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https://github.com/jart/cosmopolitan.git
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9e3e985ae5
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.
73 lines
3.4 KiB
C
73 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=8 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#ifndef COSMOPOLITAN_LIBC_DOSENVIRON_H_
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#define COSMOPOLITAN_LIBC_DOSENVIRON_H_
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#ifndef __STRICT_ANSI__
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#include "libc/bits/safemacros.h"
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#include "libc/str/appendchar.h"
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#include "libc/str/str.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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/**
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* Transcodes NT environment variable block from UTF-16 to UTF-8.
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*
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* @param env is a double NUL-terminated block of key=values
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* @param buf is the new environment
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* @param size is the byte capacity of buf
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* @param envp stores NULL-terminated string pointer list
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* @param max is the pointer count capacity of envp
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* @return number of variables decoded, excluding NULL-terminator
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*/
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static inline int GetDosEnviron(const char16_t *env, char *buf, size_t size,
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char **envp, size_t max) {
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wint_t wc;
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size_t envc;
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char *p, *pe;
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bool endstring;
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const char16_t *s;
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s = env;
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envc = 0;
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if (size) {
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p = buf;
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pe = buf + size - 1;
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if (p < pe) {
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wc = DecodeNtsUtf16(&s);
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while (wc) {
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if (++envc < max) {
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envp[envc - 1] = p < pe ? p : NULL;
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}
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do {
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AppendChar(&p, pe, wc);
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endstring = !wc;
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wc = DecodeNtsUtf16(&s);
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} while (!endstring);
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buf[min(p - buf, size - 2)] = u'\0';
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}
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}
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AppendChar(&p, pe, '\0');
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buf[min(p - buf, size - 1)] = u'\0';
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}
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if (max) envp[min(envc, max - 1)] = NULL;
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return envc;
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}
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* !ANSI */
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#endif /* COSMOPOLITAN_LIBC_DOSENVIRON_H_ */
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