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37 lines
1.3 KiB
C++
37 lines
1.3 KiB
C++
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#include <console/ConsoleUtils.h>
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#include <TiltedCore/Stl.hpp>
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namespace Console
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{
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bool CheckIsValidUTF8(const TiltedPhoques::String& string)
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{
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size_t c, i, ix, n, j;
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for (i = 0, ix = string.length(); i < ix; i++)
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{
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c = static_cast<unsigned char>(string[i]);
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// if (c==0x09 || c==0x0a || c==0x0d || (0x20 <= c && c <= 0x7e) ) n = 0; // is_printable_ascii
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if (0x00 <= c && c <= 0x7f)
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n = 0; // 0bbbbbbb
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else if ((c & 0xE0) == 0xC0)
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n = 1; // 110bbbbb
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else if (c == 0xed && i < (ix - 1) && (static_cast<unsigned char>(string[i + 1]) & 0xa0) == 0xa0)
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return false; // U+d800 to U+dfff
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else if ((c & 0xF0) == 0xE0)
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n = 2; // 1110bbbb
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else if ((c & 0xF8) == 0xF0)
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n = 3; // 11110bbb
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// else if (($c & 0xFC) == 0xF8) n=4; // 111110bb //byte 5, unnecessary in 4 byte UTF-8
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// else if (($c & 0xFE) == 0xFC) n=5; // 1111110b //byte 6, unnecessary in 4 byte UTF-8
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else
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return false;
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for (j = 0; j < n && i < ix; j++)
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{ // n bytes matching 10bbbbbb follow ?
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if ((++i == ix) || ((static_cast<unsigned char>(string[i]) & 0xC0) != 0x80))
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return false;
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}
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}
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return true;
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}
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} // namespace Console
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