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Make terminal ui binaries work well everywhere

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Here's some screenshots of an emulator tui program that was compiled on
Linux, then scp'd it to Windows, Mac, and FreeBSD.

https://justine.storage.googleapis.com/blinkenlights-cmdexe.png
https://justine.storage.googleapis.com/blinkenlights-imac.png
https://justine.storage.googleapis.com/blinkenlights-freebsd.png
https://justine.storage.googleapis.com/blinkenlights-lisp.png

How is this even possible that we have a nontrivial ui binary that just
works on Mac, Windows, Linux, and BSD? Surely a first ever achievement.

Fixed many bugs. Bootstrapped John McCarthy's metacircular evaluator on
bare metal in half the size of Altair BASIC (about 2.5kb) and ran it in
emulator for fun and profit.
This commit is contained in:
Justine Tunney
2020-10-10 21:18:53 -07:00
parent 680daf1210
commit 9e3e985ae5
276 changed files with 7026 additions and 3790 deletions
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27
libc/str/tprecode16to8.c
View File

@ -19,7 +19,8 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/conv/conv.h"
#include "libc/str/str.h"
#include "libc/str/tpencode.h"
#include "libc/str/tpenc.h"
#include "libc/str/utf16.h"
/**
* Transcodes UTF-16 to UTF-8.
@ -30,19 +31,25 @@
* @return number of bytes written excluding NUL
*/
size_t tprecode16to8(char *dst, size_t dstsize, const char16_t *src) {
size_t i = 0;
size_t i;
uint64_t w;
wint_t x, y;
i = 0;
if (dstsize) {
for (;;) {
wint_t wc;
src += abs(getutf16(src, &wc));
if (!wc || dstsize == 1) {
dst[i] = '\0';
break;
if (!(x = *src++)) break;
if (IsUtf16Cont(x)) continue;
if (!IsUcs2(x)) {
if (!(y = *src++)) break;
x = MergeUtf16(x, y);
}
w = tpenc(x);
while (w && i + 1 < dstsize) {
dst[i++] = w & 0xFF;
w >>= 8;
}
size_t got = abs(tpencode(&dst[i], dstsize, wc, false));
dstsize -= got;
i += got;
}
dst[i] = 0;
}
return i;
}