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ircd::fmt: Add "%param" and "%parv" for middle and full-vector, respectively.

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This commit is contained in:
Jason Volk 2016-09-17 19:35:55 -07:00
parent fb50f82b6e
commit ccac92704d
1 changed files with 112 additions and 0 deletions
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112
ircd/fmt.cc
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@ -53,6 +53,28 @@ std::map<std::string, specifier *> _specifiers;
template<class generator> bool generate_string(char *&out, const generator &, const arg &);
template<class integer> bool generate_integer(char *&out, const size_t &max, const spec &, const integer &i);
struct param_specifier
:specifier
{
bool operator()(char *&out, const size_t &max, const spec &, const arg &) const override;
using specifier::specifier;
}
const param_specifier
{
"param"s
};
struct parv_specifier
:specifier
{
bool operator()(char *&out, const size_t &max, const spec &, const arg &) const override;
using specifier::specifier;
}
const parv_specifier
{
"parv"s
};
struct nick_specifier
:specifier
{
@ -588,6 +610,96 @@ const
return generate_string(out, maxwidth(max)[generator] | eps[throw_illegal], val);
}
bool
fmt::parv_specifier::operator()(char *&out,
const size_t &max,
const spec &spec,
const arg &val)
const
{
using karma::eps;
using karma::delimit;
using karma::maxwidth;
static const auto throw_illegal([]
{
throw illegal("Argument is not a valid IRC parameter vector");
});
const auto &ptr(get<0>(val));
const auto &type(get<1>(val));
if(type == typeid(const rfc1459::parv))
{
/*
struct generator
:rfc1459::gen::grammar<char *, rfc1459::parv>
{
generator(): grammar{grammar::params} {}
}
static const generator;
const auto &parv(*reinterpret_cast<const rfc1459::parv *>(ptr));
return karma::generate(out, maxwidth(max)[generator] | eps[throw_illegal], parv);
*/
struct generate_middle
:rfc1459::gen::grammar<char *, std::string()>
{
generate_middle(): grammar{grammar::middle} {}
}
static const generate_middle;
struct generate_trailing
:rfc1459::gen::grammar<char *, std::string()>
{
generate_trailing(): grammar{grammar::trailing} {}
}
static const generate_trailing;
const auto &parv(*reinterpret_cast<const rfc1459::parv *>(ptr));
const char *const start(out);
const auto remain([&start, &out, &max]
{
return max - (out - start);
});
ssize_t i(0);
for(; i < ssize_t(parv.size()) - 1; ++i)
if(!karma::generate(out, maxwidth(remain())[delimit[generate_middle]], parv.at(i)))
throw illegal("Invalid middle parameter");
if(!parv.empty())
if(!karma::generate(out, maxwidth(remain())[generate_trailing], parv.at(parv.size() - 1)))
throw illegal("Invalid trailing parameter");
return true;
}
else return false;
}
bool
fmt::param_specifier::operator()(char *&out,
const size_t &max,
const spec &spec,
const arg &val)
const
{
using karma::eps;
using karma::maxwidth;
static const auto throw_illegal([]
{
throw illegal("Argument is not a valid IRC 'middle' parameter");
});
struct generator
:rfc1459::gen::grammar<char *, std::string()>
{
generator(): grammar{grammar::middle} {}
}
static const generator;
return generate_string(out, maxwidth(max)[generator] | eps[throw_illegal], val);
}
template<class integer>
bool
fmt::generate_integer(char *&out,