1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/vsprintf.c b/kernel/vsprintf.c
new file mode 100644
index 0000000..f3feb43
--- /dev/null
+++ b/kernel/vsprintf.c
@@ -0,0 +1,18 @@
+#include <stdarg.h>
+
+int vsprintf(char *str, char *fmt, va_list ap) {
+  char *start = str;
+
+  while(*fmt) {
+    if(*fmt != '%') {
+      *str++ = *fmt++;
+      continue;
+    }
+
+    fmt++;
+  }
+
+  *str = 0;
+
+  return (str - start);
+}