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#include "jsonParse.h"
#include <cstdlib>
#include <stdexcept>
#include <string>
void
json::jsonParser::LexerError(const char * msg)
{
throw std::runtime_error(msg);
}
void
json::jsonParser::appendEscape(const char * cphs, std::string & str)
{
appendEscape(std::strtoul(cphs + 1, nullptr, 16), str);
}
void
json::jsonParser::appendEscape(unsigned long cp, std::string & str)
{
if (cp <= 0x7F) {
str += static_cast<char>(cp);
}
else if (cp <= 0x7FF) {
str += static_cast<char>((cp >> 6) + 192);
str += static_cast<char>((cp & 63) + 128);
}
else if ((0xd800 <= cp && cp <= 0xdfff) || cp > 0x10FFFF) {
throw std::range_error("Invalid UTF-8 sequence");
}
else if (cp <= 0xFFFF) {
str += static_cast<char>((cp >> 12) + 224);
str += static_cast<char>(((cp >> 6) & 63) + 128);
str += static_cast<char>((cp & 63) + 128);
}
else {
str += static_cast<char>((cp >> 18) + 240);
str += static_cast<char>(((cp >> 12) & 63) + 128);
str += static_cast<char>(((cp >> 6) & 63) + 128);
str += static_cast<char>((cp & 63) + 128);
}
}
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