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Escape control characters in keys

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Previously a key like:

        "a\u0000\u0001b" = 1

Would get written with literal control characters, rather than escapes:

        "a<00><01>b" = 1

The "valid/key/quoted-unicode" test from toml-test would fail with this,
although it seems they're not run automatically(?)

Can also reproduce with something like:

        % cat test.cpp
        #include <toml.hpp>
        #include <iostream>

        int main()
        {
                const auto data  = toml::parse("test.toml");
                std::cout << data << "\n";
                return 0;
        }

        % cat test.toml
        "a\u0000\u0001b" = "a\u0000\u0001b"

        % c++ -I. test.cpp

        % ./a.out
        "ab" = "a\u0000\u0001b"

        % ./a.out | hexdump -C
        00000000  22 61 00 01 62 22 20 3d  20 22 61 5c 75 30 30 30  |"a..b" = "a\u000|
        00000010  30 5c 75 30 30 30 31 62  22 0a 0a                 |0\u0001b"..|
This commit is contained in:
Martin Tournoij 2023-10-10 09:03:33 +01:00
parent 087408a8fb
commit d2937ff4e1
No known key found for this signature in database
1 changed files with 13 additions and 1 deletions
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14
toml/serializer.hpp
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@ -63,7 +63,19 @@ format_key(const std::basic_string<charT, traits, Alloc>& k)
case '\f': {serialized += "\\f"; break;}
case '\n': {serialized += "\\n"; break;}
case '\r': {serialized += "\\r"; break;}
default : {serialized += c; break;}
default: {
if (c >= 0x00 && c < 0x20)
{
std::array<char, 7> buf;
std::snprintf(buf.data(), buf.size(), "\\u00%02x", static_cast<int>(c));
serialized += buf.data();
}
else
{
serialized += c;
}
break;
}
}
}
serialized += "\"";