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40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
#include "formid.hpp"
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#include <charconv>
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#include <cstring>
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std::string ESM::FormId::toString(std::string_view prefix) const
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{
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std::string res;
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res.resize(prefix.length() + 20);
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std::memcpy(res.data(), prefix.data(), prefix.size());
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char* buf = res.data() + prefix.size();
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uint64_t value;
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if (hasContentFile())
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{
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if ((mIndex & 0xff000000) != 0)
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throw std::invalid_argument("Invalid FormId index value: " + std::to_string(mIndex));
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value = mIndex | (static_cast<uint64_t>(mContentFile) << 24);
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}
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else
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{
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*(buf++) = '@';
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value = mIndex | (static_cast<uint64_t>(-mContentFile - 1) << 32);
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}
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*(buf++) = '0';
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*(buf++) = 'x';
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const auto r = std::to_chars(buf, res.data() + res.size(), value, 16);
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if (r.ec != std::errc())
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throw std::system_error(std::make_error_code(r.ec), "ESM::FormId::toString failed");
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res.resize(r.ptr - res.data());
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return res;
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}
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uint32_t ESM::FormId::toUint32() const
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{
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if (isSet() && !hasContentFile())
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throw std::runtime_error("Generated FormId can not be converted to 32bit format");
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if (mContentFile > 0xfe)
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throw std::runtime_error("FormId with mContentFile > 0xFE can not be converted to 32bit format");
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return (mIndex & 0xffffff) | ((hasContentFile() ? mContentFile : 0xff) << 24);
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}
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