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ZERICO2005ZERICO2005
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implemented std::char_traits
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‎src/libcxx/include/__char_traits‎

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// -*- C++ -*-
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#ifndef _EZCXX_CHAR_TRAITS
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#define _EZCXX_CHAR_TRAITS
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#include <cstddef>
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#include <cstdint>
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#include <cstring>
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#include <cstdio>
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#pragma clang system_header
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namespace std {
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using streamoff = ptrdiff_t;
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using streamsize = ptrdiff_t;
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} // namespace std
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namespace std {
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template<class CharT> struct char_traits;
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template<> struct char_traits<char>;
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template<> struct char_traits<char8_t>;
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template<> struct char_traits<char16_t>;
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template<> struct char_traits<char32_t>;
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template<> struct char_traits<wchar_t>;
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template<> struct char_traits<char> {
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using char_type = char;
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using int_type = int;
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using off_type = streamoff;
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static constexpr void assign(char_type& c1, const char_type& c2) noexcept {
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c1 = c2;
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}
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static constexpr bool eq(char_type c1, char_type c2) noexcept {
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return (c1 == c2);
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}
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static constexpr bool lt(char_type c1, char_type c2) noexcept {
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return (c1 < c2);
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}
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static constexpr int compare(const char_type* s1, const char_type* s2, size_t n) {
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return std::memcmp(s1, s2, n);
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}
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static constexpr size_t length(const char_type* s) {
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return std::strlen(s);
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}
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static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a) {
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return static_cast<const char_type*>(std::memchr(s, a, n));
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}
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static constexpr char_type* move(char_type* s1, const char_type* s2, size_t n) {
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return static_cast<char_type*>(std::memmove(s1, s2, n));
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}
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static constexpr char_type* copy(char_type* s1, const char_type* s2, size_t n) {
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return static_cast<char_type*>(std::memcpy(s1, s2, n));
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}
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static constexpr char_type* assign(char_type* s, size_t n, char_type a) {
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return static_cast<char_type*>(std::memset(s, a, n));
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}
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static constexpr char_type to_char_type(int_type c) noexcept {
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return static_cast<char_type>(c);
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}
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static constexpr int_type to_int_type(char_type c) noexcept {
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return static_cast<int_type>(c);
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}
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static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept {
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return (c1 == c2);
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}
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static constexpr int_type eof() noexcept {
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return EOF;
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}
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static constexpr int_type not_eof(int_type c) noexcept {
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return (c != eof()) ? c : '\0';
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}
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};
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template<> struct char_traits<char8_t> {
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using char_type = char8_t;
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using int_type = unsigned int;
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using off_type = streamoff;
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static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
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static constexpr bool eq(char_type c1, char_type c2) noexcept;
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static constexpr bool lt(char_type c1, char_type c2) noexcept;
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static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
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static constexpr size_t length(const char_type* s);
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static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);
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static constexpr char_type* move(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* copy(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* assign(char_type* s, size_t n, char_type a);
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static constexpr char_type to_char_type(int_type c) noexcept;
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static constexpr int_type to_int_type(char_type c) noexcept;
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static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept;
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static constexpr int_type eof() noexcept;
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static constexpr int_type not_eof(int_type c) noexcept;
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};
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template<> struct char_traits<char16_t> {
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using char_type = char16_t;
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using int_type = uint_least16_t;
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using off_type = streamoff;
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static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
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static constexpr bool eq(char_type c1, char_type c2) noexcept;
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static constexpr bool lt(char_type c1, char_type c2) noexcept;
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static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
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static constexpr size_t length(const char_type* s);
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static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);
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static constexpr char_type* move(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* copy(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* assign(char_type* s, size_t n, char_type a);
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static constexpr char_type to_char_type(int_type c) noexcept;
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static constexpr int_type to_int_type(char_type c) noexcept;
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static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept;
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static constexpr int_type eof() noexcept;
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static constexpr int_type not_eof(int_type c) noexcept;
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};
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template<> struct char_traits<char32_t> {
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using char_type = char32_t;
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using int_type = uint_least32_t;
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using off_type = streamoff;
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static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
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static constexpr bool eq(char_type c1, char_type c2) noexcept;
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static constexpr bool lt(char_type c1, char_type c2) noexcept;
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static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
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static constexpr size_t length(const char_type* s);
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static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);
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static constexpr char_type* move(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* copy(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* assign(char_type* s, size_t n, char_type a);
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static constexpr char_type to_char_type(int_type c) noexcept;
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static constexpr int_type to_int_type(char_type c) noexcept;
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static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept;
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static constexpr int_type eof() noexcept;
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static constexpr int_type not_eof(int_type c) noexcept;
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};
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template<> struct char_traits<wchar_t> {
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using char_type = wchar_t;
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using int_type = __WINT_TYPE__;
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using off_type = streamoff;
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static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
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static constexpr bool eq(char_type c1, char_type c2) noexcept;
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static constexpr bool lt(char_type c1, char_type c2) noexcept;
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static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
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static constexpr size_t length(const char_type* s);
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static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);
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static constexpr char_type* move(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* copy(char_type* s1, const char_type* s2, size_t n);
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static constexpr char_type* assign(char_type* s, size_t n, char_type a);
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static constexpr char_type to_char_type(int_type c) noexcept;
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static constexpr int_type to_int_type(char_type c) noexcept;
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static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept;
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static constexpr int_type eof() noexcept;
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static constexpr int_type not_eof(int_type c) noexcept;
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};
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} // namespace std
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#endif // _EZCXX_CHAR_TRAITS

‎src/libcxx/include/string‎

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#include <cstdio>
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#include <cstdlib>
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#include <EASTL/string.h>
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#include <__char_traits>
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#pragma clang system_header
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namespace std {
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template<
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typename CharT,
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typename Traits = std::char_traits<CharT>,
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typename Allocator = eastl::allocator
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>
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using basic_string = eastl::basic_string<CharT, Allocator>;
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inline string to_string(int value) {
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char buf[sizeof("-8388608")];
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boot_sprintf(buf, "%d", value);

‎src/libcxx/include/string_view‎

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#include <__eastl_config>
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#include <EASTL/string_view.h>
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#include <__char_traits>
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#pragma clang system_header
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namespace std {
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template<
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typename CharT,
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typename Traits = std::char_traits<CharT>
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>
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using basic_string_view = eastl::basic_string_view<CharT>;
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} // namespace std
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#endif // _EZCXX_STRING_VIEW

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