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authorDenis Vlasenko <vda.linux@googlemail.com>2007-12-30 20:13:39 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2007-12-30 20:13:39 +0000
commit27963980dbe1262fd6c447fc7d06839aea0861bc (patch)
treecf04b9d237cb1c9dc47c76919342d25a11e815c0 /libbb
parentd3c042fc605737643c265a7f86fc7a77c88f629e (diff)
downloadbusybox-27963980dbe1262fd6c447fc7d06839aea0861bc.tar.gz
adding libbb/printable.c
Diffstat (limited to 'libbb')
-rw-r--r--libbb/printable.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/libbb/printable.c b/libbb/printable.c
new file mode 100644
index 000000000..2420a91f0
--- /dev/null
+++ b/libbb/printable.c
@@ -0,0 +1,34 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2007 Denis Vlasenko
+ *
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+void fputc_printable(int ch, FILE *file)
+{
+ if ((ch & (0x80 + PRINTABLE_META)) == (0x80 + PRINTABLE_META)) {
+ fputs("M-", file);
+ ch &= 0x7f;
+ }
+ ch = (unsigned char) ch;
+ if (ch == 0x9b) {
+ /* VT100's CSI, aka Meta-ESC, is not printable on vt-100 */
+ ch = '{';
+ goto print_caret;
+ }
+ if (ch < ' ') {
+ ch += '@';
+ goto print_caret;
+ }
+ if (ch == 0x7f) {
+ ch = '?';
+ print_caret:
+ fputc('^', file);
+ }
+ fputc(ch, file);
+}