+
−/*
+
− * The function implemented in this module is intended for validating inputs
+
− * that are expected to be in the form of GSM7 characters carried in an octet
+
− * string, where the high bit of every octet is expected to be cleared.
+
− */
+
−
+
−#include <sys/types.h>
+
−
+
−check_high_bit(buf, len)
+
−	u_char *buf;
+
−	unsigned len;
+
−{
+
−	unsigned n;
+
−
+
−	for (n = 0; n < len; n++) {
+
−		if (buf[n] & 0x80)
+
−			return(-1);
+
−	}
+
−	return(0);
+
−}