1 files changed, 18 insertions, 0 deletions
diff --git a/src/libstddjb/ucharn_scan.c b/src/libstddjb/ucharn_scan.c
new file mode 100644
index 0000000..cdcc403
--- /dev/null
+++ b/src/libstddjb/ucharn_scan.c
@@ -0,0 +1,18 @@
+/* ISC license. */
+
+#include <skalibs/fmtscan.h>
+
+unsigned int ucharn_scan (char const *s, char *key, unsigned int n)
+{
+  register unsigned int i = 0 ;
+  for (; i < n ; i++)
+  {
+    unsigned char c = fmtscan_num(s[2*i], 16) ;
+    if (c > 0xF) return 0 ;
+    key[i] = c << 4 ;
+    c = fmtscan_num(s[2*i+1], 16) ;
+    if (c > 0xF) return 0 ;
+    key[i] += c ;
+  }
+  return n << 1 ;
+}