b, err := io.ReadAll(r)
	w.buf = append(w.buf, b...)
	w.readFromBytes += len(b)
	return int64(len(b)), err
}

// Test that calling (*Writer).ReadFrom with a partially-filled buffer
// fills the buffer before switching over to ReadFrom.
func TestWriterReadFromWithBufferedData(t *testing.T) {
	const bufsize = 16

	input := createTestInput(64)
	rfw := &readFromWriter{}

pkg syscall (linux-386), const CLONE_DETACHED = 4194304
pkg syscall (linux-386), const CLONE_DETACHED ideal-int
pkg syscall (linux-386), const CLONE_FILES = 1024
pkg syscall (linux-386), const CLONE_FILES ideal-int
pkg syscall (linux-386), const CLONE_FS = 512
pkg syscall (linux-386), const CLONE_FS ideal-int
pkg syscall (linux-386), const CLONE_IO = 2147483648

pkg syscall (freebsd-riscv64), type RtMetrics struct #53466
pkg syscall (freebsd-riscv64), type RtMetrics struct, Expire uint64 #53466
pkg syscall (freebsd-riscv64), type RtMetrics struct, Filler [3]uint64 #53466
pkg syscall (freebsd-riscv64), type RtMetrics struct, Hopcount uint64 #53466
pkg syscall (freebsd-riscv64), type RtMetrics struct, Locks uint64 #53466

		return
	}

	f.formatOctal(b, 0) // Last resort, just write zero
	f.err = ErrFieldTooLong
}

func (p *parser) parseOctal(b []byte) int64 {
	// Because unused fields are filled with NULs, we need
	// to skip leading NULs. Fields may also be padded with
	// spaces or NULs.
	// So we remove leading and trailing NULs and spaces to
	// be sure.
	b = bytes.Trim(b, " \x00")

		if n.Kind == "type" && typedef[n.Mangle] == nil {
			typedef[n.Mangle] = n.Type
		}
	}
}

// mangleName does name mangling to translate names
// from the original Go source files to the names
// used in the final Go files generated by cgo.
func (p *Package) mangleName(n *Name) {
	// When using gccgo variables have to be
	// exported so that they become global symbols
	// that the C code can refer to.
	prefix := "_C"

pkg syscall (darwin-arm64), type RtMetrics struct
pkg syscall (darwin-arm64), type RtMetrics struct, Expire int32
pkg syscall (darwin-arm64), type RtMetrics struct, Filler [4]uint32
pkg syscall (darwin-arm64), type RtMetrics struct, Hopcount uint32
pkg syscall (darwin-arm64), type RtMetrics struct, Locks uint32
pkg syscall (darwin-arm64), type RtMetrics struct, Mtu uint32

pkg syscall (freebsd-arm64), type RtMetrics struct
pkg syscall (freebsd-arm64), type RtMetrics struct, Expire uint64
pkg syscall (freebsd-arm64), type RtMetrics struct, Filler [3]uint64
pkg syscall (freebsd-arm64), type RtMetrics struct, Hopcount uint64
pkg syscall (freebsd-arm64), type RtMetrics struct, Locks uint64
pkg syscall (freebsd-arm64), type RtMetrics struct, Mtu uint64

pkg syscall (darwin-386), type RtMetrics struct
pkg syscall (darwin-386), type RtMetrics struct, Expire int32
pkg syscall (darwin-386), type RtMetrics struct, Filler [4]uint32
pkg syscall (darwin-386), type RtMetrics struct, Hopcount uint32
pkg syscall (darwin-386), type RtMetrics struct, Locks uint32
pkg syscall (darwin-386), type RtMetrics struct, Mtu uint32

	// Externally, Next iterates through the tar archive as if it is a series of
	// files. Internally, the tar format often uses fake "files" to add meta
	// data that describes the next file. These meta data "files" should not
	// normally be visible to the outside. As such, this loop iterates through
	// one or more "header files" until it finds a "normal file".
	format := FormatUSTAR | FormatPAX | FormatGNU
	for {

Instead, a separate tool, cgo, processes it to produce three output
files.  The first two, 6g.go and 6c.c, are a Go source file for 6g and
a C source file for 6c; both compile as part of the named package
(gmp, in this example).  The third, gcc.c, is a C source file for gcc;
it compiles into a shared object (.so) that is dynamically linked into
any 6.out that imports the first two files.

The stanza

	// #include <gmp.h>
	import "C"