From 52b3cd46c76fd4be18aeb8422a08a073484b9fad Mon Sep 17 00:00:00 2001
From: Rutger Broekhoff
Date: Sat, 29 Aug 2026 12:01:42 +0200
Subject: More module implementation partition units

---
 server/src/trace.cppm | 72 +++++----------------------------------------------
 1 file changed, 6 insertions(+), 66 deletions(-)

(limited to 'server/src/trace.cppm')

diff --git a/server/src/trace.cppm b/server/src/trace.cppm
index 35d32f3..deb84a0 100644
--- a/server/src/trace.cppm
+++ b/server/src/trace.cppm
@@ -1,9 +1,3 @@
-module;
-
-// Might as well since we're using OpenSSL
-#include <openssl/err.h>
-#include <openssl/rand.h>
-
 export module routemon:trace;
 
 import std;
@@ -13,64 +7,13 @@ namespace routemon::trace {
 
 class uuid7
 {
-  std::uint64_t high_ = 0;
-  std::uint64_t low_ = 0;
+  std::uint64_t hi_ = 0;
+  std::uint64_t lo_ = 0;
 
 public:
-  uuid7()
-  {
-    namespace chrono = std::chrono;
-    auto const unix_time_ms_signed = static_cast<std::int64_t>(
-        chrono::duration_cast<chrono::milliseconds>(
-            chrono::system_clock::now().time_since_epoch())
-            .count());
-    if (unix_time_ms_signed < 0)
-      throw std::runtime_error{"system time before UNIX epoch"};
-    auto const unix_time_ms = static_cast<std::uint64_t>(unix_time_ms_signed);
-    if (std::countl_zero(unix_time_ms) < 16)
-      throw std::runtime_error{"system time too great"};
-
-    auto rand = std::array<unsigned char, 10>{};
-    int s = RAND_bytes(rand.data(), static_cast<int>(rand.size()));
-    if (s != 1)
-    {
-      unsigned long e = ERR_get_error();
-      throw std::runtime_error{std::format(
-          "failed to generate UUID(v7): {} ({}, code {})",
-          ERR_reason_error_string(e), ERR_lib_error_string(e), e)};
-    }
-
-    auto version = std::uint64_t{0b0111};
-    auto variant = std::uint64_t{0b10};
-
-    high_ |= unix_time_ms << 16;
-    high_ |= version << 12;
-    high_ |= std::uint64_t{rand[0]} << 4;
-    high_ |= std::uint64_t{rand[1]};
-    low_ |= variant << 62;
-    low_ |= std::uint64_t{rand[2]} << 54;
-    low_ |= std::uint64_t{rand[3]} << 48;
-    low_ |= std::uint64_t{rand[4]} << 40;
-    low_ |= std::uint64_t{rand[5]} << 32;
-    low_ |= std::uint64_t{rand[6]} << 24;
-    low_ |= std::uint64_t{rand[7]} << 16;
-    low_ |= std::uint64_t{rand[8]} << 8;
-    low_ |= std::uint64_t{rand[9]};
-  }
-
-  auto format(std::array<char, 37>& target) -> void
-  {
-    auto high_high = (high_ & 0xffff'ffff'0000'0000) >> 32;
-    auto high_low_high = (high_ & 0x0000'0000'ffff'0000) >> 16;
-    auto low_low_high = (high_ & 0x0000'0000'0000'ffff) >> 0;
-    auto high_low = (low_ & 0xffff'0000'0000'0000) >> 48;
-    auto low_low = (low_ & 0x0000'ffff'ffff'ffff) >> 0;
+  uuid7();
 
-    std::format_to(
-        target.begin(), "{:0>8x}-{:0>4x}-{:0>4x}-{:0>4x}-{:0>12x}", high_high,
-        high_low_high, low_low_high, high_low, low_low);
-    target.back() = '\0';
-  }
+  auto format(std::array<char, 37>& target) -> void;
 };
 
 export class id
@@ -78,12 +21,9 @@ export class id
   std::array<char, 37> chars_;
 
 public:
-  id() { uuid7{}.format(chars_); }
+  id();
 
-  auto as_string() const -> util::zstring_view
-  {
-    return util::zstring_view{chars_.data(), chars_.size() - 1};
-  }
+  auto as_string() const -> util::zstring_view;
 };
 
 } // namespace routemon::trace
-- 
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