1 files changed, 23 insertions, 0 deletions
diff --git a/scan_xlong.c b/scan_xlong.c
new file mode 100644
index 0000000..1113433
--- /dev/null
+++ b/scan_xlong.c
@@ -0,0 +1,23 @@
+#include "scan.h"
+
+static inline int fromhex(unsigned char c) {
+  if (c>='0' && c<='9')
+    return c-'0';
+  else if (c>='A' && c<='F')
+    return c-'A'+10;
+  else if (c>='a' && c<='f')
+    return c-'a'+10;
+  return -1;
+}
+
+unsigned int scan_xlong(const char *src,unsigned long *dest) {
+  register const char *tmp=src;
+  register int l=0;
+  register unsigned char c;
+  while ((c=fromhex(*tmp))<16) {
+    l=(l<<4)+c;
+    ++tmp;
+  }
+  *dest=l;
+  return tmp-src;
+}