log.cpp

#include <userver/utils/log.hpp>

#include <fmt/compile.h>
#include <fmt/format.h>

#include <userver/utils/encoding/hex.hpp>
#include <userver/utils/text_light.hpp>

USERVER_NAMESPACE_BEGIN

namespace utils::log {

std::string ToLimitedHex(std::string_view data, size_t limit) {
    // string of length X will produce hex of length 2*X
    limit /= 2;

    if (data.size() <= limit) {
        return utils::encoding::ToHex(data);
    } else {
        auto truncated = utils::encoding::ToHex(data.data(), limit);
        return fmt::format(FMT_COMPILE("{}...(truncated, total {} bytes)"), std::string_view{truncated}, data.size());
    }
}

std::string ToLimitedUtf8(std::string_view data, size_t limit) {
    if (data.size() <= limit) {
        if (utils::text::IsUtf8(data)) {
            return std::string{data};
        } else {
            return fmt::format(FMT_COMPILE("<Non utf-8, total {} bytes>"), data.size());
        }
    }

    auto view = std::string_view{data.data(), limit};
    utils::text::utf8::TrimViewTruncatedEnding(view);
    if (utils::text::IsUtf8(view)) {
        return fmt::format(FMT_COMPILE("{}...(truncated, total {} bytes)"), view, data.size());
    } else {
        return fmt::format(FMT_COMPILE("<Non utf-8, total {} bytes>"), data.size());
    }
}

}  // namespace utils::log

USERVER_NAMESPACE_END