#includes and processing the corresponding C code. That would require
a full C parser and type checker that was also aware of any extensions
known to the system compiler (for example, all the GNU C extensions) as
well as the system-specific header locations and system-specific
pre-#defined macros. This is certainly possible to do, but it is an
enormous amount of work.

Cgo takes a different approach. It determines the meaning of C

	MSR	R6, AMEVTYPER02_EL0                              // ERROR "system register is not writable"
	MSR	R6, AMEVTYPER03_EL0                              // ERROR "system register is not writable"
	MSR	R6, AMEVTYPER04_EL0                              // ERROR "system register is not writable"
	MSR	R6, AMEVTYPER05_EL0                              // ERROR "system register is not writable"

	//
	// By specification, the only other encoding permitted should be CP-437,
	// but historically many ZIP readers interpret Name and Comment as whatever
	// the system's local character encoding happens to be.
	//
	// This flag should only be set if the user intends to encode a non-portable
	// ZIP file for a specific localized region. Otherwise, the Writer

	case TypeFifo:
		mode |= fs.ModeNamedPipe
	}

	return mode
}

func (fi headerFileInfo) String() string {
	return fs.FormatFileInfo(fi)
}

// sysStat, if non-nil, populates h from system-dependent fields of fi.
var sysStat func(fi fs.FileInfo, h *Header, doNameLookups bool) error

const (
	// Mode constants from the USTAR spec:

	for i := arm64.REG_F0; i <= arm64.REG_F31; i++ {
		register[obj.Rconv(i)] = int16(i)
	}
	for i := arm64.REG_V0; i <= arm64.REG_V31; i++ {
		register[obj.Rconv(i)] = int16(i)
	}

	// System registers.
	for i := 0; i < len(arm64.SystemReg); i++ {
		register[arm64.SystemReg[i].Name] = arm64.SystemReg[i].Reg
	}

	register["LR"] = arm64.REGLINK

	// Pseudo-registers.
	register["SB"] = RSB

register, even on architectures with a hardware frame pointer.
</p>

<p>
For assembly functions with Go prototypes, <code>go</code> <code>vet</code> will check that the argument names
and offsets match.
On 32-bit systems, the low and high 32 bits of a 64-bit value are distinguished by adding
a <code>_lo</code> or <code>_hi</code> suffix to the name, as in <code>arg_lo+0(FP)</code> or <code>arg_hi+4(FP)</code>.

      now read directory entries in batches to reduce the number of system calls,
      improving performance up to 30%.
    </p>

    <p><!-- https://go.dev/issue/58808 -->
      When <a href="/pkg/io#Copy"><code>io.Copy</code></a> copies
      from a <code>File</code> to a <code>net.UnixConn</code>,
      it will now use Linux's <code>sendfile(2)</code> system call if possible,

func detectUTF8(s string) (valid, require bool) {
	for i := 0; i < len(s); {
		r, size := utf8.DecodeRuneInString(s[i:])
		i += size
		// Officially, ZIP uses CP-437, but many readers use the system's
		// local character encoding. Most encoding are compatible with a large
		// subset of CP-437, which itself is ASCII-like.
		//
		// Forbid 0x7e and 0x5c since EUC-KR and Shift-JIS replace those

		}
	}
	if s.Err() != nil {
		t.Fatal("after scan:", s.Err())
	}
}

// negativeEOFReader returns an invalid -1 at the end, as though it
// were wrapping the read system call.
type negativeEOFReader int

func (r *negativeEOFReader) Read(p []byte) (int, error) {
	if *r > 0 {
		c := int(*r)
		if c > len(p) {
			c = len(p)
		}
		for i := 0; i < c; i++ {

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// This wrapper uses syscall.Flock to prevent concurrent adb commands,
// so for now it only builds on platforms that support that system call.
// TODO(#33974): use a more portable library for file locking.

//go:build darwin || dragonfly || freebsd || illumos || linux || netbsd || openbsd

// This program can be used as go_android_GOARCH_exec by the Go tool.