1 /* ascii.c - display ascii table
2 *
3 * Copyright 2017 Rob Landley <rob@landley.net>
4 *
5 * Technically 7-bit ASCII is ANSI X3.4-1986, a standard available as
6 * INCITS 4-1986[R2012] on ansi.org, but they charge for it.
7
8 USE_ASCII(NEWTOY(ascii, 0, TOYFLAG_USR|TOYFLAG_BIN))
9
10 config ASCII
11 bool "ascii"
12 default y
13 help
14 usage: ascii
15
16 Display ascii character set.
17 */
18
19 #include "toys.h"
20
ascii_main(void)21 void ascii_main(void)
22 {
23 char *low="NULSOHSTXETXEOTENQACKBELBS HT LF VT FF CR SO SI DLEDC1DC2DC3DC4"
24 "NAKSYNETBCANEM SUBESCFS GS RS US ";
25 int x, y;
26
27 for (x = 0; x<8; x++) printf("Dec Hex%*c", 2+2*(x<2)+(x>4), ' ');
28 xputc('\n');
29 for (y=0; y<=15; y++) {
30 for (x=0; x<8; x++) {
31 int i = x*16+y;
32
33 if (i>95 && i<100) putchar(' ');
34 printf("% 3d %02X ", i, i);
35 if (i<32 || i==127) printf("%.3s ", (i==127) ? "DEL" : low+3*i);
36 else printf("%c ", i);
37 }
38 xputc('\n');
39 }
40 }
41