cosmopolitan/libc/testlib/formatint.c
2024-07-21 15:54:17 -07:00

64 lines
2.8 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/atomic.h"
#include "libc/ctype.h"
#include "libc/fmt/itoa.h"
#include "libc/fmt/magnumstrs.internal.h"
#include "libc/intrin/atomic.h"
#include "libc/str/str.h"
#define STRS 4
#define BYTES 128
static atomic_uint bufi;
static char bufs[STRS][BYTES];
char *testlib_formatint(intptr_t x) {
int i = atomic_fetch_add(&bufi, 1) % STRS;
char *p = bufs[i];
p = FormatInt64(p, x);
p = stpcpy(p, " (or ");
p = FormatHex64(p, x, 1);
if (0 <= x && x <= 255) {
p = stpcpy(p, " or '");
if (!isascii(x) || iscntrl(x)) {
*p++ = '\\';
if (x > 7) {
if (x > 070) {
*p++ = '0' + ((x & 0700) >> 6);
}
*p++ = '0' + ((x & 070) >> 3);
}
*p++ = '0' + (x & 7);
} else if (x == '\\' || x == '\'') {
*p++ = '\\';
*p++ = x;
} else {
*p++ = x;
}
*p++ = '\'';
}
if (_strerrno(x)) {
p = stpcpy(p, " or ");
p = stpcpy(p, _strerrno(x));
}
*p++ = ')';
*p++ = '\0';
return bufs[i];
}