// -*- C++ -*- //===-------_------------ constexpr_char_traits ---------------------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #ifndef _CONSTEXPR_CHAR_TRAITS #define _CONSTEXPR_CHAR_TRAITS #include <__config> #include <string> template <class _CharT> struct constexpr_char_traits { typedef _CharT char_type; typedef int int_type; typedef std::streamoff off_type; typedef std::streampos pos_type; typedef std::mbstate_t state_type; static _LIBCPP_CONSTEXPR_AFTER_CXX11 void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;} static _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT {return __c1 == __c2;} static _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT {return __c1 < __c2;} static _LIBCPP_CONSTEXPR_AFTER_CXX11 int compare(const char_type* __s1, const char_type* __s2, size_t __n); static _LIBCPP_CONSTEXPR_AFTER_CXX11 size_t length(const char_type* __s); static _LIBCPP_CONSTEXPR_AFTER_CXX11 const char_type* find(const char_type* __s, size_t __n, const char_type& __a); static _LIBCPP_CONSTEXPR_AFTER_CXX11 char_type* move(char_type* __s1, const char_type* __s2, size_t __n); static _LIBCPP_CONSTEXPR_AFTER_CXX11 char_type* copy(char_type* __s1, const char_type* __s2, size_t __n); static _LIBCPP_CONSTEXPR_AFTER_CXX11 char_type* assign(char_type* __s, size_t __n, char_type __a); static _LIBCPP_CONSTEXPR int_type not_eof(int_type __c) _NOEXCEPT {return eq_int_type(__c, eof()) ? ~eof() : __c;} static _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT {return char_type(__c);} static _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT {return int_type(__c);} static _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT {return __c1 == __c2;} static _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT {return int_type(EOF);} }; template <class _CharT> _LIBCPP_CONSTEXPR_AFTER_CXX11 int constexpr_char_traits<_CharT>::compare(const char_type* __s1, const char_type* __s2, size_t __n) { for (; __n; --__n, ++__s1, ++__s2) { if (lt(*__s1, *__s2)) return -1; if (lt(*__s2, *__s1)) return 1; } return 0; } template <class _CharT> _LIBCPP_CONSTEXPR_AFTER_CXX11 size_t constexpr_char_traits<_CharT>::length(const char_type* __s) { size_t __len = 0; for (; !eq(*__s, char_type(0)); ++__s) ++__len; return __len; } template <class _CharT> _LIBCPP_CONSTEXPR_AFTER_CXX11 const _CharT* constexpr_char_traits<_CharT>::find(const char_type* __s, size_t __n, const char_type& __a) { for (; __n; --__n) { if (eq(*__s, __a)) return __s; ++__s; } return 0; } template <class _CharT> _LIBCPP_CONSTEXPR_AFTER_CXX11 _CharT* constexpr_char_traits<_CharT>::move(char_type* __s1, const char_type* __s2, size_t __n) { char_type* __r = __s1; if (__s1 < __s2) { for (; __n; --__n, ++__s1, ++__s2) assign(*__s1, *__s2); } else if (__s2 < __s1) { __s1 += __n; __s2 += __n; for (; __n; --__n) assign(*--__s1, *--__s2); } return __r; } template <class _CharT> _LIBCPP_CONSTEXPR_AFTER_CXX11 _CharT* constexpr_char_traits<_CharT>::copy(char_type* __s1, const char_type* __s2, size_t __n) { _LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range"); char_type* __r = __s1; for (; __n; --__n, ++__s1, ++__s2) assign(*__s1, *__s2); return __r; } template <class _CharT> _LIBCPP_CONSTEXPR_AFTER_CXX11 _CharT* constexpr_char_traits<_CharT>::assign(char_type* __s, size_t __n, char_type __a) { char_type* __r = __s; for (; __n; --__n, ++__s) assign(*__s, __a); return __r; } #endif // _CONSTEXPR_CHAR_TRAITS