"cmd/link/internal/ld"
	"cmd/link/internal/loader"
	"cmd/link/internal/sym"
	"debug/elf"
	"log"
)

func gentext(ctxt *ld.Link, ldr *loader.Loader) {
	if ctxt.DynlinkingGo() {
		// We need get_pc_thunk.
	} else {
		switch ctxt.BuildMode {
		case ld.BuildModeCArchive:
			if !ctxt.IsELF {
				return
			}
		case ld.BuildModePIE, ld.BuildModeCShared, ld.BuildModePlugin:
			// We need get_pc_thunk.
		default:

			hi20Syms = append(hi20Syms, sb.Sym())
		}
	}
	ctxt.Textp = append(ctxt.Textp, hi20Syms...)
	ldr.SortSyms(ctxt.Textp)
}

func findHI20Symbol(ctxt *ld.Link, ldr *loader.Loader, val int64) loader.Sym {
	idx := sort.Search(len(ctxt.Textp), func(i int) bool { return ldr.SymValue(ctxt.Textp[i]) >= val })
	if idx >= len(ctxt.Textp) {
		return 0
	}
	if s := ctxt.Textp[idx]; ldr.SymValue(s) == val && ldr.SymType(s) == sym.STEXT {

	}
	return str
}

func decodetypeGcmask(ctxt *Link, s loader.Sym) []byte {
	if ctxt.loader.SymType(s) == sym.SDYNIMPORT {
		symData := ctxt.loader.Data(s)
		addr := decodetypeGcprogShlib(ctxt, symData)
		ptrdata := decodetypePtrdata(ctxt.Arch, symData)
		sect := findShlibSection(ctxt, ctxt.loader.SymPkg(s), addr)
		if sect != nil {
			bits := ptrdata / int64(ctxt.Arch.PtrSize)
			r := make([]byte, (bits+7)/8)

// emits a relocation with the method name. Matching methods are kept in all
// reachable types.
//
// Any unreached text symbols are removed from ctxt.Textp.
func deadcode(ctxt *Link) {
	ldr := ctxt.loader
	d := deadcodePass{ctxt: ctxt, ldr: ldr}
	d.init()
	d.flood()

	if ctxt.DynlinkingGo() {
		// Exported methods may satisfy interfaces we don't know
		// about yet when dynamically linking.
		d.reflectSeen = true
	}

			}

		case *AssignStmt:
			if s.Op == Def {
				recordVarDecl(s.Pos(), s.Lhs)
			}

		case *BlockStmt:
			inner := targets{ctxt.breaks, ctxt.continues, -1}
			innerBlock(inner, s.Pos(), s.List)

		case *IfStmt:
			inner := targets{ctxt.breaks, ctxt.continues, -1}
			innerBlock(inner, s.Then.Pos(), s.Then.List)
			if s.Else != nil {
				innerBlock(inner, s.Else.Pos(), []Stmt{s.Else})
			}

	return &typeWriter{buf, make(map[Type]bool), qf, nil, nil, true, false, false}
}

func newTypeHasher(buf *bytes.Buffer, ctxt *Context) *typeWriter {
	assert(ctxt != nil)
	return &typeWriter{buf, make(map[Type]bool), nil, ctxt, nil, false, false, false}
}

func (w *typeWriter) byte(b byte) {
	if w.ctxt != nil {
		if b == ' ' {
			b = '#'
		}
		w.buf.WriteByte(b)
		return
	}
	w.buf.WriteByte(b)

}

func TestMatchFile(t *testing.T) {
	for _, tt := range matchFileTests {
		ctxt := tt.ctxt
		ctxt.OpenFile = func(path string) (r io.ReadCloser, err error) {
			if path != "x+"+tt.name {
				t.Fatalf("OpenFile asked for %q, expected %q", path, "x+"+tt.name)
			}
			return &readNopCloser{strings.NewReader(tt.data)}, nil
		}
		ctxt.JoinPath = func(elem ...string) string {
			return strings.Join(elem, "+")
		}

	// recorded in expanding.inst.ctxt.
	var ctxts []*Context
	if expanding != nil {
		ctxts = append(ctxts, expanding.inst.ctxt)
	}
	if ctxt != nil {
		ctxts = append(ctxts, ctxt)
	}
	assert(len(ctxts) > 0)

	// Compute all hashes; hashes may differ across contexts due to different
	// unique IDs for Named types within the hasher.
	hashes := make([]string, len(ctxts))
	for i, ctxt := range ctxts {

				c.cursym.Func().FuncFlag |= abi.FuncFlagSPWrite
				if ctxt.Debugvlog || !ctxt.IsAsm {
					ctxt.Logf("auto-SPWRITE: %s %v\n", c.cursym.Name, p)
					if !ctxt.IsAsm {
						ctxt.Diag("invalid auto-SPWRITE in non-assembly")
						ctxt.DiagFlush()
						log.Fatalf("bad SPWRITE")
					}
				}
			}
		}
	}

	if c.ctxt.Arch.Family == sys.MIPS {

		}
		ctxt.MemLimit = mlimit
	} else {
		ctxt.MemLimit = memAvailable
	}

	if memAvailable < ctxt.MemLimit {
		ctxt.MemLimit = memAvailable
	}

	ctxt.FTP = ctx.StringSlice("ftp")
	ctxt.SFTP = ctx.StringSlice("sftp")
	ctxt.Interface = ctx.String("interface")
	ctxt.UserTimeout = ctx.Duration("conn-user-timeout")
	ctxt.SendBufSize = ctx.Int("send-buf-size")