From faed79c653c53d749b70825de7d47ac7c9a39f1a Mon Sep 17 00:00:00 2001
From: Henrik Hautakoski <henrik.hautakoski@gmail.com>
Date: Sat, 18 Feb 2023 13:54:57 +0100
Subject: [PATCH] Spectre/System/Log: Support Writer interface.

---
 include/Spectre/System/Log.h |  6 ++++++
 source/System/Log.cpp        | 18 ++++++++++++++----
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/include/Spectre/System/Log.h b/include/Spectre/System/Log.h
index 51c0e14..b1adc0a 100644
--- a/include/Spectre/System/Log.h
+++ b/include/Spectre/System/Log.h
@@ -7,6 +7,8 @@
 
 namespace sp {
 
+namespace log { class Writer; }
+
 class Log
 {
 public :
@@ -18,6 +20,8 @@ public :
 		T_DEBUG		= 1 << 3
 	};
 
+	static void setWriter(log::Writer* writer);
+
 	static void info(const char *format, ...);
 
 	static void warn(const char *format, ...);
@@ -29,6 +33,8 @@ public :
 private :
 
 	static void writeln(Type type, const char *fmt, va_list args);
+
+	static log::Writer* _writer;
 };
 
 } // namespace sp
diff --git a/source/System/Log.cpp b/source/System/Log.cpp
index 52bfe92..b2d9226 100644
--- a/source/System/Log.cpp
+++ b/source/System/Log.cpp
@@ -2,10 +2,18 @@
 #include <string>
 #include <stdarg.h>
 #include <Spectre/System/Log.h>
+#include <Spectre/System/Log/Writer.h>
 
 namespace sp
 {
 
+log::Writer* Log::_writer;
+
+void Log::setWriter(log::Writer* writer)
+{
+	_writer = writer;
+}
+
 void Log::info(const char *format, ...) {
 
 	va_list vl;
@@ -48,13 +56,13 @@ void Log::debug(const char *format, ...)
 
 void Log::writeln(Type type, const char *format, va_list args)
 {
-	FILE *fd = stderr;
+	int len;
+	static char msg[4096];
 	static char buf[4096];
 	const char *prefix;
 
 	switch(type) {
 	case T_INFO :
-		fd = stdout;
 		prefix = "INFO";
 		break;
 	case T_WARNING :
@@ -73,8 +81,10 @@ void Log::writeln(Type type, const char *format, va_list args)
 		break;
 	}
 
-	vsnprintf(buf, sizeof(buf), format, args);
-	fprintf(fd, "%s: %s\n", prefix, buf);
+	vsnprintf(msg, sizeof(msg), format, args);
+	len = sprintf(buf, "%s: %s\n", prefix, msg);
+
+	_writer->write(buf, len);
 }
 
 } // namespace sp