Printf in userspace

ulib/Makefile

@@ -9,9 +9,11 @@ SRCFILES := $(call GRABSRC, \
 							syscall \
 							string \
 							system \
+							printf \
 						)
 
-CFLAGS += -isystem $(ROOT)/share -isystem $(ROOT)/ulib -isystem $(ROOT)/std/include
+CFLAGS += -isystem $(ROOT)/share -isystem $(ROOT)/ulib -isystem $(ROOT)/std/include \
+					-DPRINTF_INCLUDE_CONFIG_H=1
 
 ASFILES := $(call GET_ASFILES, $(SRCFILES))
 CFILES := $(call GET_CFILES, $(SRCFILES))

ulib/printf/printf.c

@@ -0,0 +1 @@
+../../share/printf/printf.c

ulib/printf/printf.h

@@ -0,0 +1 @@
+../../share/printf/printf.h

ulib/printf/printf_config.h

@@ -0,0 +1 @@
+../../share/printf/printf_config.h

ulib/putchar.c

@@ -0,0 +1,9 @@
+#include <stdint.h>
+#include <sysdefs/ipcpipe.h>
+#include <system/ipcpipe.h>
+#include <printf/printf.h>
+
+void putchar_(char c) {
+  char buf = c;
+  ipcpipe(IPCPIPE_SELFPID, IPCPIPE_OUT, IPCPIPE_WRITE, (uint8_t *)&buf, sizeof(buf));
+}

ulib/uprintf.h

@@ -0,0 +1,13 @@
+#ifndef ULIB_UPRINTF_H_
+#define ULIB_UPRINTF_H_
+
+#include <printf/printf.h>
+
+#define uprintf     printf_
+#define usprintf    sprintf_
+#define uvsprintf   vsprintf_
+#define usnprintf   snprintf_
+#define uvsnprintf  vsnprintf_
+#define uvprintf    vprintf_
+
+#endif // ULIB_UPRINTF_H_