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[struct_json, struct_yaml][feat]support escape during serialization #581

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merged 1 commit into from
Jan 29, 2024
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[struct_json, struct_yaml][feat]support escape during serialization #581

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99 changes: 99 additions & 0 deletions include/ylt/thirdparty/iguana/detail/utf.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,8 @@
#include <cassert>
#include <stdexcept>

#include "iguana/define.h"

namespace iguana {
// https://github.com/Tencent/rapidjson/blob/master/include/rapidjson/reader.h
template <typename Ch = char, typename It>
Expand Down Expand Up @@ -48,4 +50,101 @@ inline void encode_utf8(OutputStream &os, unsigned codepoint) {
os.push_back(static_cast<Ch>(0x80 | (codepoint & 0x3F)));
}
}

// https://github.com/Tencent/rapidjson/blob/master/include/rapidjson/encodings.h
static inline unsigned char GetRange(unsigned char c) {
static const unsigned char type[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0x10, 0x10, 0x10, 0x10,
0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,
0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
0x40, 0x40, 0x40, 0x40, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 10, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3,
11, 6, 6, 6, 5, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8,
};
return type[c];
}

// https://github.com/Tencent/rapidjson/blob/master/include/rapidjson/encodings.h
template <typename Ch = char, typename It>
inline bool decode_utf8(It &&it, unsigned &codepoint) {
auto c = *(it++);
bool result = true;
auto copy = [&]() IGUANA__INLINE_LAMBDA {
c = *(it++);
codepoint = (codepoint << 6) | (static_cast<unsigned char>(c) & 0x3Fu);
};
auto trans = [&](unsigned mask) IGUANA__INLINE_LAMBDA {
result &= ((GetRange(static_cast<unsigned char>(c)) & mask) != 0);
};
auto tail = [&]() IGUANA__INLINE_LAMBDA {
copy();
trans(0x70);
};
if (!(c & 0x80)) {
codepoint = static_cast<unsigned char>(c);
return true;
}
unsigned char type = GetRange(static_cast<unsigned char>(c));
if (type >= 32) {
codepoint = 0;
}
else {
codepoint = (0xFFu >> type) & static_cast<unsigned char>(c);
}
switch (type) {
case 2:
tail();
return result;
case 3:
tail();
tail();
return result;
case 4:
copy();
trans(0x50);
tail();
return result;
case 5:
copy();
trans(0x10);
tail();
tail();
return result;
case 6:
tail();
tail();
tail();
return result;
case 10:
copy();
trans(0x20);
tail();
return result;
case 11:
copy();
trans(0x60);
tail();
tail();
return result;
default:
return false;
}
}

} // namespace iguana
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