"cmd/go/internal/mmap"
)

// An ActionID is a cache action key, the hash of a complete description of a
// repeatable computation (command line, environment variables,
// input file contents, executable contents).
type ActionID [HashSize]byte

// An OutputID is a cache output key, the hash of an output of a computation.
type OutputID [HashSize]byte

// Cache is the interface as used by the cmd/go.

	doc, err := ExtractDoc(content, name)
	if err != nil {
		panic(err)
	}
	return doc
}

// ExtractDoc extracts a section of a package doc comment from the
// provided contents of an analyzer package's doc.go file.
//
// A section is a portion of the comment between one heading and
// the next, using this form:
//
//	# Analyzer NAME
//
//	NAME: SUMMARY
//
//	Full description...

//go:build unix || js || wasip1

package net

import (
	"context"
	"internal/bytealg"
	"sync"
)

var onceReadProtocols sync.Once

// readProtocols loads contents of /etc/protocols into protocols map
// for quick access.
func readProtocols() {
	file, err := open("/etc/protocols")
	if err != nil {
		return
	}
	defer file.close()

		updateIEEE = func(crc uint32, p []byte) uint32 {
			return slicingUpdate(crc, ieeeTable8, p)
		}
	}
}

// MakeTable returns a [Table] constructed from the specified polynomial.
// The contents of this [Table] must not be modified.
func MakeTable(poly uint32) *Table {
	switch poly {
	case IEEE:
		ieeeOnce.Do(ieeeInit)
		return IEEETable
	case Castagnoli:
		castagnoliOnce.Do(castagnoliInit)

			// invariant: s contains the values live at the start of b (excluding phi inputs)
			for i, e := range b.Preds {
				p := e.b
				t.clear()
				t.addAll(s.live[p.ID])
				t.addAll(live.contents())
				t.addAll(spillLive[p.ID])
				for _, v := range phis {
					a := v.Args[i]
					if s.values[a.ID].needSlot {
						t.add(a.ID)
					}
					if spill := s.values[a.ID].spill; spill != nil {

	n++
	dwrite(unsafe.Pointer(&buf), uintptr(n))
}

func dumpbool(b bool) {
	if b {
		dumpint(1)
	} else {
		dumpint(0)
	}
}

// dump varint uint64 length followed by memory contents.
func dumpmemrange(data unsafe.Pointer, len uintptr) {
	dumpint(uint64(len))
	dwrite(data, len)
}

func dumpslice(b []byte) {
	dumpint(uint64(len(b)))
	if len(b) > 0 {

[cgo] go run ../print_line_comments.go compiled_cgo_sources.txt
[cgo] stdout $GOPATH[/\\]src[/\\]m[/\\]cgo_hello_replace[/\\]cgo_hello_replace.go
[cgo] ! stdout $GOPATH[/\\]src[/\\]m[/\\]overlay[/\\]hello.c

# Change the contents of a file in the overlay and ensure that makes the target stale
env OLD_GOCACHE=$GOCACHE
env GOCACHE=$WORK/cache  # use a fresh cache so that multiple runs of the test don't interfere
go build -x -overlay overlay.json ./test_cache

}

// CounterVisitorFn describes a callback function invoked when writing
// coverage counter data.
type CounterVisitorFn func(pkid uint32, funcid uint32, counters []uint32) error

// Write writes the contents of the count-data file to the writer
// previously supplied to NewCoverageDataWriter. Returns an error
// if something went wrong somewhere with the write.

		}
		r := io.NewSectionReader(f, fh.tmpoff, fh.Size)
		return sectionReadCloser{r, f}, nil
	}
	return os.Open(fh.tmpfile)
}

// File is an interface to access the file part of a multipart message.
// Its contents may be either stored in memory or on disk.
// If stored on disk, the File's underlying concrete type will be an *os.File.
type File interface {
	io.Reader
	io.ReaderAt
	io.Seeker
	io.Closer
}

	rv[6] &= 0xcf
	rv[6] |= 0x30
	rv[8] &= 0x3f
	rv[8] |= 0xc0

	return rv
}

// machoRewriteUuid copies over the contents of the Macho executable
// exef into the output file outexe, and in the process updates the
// LC_UUID command to a new value recomputed from the Go build id.