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- /* 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.
- *
- * unicode.c - convert between Unicode and UTF-8
- *
- * Copyright 2020 The Android Open Source Project.
- *
- * Loosely based on the Plan9/Inferno unicode(1).
- USE_ASCII(NEWTOY(ascii, 0, TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LINEBUF))
- USE_UNICODE(NEWTOY(unicode, "<1", TOYFLAG_USR|TOYFLAG_BIN))
- config ASCII
- bool "ascii"
- default y
- help
- usage: ascii
- Display ascii character set.
- config UNICODE
- bool "unicode"
- default y
- help
- usage: unicode CODE[-END]...
- Convert between Unicode code points and UTF-8, in both directions.
- CODE can be one or more characters (show U+XXXX), hex numbers
- (show character), or dash separated range.
- */
- #define FOR_unicode
- #include "toys.h"
- static char *low="NULSOHSTXETXEOTENQACKBELBS HT LF VT FF CR SO SI DLEDC1DC2"
- "DC3DC4NAKSYNETBCANEM SUBESCFS GS RS US ";
- static void codepoint(unsigned wc)
- {
- char *s = toybuf + sprintf(toybuf, "U+%04X : ", wc), *ss;
- unsigned n, i;
- if (wc>31 && wc!=127) {
- s += n = wctoutf8(ss = s, wc);
- if (n>1) for (i = 0; i<n; i++) s += sprintf(s, " : %#02x"+2*!!i, *ss++);
- } else s = memcpy(s, (wc==127) ? "DEL" : low+wc*3, 3)+3;
- *s++ = '\n';
- writeall(1, toybuf, s-toybuf);
- }
- void unicode_main(void)
- {
- int from, to, n;
- char next, **args, *s;
- unsigned wc;
- // Loop through args, handling range, hex code, or character(s)
- for (args = toys.optargs; *args; args++) {
- if (sscanf(*args, "%x-%x%c", &from, &to, &next) == 2)
- while (from <= to) codepoint(from++);
- else if (sscanf(*args, "%x%c", &from, &next) == 1) codepoint(from);
- else for (s = *args; (n = utf8towc(&wc, s, 4)) > 0; s += n) codepoint(wc);
- }
- }
- void ascii_main(void)
- {
- char *s = toybuf;
- int i, x, y;
- for (y = -1; y<16; y++) for (x = 0; x<8; x++) {
- if (y>=0) {
- i = (x<<4)+y;
- s += sprintf(s, "% *d %02X ", 3+(x>5), i, i);
- if (i<32 || i==127) s += sprintf(s, "%.3s", (i<32) ? low+3*i : "DEL");
- else *s++ = i;
- } else s += sprintf(s, "Dec Hex%*c", 1+2*(x<2)+(x>4), ' ');
- *s++ = (x>6) ? '\n' : ' ';
- }
- writeall(1, toybuf, s-toybuf);
- }
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