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Introduce native support for MacOS ARM64

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There's a new program named ape/ape-m1.c which will be used to build an
embeddable binary that can load ape and elf executables. The support is
mostly working so far, but still chasing down ABI issues.
This commit is contained in:
Justine Tunney 2023-05-18 19:05:08 -07:00
parent b852650c08
commit 1422e96b4e
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GPG key ID: BE714B4575D6E328
757 changed files with 2988 additions and 1321 deletions
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56
libc/str/strlcpy.c
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@ -1,7 +1,7 @@
/*-*- 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│
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org> │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
@ -16,27 +16,43 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/safemacros.internal.h"
#include "libc/macros.internal.h"
#include "libc/str/str.h"
// clang-format off
// $OpenBSD: strlcpy.c,v 1.16 2019/01/25 00:19:25 millert Exp $
asm(".ident\t\"\\n\\n\
OpenBSD Strings (ISC)\\n\
Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>\"");
asm(".include \"libc/disclaimer.inc\"");
/**
* Copies string, the BSD way.
*
* @param d is buffer which needn't be initialized
* @param s is a NUL-terminated string
* @param n is byte capacity of d
* @return strlen(s)
* @note d and s can't overlap
* @note we prefer memccpy()
* Copy string src to buffer `dst` of size `dsize`. At most `dsize-1`
* chars will be copied. Always NUL terminates (unless `dsize == 0`).
* Returns `strlen(src)`; if `retval >= dsize`, truncation occurred.
*/
size_t strlcpy(char *d, const char *s, size_t n) {
size_t slen, actual;
slen = strlen(s);
if (n) {
actual = MIN(n - 1, slen);
memcpy(d, s, actual);
d[actual] = '\0';
}
return slen;
size_t
strlcpy(char *dst, const char *src, size_t dsize)
{
const char *osrc = src;
size_t nleft = dsize;
/* Copy as many bytes as will fit. */
if (nleft != 0) {
while (--nleft != 0) {
if ((*dst++ = *src++) == '\0')
break;
}
}
/* Not enough room in dst, add NUL and traverse rest of src. */
if (nleft == 0) {
if (dsize != 0)
*dst = '\0'; /* NUL-terminate dst */
while (*src++)
;
}
return(src - osrc - 1); /* count does not include NUL */
}