1 files changed, 68 insertions, 0 deletions
diff --git a/miniany/libc-freestanding.c b/miniany/libc-freestanding.c
index b4e48f8..8b1a378 100644
--- a/miniany/libc-freestanding.c
+++ b/miniany/libc-freestanding.c
@@ -6,6 +6,8 @@
  * 
  */
 
+#include <stddef.h>
+
 int strlen( char *s )
 {
 	char *p;
@@ -139,6 +141,72 @@ int putchar( int c )
 	return c;
 }
 
+static void strreverse( char *s )
+{
+	char *end = s + strlen( s ) - 1;
+	
+	while( s < end ) {
+		*s ^= *end;
+		*end ^= *s;
+		*s ^= *end;
+		s++;
+		end--;
+	}
+}
+    
+char *itoa( int v, char *s, int base )
+{
+	static char digit[] = "0123456789ABCDEF";
+	int sign = 0;
+	char *p = s;
+	
+	if( base < 2 || base > 16 ) {
+		return NULL;
+	}
+	
+	if( v < 0 ) {
+		v = -v;
+		sign = 1;
+	} 
+	
+	do {
+		*p++ = digit[v % base];
+	} while( ( v /= base ) > 0 );
+
+	if( sign ) {
+		*p++ = '-';
+	}
+	*p = '\0';
+	
+	strreverse( s );
+	
+	return s;
+}
+
+int putint( int i )
+{
+	char buf[17];
+
+	itoa( i, buf, 10 );
+	print_string( buf );
+
+	return i;
+}
+
+int putstring( char *s )
+{
+	print_string( s );
+	
+	return 0;
+}
+
+int putnl( )
+{
+	putchar( '\n' );
+	
+	return 0;
+}
+
 void exit( int status )
 {
 	syscall1( SYSCALL_EXIT, status );