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/* unicode.c - convert between Unicode and UTF-8
*
* Copyright 2020 The Android Open Source Project.
*
* Loosely based on the Plan9/Inferno unicode(1).
USE_UNICODE(NEWTOY(unicode, "<1", TOYFLAG_USR|TOYFLAG_BIN))
config UNICODE
bool "unicode"
default n
help
usage: unicode [[min]-max]
Convert between Unicode code points and UTF-8, in both directions.
*/
#define FOR_unicode
#include "toys.h"
static void codepoint(unsigned wc) {
char *low="NULSOHSTXETXEOTENQACKBELBS HT LF VT FF CR SO SI DLEDC1DC2DC3DC4"
"NAKSYNETBCANEM SUBESCFS GS RS US ";
unsigned n, i;
printf("U+%04X : ", wc);
if (wc < ' ') printf("%.3s", low+(wc*3));
else if (wc == 0x7f) printf("DEL");
else {
toybuf[n = wctoutf8(toybuf, wc)] = 0;
printf("%s%s", toybuf, n>1 ? " :":"");
if (n>1) for (i = 0; i < n; i++) printf(" %#02x", toybuf[i]);
}
xputc('\n');
}
void unicode_main(void)
{
unsigned from, to;
char next, **args;
for (args = toys.optargs; *args; args++) {
// unicode 660-666 => table of `U+0600 : ٠ : 0xd9 0xa0` etc.
if (sscanf(*args, "%x-%x%c", &from, &to, &next) == 2) {
while (from <= to) codepoint(from++);
// unicode 666 => just `U+0666 : ٦ : 0xd9 0xa6`.
} else if (sscanf(*args, "%x%c", &from, &next) == 1) {
codepoint(from);
// unicode hello => table showing every character in the string.
} else {
char *s = *args;
size_t l = strlen(s);
wchar_t wc;
int n;
while ((n = utf8towc(&wc, s, l)) > 0) {
codepoint(wc);
s += n;
l -= n;
}
}
}
}
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