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generalize temp cstrings for any range type

master
Daniel Kolesa 2016-03-21 21:21:41 +00:00
parent 4854242918
commit e48642659d
1 changed files with 13 additions and 12 deletions
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25
ostd/string.hh
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@ -850,10 +850,11 @@ String to_string(std::initializer_list<T> init) {
return to_string(iter(init)); return to_string(iter(init));
} }
template<typename T> template<typename R>
struct TempCString { struct TempCString {
private: private:
T *p_buf; using Value = RemoveConst<RangeValue<R>>;
Value *p_buf;
bool p_allocated; bool p_allocated;
public: public:
@ -863,15 +864,14 @@ public:
s.p_buf = nullptr; s.p_buf = nullptr;
s.p_allocated = false; s.p_allocated = false;
} }
TempCString(CharRangeBase<const T> input, T *sbuf, Size bufsize) TempCString(R input, Value *sbuf, Size bufsize)
: p_buf(nullptr), p_allocated(false) { : p_buf(nullptr), p_allocated(false) {
if (!input.size()) return; if (input.empty()) return;
if (input.size() >= bufsize) { if (input.size() >= bufsize) {
p_buf = new T[input.size() + 1]; p_buf = new Value[input.size() + 1];
p_allocated = true; p_allocated = true;
} else p_buf = sbuf; } else p_buf = sbuf;
memcpy(p_buf, input.data(), input.size()); p_buf[input.copy(p_buf)] = '\0';
p_buf[input.size()] = '\0';
} }
~TempCString() { ~TempCString() {
if (p_allocated) delete[] p_buf; if (p_allocated) delete[] p_buf;
@ -883,8 +883,8 @@ public:
return *this; return *this;
} }
operator const T *() const { return p_buf; } operator const Value *() const { return p_buf; }
const T *get() const { return p_buf; } const Value *get() const { return p_buf; }
void swap(TempCString &s) { void swap(TempCString &s) {
detail::swap_adl(p_buf, s.p_buf); detail::swap_adl(p_buf, s.p_buf);
@ -892,9 +892,10 @@ public:
} }
}; };
inline TempCString<char> to_temp_cstr(ConstCharRange input, template<typename R>
char *buf, Size bufsize) { inline TempCString<R> to_temp_cstr(R input, RemoveConst<RangeValue<R>> *buf,
return TempCString<char>(input, buf, bufsize); Size bufsize) {
return TempCString<R>(input, buf, bufsize);
} }
} /* namespace ostd */ } /* namespace ostd */