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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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22
libc/runtime/getdosenviron.h
View File

@@ -22,6 +22,7 @@
#ifndef __STRICT_ANSI__
#include "libc/bits/safemacros.h"
#include "libc/str/appendchar.h"
#include "libc/str/str.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
/**
@@ -34,25 +35,28 @@
* @param max is the pointer count capacity of envp
* @return number of variables decoded, excluding NULL-terminator
*/
static inline int getdosenviron(const char16_t *env, char *buf, size_t size,
static inline int GetDosEnviron(const char16_t *env, char *buf, size_t size,
char **envp, size_t max) {
const char16_t *s = env;
size_t envc = 0;
wint_t wc;
size_t envc;
char *p, *pe;
bool endstring;
const char16_t *s;
s = env;
envc = 0;
if (size) {
wint_t wc;
char *p = buf;
char *pe = buf + size - 1;
p = buf;
pe = buf + size - 1;
if (p < pe) {
s += getutf16(s, &wc);
wc = DecodeNtsUtf16(&s);
while (wc) {
if (++envc < max) {
envp[envc - 1] = p < pe ? p : NULL;
}
bool endstring;
do {
AppendChar(&p, pe, wc);
endstring = !wc;
s += getutf16(s, &wc);
wc = DecodeNtsUtf16(&s);
} while (!endstring);
buf[min(p - buf, size - 2)] = u'\0';
}