Added paramvalue to the library.

lib/other/paramvalue.c

@@ -0,0 +1,51 @@
+/*	paramvalue() - decode kernel parameter values	Author: Kees J. Bot
+ *								7 May 1994
+ * The kernel returns the results of parameter queries
+ * by the XXQUERYPARAM svrctl calls as an array of hex digits, like this:
+ * "75020000,080C0000".  These are the values of two four-byte variables.
+ * Paramvalue() decodes such a string.
+ */
+#define nil 0
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <minix/queryparam.h>
+
+size_t paramvalue(char **value, void *address, size_t size)
+/* Decode the string *value storing the result in the object at address with
+ * the given size.  *value is left at the next parameter, *address is padded
+ * with zeros if needed, and the actual size of the value is returned.
+ */
+{
+	unsigned char *addr= address;
+	char *v= *value;
+	int nibble;
+	size_t n;
+
+	n= 0;
+
+	while (*v != 0 && *v != ',') {
+		nibble= *v++ - '0';
+		if (nibble > 0x9) nibble= nibble + '0' - 'A' + 0xA;
+		if (nibble > 0xF) nibble= nibble + 'A' - 'a';
+		if (size > 0) {
+			if (n % 2 == 0) {
+				*addr= nibble << 4;
+			} else {
+				*addr++|= nibble;
+				size--;
+			}
+			n++;
+		}
+	}
+	while (size > 0) { *addr++= 0; size--; }
+	while (*v != 0 && *v++ != ',') {}
+	*value= v;
+	return n / 2;
+}
+
+
+/*
+ * $PchId: paramvalue.c,v 1.3 1996/02/22 09:15:56 philip Exp $
+ */