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#include "logTypes.hpp"
namespace scn {
scan_expected<typename ContextType::iterator>
scanner<WebStat::QuotedString>::scan(WebStat::QuotedString & value, ContextType & ctx)
{
if (auto empty = scn::scan<>(ctx.range(), R"("")")) {
return empty->begin();
}
auto result = scn::scan<std::string>(ctx.range(), R"("{:[^"]}")");
if (!result) {
return unexpected(result.error());
}
value = result->value();
return result->begin();
}
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 = result->value();
return result->begin();
}
scan_expected<typename ContextType::iterator>
scanner<WebStat::CLFString>::scan(WebStat::CLFString & value, ContextType & ctx)
{
if (auto empty = scn::scan<>(ctx.range(), R"("")")) {
value.emplace();
return empty->begin();
}
if (auto null = scn::scan<>(ctx.range(), R"("-")")) {
return null->begin();
}
auto result = scn::scan<std::string>(ctx.range(), R"("{:[^"]}")");
if (!result) {
return unexpected(result.error());
}
value = result->value();
decode(*value);
return result->begin();
}
void
scanner<WebStat::CLFString>::decode(std::string & value)
{
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 src = std::ranges::find(value, '\\'); src != value.end()) {
auto dest = src;
while (src != value.cend()) {
if (*src == '\\') {
const std::string_view escaped {++src, value.end()};
if (auto chr = BS_MAP[static_cast<unsigned char>(*src)]) {
*dest++ = chr;
src++;
}
else if (auto hex = scn::scan<unsigned char>(escaped, R"(x{:.2x})")) {
*dest++ = static_cast<char>(hex->value());
src += 3;
}
}
else {
*dest++ = *src++;
}
}
value.erase(dest, value.end());
}
}
}
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