refactor: add user space printf.

[lunaix-os.git] / lunaix-os / libs / ulibc / printf.c

diff --git a/lunaix-os/libs/ulibc/printf.c b/lunaix-os/libs/ulibc/printf.c
new file mode 100644 (file)
index 0000000..18e2387
--- /dev/null
+++ b/lunaix-os/libs/ulibc/printf.c
@@ -0,0 +1,23 @@
+#include <klibc/stdio.h>
+#include <lunaix/lunistd.h>
+#include <lunaix/spike.h>
+#include <ulibc/stdio.h>
+
+// This is VERY bad implementation as it mixes both kernel and user space
+// code together. It is here however, just for the convenience of our testing
+// program.
+// FIXME Eliminate this when we're able to load program.
+
+void __USER__
+printf(const char* fmt, ...)
+{
+    const char buf[512];
+    va_list args;
+    va_start(args, fmt);
+
+    size_t sz = __ksprintf_internal(buf, fmt, 512, args);
+
+    write(stdout, buf, sz);
+
+    va_end(args);
+}
\ No newline at end of file