1 files changed, 42 insertions, 0 deletions

diff --git a/src/lib/libc/stdlib/a64l.c b/src/lib/libc/stdlib/a64l.c
new file mode 100644
index 0000000000..5312929c6f
--- /dev/null
+++ b/src/lib/libc/stdlib/a64l.c
@@ -0,0 +1,42 @@
+/*      $OpenBSD: a64l.c,v 1.5 2005/08/08 08:05:36 espie Exp $ */
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+
+long
+a64l(const char *s)
+{
+        long value, digit, shift;
+        int i;
+
+        if (s == NULL) {
+                errno = EINVAL;
+                return(-1L);
+        }
+
+        value = 0;
+        shift = 0;
+        for (i = 0; *s && i < 6; i++, s++) {
+                if (*s >= '.' && *s <= '/')
+                        digit = *s - '.';
+                else if (*s >= '0' && *s <= '9')
+                        digit = *s - '0' + 2;
+                else if (*s >= 'A' && *s <= 'Z')
+                        digit = *s - 'A' + 12;
+                else if (*s >= 'a' && *s <= 'z')
+                        digit = *s - 'a' + 38;
+                else {
+                        errno = EINVAL;
+                        return(-1L);
+                }
+
+                value |= digit << shift;
+                shift += 6;
+        }
+
+        return(value);
+}