From dc5774a69874734e9d32b0a2a94b6debd8f9579c Mon Sep 17 00:00:00 2001
From: nillerusr <nillerusr@gmail.com>
Date: Wed, 6 Jul 2022 18:17:09 +0300
Subject: [PATCH] add debug logger

---
 launcher/launcher.cpp |  3 ++
 public/tier0/dbg.h    |  8 ++++
 tier0/dbg.cpp         | 86 +++++++++++++++++++++++++++++++++++++++----
 3 files changed, 90 insertions(+), 7 deletions(-)

diff --git a/launcher/launcher.cpp b/launcher/launcher.cpp
index 217db87c..a814ec4c 100644
--- a/launcher/launcher.cpp
+++ b/launcher/launcher.cpp
@@ -765,6 +765,9 @@ bool CSourceAppSystemGroup::Create()
 
 bool CSourceAppSystemGroup::PreInit()
 {
+	if ( !CommandLine()->FindParm( "-nolog" ) )
+		DebugLogger()->Init("engine.log");
+
 	CreateInterfaceFn factory = GetFactory();
 	ConnectTier1Libraries( &factory, 1 );
 	ConVar_Register( );
diff --git a/public/tier0/dbg.h b/public/tier0/dbg.h
index 1fff938c..9f2c734b 100644
--- a/public/tier0/dbg.h
+++ b/public/tier0/dbg.h
@@ -48,6 +48,14 @@
 
 class Color;
 
+class IDbgLogger
+{
+public:
+	virtual void Init(const char *logfile) = 0;
+	virtual void Write(const char *data) = 0;
+};
+
+PLATFORM_INTERFACE IDbgLogger *DebugLogger();
 
 //-----------------------------------------------------------------------------
 // Usage model for the Dbg library
diff --git a/tier0/dbg.cpp b/tier0/dbg.cpp
index 9d64da4a..b7a39383 100644
--- a/tier0/dbg.cpp
+++ b/tier0/dbg.cpp
@@ -49,11 +49,82 @@
 // memdbgon must be the last include file in a .cpp file!!!
 #include "tier0/memdbgon.h"
 
+class CDbgLogger : public IDbgLogger
+{
+public:
+	CDbgLogger();
+	~CDbgLogger();
+
+	void Init(const char *logfile);
+	void Write(const char *data);
+
+private:
+	FILE *file;
+	float flStartTime;
+	bool bShouldLog;
+};
+
+
+CDbgLogger::CDbgLogger()
+{
+	bShouldLog = false;
+	flStartTime = Plat_FloatTime();
+}
+
+void CDbgLogger::Init(const char *logfile)
+{
+	time_t timeCur;
+	struct tm tmStruct;
+
+	char szTime[256];
+
+	bShouldLog = true;
+
+	time( &timeCur );
+	Plat_gmtime( &timeCur, &tmStruct );
+	Plat_ctime( &timeCur, szTime, sizeof(szTime) );
+
+	file = fopen(logfile, "w+");
+	fprintf(file, ">>> Engine started at %s\n", szTime);
+	fflush(file);
+}
+
+CDbgLogger::~CDbgLogger()
+{
+	if( !bShouldLog )
+		return;
+
+	time_t timeCur;
+	struct tm tmStruct;
+
+	char szTime[256];
+
+	time( &timeCur );
+	Plat_gmtime( &timeCur, &tmStruct );
+	Plat_ctime( &timeCur, szTime, sizeof(szTime) );
+
+	fprintf(file, "\n>>> Engine closed at %s\n", szTime);
+	fclose(file);
+}
+
+void CDbgLogger::Write(const char *data)
+{
+	if( !bShouldLog )
+		return;
+
+	fprintf(file, "[%.4f] ", Plat_FloatTime() - flStartTime);
+	fprintf(file, "%s", data);
+	fflush(file);
+}
+
+static CDbgLogger g_DbgLogger;
+IDbgLogger *DebugLogger() { return &g_DbgLogger; }
+
 //-----------------------------------------------------------------------------
 // internal structures
 //-----------------------------------------------------------------------------
-enum 
-{ 
+enum
+{
 	MAX_GROUP_NAME_LENGTH = 48 
 };
 
@@ -275,7 +346,7 @@ DBG_INTERFACE void  _SpewInfo( SpewType_t type, const tchar* pFile, int line )
 
 static SpewRetval_t _SpewMessage( SpewType_t spewType, const char *pGroupName, int nLevel, const Color *pColor, const tchar* pMsgFormat, va_list args )
 {
-	tchar pTempBuffer[5020];
+	tchar pTempBuffer[8192];
 
 	assert( _tcslen( pMsgFormat ) < sizeof( pTempBuffer) ); // check that we won't artifically truncate the string
 
@@ -288,7 +359,7 @@ static SpewRetval_t _SpewMessage( SpewType_t spewType, const char *pGroupName, i
 
 	if ( len == -1 )
 		return SPEW_ABORT;
-	
+
 	/* Create the message.... */
 	int val= _vsntprintf( &pTempBuffer[len], sizeof( pTempBuffer ) - len - 1, pMsgFormat, args );
 	if ( val == -1 )
@@ -302,10 +373,10 @@ static SpewRetval_t _SpewMessage( SpewType_t spewType, const char *pGroupName, i
 	{
 		len += _stprintf( &pTempBuffer[len], _T("\n") ); 
 	}
-	
+
 	assert( len < sizeof(pTempBuffer)/sizeof(pTempBuffer[0]) - 1 ); /* use normal assert here; to avoid recursion. */
 	assert( s_SpewOutputFunc );
-	
+
 	/* direct it to the appropriate target(s) */
 	SpewRetval_t ret;
 	assert( g_pSpewInfo == NULL );
@@ -317,8 +388,9 @@ static SpewRetval_t _SpewMessage( SpewType_t spewType, const char *pGroupName, i
 	};
 
 #ifdef ANDROID
-    __android_log_print( ANDROID_LOG_INFO, "SRCENG", "%s", pTempBuffer );
+	__android_log_print( ANDROID_LOG_INFO, "SRCENG", "%s", pTempBuffer );
 #endif
+	g_DbgLogger.Write( pTempBuffer );
 
 	g_pSpewInfo = &spewInfo;
 	ret = s_SpewOutputFunc( spewType, pTempBuffer );