1 files changed, 24 insertions, 0 deletions

diff --git a/libbb/printable.c b/libbb/printable.c
index f6ada4904..9a423431e 100644
--- a/libbb/printable.c
+++ b/libbb/printable.c
@@ -32,3 +32,27 @@ void FAST_FUNC fputc_printable(int ch, FILE *file)
         }
         fputc(ch, file);
 }
+
+void FAST_FUNC visible(unsigned ch, char *buf, int flags)
+{
+        if (ch == '\t' && !(flags & VISIBLE_SHOW_TABS)) {
+                goto raw;
+        }
+        if (ch == '\n') {
+                if (flags & VISIBLE_ENDLINE)
+                        *buf++ = '$';
+        } else {
+                if (ch >= 128) {
+                        ch -= 128;
+                        *buf++ = 'M';
+                        *buf++ = '-';
+                }
+                if (ch < 32 || ch == 127) {
+                        *buf++ = '^';
+                        ch ^= 0x40;
+                }
+        }
+ raw:
+        *buf++ = ch;
+        *buf = '\0';
+}