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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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