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common: fix trim functions for wchar_t

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yuyoyuppe
2020-09-17 22:34:05 +03:00
committed by Andrey Nekrasov
parent 7893f387d5
commit 2bc3480396
1 changed files with 18 additions and 7 deletions
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25
src/common/string_utils.h
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@@ -5,27 +5,38 @@
#include <algorithm> #include <algorithm>
template<typename CharT> template<typename CharT>
inline constexpr std::basic_string_view<CharT> default_trim_arg() struct default_trim_arg
{ {
return reinterpret_cast<CharT*>(" \t\r\n"); };
}
template <typename CharT> template<>
inline std::basic_string_view<CharT> left_trim(std::basic_string_view<CharT> s, const std::basic_string_view<CharT> chars_to_trim = default_trim_arg<CharT>()) struct default_trim_arg<char>
{
static inline constexpr std::string_view value = " \t\r\n";
};
template<>
struct default_trim_arg<wchar_t>
{
static inline constexpr std::wstring_view value = L" \t\r\n";
};
template<typename CharT>
inline std::basic_string_view<CharT> left_trim(std::basic_string_view<CharT> s, const std::basic_string_view<CharT> chars_to_trim = default_trim_arg<CharT>::value)
{ {
s.remove_prefix(std::min<size_t>(s.find_first_not_of(chars_to_trim), size(s))); s.remove_prefix(std::min<size_t>(s.find_first_not_of(chars_to_trim), size(s)));
return s; return s;
} }
template<typename CharT> template<typename CharT>
inline std::basic_string_view<CharT> right_trim(std::basic_string_view<CharT> s, const std::basic_string_view<CharT> chars_to_trim = default_trim_arg<CharT>()) inline std::basic_string_view<CharT> right_trim(std::basic_string_view<CharT> s, const std::basic_string_view<CharT> chars_to_trim = default_trim_arg<CharT>::value)
{ {
s.remove_suffix(std::min<size_t>(size(s) - s.find_last_not_of(chars_to_trim) - 1, size(s))); s.remove_suffix(std::min<size_t>(size(s) - s.find_last_not_of(chars_to_trim) - 1, size(s)));
return s; return s;
} }
template<typename CharT> template<typename CharT>
inline std::basic_string_view<CharT> trim(std::basic_string_view<CharT> s, const std::basic_string_view<CharT> chars_to_trim = default_trim_arg<CharT>()) inline std::basic_string_view<CharT> trim(std::basic_string_view<CharT> s, const std::basic_string_view<CharT> chars_to_trim = default_trim_arg<CharT>::value)
{ {
return left_trim(right_trim(s, chars_to_trim), chars_to_trim); return left_trim(right_trim(s, chars_to_trim), chars_to_trim);
} }