1 /* ascii.c - display ascii table 2 * 3 * Copyright 2017 Rob Landley <rob (at) 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 n 13 help 14 usage: ascii 15 16 Display ascii character set. 17 */ 18 19 #include "toys.h" 20 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
