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Add pseudoteletypewriter to emulator

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https://justine.storage.googleapis.com/emulator628.mp4
This commit is contained in:
Justine Tunney 2020-08-26 23:08:08 -07:00
parent e86cff8ba0
commit 5aabacb361
94 changed files with 3245 additions and 2179 deletions
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55
tool/build/lib/fds.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/log/check.h"
#include "libc/mem/mem.h"
#include "libc/x/x.h"
#include "tool/build/lib/fds.h"
int MachineFdAdd(struct MachineFds *mf) {
int fd;
struct MachineFdClosed *closed;
if ((closed = mf->closed)) {
DCHECK_LT(closed->fd, mf->i);
fd = closed->fd;
mf->closed = closed->next;
free(closed);
} else {
DCHECK_LE(mf->i, mf->n);
if (mf->i == mf->n) {
if (!grow(&mf->p, &mf->n, sizeof(struct MachineFd), 0)) {
return -1;
}
}
fd = mf->i++;
}
return fd;
}
void MachineFdRemove(struct MachineFds *mf, int fd) {
struct MachineFdClosed *closed;
DCHECK_GE(fd, 0);
DCHECK_LT(fd, mf->i);
mf->p[fd].cb = NULL;
if ((closed = malloc(sizeof(struct MachineFdClosed)))) {
closed->fd = fd;
closed->next = mf->closed;
mf->closed = closed;
}
}