engine: common: net_buffer: add MSG_WriteStringf wrapper

engine/common/net_buffer.c

@@ -452,6 +452,18 @@ qboolean MSG_WriteString( sizebuf_t *sb, const char *pStr )
 	return !sb->bOverflow;
 }
 
+qboolean MSG_WriteStringf( sizebuf_t *sb, const char *format, ... )
+{
+	va_list va;
+	char buf[MAX_VA_STRING];
+
+	va_start( va, format );
+	Q_vsnprintf( buf, sizeof( buf ), format, va );
+	va_end( va );
+
+	return MSG_WriteString( sb, buf );
+}
+
 int MSG_ReadOneBit( sizebuf_t *sb )
 {
 	if( !MSG_Overflow( sb, 1 ))

engine/common/net_buffer.h

@@ -102,6 +102,7 @@ void MSG_WriteVec3Coord( sizebuf_t *sb, const float *fa );
 void MSG_WriteVec3Angles( sizebuf_t *sb, const float *fa );
 qboolean MSG_WriteBytes( sizebuf_t *sb, const void *pBuf, int nBytes );	// same as MSG_WriteData
 qboolean MSG_WriteString( sizebuf_t *sb, const char *pStr );		// returns false if it overflows the buffer.
+qboolean MSG_WriteStringf( sizebuf_t *sb, const char *format, ... ) _format( 2 );
 
 // helper functions
 _inline int MSG_GetNumBytesWritten( sizebuf_t *sb ) { return BitByte( sb->iCurBit ); }