1 files changed, 81 insertions, 0 deletions
diff --git a/examples/vm_power_manager/parse.c b/examples/vm_power_manager/parse.c
new file mode 100644
index 00000000..8231533b
--- /dev/null
+++ b/examples/vm_power_manager/parse.c
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation.
+ * Copyright(c) 2014 6WIND S.A.
+ */
+
+#include <string.h>
+#include <rte_log.h>
+#include "parse.h"
+
+/*
+ * Parse elem, the elem could be single number/range or group
+ * 1) A single number elem, it's just a simple digit. e.g. 9
+ * 2) A single range elem, two digits with a '-' between. e.g. 2-6
+ * 3) A group elem, combines multiple 1) or 2) e.g 0,2-4,6
+ *    Within group, '-' used for a range separator;
+ *                       ',' used for a single number.
+ */
+int
+parse_set(const char *input, uint16_t set[], unsigned int num)
+{
+	unsigned int idx;
+	const char *str = input;
+	char *end = NULL;
+	unsigned int min, max;
+
+	memset(set, 0, num * sizeof(uint16_t));
+
+	while (isblank(*str))
+		str++;
+
+	/* only digit or left bracket is qualify for start point */
+	if (!isdigit(*str) || *str == '\0')
+		return -1;
+
+	while (isblank(*str))
+		str++;
+	if (*str == '\0')
+		return -1;
+
+	min = num;
+	do {
+
+		/* go ahead to the first digit */
+		while (isblank(*str))
+			str++;
+		if (!isdigit(*str))
+			return -1;
+
+		/* get the digit value */
+		errno = 0;
+		idx = strtoul(str, &end, 10);
+		if (errno || end == NULL || idx >= num)
+			return -1;
+
+		/* go ahead to separator '-' and ',' */
+		while (isblank(*end))
+			end++;
+		if (*end == '-') {
+			if (min == num)
+				min = idx;
+			else /* avoid continuous '-' */
+				return -1;
+		} else if ((*end == ',') || (*end == '\0')) {
+			max = idx;
+
+			if (min == num)
+				min = idx;
+
+			for (idx = RTE_MIN(min, max);
+					idx <= RTE_MAX(min, max); idx++) {
+				set[idx] = 1;
+			}
+			min = num;
+		} else
+			return -1;
+
+		str = end + 1;
+	} while (*end != '\0');
+
+	return str - input;
+}