lokinet/llarp/util/json.cpp

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#include "json.hpp"
#include <cstring>
#include <string>
#include <vector>
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namespace llarp
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{
namespace json
{
struct NlohmannJSONParser : public IParser
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{
NlohmannJSONParser(size_t contentSize) : m_Buf(contentSize + 1), m_Offset(0)
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{
assert(contentSize != 0);
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}
std::vector<char> m_Buf;
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size_t m_Offset;
bool
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FeedData(const char* buf, size_t sz) override
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{
if (sz == 0)
return true;
if (m_Offset + sz > m_Buf.size() - 1)
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return false;
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std::copy_n(buf, sz, m_Buf.data() + m_Offset);
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m_Offset += sz;
m_Buf[m_Offset] = 0;
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return true;
}
Result
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Parse(nlohmann::json& obj) const override
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{
if (m_Offset < m_Buf.size() - 1)
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return eNeedData;
try
{
obj = nlohmann::json::parse(m_Buf.data());
return eDone;
}
catch (const nlohmann::json::exception&)
{
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return eParseError;
}
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}
};
IParser*
MakeParser(size_t contentSize)
{
return new NlohmannJSONParser(contentSize);
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}
} // namespace json
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} // namespace llarp