88 lines
1.8 KiB
C++
88 lines
1.8 KiB
C++
#ifndef unicode_hh_INCLUDED
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#define unicode_hh_INCLUDED
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#include <cwctype>
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#include <cwchar>
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#include <locale>
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#include "units.hh"
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namespace Kakoune
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{
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using Codepoint = char32_t;
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inline bool is_eol(Codepoint c) noexcept
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{
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return c == '\n';
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}
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inline bool is_horizontal_blank(Codepoint c) noexcept
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{
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return c == ' ' or c == '\t';
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}
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inline bool is_blank(Codepoint c) noexcept
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{
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return c == ' ' or c == '\t' or c == '\n';
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}
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enum WordType { Word, WORD };
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template<WordType word_type = Word>
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inline bool is_word(Codepoint c) noexcept
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{
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return c == '_' or iswalnum((wchar_t)c);
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}
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template<>
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inline bool is_word<WORD>(Codepoint c) noexcept
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{
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return not is_blank(c);
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}
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inline bool is_punctuation(Codepoint c) noexcept
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{
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return not (is_word(c) or is_blank(c));
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}
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inline bool is_basic_alpha(Codepoint c) noexcept
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{
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return (c >= 'a' and c <= 'z') or (c >= 'A' and c <= 'Z');
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}
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inline ColumnCount codepoint_width(Codepoint c) noexcept
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{
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return c == '\n' ? 1 : wcwidth((wchar_t)c);
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}
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enum class CharCategories
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{
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Blank,
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EndOfLine,
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Word,
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Punctuation,
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};
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template<WordType word_type = Word>
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inline CharCategories categorize(Codepoint c) noexcept
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{
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if (is_eol(c))
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return CharCategories::EndOfLine;
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if (is_horizontal_blank(c))
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return CharCategories::Blank;
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if (word_type == WORD or is_word(c))
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return CharCategories::Word;
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return CharCategories::Punctuation;
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}
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inline Codepoint to_lower(Codepoint cp) noexcept { return towlower((wchar_t)cp); }
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inline Codepoint to_upper(Codepoint cp) noexcept { return towupper((wchar_t)cp); }
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inline char to_lower(char c) noexcept { return c >= 'A' and c <= 'Z' ? c - 'A' + 'a' : c; }
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inline char to_upper(char c) noexcept { return c >= 'a' and c <= 'z' ? c - 'a' + 'A' : c; }
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}
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#endif // unicode_hh_INCLUDED
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