New upstream version 4.15.1

lib/getrange.c

@@ -0,0 +1,94 @@
+/*
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#ident "$Id: $"
+
+#include <ctype.h>
+#include <stdlib.h>
+
+#include "atoi/strtou_noneg.h"
+#include "defines.h"
+#include "prototypes.h"
+
+
+/*
+ * Parse a range and indicate if the range is valid.
+ * Valid ranges are in the form:
+ *     <long>          -> min=max=long         has_min  has_max
+ *     -<long>         -> max=long            !has_min  has_max
+ *     <long>-         -> min=long             has_min !has_max
+ *     <long1>-<long2> -> min=long1 max=long2  has_min  has_max
+ */
+int
+getrange(const char *range,
+         unsigned long *min, bool *has_min,
+         unsigned long *max, bool *has_max)
+{
+	char *endptr;
+	unsigned long n;
+
+	if (NULL == range)
+		return -1;
+
+	if ('-' == range[0]) {
+		if (!isdigit(range[1]))
+			return -1;
+
+		errno = 0;
+		n = strtoul_noneg(&range[1], &endptr, 10);
+		if (('\0' != *endptr) || (0 != errno))
+			return -1;
+
+		/* -<long> */
+		*has_min = false;
+		*has_max = true;
+		*max = n;
+	} else {
+		errno = 0;
+		n = strtoul_noneg(range, &endptr, 10);
+		if (endptr == range || 0 != errno)
+			return -1;
+
+		switch (*endptr) {
+		case '\0':
+			/* <long> */
+			*has_min = true;
+			*has_max = true;
+			*min = n;
+			*max = n;
+			break;
+		case '-':
+			endptr++;
+			if ('\0' == *endptr) {
+				/* <long>- */
+				*has_min = true;
+				*has_max = false;
+				*min = n;
+			} else if (!isdigit (*endptr)) {
+				return -1;
+			} else {
+				*has_min = true;
+				*min = n;
+				errno = 0;
+				n = strtoul_noneg(endptr, &endptr, 10);
+				if ('\0' != *endptr || 0 != errno)
+					return -1;
+
+				/* <long>-<long> */
+				*has_max = true;
+				*max = n;
+			}
+			break;
+		default:
+			return -1;
+		}
+	}
+
+	return 0;
+}