X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=lib%2Fcmdline.c;h=f596c08d213a0726c5f395209a3e20d730c3ea2c;hb=255f0385c8e0d6b9005c0e09fffb5bd852f3b506;hp=0331ed825ea79e568a881852020a80adc3d4d658;hpb=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2;p=karo-tx-linux.git

diff --git a/lib/cmdline.c b/lib/cmdline.c
index 0331ed825ea7..f596c08d213a 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -16,6 +16,23 @@
 #include <linux/kernel.h>
 #include <linux/string.h>
 
+/*
+ *	If a hyphen was found in get_option, this will handle the
+ *	range of numbers, M-N.  This will expand the range and insert
+ *	the values[M, M+1, ..., N] into the ints array in get_options.
+ */
+
+static int get_range(char **str, int *pint)
+{
+	int x, inc_counter, upper_range;
+
+	(*str)++;
+	upper_range = simple_strtol((*str), NULL, 0);
+	inc_counter = upper_range - *pint;
+	for (x = *pint; x < upper_range; x++)
+		*pint++ = x;
+	return inc_counter;
+}
 
 /**
  *	get_option - Parse integer from an option string
@@ -26,9 +43,10 @@
  *	comma as well.
  *
  *	Return values:
- *	0 : no int in string
- *	1 : int found, no subsequent comma
- *	2 : int found including a subsequent comma
+ *	0 - no int in string
+ *	1 - int found, no subsequent comma
+ *	2 - int found including a subsequent comma
+ *	3 - hyphen found to denote a range
  */
 
 int get_option (char **str, int *pint)
@@ -44,6 +62,8 @@ int get_option (char **str, int *pint)
 		(*str)++;
 		return 2;
 	}
+	if (**str == '-')
+		return 3;
 
 	return 1;
 }
@@ -55,7 +75,8 @@ int get_option (char **str, int *pint)
  *	@ints: integer array
  *
  *	This function parses a string containing a comma-separated
- *	list of integers.  The parse halts when the array is
+ *	list of integers, a hyphen-separated range of _positive_ integers,
+ *	or a combination of both.  The parse halts when the array is
  *	full, or when no more numbers can be retrieved from the
  *	string.
  *
@@ -72,6 +93,18 @@ char *get_options(const char *str, int nints, int *ints)
 		res = get_option ((char **)&str, ints + i);
 		if (res == 0)
 			break;
+		if (res == 3) {
+			int range_nums;
+			range_nums = get_range((char **)&str, ints + i);
+			if (range_nums < 0)
+				break;
+			/*
+			 * Decrement the result by one to leave out the
+			 * last number in the range.  The next iteration
+			 * will handle the upper number in the range
+			 */
+			i += (range_nums - 1);
+		}
 		i++;
 		if (res == 1)
 			break;