7 files changed, 73 insertions, 4 deletions
diff --git a/lib/io/Makefile b/lib/io/Makefile
new file mode 100644
index 0000000..e60a656
--- /dev/null
+++ b/lib/io/Makefile
@@ -0,0 +1,3 @@
+unit_test:
+	gcc io.c ../cstr/cstr.c ../sys/start.S -o test -static -nostdlib -fno-stack-protector -Wno-implicit-function-declaration -g
+	./test
diff --git a/lib/io/io.c b/lib/io/io.c
new file mode 100644
index 0000000..41cd3e0
--- /dev/null
+++ b/lib/io/io.c
@@ -0,0 +1,50 @@
+#include "io.h"
+
+#include "../cstr/cstr.h"
+
+void __wstdn(const char *buf, u64 n)
+{
+	write(STDOUT_FD, buf, n);
+}
+
+
+void wstd(const char *buf)
+{
+	__wstdn(buf, cstr_length(buf));
+}
+
+
+void rstd(char *buf, unsigned long count)
+{
+	read(STDIN_FD, buf, count);
+}
+
+void wstdf__(const char *buf, void **args)
+{
+	const char *start = buf;
+	for (; *buf; ++buf) {
+		if (*buf == '%') {
+			if (buf - start > 0)
+				__wstdn(start, buf - start);
+			
+			++buf;
+
+			switch (*buf) {
+				case '%': __wstdn("%", 1); break;
+				case 's':
+					__wstdn(((const char **)args)[0], cstr_length(((const char**)args)[0]));
+					++args; break;
+			}
+
+			start = buf + 1;
+		}
+	}
+
+	if (buf - start > 0)
+		__wstdn(start, buf - start);
+}
+
+int main() {
+	void *args[] = { "hallo", "welt" };
+	wstdf__("%s %s\n", args);
+}
diff --git a/lib/io/io.h b/lib/io/io.h
new file mode 100644
index 0000000..b68a75d
--- /dev/null
+++ b/lib/io/io.h
@@ -0,0 +1,17 @@
+#ifndef IO_H
+#define IO_H
+
+#include "../sys/io.h"
+
+void wstd(const char *buf);
+void rstd(char *buf, unsigned long count);
+
+void wstdf__(const char *buf, void **args);
+
+#define wstdf(buf, ...) { \
+	void *__wstdf__args__[] = { __VA_ARGS__ }; \
+	wstdf__(buf, __wstdf__args__); \
+}
+
+
+#endif
diff --git a/lib/io/test b/lib/io/test
new file mode 100755
index 0000000..560b047
--- /dev/null
+++ b/lib/io/test
diff --git a/lib/sys/io.h b/lib/sys/io.h
index 3048ebe..8086869 100644
--- a/lib/sys/io.h
+++ b/lib/sys/io.h
@@ -1,5 +1,5 @@
-#ifndef IO_H
-#define IO_H
+#ifndef IO_SYS_H
+#define IO_SYS_H
 
 #include "write.h"
 #include "read.h"
diff --git a/lib/sys/syscalls.h b/lib/sys/syscalls.h
index 03ce997..50e8a4f 100644
--- a/lib/sys/syscalls.h
+++ b/lib/sys/syscalls.h
@@ -3,7 +3,6 @@
 
 __asm__ (
 	"syscall:\n"
-		"endbr64\n" 
 		"mov %rdi,    %rax\n"
 		"mov %rsi,    %rdi\n"
 		"mov %rdx,    %rsi\n"
diff --git a/lib/sys/write.h b/lib/sys/write.h
index 6ad748e..6447ed8 100644
--- a/lib/sys/write.h
+++ b/lib/sys/write.h
@@ -3,7 +3,7 @@
 
 #include "syscalls.h"
 
-static int write(unsigned int fd, const char * buf, unsigned long count)
+static int write(unsigned int fd, const char *buf, unsigned long count)
 {
 	return syscall(WRITE, fd, buf, count);
 }