cosmopolitan/dsp/tty/itoa8.c

49 lines
2.5 KiB
C

/*-*- 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 "dsp/tty/itoa8.h"
#include "libc/bits/bits.h"
#include "libc/bits/initializer.internal.h"
#include "libc/str/str.h"
struct Itoa8 kItoa8;
static textstartup void itoa8_init(void) {
int i;
uint8_t z;
uint32_t w;
for (i = 0; i < 256; ++i) {
if (i < 10) {
z = 1;
w = '0' + i;
} else if (i < 100) {
z = 2;
w = ('0' + i / 10) | ('0' + i % 10) << 8;
} else {
z = 3;
w = ('0' + i / 100) | ('0' + i % 100 / 10) << 8 |
('0' + i % 100 % 10) << 16;
}
kItoa8.size[i] = z;
kItoa8.data[i] = w;
}
}
const void *const itoa8_init_ctor[] initarray = {itoa8_init};