Add ascii: display ascii table.

1 files changed, 39 insertions, 0 deletions

diff --git a/toys/other/ascii.c b/toys/other/ascii.c
new file mode 100644
index 00000000..4d33ae61
--- /dev/null
+++ b/toys/other/ascii.c
@@ -0,0 +1,39 @@
+/* ascii.c - display ascii table
+ *
+ * Copyright 2017 Rob Landley <rob@landley.net>
+ *
+ * Technically 7-bit ASCII is ANSI X3.4-1986, a standard available as
+ * INCITS 4-1986[R2012] on ansi.org, but they charge for it.
+
+USE_ASCII(NEWTOY(ascii, 0, TOYFLAG_USR|TOYFLAG_BIN))
+
+config ASCII
+  bool "ascii"
+  default n
+  help
+    usage: ascii
+
+    Display ascii character set.
+*/
+
+#include "toys.h"
+
+void ascii_main(void)
+{
+  char *low="NULSOHSTXETXEOTENQACKBELBS HT LF VT FF CR SO SI DLEDC1DC2DC3DC4"
+            "NAKSYNETBCANEM SUBESCFS GS RS US ";
+  int x, y;
+
+  for (x = 0; x<8; x++) printf("Dec Hex%*c", 2+2*(x<2)+(x>4), ' ');
+  xputc('\n');
+  for (y=0; y<15; y++) {
+    for (x=0; x<8; x++) {
+      int i = x*16+y;
+
+      printf("% 3d %02X ", i, i);
+      if (i<32) printf("%.3s ", low+3*i);
+      else printf("%*c ", 2*(i>95 && i<100), i);
+    }
+    xputc('\n');
+  }
+}