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 * unicode.c - convert between Unicode and UTF-8
9 *
10 * Copyright 2020 The Android Open Source Project.
11 *
12 * Loosely based on the Plan9/Inferno unicode(1).
13
14 USE_ASCII(NEWTOY(ascii, 0, TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LINEBUF))
15 USE_UNICODE(NEWTOY(unicode, "<1", TOYFLAG_USR|TOYFLAG_BIN))
16
17 config ASCII
18 bool "ascii"
19 default y
20 help
21 usage: ascii
22
23 Display ascii character set.
24
25 config UNICODE
26 bool "unicode"
27 default y
28 help
29 usage: unicode CODE[-END]...
30
31 Convert between Unicode code points and UTF-8, in both directions.
32 CODE can be one or more characters (show U+XXXX), hex numbers
33 (show character), or dash separated range.
34 */
35
36 #define FOR_unicode
37 #include "toys.h"
38
39 static char *low="NULSOHSTXETXEOTENQACKBELBS HT LF VT FF CR SO SI DLEDC1DC2"
40 "DC3DC4NAKSYNETBCANEM SUBESCFS GS RS US ";
41
codepoint(unsigned wc)42 static void codepoint(unsigned wc)
43 {
44 char *s = toybuf + sprintf(toybuf, "U+%04X : ", wc), *ss;
45 unsigned n, i;
46
47 if (wc>31 && wc!=127) {
48 s += n = wctoutf8(ss = s, wc);
49 if (n>1) for (i = 0; i<n; i++) s += sprintf(s, " : %#02x"+2*!!i, *ss++);
50 } else s = memcpy(s, (wc==127) ? "DEL" : low+wc*3, 3)+3;
51 *s++ = '\n';
52 writeall(1, toybuf, s-toybuf);
53 }
54
unicode_main(void)55 void unicode_main(void)
56 {
57 int from, to, n;
58 char next, **args, *s;
59 unsigned wc;
60
61 // Loop through args, handling range, hex code, or character(s)
62 for (args = toys.optargs; *args; args++) {
63 if (sscanf(*args, "%x-%x%c", &from, &to, &next) == 2)
64 while (from <= to) codepoint(from++);
65 else if (sscanf(*args, "%x%c", &from, &next) == 1) codepoint(from);
66 else for (s = *args; (n = utf8towc(&wc, s, 4)) > 0; s += n) codepoint(wc);
67 }
68 }
69
ascii_main(void)70 void ascii_main(void)
71 {
72 char *s = toybuf;
73 int i, x, y;
74
75 for (y = -1; y<16; y++) for (x = 0; x<8; x++) {
76 if (y>=0) {
77 i = (x<<4)+y;
78 s += sprintf(s, "% *d %02X ", 3+(x>5), i, i);
79 if (i<32 || i==127) s += sprintf(s, "%.3s", (i<32) ? low+3*i : "DEL");
80 else *s++ = i;
81 } else s += sprintf(s, "Dec Hex%*c", 1+2*(x<2)+(x>4), ' ');
82 *s++ = (x>6) ? '\n' : ' ';
83 }
84 writeall(1, toybuf, s-toybuf);
85 }
86