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#include "logTypes.hpp"
namespace scn {
scan_expected<typename ContextType::iterator>
scanner<WebStat::QuotedString>::scan(WebStat::QuotedString & value, ContextType & ctx)
{
static constexpr auto BS_MAP = []() {
std::array<char, 128> map {};
map['f'] = '\f';
map['n'] = '\n';
map['r'] = '\r';
map['t'] = '\t';
map['v'] = '\v';
map['"'] = '"';
map['\\'] = '\\';
return map;
}();
if (auto empty = scn::scan<>(ctx.range(), R"("")")) {
return empty->begin();
}
auto simple = scn::scan<std::string>(ctx.range(), R"("{:[^\"]}")");
if (simple) {
value = std::move(simple->value());
return simple->begin();
}
if (auto openQuote = scn::scan<>(ctx.range(), R"(")")) {
ctx.advance_to(openQuote->begin());
while (true) {
if (auto closeQuote = scn::scan<>(ctx.range(), R"(")")) {
return closeQuote->begin();
}
if (auto plain = scn::scan<std::string>(ctx.range(), R"({:[^\"]})")) {
value.append(plain->value());
ctx.advance_to(plain->begin());
}
else if (auto hex = scn::scan<unsigned char>(ctx.range(), R"HEX(\x{:.2x})HEX")) {
value.append(1, static_cast<char>(hex->value()));
ctx.advance_to(hex->begin());
}
else if (auto escaped = scn::scan<std::string>(ctx.range(), R"ESC(\{:.1[fnrtv"\]})ESC")) {
value.append(1, BS_MAP[static_cast<unsigned char>(escaped->value().front())]);
ctx.advance_to(escaped->begin());
}
else {
return unexpected(simple.error());
}
}
}
return unexpected(simple.error());
}
scan_expected<typename ContextType::iterator>
scanner<WebStat::QueryString>::scan(WebStat::QueryString & value, ContextType & ctx)
{
if (auto null = scn::scan<>(ctx.range(), R"("")")) {
return null->begin();
}
if (auto empty = scn::scan<>(ctx.range(), R"("?")")) {
value.emplace();
return empty->begin();
}
auto result = scn::scan<std::string>(ctx.range(), R"("?{:[^"]}")");
if (!result) {
return unexpected(result.error());
}
value = std::move(result->value());
return result->begin();
}
scan_expected<typename ContextType::iterator>
scanner<WebStat::CLFString>::scan(WebStat::CLFString & value, ContextType & ctx)
{
if (auto null = scn::scan<>(ctx.range(), R"("-")")) {
return null->begin();
}
return scn::scanner<WebStat::QuotedString> {}.scan(value.emplace(), ctx);
}
}
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