separate from libc

1 files changed, 29 insertions, 0 deletions

diff --git a/unctrl/unctrl.c b/unctrl/unctrl.c
new file mode 100644
index 0000000..fc77e6b
--- /dev/null
+++ b/unctrl/unctrl.c
@@ -0,0 +1,29 @@
+#include <unctrl.h>
+#include <curses.h>
+#include <ctype.h>
+#include <stddef.h>
+
+char * unctrl(chtype c)
+{
+	static char buf[3];
+	char * ret = NULL;
+	int ch = c & A_CHARTEXT;
+
+	if (iscntrl(ch)) {
+		buf[0] = '^';
+		buf[1] = ch + 'A';
+		buf[2] = '\0';
+		ret = buf;
+	} else if (isprint(ch)) {
+		buf[0] = ch;
+		buf[1] = '\0';
+		ret = buf;
+	}
+
+	return ret;
+}
+
+/*
+XOPEN(4)
+LINK(curses)
+*/