.string ().size ())
return r;
}
return p;
}
}
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