1 files changed, 48 insertions, 0 deletions
diff --git a/flags.c b/flags.c
new file mode 100644
index 0000000..fd66951
--- /dev/null
+++ b/flags.c
@@ -0,0 +1,48 @@
+#include <string.h>
+#include <stdio.h>
+#include <stdint.h>
+
+int
+main(int argc, char *argv[])
+{
+	int i;
+	unsigned int j;
+	char *f, *e;
+
+	int8_t flagmod[255] = { 0 };
+
+	for (i = 1; i < argc; i++) {
+		if (*argv[i] == '+') {
+			f = argv[i] + 1;
+			while (*f)
+				flagmod[(int)*f++]++;
+			continue;
+		} else if (*argv[i] == '-') {
+			f = argv[i] + 1;
+			while (*f)
+				flagmod[(int)*f++]--;
+			continue;
+		}
+
+		int8_t flags[255] = { 0 };
+		char flagstr[255];
+		f = e = strstr(argv[i], ":2,");
+
+		if (!f)
+			continue;
+		f += 3;
+		while (*f)
+			flags[(int)*f++] = 1;
+
+		*e = 0;
+		f = flagstr;
+		for (j = 0; j < sizeof flags; j++)
+			if (flags[j] + flagmod[j])
+				*f++ = j;
+		*f = 0;
+
+		printf("%s:2,%s\n", argv[i], flagstr);
+	}
+
+	return 0;
+}