Split CE code into multiple files

ce/mprintf.c

@@ -0,0 +1,27 @@
+#include "mprintf.h"
+#include "self.h"
+#include <liballoc.h>
+#include <printf.h>
+#include <stdarg.h>
+#include <system.h>
+
+void putchar_ (char ch) { (void)ch; }
+
+void mprintf (const char* fmt, ...) {
+  va_list args;
+  va_start (args, fmt);
+
+  char* buf = malloc (MPRINTF_BUF_MAX);
+
+  if (buf == NULL) {
+    va_end (args);
+    return;
+  }
+
+  int len = vsnprintf (buf, MPRINTF_BUF_MAX, fmt, args);
+
+  va_end (args);
+
+  mail_send (e_pgid, buf, len);
+  free (buf);
+}