1 files changed, 40 insertions, 2 deletions
diff --git a/library.cpp b/library.cpp
index 29e50db..cee789e 100644
--- a/library.cpp
+++ b/library.cpp
@@ -1,4 +1,7 @@
+#define _GNU_SOURCE //vasprintf
 #include <iostream>
+#include <cstdarg>
+#include <cassert>
 #include "global.h"
 #include "library.h"
 #include "main.h"
@@ -6,10 +9,45 @@
 using namespace std;
 
 
+static void draw_text(int x,int y,const char *s,size_t len){
+	fl_draw(s,len,x,y);
+}
+
 void draw_text(int x,int y,const char *s){
-	fl_draw(s,x,y);
+	draw_text(x,y,s,strlen(s));
+}
+
+__attribute__((format (printf, 3, 4)))
+void draw_textf(int x,int y,const char *format,...){
+	va_list ap;
+	va_start(ap,format);
+	char *buf;
+	int len=vasprintf(&buf,format,ap);
+	va_end(ap);
+	assert(len>=0);
+	draw_text(x,y,buf,len);
+	free(buf);
+}
+
+
+static void log(const char *buf,size_t len){
+	cerr<<"[LOG] ";
+	cerr.write(buf,len);
+	cerr<<endl;
 }
 
 void log(const char *s){
-	cerr<<"[LOG] "<<s<<endl;
+	log(s,strlen(s));
+}
+
+__attribute__((format (printf, 1, 2)))
+void logf(const char *format,...){
+	va_list ap;
+	va_start(ap,format);
+	char *buf;
+	int len=vasprintf(&buf,format,ap);
+	va_end(ap);
+	assert(len>=0);
+	log(buf,len);
+	free(buf);
 }