1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/boot/isdigit.h b/arch/x86/boot/isdigit.h
new file mode 100644
index 00000000000..25e13403193
--- /dev/null
+++ b/arch/x86/boot/isdigit.h
@@ -0,0 +1,21 @@
+#ifndef BOOT_ISDIGIT_H
+
+#define BOOT_ISDIGIT_H
+
+static inline int isdigit(int ch)
+{
+	return (ch >= '0') && (ch <= '9');
+}
+
+static inline int isxdigit(int ch)
+{
+	if (isdigit(ch))
+		return true;
+
+	if ((ch >= 'a') && (ch <= 'f'))
+		return true;
+
+	return (ch >= 'A') && (ch <= 'F');
+}
+
+#endif