Implement logging

1 files changed, 52 insertions, 0 deletions

diff --git a/asl/log/log.cpp b/asl/log/log.cpp
index e69de29..cd5d287 100644
--- a/asl/log/log.cpp
+++ b/asl/log/log.cpp
@@ -0,0 +1,52 @@
+#include "asl/log/log.hpp"
+#include "asl/print.hpp"
+#include "asl/string_builder.hpp"
+
+// @Todo Don't use internal get_stdout_writer, make console module
+
+static asl::log::DefaultLogger g_default_logger{asl::print_internals::get_stdout_writer()};
+static asl::log::Logger* g_head = &g_default_logger;
+
+static constexpr asl::string_view kLevelName[] = {
+    "  DEBUG  ",
+    "  INFO   ",
+    " WARNING ",
+    "  ERROR  ",
+};
+
+void asl::log::register_logger(box<Logger> logger_box)
+{
+    auto* logger = leak(ASL_MOVE(logger_box));
+    logger->m_next = exchange(g_head, logger);
+}
+
+void asl::log::DefaultLogger::log(const message& msg)
+{
+    asl::format(m_writer, "[{}] {}:{}: {}\n",
+        kLevelName[msg.level], // NOLINT
+        msg.location.file,
+        msg.location.line,
+        msg.message);
+}
+
+void asl::log::log_inner(
+    level l,
+    string_view fmt, span<const format_internals::type_erased_arg> args,
+    const source_location& sl)
+{
+    // @Todo Use temporary allocator
+    StringWriter msg_writer{};
+    asl::format_internals::format(&msg_writer, fmt, args);
+
+    message m{
+        .level = l,
+        .message = msg_writer.as_string_view(),
+        .location = sl,
+    };
+
+    for (auto* it = g_head; it != nullptr; it = it->next_logger())
+    {
+        it->log(m);
+    }
+}
+