Imported from /home/lorry/working-area/delta_ntp/ntp-dev-4.2.7p482.tar.gz.ntp-dev-4.2.7p482

1 files changed, 42 insertions, 0 deletions

diff --git a/libntp/hextoint.c b/libntp/hextoint.c
new file mode 100644
index 0000000..d24b5a0
--- /dev/null
+++ b/libntp/hextoint.c
@@ -0,0 +1,42 @@
+/*
+ * hextoint - convert an ascii string in hex to an unsigned
+ *	      long, with error checking
+ */
+#include <config.h>
+#include <ctype.h>
+
+#include "ntp_stdlib.h"
+
+int
+hextoint(
+	const char *str,
+	u_long *pu
+	)
+{
+	register u_long u;
+	register const char *cp;
+
+	cp = str;
+
+	if (*cp == '\0')
+		return 0;
+
+	u = 0;
+	while (*cp != '\0') {
+		if (!isxdigit(*cp))
+			return 0;
+		if (u & 0xF0000000)
+			return 0;	/* overflow */
+		u <<= 4;
+		if ('0' <= *cp && *cp <= '9')
+			u += *cp++ - '0';
+		else if ('a' <= *cp && *cp <= 'f')
+			u += *cp++ - 'a' + 10;
+		else if ('A' <= *cp && *cp <= 'F')
+			u += *cp++ - 'A' + 10;
+		else
+			return 0;
+	}
+	*pu = u;
+	return 1;
+}