gawk

commit fafbfebf68d5f724ff4d4d3c75150fbaad575451
parent 9d2f50d1f09844c6f2a3863e281b44074de97114
Author: Jacob R. Edwards <jacobouno@protonmail.com>
Date:   Wed, 23 Dec 2020 12:22:02 -0800

Add range filter

Diffstat:
M
main.c
 | 
20
++++++++++++++++++++

1 file changed, 20 insertions(+), 0 deletions(-)
diff --git a/main.c b/main.c
@@ -370,6 +370,24 @@ findex(int argc, const char **argv, int index, const char **item, command *func)
 	return 0;
 }
 
+/* NOTE: inclusive */
+int
+frange(int argc, const char **argv, int index, const char **item, command *func)
+{
+	unsigned int range[2];
+	int i;
+
+	if (badargs(2, -1, argc, argv))
+		return -1;
+
+	for (i = 0; i < 2; ++i)
+		if (strtorange(&range[i], 0, UINT_MAX, argv[i]))
+			return -1;
+	if (index >= range[0] && index <= range[1])
+		return 1;
+	return 0;
+}
+
 int
 fstring(int argc, const char **argv, int index, const char **item, command *func)
 {
@@ -541,6 +559,8 @@ getfilter(int c)
 		return findex;
 	case 's':
 		return fstring;
+	case 'r':
+		return frange;
 	default:
 		return NULL;
 	}