From f3ba19b162a89b2081c0598b4a0bf126146e3671 Mon Sep 17 00:00:00 2001
From: Steven Le Rouzic <steven.lerouzic@gmail.com>
Date: Thu, 4 Apr 2024 22:05:06 +0200
Subject: Add logging system

---
 deimos/core/log.cpp | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 deimos/core/log.cpp

(limited to 'deimos/core/log.cpp')

diff --git a/deimos/core/log.cpp b/deimos/core/log.cpp
new file mode 100644
index 0000000..befe4b7
--- /dev/null
+++ b/deimos/core/log.cpp
@@ -0,0 +1,82 @@
+#include "deimos/core/log.h"
+#include "deimos/core/api_registry.h"
+#include "deimos/core/allocator.h"
+#include "deimos/core/os.h"
+
+namespace deimos
+{
+
+class DefaultLogger : public ILogger
+{
+    OsConsoleWriter m_writer;
+
+    static const char* SeverityToStr(LogSeverity s)
+    {
+        switch (s)
+        {
+            case LogSeverity::kInfo: return "INFO ";
+            case LogSeverity::kDebug: return "DEBUG";
+            case LogSeverity::kError: return "ERROR";
+        }
+    }
+
+    static const char* SeverityToColor(LogSeverity s)
+    {
+        switch (s)
+        {
+            case LogSeverity::kInfo: return "";
+            case LogSeverity::kDebug: return "\033[2m";
+            case LogSeverity::kError: return "\033[91m";
+        }
+    }
+
+public:
+    explicit DefaultLogger(OsConsoleApi* os_console_api) :
+        m_writer(os_console_api, OsConsoleType::kStdOut)
+    {}
+
+    // @Todo Use string views
+    void Log(LogSeverity severity, const SourceLocation& location, Span<const char> msg) override
+    {
+        Format(&m_writer, "$[ $ ] $:$: $\033[0m\n", SeverityToColor(severity),
+            SeverityToStr(severity), location.file, location.line, msg);
+    }
+};
+
+class LogApiImpl : public LogApi
+{
+    ILogger* m_default_logger;
+
+public:
+    explicit LogApiImpl(ILogger* default_logger) :
+        m_default_logger{default_logger}
+    {}
+
+    void LogVa(
+        LogSeverity severity,
+        const SourceLocation& location,
+        gsl::czstring msg,
+        Span<const FormatArg> args) override
+    {
+        std::byte buffer[1024];
+        BufferWriter message_writer({&buffer[0], 1024});
+        FormatVa(&message_writer, msg, args);
+
+        auto written = message_writer.GetWritten();
+        m_default_logger->Log(severity, location, {(const char*)written.data(), written.size()});
+    }
+};
+
+void RegisterLogApi(ApiRegistry* api_registry)
+{
+    auto* allocator = api_registry->Get<AllocatorApi>()->system;
+    auto* os_console_api = api_registry->Get<OsApi>()->console;
+
+    auto* default_logger = allocator->New<DefaultLogger>(os_console_api);
+    auto* log_api = allocator->New<LogApiImpl>(default_logger);
+
+    api_registry->Set(log_api);
+}
+
+} // namespace deimos
+
-- 
cgit