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ircd::js: Add string tokenizer; fix split; minor cleanup.

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This commit is contained in:
Jason Volk 2016-10-29 21:15:04 -07:00
parent 845e81e446
commit 771907127e
1 changed files with 65 additions and 48 deletions
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113
include/ircd/js/string.h
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@ -96,10 +96,13 @@ template<class A, class B> string_comparison<A, B> operator!=(const A &a, const
template<lifetime L>
using string_pair = std::pair<string<L>, string<L>>;
template<lifetime L> string_pair<L> split(const typename string<L>::handle &s, const char &c);
template<lifetime L> string_pair<L> split(const typename string<L>::handle &s, const char16_t &c);
template<lifetime L> string<L> substr(const typename string<L>::handle &s, const size_t &pos, const size_t &len);
template<lifetime L> string<L> operator+(const typename string<L>::handle &left, const typename string<L>::handle &right);
template<lifetime L> string_pair<L> split(const string<L> &s, const char &c);
template<lifetime L> string_pair<L> split(const string<L> &s, const char16_t &c);
template<lifetime L> string<L> substr(const string<L> &s, const size_t &pos, const size_t &len);
template<lifetime L> string<L> operator+(const string<L> &left, const string<L> &right);
template<class string> using string_closure = std::function<void (const string &)>;
template<lifetime L> void tokens(const string<L> &, const char &sep, const string_closure<string<L>> &);
template<lifetime L> std::ostream & operator<<(std::ostream &os, const string<L> &s);
@ -284,6 +287,64 @@ operator<<(std::ostream &os, const string<L> &s)
return os;
}
template<lifetime L>
void
tokens(const string<L> &str,
const char &sep,
const string_closure<string<L>> &closure)
{
for(auto pair(split(str, sep));; pair = split(pair.second, sep))
{
closure(pair.first);
if(pair.second.empty())
break;
}
}
template<lifetime L>
std::pair<string<L>, string<L>>
split(const string<L> &s,
const char &c)
{
return split(s, char16_t(c));
}
template<lifetime L>
std::pair<string<L>, string<L>>
split(const string<L> &s,
const char16_t &c)
{
size_t i(0);
for(; i < size(s) && at(s, i) != c; ++i);
return
{
substr(s, 0, i),
i < size(s)? substr(s, i + 1, size(s) - i) : string<L>()
};
}
template<lifetime L>
string<L>
substr(const string<L> &s,
const size_t &pos,
const size_t &len)
{
const auto _len(len == size_t(-1)? size(s) - pos : len);
const auto ret(JS_NewDependentString(*cx, s, pos, _len));
if(!ret)
throw std::out_of_range("substr(): invalid arguments");
return ret;
}
template<lifetime L>
string<L>
operator+(const string<L> &left,
const string<L> &right)
{
return JS_ConcatStrings(*cx, left, right);
}
template<class A,
class B>
string_comparison<A, B>
@ -399,50 +460,6 @@ cmp(const string<A> &a,
return ret;
}
template<lifetime L>
std::pair<string<L>, string<L>>
split(const typename string<L>::handle &s,
const char &c)
{
return {};
}
template<lifetime L>
std::pair<string<L>, string<L>>
split(const typename string<L>::handle &s,
const char16_t &c)
{
size_t i(0);
for(; i < size(s) && at(s, i) != c; ++i);
return
{
substr(s, 0, i),
i < size(s)? substr(s, i + 1, size(s) - i) : string<L>()
};
}
template<lifetime L>
string<L>
substr(const typename string<L>::handle &s,
const size_t &pos,
const size_t &len)
{
const auto _len(len == size_t(-1)? size(s) - pos : len);
const auto ret(JS_NewDependentString(*cx, s, pos, _len));
if(!ret)
throw std::out_of_range("substr(): invalid arguments");
return ret;
}
template<lifetime L>
string<L>
operator+(const typename string<L>::handle &left,
const typename string<L>::handle &right)
{
return JS_ConcatStrings(*cx, left, right);
}
template<class A,
class B>
constexpr bool