#ifndef __CHAR16PTR_H__
#define __CHAR16PTR_H__
#include <cstddef>
#include "unicode/utypes.h"
U_NAMESPACE_BEGIN
#ifdef U_ALIASING_BARRIER
#elif (defined(__clang__) || defined(__GNUC__)) && U_PLATFORM != U_PF_BROWSER_NATIVE_CLIENT
# define U_ALIASING_BARRIER(ptr) asm volatile("" : : "rm"(ptr) : "memory")
#endif
class U_COMMON_API Char16Ptr U_FINAL {
public:
inline Char16Ptr(char16_t *p);
#if !U_CHAR16_IS_TYPEDEF
inline Char16Ptr(uint16_t *p);
#endif
#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
inline Char16Ptr(wchar_t *p);
#endif
inline Char16Ptr(std::nullptr_t p);
inline ~Char16Ptr();
inline char16_t *get() const;
inline operator char16_t *() const { return get(); }
private:
Char16Ptr() = delete;
#ifdef U_ALIASING_BARRIER
template<typename T> static char16_t *cast(T *t) {
U_ALIASING_BARRIER(t);
return reinterpret_cast<char16_t *>(t);
}
char16_t *p_;
#else
union {
char16_t *cp;
uint16_t *up;
wchar_t *wp;
} u_;
#endif
};
#ifdef U_ALIASING_BARRIER
Char16Ptr::Char16Ptr(char16_t *p) : p_(p) {}
#if !U_CHAR16_IS_TYPEDEF
Char16Ptr::Char16Ptr(uint16_t *p) : p_(cast(p)) {}
#endif
#if U_SIZEOF_WCHAR_T==2
Char16Ptr::Char16Ptr(wchar_t *p) : p_(cast(p)) {}
#endif
Char16Ptr::Char16Ptr(std::nullptr_t p) : p_(p) {}
Char16Ptr::~Char16Ptr() {
U_ALIASING_BARRIER(p_);
}
char16_t *Char16Ptr::get() const { return p_; }
#else
Char16Ptr::Char16Ptr(char16_t *p) { u_.cp = p; }
#if !U_CHAR16_IS_TYPEDEF
Char16Ptr::Char16Ptr(uint16_t *p) { u_.up = p; }
#endif
#if U_SIZEOF_WCHAR_T==2
Char16Ptr::Char16Ptr(wchar_t *p) { u_.wp = p; }
#endif
Char16Ptr::Char16Ptr(std::nullptr_t p) { u_.cp = p; }
Char16Ptr::~Char16Ptr() {}
char16_t *Char16Ptr::get() const { return u_.cp; }
#endif
class U_COMMON_API ConstChar16Ptr U_FINAL {
public:
inline ConstChar16Ptr(const char16_t *p);
#if !U_CHAR16_IS_TYPEDEF
inline ConstChar16Ptr(const uint16_t *p);
#endif
#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
inline ConstChar16Ptr(const wchar_t *p);
#endif
inline ConstChar16Ptr(const std::nullptr_t p);
inline ~ConstChar16Ptr();
inline const char16_t *get() const;
inline operator const char16_t *() const { return get(); }
private:
ConstChar16Ptr() = delete;
#ifdef U_ALIASING_BARRIER
template<typename T> static const char16_t *cast(const T *t) {
U_ALIASING_BARRIER(t);
return reinterpret_cast<const char16_t *>(t);
}
const char16_t *p_;
#else
union {
const char16_t *cp;
const uint16_t *up;
const wchar_t *wp;
} u_;
#endif
};
#ifdef U_ALIASING_BARRIER
ConstChar16Ptr::ConstChar16Ptr(const char16_t *p) : p_(p) {}
#if !U_CHAR16_IS_TYPEDEF
ConstChar16Ptr::ConstChar16Ptr(const uint16_t *p) : p_(cast(p)) {}
#endif
#if U_SIZEOF_WCHAR_T==2
ConstChar16Ptr::ConstChar16Ptr(const wchar_t *p) : p_(cast(p)) {}
#endif
ConstChar16Ptr::ConstChar16Ptr(const std::nullptr_t p) : p_(p) {}
ConstChar16Ptr::~ConstChar16Ptr() {
U_ALIASING_BARRIER(p_);
}
const char16_t *ConstChar16Ptr::get() const { return p_; }
#else
ConstChar16Ptr::ConstChar16Ptr(const char16_t *p) { u_.cp = p; }
#if !U_CHAR16_IS_TYPEDEF
ConstChar16Ptr::ConstChar16Ptr(const uint16_t *p) { u_.up = p; }
#endif
#if U_SIZEOF_WCHAR_T==2
ConstChar16Ptr::ConstChar16Ptr(const wchar_t *p) { u_.wp = p; }
#endif
ConstChar16Ptr::ConstChar16Ptr(const std::nullptr_t p) { u_.cp = p; }
ConstChar16Ptr::~ConstChar16Ptr() {}
const char16_t *ConstChar16Ptr::get() const { return u_.cp; }
#endif
inline const UChar *toUCharPtr(const char16_t *p) {
#ifdef U_ALIASING_BARRIER
U_ALIASING_BARRIER(p);
#endif
return reinterpret_cast<const UChar *>(p);
}
inline UChar *toUCharPtr(char16_t *p) {
#ifdef U_ALIASING_BARRIER
U_ALIASING_BARRIER(p);
#endif
return reinterpret_cast<UChar *>(p);
}
inline const OldUChar *toOldUCharPtr(const char16_t *p) {
#ifdef U_ALIASING_BARRIER
U_ALIASING_BARRIER(p);
#endif
return reinterpret_cast<const OldUChar *>(p);
}
inline OldUChar *toOldUCharPtr(char16_t *p) {
#ifdef U_ALIASING_BARRIER
U_ALIASING_BARRIER(p);
#endif
return reinterpret_cast<OldUChar *>(p);
}
U_NAMESPACE_END
#endif // __CHAR16PTR_H__