110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
#pragma once
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#pragma once
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#include <fig_string.hpp>
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#include <string>
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#include <locale>
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#include <cwctype>
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#include <vector>
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#include <algorithm>
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namespace Fig::Utils
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{
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inline std::u32string utf8ToUtf32(const FString &s)
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{
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std::u32string result;
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size_t i = 0;
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while (i < s.size())
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{
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char32_t codepoint = 0;
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unsigned char c = static_cast<unsigned char>(s[i]);
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if (c < 0x80)
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{
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codepoint = c;
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i += 1;
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}
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else if ((c >> 5) == 0x6)
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{
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codepoint = ((c & 0x1F) << 6) | (static_cast<unsigned char>(s[i + 1]) & 0x3F);
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i += 2;
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}
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else if ((c >> 4) == 0xE)
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{
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codepoint = ((c & 0x0F) << 12) | ((static_cast<unsigned char>(s[i + 1]) & 0x3F) << 6) | (static_cast<unsigned char>(s[i + 2]) & 0x3F);
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i += 3;
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}
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else if ((c >> 3) == 0x1E)
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{
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codepoint = ((c & 0x07) << 18) | ((static_cast<unsigned char>(s[i + 1]) & 0x3F) << 12) | ((static_cast<unsigned char>(s[i + 2]) & 0x3F) << 6) | (static_cast<unsigned char>(s[i + 3]) & 0x3F);
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i += 4;
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}
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else
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{
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i += 1; // 跳过非法字节
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continue;
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}
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result.push_back(codepoint);
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}
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return result;
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}
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inline FString utf32ToUtf8(const std::u32string &s)
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{
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FString result;
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for (char32_t cp : s)
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{
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if (cp < 0x80)
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{
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result.push_back(static_cast<char8_t>(cp));
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}
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else if (cp < 0x800)
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{
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result.push_back(static_cast<char8_t>((cp >> 6) | 0xC0));
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result.push_back(static_cast<char8_t>((cp & 0x3F) | 0x80));
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}
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else if (cp < 0x10000)
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{
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result.push_back(static_cast<char8_t>((cp >> 12) | 0xE0));
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result.push_back(static_cast<char8_t>(((cp >> 6) & 0x3F) | 0x80));
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result.push_back(static_cast<char8_t>((cp & 0x3F) | 0x80));
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}
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else
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{
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result.push_back(static_cast<char8_t>((cp >> 18) | 0xF0));
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result.push_back(static_cast<char8_t>(((cp >> 12) & 0x3F) | 0x80));
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result.push_back(static_cast<char8_t>(((cp >> 6) & 0x3F) | 0x80));
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result.push_back(static_cast<char8_t>((cp & 0x3F) | 0x80));
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}
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}
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return result;
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}
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inline FString toLower(const FString &s)
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{
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std::u32string u32 = utf8ToUtf32(s);
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std::locale loc("");
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for (auto &ch : u32)
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{
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ch = std::towlower(ch);
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}
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return utf32ToUtf8(u32);
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}
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inline FString toUpper(const FString &s)
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{
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std::u32string u32 = utf8ToUtf32(s);
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std::locale loc("");
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for (auto &ch : u32)
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{
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ch = std::towupper(ch);
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}
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return utf32ToUtf8(u32);
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}
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template <class T>
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bool vectorContains(const T &t, const std::vector<T> v)
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{
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return std::find(v.begin(), v.end(), t) != v.end();
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}
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} // namespace Fig::Utils
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