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-rw-r--r--vendor/golang.org/x/text/collate/build/builder.go702
-rw-r--r--vendor/golang.org/x/text/collate/build/colelem.go294
-rw-r--r--vendor/golang.org/x/text/collate/build/contract.go309
-rw-r--r--vendor/golang.org/x/text/collate/build/order.go393
-rw-r--r--vendor/golang.org/x/text/collate/build/table.go81
-rw-r--r--vendor/golang.org/x/text/collate/build/trie.go290
6 files changed, 2069 insertions, 0 deletions
diff --git a/vendor/golang.org/x/text/collate/build/builder.go b/vendor/golang.org/x/text/collate/build/builder.go
new file mode 100644
index 0000000..1104284
--- /dev/null
+++ b/vendor/golang.org/x/text/collate/build/builder.go
@@ -0,0 +1,702 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package build // import "golang.org/x/text/collate/build"
+
+import (
+ "fmt"
+ "io"
+ "log"
+ "sort"
+ "strings"
+ "unicode/utf8"
+
+ "golang.org/x/text/internal/colltab"
+ "golang.org/x/text/language"
+ "golang.org/x/text/unicode/norm"
+)
+
+// TODO: optimizations:
+// - expandElem is currently 20K. By putting unique colElems in a separate
+// table and having a byte array of indexes into this table, we can reduce
+// the total size to about 7K. By also factoring out the length bytes, we
+// can reduce this to about 6K.
+// - trie valueBlocks are currently 100K. There are a lot of sparse blocks
+// and many consecutive values with the same stride. This can be further
+// compacted.
+// - Compress secondary weights into 8 bits.
+// - Some LDML specs specify a context element. Currently we simply concatenate
+// those. Context can be implemented using the contraction trie. If Builder
+// could analyze and detect when using a context makes sense, there is no
+// need to expose this construct in the API.
+
+// A Builder builds a root collation table. The user must specify the
+// collation elements for each entry. A common use will be to base the weights
+// on those specified in the allkeys* file as provided by the UCA or CLDR.
+type Builder struct {
+ index *trieBuilder
+ root ordering
+ locale []*Tailoring
+ t *table
+ err error
+ built bool
+
+ minNonVar int // lowest primary recorded for a variable
+ varTop int // highest primary recorded for a non-variable
+
+ // indexes used for reusing expansions and contractions
+ expIndex map[string]int // positions of expansions keyed by their string representation
+ ctHandle map[string]ctHandle // contraction handles keyed by a concatenation of the suffixes
+ ctElem map[string]int // contraction elements keyed by their string representation
+}
+
+// A Tailoring builds a collation table based on another collation table.
+// The table is defined by specifying tailorings to the underlying table.
+// See http://unicode.org/reports/tr35/ for an overview of tailoring
+// collation tables. The CLDR contains pre-defined tailorings for a variety
+// of languages (See http://www.unicode.org/Public/cldr/<version>/core.zip.)
+type Tailoring struct {
+ id string
+ builder *Builder
+ index *ordering
+
+ anchor *entry
+ before bool
+}
+
+// NewBuilder returns a new Builder.
+func NewBuilder() *Builder {
+ return &Builder{
+ index: newTrieBuilder(),
+ root: makeRootOrdering(),
+ expIndex: make(map[string]int),
+ ctHandle: make(map[string]ctHandle),
+ ctElem: make(map[string]int),
+ }
+}
+
+// Tailoring returns a Tailoring for the given locale. One should
+// have completed all calls to Add before calling Tailoring.
+func (b *Builder) Tailoring(loc language.Tag) *Tailoring {
+ t := &Tailoring{
+ id: loc.String(),
+ builder: b,
+ index: b.root.clone(),
+ }
+ t.index.id = t.id
+ b.locale = append(b.locale, t)
+ return t
+}
+
+// Add adds an entry to the collation element table, mapping
+// a slice of runes to a sequence of collation elements.
+// A collation element is specified as list of weights: []int{primary, secondary, ...}.
+// The entries are typically obtained from a collation element table
+// as defined in http://www.unicode.org/reports/tr10/#Data_Table_Format.
+// Note that the collation elements specified by colelems are only used
+// as a guide. The actual weights generated by Builder may differ.
+// The argument variables is a list of indices into colelems that should contain
+// a value for each colelem that is a variable. (See the reference above.)
+func (b *Builder) Add(runes []rune, colelems [][]int, variables []int) error {
+ str := string(runes)
+ elems := make([]rawCE, len(colelems))
+ for i, ce := range colelems {
+ if len(ce) == 0 {
+ break
+ }
+ elems[i] = makeRawCE(ce, 0)
+ if len(ce) == 1 {
+ elems[i].w[1] = defaultSecondary
+ }
+ if len(ce) <= 2 {
+ elems[i].w[2] = defaultTertiary
+ }
+ if len(ce) <= 3 {
+ elems[i].w[3] = ce[0]
+ }
+ }
+ for i, ce := range elems {
+ p := ce.w[0]
+ isvar := false
+ for _, j := range variables {
+ if i == j {
+ isvar = true
+ }
+ }
+ if isvar {
+ if p >= b.minNonVar && b.minNonVar > 0 {
+ return fmt.Errorf("primary value %X of variable is larger than the smallest non-variable %X", p, b.minNonVar)
+ }
+ if p > b.varTop {
+ b.varTop = p
+ }
+ } else if p > 1 { // 1 is a special primary value reserved for FFFE
+ if p <= b.varTop {
+ return fmt.Errorf("primary value %X of non-variable is smaller than the highest variable %X", p, b.varTop)
+ }
+ if b.minNonVar == 0 || p < b.minNonVar {
+ b.minNonVar = p
+ }
+ }
+ }
+ elems, err := convertLargeWeights(elems)
+ if err != nil {
+ return err
+ }
+ cccs := []uint8{}
+ nfd := norm.NFD.String(str)
+ for i := range nfd {
+ cccs = append(cccs, norm.NFD.PropertiesString(nfd[i:]).CCC())
+ }
+ if len(cccs) < len(elems) {
+ if len(cccs) > 2 {
+ return fmt.Errorf("number of decomposed characters should be greater or equal to the number of collation elements for len(colelems) > 3 (%d < %d)", len(cccs), len(elems))
+ }
+ p := len(elems) - 1
+ for ; p > 0 && elems[p].w[0] == 0; p-- {
+ elems[p].ccc = cccs[len(cccs)-1]
+ }
+ for ; p >= 0; p-- {
+ elems[p].ccc = cccs[0]
+ }
+ } else {
+ for i := range elems {
+ elems[i].ccc = cccs[i]
+ }
+ }
+ // doNorm in collate.go assumes that the following conditions hold.
+ if len(elems) > 1 && len(cccs) > 1 && cccs[0] != 0 && cccs[0] != cccs[len(cccs)-1] {
+ return fmt.Errorf("incompatible CCC values for expansion %X (%d)", runes, cccs)
+ }
+ b.root.newEntry(str, elems)
+ return nil
+}
+
+func (t *Tailoring) setAnchor(anchor string) error {
+ anchor = norm.NFC.String(anchor)
+ a := t.index.find(anchor)
+ if a == nil {
+ a = t.index.newEntry(anchor, nil)
+ a.implicit = true
+ a.modified = true
+ for _, r := range []rune(anchor) {
+ e := t.index.find(string(r))
+ e.lock = true
+ }
+ }
+ t.anchor = a
+ return nil
+}
+
+// SetAnchor sets the point after which elements passed in subsequent calls to
+// Insert will be inserted. It is equivalent to the reset directive in an LDML
+// specification. See Insert for an example.
+// SetAnchor supports the following logical reset positions:
+// <first_tertiary_ignorable/>, <last_teriary_ignorable/>, <first_primary_ignorable/>,
+// and <last_non_ignorable/>.
+func (t *Tailoring) SetAnchor(anchor string) error {
+ if err := t.setAnchor(anchor); err != nil {
+ return err
+ }
+ t.before = false
+ return nil
+}
+
+// SetAnchorBefore is similar to SetAnchor, except that subsequent calls to
+// Insert will insert entries before the anchor.
+func (t *Tailoring) SetAnchorBefore(anchor string) error {
+ if err := t.setAnchor(anchor); err != nil {
+ return err
+ }
+ t.before = true
+ return nil
+}
+
+// Insert sets the ordering of str relative to the entry set by the previous
+// call to SetAnchor or Insert. The argument extend corresponds
+// to the extend elements as defined in LDML. A non-empty value for extend
+// will cause the collation elements corresponding to extend to be appended
+// to the collation elements generated for the entry added by Insert.
+// This has the same net effect as sorting str after the string anchor+extend.
+// See http://www.unicode.org/reports/tr10/#Tailoring_Example for details
+// on parametric tailoring and http://unicode.org/reports/tr35/#Collation_Elements
+// for full details on LDML.
+//
+// Examples: create a tailoring for Swedish, where "ä" is ordered after "z"
+// at the primary sorting level:
+// t := b.Tailoring("se")
+// t.SetAnchor("z")
+// t.Insert(colltab.Primary, "ä", "")
+// Order "ü" after "ue" at the secondary sorting level:
+// t.SetAnchor("ue")
+// t.Insert(colltab.Secondary, "ü","")
+// or
+// t.SetAnchor("u")
+// t.Insert(colltab.Secondary, "ü", "e")
+// Order "q" afer "ab" at the secondary level and "Q" after "q"
+// at the tertiary level:
+// t.SetAnchor("ab")
+// t.Insert(colltab.Secondary, "q", "")
+// t.Insert(colltab.Tertiary, "Q", "")
+// Order "b" before "a":
+// t.SetAnchorBefore("a")
+// t.Insert(colltab.Primary, "b", "")
+// Order "0" after the last primary ignorable:
+// t.SetAnchor("<last_primary_ignorable/>")
+// t.Insert(colltab.Primary, "0", "")
+func (t *Tailoring) Insert(level colltab.Level, str, extend string) error {
+ if t.anchor == nil {
+ return fmt.Errorf("%s:Insert: no anchor point set for tailoring of %s", t.id, str)
+ }
+ str = norm.NFC.String(str)
+ e := t.index.find(str)
+ if e == nil {
+ e = t.index.newEntry(str, nil)
+ } else if e.logical != noAnchor {
+ return fmt.Errorf("%s:Insert: cannot reinsert logical reset position %q", t.id, e.str)
+ }
+ if e.lock {
+ return fmt.Errorf("%s:Insert: cannot reinsert element %q", t.id, e.str)
+ }
+ a := t.anchor
+ // Find the first element after the anchor which differs at a level smaller or
+ // equal to the given level. Then insert at this position.
+ // See http://unicode.org/reports/tr35/#Collation_Elements, Section 5.14.5 for details.
+ e.before = t.before
+ if t.before {
+ t.before = false
+ if a.prev == nil {
+ a.insertBefore(e)
+ } else {
+ for a = a.prev; a.level > level; a = a.prev {
+ }
+ a.insertAfter(e)
+ }
+ e.level = level
+ } else {
+ for ; a.level > level; a = a.next {
+ }
+ e.level = a.level
+ if a != e {
+ a.insertAfter(e)
+ a.level = level
+ } else {
+ // We don't set a to prev itself. This has the effect of the entry
+ // getting new collation elements that are an increment of itself.
+ // This is intentional.
+ a.prev.level = level
+ }
+ }
+ e.extend = norm.NFD.String(extend)
+ e.exclude = false
+ e.modified = true
+ e.elems = nil
+ t.anchor = e
+ return nil
+}
+
+func (o *ordering) getWeight(e *entry) []rawCE {
+ if len(e.elems) == 0 && e.logical == noAnchor {
+ if e.implicit {
+ for _, r := range e.runes {
+ e.elems = append(e.elems, o.getWeight(o.find(string(r)))...)
+ }
+ } else if e.before {
+ count := [colltab.Identity + 1]int{}
+ a := e
+ for ; a.elems == nil && !a.implicit; a = a.next {
+ count[a.level]++
+ }
+ e.elems = []rawCE{makeRawCE(a.elems[0].w, a.elems[0].ccc)}
+ for i := colltab.Primary; i < colltab.Quaternary; i++ {
+ if count[i] != 0 {
+ e.elems[0].w[i] -= count[i]
+ break
+ }
+ }
+ if e.prev != nil {
+ o.verifyWeights(e.prev, e, e.prev.level)
+ }
+ } else {
+ prev := e.prev
+ e.elems = nextWeight(prev.level, o.getWeight(prev))
+ o.verifyWeights(e, e.next, e.level)
+ }
+ }
+ return e.elems
+}
+
+func (o *ordering) addExtension(e *entry) {
+ if ex := o.find(e.extend); ex != nil {
+ e.elems = append(e.elems, ex.elems...)
+ } else {
+ for _, r := range []rune(e.extend) {
+ e.elems = append(e.elems, o.find(string(r)).elems...)
+ }
+ }
+ e.extend = ""
+}
+
+func (o *ordering) verifyWeights(a, b *entry, level colltab.Level) error {
+ if level == colltab.Identity || b == nil || b.elems == nil || a.elems == nil {
+ return nil
+ }
+ for i := colltab.Primary; i < level; i++ {
+ if a.elems[0].w[i] < b.elems[0].w[i] {
+ return nil
+ }
+ }
+ if a.elems[0].w[level] >= b.elems[0].w[level] {
+ err := fmt.Errorf("%s:overflow: collation elements of %q (%X) overflows those of %q (%X) at level %d (%X >= %X)", o.id, a.str, a.runes, b.str, b.runes, level, a.elems, b.elems)
+ log.Println(err)
+ // TODO: return the error instead, or better, fix the conflicting entry by making room.
+ }
+ return nil
+}
+
+func (b *Builder) error(e error) {
+ if e != nil {
+ b.err = e
+ }
+}
+
+func (b *Builder) errorID(locale string, e error) {
+ if e != nil {
+ b.err = fmt.Errorf("%s:%v", locale, e)
+ }
+}
+
+// patchNorm ensures that NFC and NFD counterparts are consistent.
+func (o *ordering) patchNorm() {
+ // Insert the NFD counterparts, if necessary.
+ for _, e := range o.ordered {
+ nfd := norm.NFD.String(e.str)
+ if nfd != e.str {
+ if e0 := o.find(nfd); e0 != nil && !e0.modified {
+ e0.elems = e.elems
+ } else if e.modified && !equalCEArrays(o.genColElems(nfd), e.elems) {
+ e := o.newEntry(nfd, e.elems)
+ e.modified = true
+ }
+ }
+ }
+ // Update unchanged composed forms if one of their parts changed.
+ for _, e := range o.ordered {
+ nfd := norm.NFD.String(e.str)
+ if e.modified || nfd == e.str {
+ continue
+ }
+ if e0 := o.find(nfd); e0 != nil {
+ e.elems = e0.elems
+ } else {
+ e.elems = o.genColElems(nfd)
+ if norm.NFD.LastBoundary([]byte(nfd)) == 0 {
+ r := []rune(nfd)
+ head := string(r[0])
+ tail := ""
+ for i := 1; i < len(r); i++ {
+ s := norm.NFC.String(head + string(r[i]))
+ if e0 := o.find(s); e0 != nil && e0.modified {
+ head = s
+ } else {
+ tail += string(r[i])
+ }
+ }
+ e.elems = append(o.genColElems(head), o.genColElems(tail)...)
+ }
+ }
+ }
+ // Exclude entries for which the individual runes generate the same collation elements.
+ for _, e := range o.ordered {
+ if len(e.runes) > 1 && equalCEArrays(o.genColElems(e.str), e.elems) {
+ e.exclude = true
+ }
+ }
+}
+
+func (b *Builder) buildOrdering(o *ordering) {
+ for _, e := range o.ordered {
+ o.getWeight(e)
+ }
+ for _, e := range o.ordered {
+ o.addExtension(e)
+ }
+ o.patchNorm()
+ o.sort()
+ simplify(o)
+ b.processExpansions(o) // requires simplify
+ b.processContractions(o) // requires simplify
+
+ t := newNode()
+ for e := o.front(); e != nil; e, _ = e.nextIndexed() {
+ if !e.skip() {
+ ce, err := e.encode()
+ b.errorID(o.id, err)
+ t.insert(e.runes[0], ce)
+ }
+ }
+ o.handle = b.index.addTrie(t)
+}
+
+func (b *Builder) build() (*table, error) {
+ if b.built {
+ return b.t, b.err
+ }
+ b.built = true
+ b.t = &table{
+ Table: colltab.Table{
+ MaxContractLen: utf8.UTFMax,
+ VariableTop: uint32(b.varTop),
+ },
+ }
+
+ b.buildOrdering(&b.root)
+ b.t.root = b.root.handle
+ for _, t := range b.locale {
+ b.buildOrdering(t.index)
+ if b.err != nil {
+ break
+ }
+ }
+ i, err := b.index.generate()
+ b.t.trie = *i
+ b.t.Index = colltab.Trie{
+ Index: i.index,
+ Values: i.values,
+ Index0: i.index[blockSize*b.t.root.lookupStart:],
+ Values0: i.values[blockSize*b.t.root.valueStart:],
+ }
+ b.error(err)
+ return b.t, b.err
+}
+
+// Build builds the root Collator.
+func (b *Builder) Build() (colltab.Weighter, error) {
+ table, err := b.build()
+ if err != nil {
+ return nil, err
+ }
+ return table, nil
+}
+
+// Build builds a Collator for Tailoring t.
+func (t *Tailoring) Build() (colltab.Weighter, error) {
+ // TODO: implement.
+ return nil, nil
+}
+
+// Print prints the tables for b and all its Tailorings as a Go file
+// that can be included in the Collate package.
+func (b *Builder) Print(w io.Writer) (n int, err error) {
+ p := func(nn int, e error) {
+ n += nn
+ if err == nil {
+ err = e
+ }
+ }
+ t, err := b.build()
+ if err != nil {
+ return 0, err
+ }
+ p(fmt.Fprintf(w, `var availableLocales = "und`))
+ for _, loc := range b.locale {
+ if loc.id != "und" {
+ p(fmt.Fprintf(w, ",%s", loc.id))
+ }
+ }
+ p(fmt.Fprint(w, "\"\n\n"))
+ p(fmt.Fprintf(w, "const varTop = 0x%x\n\n", b.varTop))
+ p(fmt.Fprintln(w, "var locales = [...]tableIndex{"))
+ for _, loc := range b.locale {
+ if loc.id == "und" {
+ p(t.fprintIndex(w, loc.index.handle, loc.id))
+ }
+ }
+ for _, loc := range b.locale {
+ if loc.id != "und" {
+ p(t.fprintIndex(w, loc.index.handle, loc.id))
+ }
+ }
+ p(fmt.Fprint(w, "}\n\n"))
+ n, _, err = t.fprint(w, "main")
+ return
+}
+
+// reproducibleFromNFKD checks whether the given expansion could be generated
+// from an NFKD expansion.
+func reproducibleFromNFKD(e *entry, exp, nfkd []rawCE) bool {
+ // Length must be equal.
+ if len(exp) != len(nfkd) {
+ return false
+ }
+ for i, ce := range exp {
+ // Primary and secondary values should be equal.
+ if ce.w[0] != nfkd[i].w[0] || ce.w[1] != nfkd[i].w[1] {
+ return false
+ }
+ // Tertiary values should be equal to maxTertiary for third element onwards.
+ // TODO: there seem to be a lot of cases in CLDR (e.g. ㏭ in zh.xml) that can
+ // simply be dropped. Try this out by dropping the following code.
+ if i >= 2 && ce.w[2] != maxTertiary {
+ return false
+ }
+ if _, err := makeCE(ce); err != nil {
+ // Simply return false. The error will be caught elsewhere.
+ return false
+ }
+ }
+ return true
+}
+
+func simplify(o *ordering) {
+ // Runes that are a starter of a contraction should not be removed.
+ // (To date, there is only Kannada character 0CCA.)
+ keep := make(map[rune]bool)
+ for e := o.front(); e != nil; e, _ = e.nextIndexed() {
+ if len(e.runes) > 1 {
+ keep[e.runes[0]] = true
+ }
+ }
+ // Tag entries for which the runes NFKD decompose to identical values.
+ for e := o.front(); e != nil; e, _ = e.nextIndexed() {
+ s := e.str
+ nfkd := norm.NFKD.String(s)
+ nfd := norm.NFD.String(s)
+ if e.decompose || len(e.runes) > 1 || len(e.elems) == 1 || keep[e.runes[0]] || nfkd == nfd {
+ continue
+ }
+ if reproducibleFromNFKD(e, e.elems, o.genColElems(nfkd)) {
+ e.decompose = true
+ }
+ }
+}
+
+// appendExpansion converts the given collation sequence to
+// collation elements and adds them to the expansion table.
+// It returns an index to the expansion table.
+func (b *Builder) appendExpansion(e *entry) int {
+ t := b.t
+ i := len(t.ExpandElem)
+ ce := uint32(len(e.elems))
+ t.ExpandElem = append(t.ExpandElem, ce)
+ for _, w := range e.elems {
+ ce, err := makeCE(w)
+ if err != nil {
+ b.error(err)
+ return -1
+ }
+ t.ExpandElem = append(t.ExpandElem, ce)
+ }
+ return i
+}
+
+// processExpansions extracts data necessary to generate
+// the extraction tables.
+func (b *Builder) processExpansions(o *ordering) {
+ for e := o.front(); e != nil; e, _ = e.nextIndexed() {
+ if !e.expansion() {
+ continue
+ }
+ key := fmt.Sprintf("%v", e.elems)
+ i, ok := b.expIndex[key]
+ if !ok {
+ i = b.appendExpansion(e)
+ b.expIndex[key] = i
+ }
+ e.expansionIndex = i
+ }
+}
+
+func (b *Builder) processContractions(o *ordering) {
+ // Collate contractions per starter rune.
+ starters := []rune{}
+ cm := make(map[rune][]*entry)
+ for e := o.front(); e != nil; e, _ = e.nextIndexed() {
+ if e.contraction() {
+ if len(e.str) > b.t.MaxContractLen {
+ b.t.MaxContractLen = len(e.str)
+ }
+ r := e.runes[0]
+ if _, ok := cm[r]; !ok {
+ starters = append(starters, r)
+ }
+ cm[r] = append(cm[r], e)
+ }
+ }
+ // Add entries of single runes that are at a start of a contraction.
+ for e := o.front(); e != nil; e, _ = e.nextIndexed() {
+ if !e.contraction() {
+ r := e.runes[0]
+ if _, ok := cm[r]; ok {
+ cm[r] = append(cm[r], e)
+ }
+ }
+ }
+ // Build the tries for the contractions.
+ t := b.t
+ for _, r := range starters {
+ l := cm[r]
+ // Compute suffix strings. There are 31 different contraction suffix
+ // sets for 715 contractions and 82 contraction starter runes as of
+ // version 6.0.0.
+ sufx := []string{}
+ hasSingle := false
+ for _, e := range l {
+ if len(e.runes) > 1 {
+ sufx = append(sufx, string(e.runes[1:]))
+ } else {
+ hasSingle = true
+ }
+ }
+ if !hasSingle {
+ b.error(fmt.Errorf("no single entry for starter rune %U found", r))
+ continue
+ }
+ // Unique the suffix set.
+ sort.Strings(sufx)
+ key := strings.Join(sufx, "\n")
+ handle, ok := b.ctHandle[key]
+ if !ok {
+ var err error
+ handle, err = appendTrie(&t.ContractTries, sufx)
+ if err != nil {
+ b.error(err)
+ }
+ b.ctHandle[key] = handle
+ }
+ // Bucket sort entries in index order.
+ es := make([]*entry, len(l))
+ for _, e := range l {
+ var p, sn int
+ if len(e.runes) > 1 {
+ str := []byte(string(e.runes[1:]))
+ p, sn = lookup(&t.ContractTries, handle, str)
+ if sn != len(str) {
+ log.Fatalf("%s: processContractions: unexpected length for '%X'; len=%d; want %d", o.id, e.runes, sn, len(str))
+ }
+ }
+ if es[p] != nil {
+ log.Fatalf("%s: multiple contractions for position %d for rune %U", o.id, p, e.runes[0])
+ }
+ es[p] = e
+ }
+ // Create collation elements for contractions.
+ elems := []uint32{}
+ for _, e := range es {
+ ce, err := e.encodeBase()
+ b.errorID(o.id, err)
+ elems = append(elems, ce)
+ }
+ key = fmt.Sprintf("%v", elems)
+ i, ok := b.ctElem[key]
+ if !ok {
+ i = len(t.ContractElem)
+ b.ctElem[key] = i
+ t.ContractElem = append(t.ContractElem, elems...)
+ }
+ // Store info in entry for starter rune.
+ es[0].contractionIndex = i
+ es[0].contractionHandle = handle
+ }
+}
diff --git a/vendor/golang.org/x/text/collate/build/colelem.go b/vendor/golang.org/x/text/collate/build/colelem.go
new file mode 100644
index 0000000..726fe54
--- /dev/null
+++ b/vendor/golang.org/x/text/collate/build/colelem.go
@@ -0,0 +1,294 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package build
+
+import (
+ "fmt"
+ "unicode"
+
+ "golang.org/x/text/internal/colltab"
+)
+
+const (
+ defaultSecondary = 0x20
+ defaultTertiary = 0x2
+ maxTertiary = 0x1F
+)
+
+type rawCE struct {
+ w []int
+ ccc uint8
+}
+
+func makeRawCE(w []int, ccc uint8) rawCE {
+ ce := rawCE{w: make([]int, 4), ccc: ccc}
+ copy(ce.w, w)
+ return ce
+}
+
+// A collation element is represented as an uint32.
+// In the typical case, a rune maps to a single collation element. If a rune
+// can be the start of a contraction or expands into multiple collation elements,
+// then the collation element that is associated with a rune will have a special
+// form to represent such m to n mappings. Such special collation elements
+// have a value >= 0x80000000.
+
+const (
+ maxPrimaryBits = 21
+ maxSecondaryBits = 12
+ maxTertiaryBits = 8
+)
+
+func makeCE(ce rawCE) (uint32, error) {
+ v, e := colltab.MakeElem(ce.w[0], ce.w[1], ce.w[2], ce.ccc)
+ return uint32(v), e
+}
+
+// For contractions, collation elements are of the form
+// 110bbbbb bbbbbbbb iiiiiiii iiiinnnn, where
+// - n* is the size of the first node in the contraction trie.
+// - i* is the index of the first node in the contraction trie.
+// - b* is the offset into the contraction collation element table.
+// See contract.go for details on the contraction trie.
+const (
+ contractID = 0xC0000000
+ maxNBits = 4
+ maxTrieIndexBits = 12
+ maxContractOffsetBits = 13
+)
+
+func makeContractIndex(h ctHandle, offset int) (uint32, error) {
+ if h.n >= 1<<maxNBits {
+ return 0, fmt.Errorf("size of contraction trie node too large: %d >= %d", h.n, 1<<maxNBits)
+ }
+ if h.index >= 1<<maxTrieIndexBits {
+ return 0, fmt.Errorf("size of contraction trie offset too large: %d >= %d", h.index, 1<<maxTrieIndexBits)
+ }
+ if offset >= 1<<maxContractOffsetBits {
+ return 0, fmt.Errorf("contraction offset out of bounds: %x >= %x", offset, 1<<maxContractOffsetBits)
+ }
+ ce := uint32(contractID)
+ ce += uint32(offset << (maxNBits + maxTrieIndexBits))
+ ce += uint32(h.index << maxNBits)
+ ce += uint32(h.n)
+ return ce, nil
+}
+
+// For expansions, collation elements are of the form
+// 11100000 00000000 bbbbbbbb bbbbbbbb,
+// where b* is the index into the expansion sequence table.
+const (
+ expandID = 0xE0000000
+ maxExpandIndexBits = 16
+)
+
+func makeExpandIndex(index int) (uint32, error) {
+ if index >= 1<<maxExpandIndexBits {
+ return 0, fmt.Errorf("expansion index out of bounds: %x >= %x", index, 1<<maxExpandIndexBits)
+ }
+ return expandID + uint32(index), nil
+}
+
+// Each list of collation elements corresponding to an expansion starts with
+// a header indicating the length of the sequence.
+func makeExpansionHeader(n int) (uint32, error) {
+ return uint32(n), nil
+}
+
+// Some runes can be expanded using NFKD decomposition. Instead of storing the full
+// sequence of collation elements, we decompose the rune and lookup the collation
+// elements for each rune in the decomposition and modify the tertiary weights.
+// The collation element, in this case, is of the form
+// 11110000 00000000 wwwwwwww vvvvvvvv, where
+// - v* is the replacement tertiary weight for the first rune,
+// - w* is the replacement tertiary weight for the second rune,
+// Tertiary weights of subsequent runes should be replaced with maxTertiary.
+// See http://www.unicode.org/reports/tr10/#Compatibility_Decompositions for more details.
+const (
+ decompID = 0xF0000000
+)
+
+func makeDecompose(t1, t2 int) (uint32, error) {
+ if t1 >= 256 || t1 < 0 {
+ return 0, fmt.Errorf("first tertiary weight out of bounds: %d >= 256", t1)
+ }
+ if t2 >= 256 || t2 < 0 {
+ return 0, fmt.Errorf("second tertiary weight out of bounds: %d >= 256", t2)
+ }
+ return uint32(t2<<8+t1) + decompID, nil
+}
+
+const (
+ // These constants were taken from http://www.unicode.org/versions/Unicode6.0.0/ch12.pdf.
+ minUnified rune = 0x4E00
+ maxUnified = 0x9FFF
+ minCompatibility = 0xF900
+ maxCompatibility = 0xFAFF
+ minRare = 0x3400
+ maxRare = 0x4DBF
+)
+const (
+ commonUnifiedOffset = 0x10000
+ rareUnifiedOffset = 0x20000 // largest rune in common is U+FAFF
+ otherOffset = 0x50000 // largest rune in rare is U+2FA1D
+ illegalOffset = otherOffset + int(unicode.MaxRune)
+ maxPrimary = illegalOffset + 1
+)
+
+// implicitPrimary returns the primary weight for the a rune
+// for which there is no entry for the rune in the collation table.
+// We take a different approach from the one specified in
+// http://unicode.org/reports/tr10/#Implicit_Weights,
+// but preserve the resulting relative ordering of the runes.
+func implicitPrimary(r rune) int {
+ if unicode.Is(unicode.Ideographic, r) {
+ if r >= minUnified && r <= maxUnified {
+ // The most common case for CJK.
+ return int(r) + commonUnifiedOffset
+ }
+ if r >= minCompatibility && r <= maxCompatibility {
+ // This will typically not hit. The DUCET explicitly specifies mappings
+ // for all characters that do not decompose.
+ return int(r) + commonUnifiedOffset
+ }
+ return int(r) + rareUnifiedOffset
+ }
+ return int(r) + otherOffset
+}
+
+// convertLargeWeights converts collation elements with large
+// primaries (either double primaries or for illegal runes)
+// to our own representation.
+// A CJK character C is represented in the DUCET as
+// [.FBxx.0020.0002.C][.BBBB.0000.0000.C]
+// We will rewrite these characters to a single CE.
+// We assume the CJK values start at 0x8000.
+// See http://unicode.org/reports/tr10/#Implicit_Weights
+func convertLargeWeights(elems []rawCE) (res []rawCE, err error) {
+ const (
+ cjkPrimaryStart = 0xFB40
+ rarePrimaryStart = 0xFB80
+ otherPrimaryStart = 0xFBC0
+ illegalPrimary = 0xFFFE
+ highBitsMask = 0x3F
+ lowBitsMask = 0x7FFF
+ lowBitsFlag = 0x8000
+ shiftBits = 15
+ )
+ for i := 0; i < len(elems); i++ {
+ ce := elems[i].w
+ p := ce[0]
+ if p < cjkPrimaryStart {
+ continue
+ }
+ if p > 0xFFFF {
+ return elems, fmt.Errorf("found primary weight %X; should be <= 0xFFFF", p)
+ }
+ if p >= illegalPrimary {
+ ce[0] = illegalOffset + p - illegalPrimary
+ } else {
+ if i+1 >= len(elems) {
+ return elems, fmt.Errorf("second part of double primary weight missing: %v", elems)
+ }
+ if elems[i+1].w[0]&lowBitsFlag == 0 {
+ return elems, fmt.Errorf("malformed second part of double primary weight: %v", elems)
+ }
+ np := ((p & highBitsMask) << shiftBits) + elems[i+1].w[0]&lowBitsMask
+ switch {
+ case p < rarePrimaryStart:
+ np += commonUnifiedOffset
+ case p < otherPrimaryStart:
+ np += rareUnifiedOffset
+ default:
+ p += otherOffset
+ }
+ ce[0] = np
+ for j := i + 1; j+1 < len(elems); j++ {
+ elems[j] = elems[j+1]
+ }
+ elems = elems[:len(elems)-1]
+ }
+ }
+ return elems, nil
+}
+
+// nextWeight computes the first possible collation weights following elems
+// for the given level.
+func nextWeight(level colltab.Level, elems []rawCE) []rawCE {
+ if level == colltab.Identity {
+ next := make([]rawCE, len(elems))
+ copy(next, elems)
+ return next
+ }
+ next := []rawCE{makeRawCE(elems[0].w, elems[0].ccc)}
+ next[0].w[level]++
+ if level < colltab.Secondary {
+ next[0].w[colltab.Secondary] = defaultSecondary
+ }
+ if level < colltab.Tertiary {
+ next[0].w[colltab.Tertiary] = defaultTertiary
+ }
+ // Filter entries that cannot influence ordering.
+ for _, ce := range elems[1:] {
+ skip := true
+ for i := colltab.Primary; i < level; i++ {
+ skip = skip && ce.w[i] == 0
+ }
+ if !skip {
+ next = append(next, ce)
+ }
+ }
+ return next
+}
+
+func nextVal(elems []rawCE, i int, level colltab.Level) (index, value int) {
+ for ; i < len(elems) && elems[i].w[level] == 0; i++ {
+ }
+ if i < len(elems) {
+ return i, elems[i].w[level]
+ }
+ return i, 0
+}
+
+// compareWeights returns -1 if a < b, 1 if a > b, or 0 otherwise.
+// It also returns the collation level at which the difference is found.
+func compareWeights(a, b []rawCE) (result int, level colltab.Level) {
+ for level := colltab.Primary; level < colltab.Identity; level++ {
+ var va, vb int
+ for ia, ib := 0, 0; ia < len(a) || ib < len(b); ia, ib = ia+1, ib+1 {
+ ia, va = nextVal(a, ia, level)
+ ib, vb = nextVal(b, ib, level)
+ if va != vb {
+ if va < vb {
+ return -1, level
+ } else {
+ return 1, level
+ }
+ }
+ }
+ }
+ return 0, colltab.Identity
+}
+
+func equalCE(a, b rawCE) bool {
+ for i := 0; i < 3; i++ {
+ if b.w[i] != a.w[i] {
+ return false
+ }
+ }
+ return true
+}
+
+func equalCEArrays(a, b []rawCE) bool {
+ if len(a) != len(b) {
+ return false
+ }
+ for i := range a {
+ if !equalCE(a[i], b[i]) {
+ return false
+ }
+ }
+ return true
+}
diff --git a/vendor/golang.org/x/text/collate/build/contract.go b/vendor/golang.org/x/text/collate/build/contract.go
new file mode 100644
index 0000000..a6a7e01
--- /dev/null
+++ b/vendor/golang.org/x/text/collate/build/contract.go
@@ -0,0 +1,309 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package build
+
+import (
+ "fmt"
+ "io"
+ "reflect"
+ "sort"
+ "strings"
+
+ "golang.org/x/text/internal/colltab"
+)
+
+// This file contains code for detecting contractions and generating
+// the necessary tables.
+// Any Unicode Collation Algorithm (UCA) table entry that has more than
+// one rune one the left-hand side is called a contraction.
+// See http://www.unicode.org/reports/tr10/#Contractions for more details.
+//
+// We define the following terms:
+// initial: a rune that appears as the first rune in a contraction.
+// suffix: a sequence of runes succeeding the initial rune
+// in a given contraction.
+// non-initial: a rune that appears in a suffix.
+//
+// A rune may be both an initial and a non-initial and may be so in
+// many contractions. An initial may typically also appear by itself.
+// In case of ambiguities, the UCA requires we match the longest
+// contraction.
+//
+// Many contraction rules share the same set of possible suffixes.
+// We store sets of suffixes in a trie that associates an index with
+// each suffix in the set. This index can be used to look up a
+// collation element associated with the (starter rune, suffix) pair.
+//
+// The trie is defined on a UTF-8 byte sequence.
+// The overall trie is represented as an array of ctEntries. Each node of the trie
+// is represented as a subsequence of ctEntries, where each entry corresponds to
+// a possible match of a next character in the search string. An entry
+// also includes the length and offset to the next sequence of entries
+// to check in case of a match.
+
+const (
+ final = 0
+ noIndex = 0xFF
+)
+
+// ctEntry associates to a matching byte an offset and/or next sequence of
+// bytes to check. A ctEntry c is called final if a match means that the
+// longest suffix has been found. An entry c is final if c.N == 0.
+// A single final entry can match a range of characters to an offset.
+// A non-final entry always matches a single byte. Note that a non-final
+// entry might still resemble a completed suffix.
+// Examples:
+// The suffix strings "ab" and "ac" can be represented as:
+// []ctEntry{
+// {'a', 1, 1, noIndex}, // 'a' by itself does not match, so i is 0xFF.
+// {'b', 'c', 0, 1}, // "ab" -> 1, "ac" -> 2
+// }
+//
+// The suffix strings "ab", "abc", "abd", and "abcd" can be represented as:
+// []ctEntry{
+// {'a', 1, 1, noIndex}, // 'a' must be followed by 'b'.
+// {'b', 1, 2, 1}, // "ab" -> 1, may be followed by 'c' or 'd'.
+// {'d', 'd', final, 3}, // "abd" -> 3
+// {'c', 4, 1, 2}, // "abc" -> 2, may be followed by 'd'.
+// {'d', 'd', final, 4}, // "abcd" -> 4
+// }
+// See genStateTests in contract_test.go for more examples.
+type ctEntry struct {
+ L uint8 // non-final: byte value to match; final: lowest match in range.
+ H uint8 // non-final: relative index to next block; final: highest match in range.
+ N uint8 // non-final: length of next block; final: final
+ I uint8 // result offset. Will be noIndex if more bytes are needed to complete.
+}
+
+// contractTrieSet holds a set of contraction tries. The tries are stored
+// consecutively in the entry field.
+type contractTrieSet []struct{ l, h, n, i uint8 }
+
+// ctHandle is used to identify a trie in the trie set, consisting in an offset
+// in the array and the size of the first node.
+type ctHandle struct {
+ index, n int
+}
+
+// appendTrie adds a new trie for the given suffixes to the trie set and returns
+// a handle to it. The handle will be invalid on error.
+func appendTrie(ct *colltab.ContractTrieSet, suffixes []string) (ctHandle, error) {
+ es := make([]stridx, len(suffixes))
+ for i, s := range suffixes {
+ es[i].str = s
+ }
+ sort.Sort(offsetSort(es))
+ for i := range es {
+ es[i].index = i + 1
+ }
+ sort.Sort(genidxSort(es))
+ i := len(*ct)
+ n, err := genStates(ct, es)
+ if err != nil {
+ *ct = (*ct)[:i]
+ return ctHandle{}, err
+ }
+ return ctHandle{i, n}, nil
+}
+
+// genStates generates ctEntries for a given suffix set and returns
+// the number of entries for the first node.
+func genStates(ct *colltab.ContractTrieSet, sis []stridx) (int, error) {
+ if len(sis) == 0 {
+ return 0, fmt.Errorf("genStates: list of suffices must be non-empty")
+ }
+ start := len(*ct)
+ // create entries for differing first bytes.
+ for _, si := range sis {
+ s := si.str
+ if len(s) == 0 {
+ continue
+ }
+ added := false
+ c := s[0]
+ if len(s) > 1 {
+ for j := len(*ct) - 1; j >= start; j-- {
+ if (*ct)[j].L == c {
+ added = true
+ break
+ }
+ }
+ if !added {
+ *ct = append(*ct, ctEntry{L: c, I: noIndex})
+ }
+ } else {
+ for j := len(*ct) - 1; j >= start; j-- {
+ // Update the offset for longer suffixes with the same byte.
+ if (*ct)[j].L == c {
+ (*ct)[j].I = uint8(si.index)
+ added = true
+ }
+ // Extend range of final ctEntry, if possible.
+ if (*ct)[j].H+1 == c {
+ (*ct)[j].H = c
+ added = true
+ }
+ }
+ if !added {
+ *ct = append(*ct, ctEntry{L: c, H: c, N: final, I: uint8(si.index)})
+ }
+ }
+ }
+ n := len(*ct) - start
+ // Append nodes for the remainder of the suffixes for each ctEntry.
+ sp := 0
+ for i, end := start, len(*ct); i < end; i++ {
+ fe := (*ct)[i]
+ if fe.H == 0 { // uninitialized non-final
+ ln := len(*ct) - start - n
+ if ln > 0xFF {
+ return 0, fmt.Errorf("genStates: relative block offset too large: %d > 255", ln)
+ }
+ fe.H = uint8(ln)
+ // Find first non-final strings with same byte as current entry.
+ for ; sis[sp].str[0] != fe.L; sp++ {
+ }
+ se := sp + 1
+ for ; se < len(sis) && len(sis[se].str) > 1 && sis[se].str[0] == fe.L; se++ {
+ }
+ sl := sis[sp:se]
+ sp = se
+ for i, si := range sl {
+ sl[i].str = si.str[1:]
+ }
+ nn, err := genStates(ct, sl)
+ if err != nil {
+ return 0, err
+ }
+ fe.N = uint8(nn)
+ (*ct)[i] = fe
+ }
+ }
+ sort.Sort(entrySort((*ct)[start : start+n]))
+ return n, nil
+}
+
+// There may be both a final and non-final entry for a byte if the byte
+// is implied in a range of matches in the final entry.
+// We need to ensure that the non-final entry comes first in that case.
+type entrySort colltab.ContractTrieSet
+
+func (fe entrySort) Len() int { return len(fe) }
+func (fe entrySort) Swap(i, j int) { fe[i], fe[j] = fe[j], fe[i] }
+func (fe entrySort) Less(i, j int) bool {
+ return fe[i].L > fe[j].L
+}
+
+// stridx is used for sorting suffixes and their associated offsets.
+type stridx struct {
+ str string
+ index int
+}
+
+// For computing the offsets, we first sort by size, and then by string.
+// This ensures that strings that only differ in the last byte by 1
+// are sorted consecutively in increasing order such that they can
+// be packed as a range in a final ctEntry.
+type offsetSort []stridx
+
+func (si offsetSort) Len() int { return len(si) }
+func (si offsetSort) Swap(i, j int) { si[i], si[j] = si[j], si[i] }
+func (si offsetSort) Less(i, j int) bool {
+ if len(si[i].str) != len(si[j].str) {
+ return len(si[i].str) > len(si[j].str)
+ }
+ return si[i].str < si[j].str
+}
+
+// For indexing, we want to ensure that strings are sorted in string order, where
+// for strings with the same prefix, we put longer strings before shorter ones.
+type genidxSort []stridx
+
+func (si genidxSort) Len() int { return len(si) }
+func (si genidxSort) Swap(i, j int) { si[i], si[j] = si[j], si[i] }
+func (si genidxSort) Less(i, j int) bool {
+ if strings.HasPrefix(si[j].str, si[i].str) {
+ return false
+ }
+ if strings.HasPrefix(si[i].str, si[j].str) {
+ return true
+ }
+ return si[i].str < si[j].str
+}
+
+// lookup matches the longest suffix in str and returns the associated offset
+// and the number of bytes consumed.
+func lookup(ct *colltab.ContractTrieSet, h ctHandle, str []byte) (index, ns int) {
+ states := (*ct)[h.index:]
+ p := 0
+ n := h.n
+ for i := 0; i < n && p < len(str); {
+ e := states[i]
+ c := str[p]
+ if c >= e.L {
+ if e.L == c {
+ p++
+ if e.I != noIndex {
+ index, ns = int(e.I), p
+ }
+ if e.N != final {
+ // set to new state
+ i, states, n = 0, states[int(e.H)+n:], int(e.N)
+ } else {
+ return
+ }
+ continue
+ } else if e.N == final && c <= e.H {
+ p++
+ return int(c-e.L) + int(e.I), p
+ }
+ }
+ i++
+ }
+ return
+}
+
+// print writes the contractTrieSet t as compilable Go code to w. It returns
+// the total number of bytes written and the size of the resulting data structure in bytes.
+func print(t *colltab.ContractTrieSet, w io.Writer, name string) (n, size int, err error) {
+ update3 := func(nn, sz int, e error) {
+ n += nn
+ if err == nil {
+ err = e
+ }
+ size += sz
+ }
+ update2 := func(nn int, e error) { update3(nn, 0, e) }
+
+ update3(printArray(*t, w, name))
+ update2(fmt.Fprintf(w, "var %sContractTrieSet = ", name))
+ update3(printStruct(*t, w, name))
+ update2(fmt.Fprintln(w))
+ return
+}
+
+func printArray(ct colltab.ContractTrieSet, w io.Writer, name string) (n, size int, err error) {
+ p := func(f string, a ...interface{}) {
+ nn, e := fmt.Fprintf(w, f, a...)
+ n += nn
+ if err == nil {
+ err = e
+ }
+ }
+ size = len(ct) * 4
+ p("// %sCTEntries: %d entries, %d bytes\n", name, len(ct), size)
+ p("var %sCTEntries = [%d]struct{L,H,N,I uint8}{\n", name, len(ct))
+ for _, fe := range ct {
+ p("\t{0x%X, 0x%X, %d, %d},\n", fe.L, fe.H, fe.N, fe.I)
+ }
+ p("}\n")
+ return
+}
+
+func printStruct(ct colltab.ContractTrieSet, w io.Writer, name string) (n, size int, err error) {
+ n, err = fmt.Fprintf(w, "colltab.ContractTrieSet( %sCTEntries[:] )", name)
+ size = int(reflect.TypeOf(ct).Size())
+ return
+}
diff --git a/vendor/golang.org/x/text/collate/build/order.go b/vendor/golang.org/x/text/collate/build/order.go
new file mode 100644
index 0000000..2c568db
--- /dev/null
+++ b/vendor/golang.org/x/text/collate/build/order.go
@@ -0,0 +1,393 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package build
+
+import (
+ "fmt"
+ "log"
+ "sort"
+ "strings"
+ "unicode"
+
+ "golang.org/x/text/internal/colltab"
+ "golang.org/x/text/unicode/norm"
+)
+
+type logicalAnchor int
+
+const (
+ firstAnchor logicalAnchor = -1
+ noAnchor = 0
+ lastAnchor = 1
+)
+
+// entry is used to keep track of a single entry in the collation element table
+// during building. Examples of entries can be found in the Default Unicode
+// Collation Element Table.
+// See http://www.unicode.org/Public/UCA/6.0.0/allkeys.txt.
+type entry struct {
+ str string // same as string(runes)
+ runes []rune
+ elems []rawCE // the collation elements
+ extend string // weights of extend to be appended to elems
+ before bool // weights relative to next instead of previous.
+ lock bool // entry is used in extension and can no longer be moved.
+
+ // prev, next, and level are used to keep track of tailorings.
+ prev, next *entry
+ level colltab.Level // next differs at this level
+ skipRemove bool // do not unlink when removed
+
+ decompose bool // can use NFKD decomposition to generate elems
+ exclude bool // do not include in table
+ implicit bool // derived, is not included in the list
+ modified bool // entry was modified in tailoring
+ logical logicalAnchor
+
+ expansionIndex int // used to store index into expansion table
+ contractionHandle ctHandle
+ contractionIndex int // index into contraction elements
+}
+
+func (e *entry) String() string {
+ return fmt.Sprintf("%X (%q) -> %X (ch:%x; ci:%d, ei:%d)",
+ e.runes, e.str, e.elems, e.contractionHandle, e.contractionIndex, e.expansionIndex)
+}
+
+func (e *entry) skip() bool {
+ return e.contraction()
+}
+
+func (e *entry) expansion() bool {
+ return !e.decompose && len(e.elems) > 1
+}
+
+func (e *entry) contraction() bool {
+ return len(e.runes) > 1
+}
+
+func (e *entry) contractionStarter() bool {
+ return e.contractionHandle.n != 0
+}
+
+// nextIndexed gets the next entry that needs to be stored in the table.
+// It returns the entry and the collation level at which the next entry differs
+// from the current entry.
+// Entries that can be explicitly derived and logical reset positions are
+// examples of entries that will not be indexed.
+func (e *entry) nextIndexed() (*entry, colltab.Level) {
+ level := e.level
+ for e = e.next; e != nil && (e.exclude || len(e.elems) == 0); e = e.next {
+ if e.level < level {
+ level = e.level
+ }
+ }
+ return e, level
+}
+
+// remove unlinks entry e from the sorted chain and clears the collation
+// elements. e may not be at the front or end of the list. This should always
+// be the case, as the front and end of the list are always logical anchors,
+// which may not be removed.
+func (e *entry) remove() {
+ if e.logical != noAnchor {
+ log.Fatalf("may not remove anchor %q", e.str)
+ }
+ // TODO: need to set e.prev.level to e.level if e.level is smaller?
+ e.elems = nil
+ if !e.skipRemove {
+ if e.prev != nil {
+ e.prev.next = e.next
+ }
+ if e.next != nil {
+ e.next.prev = e.prev
+ }
+ }
+ e.skipRemove = false
+}
+
+// insertAfter inserts n after e.
+func (e *entry) insertAfter(n *entry) {
+ if e == n {
+ panic("e == anchor")
+ }
+ if e == nil {
+ panic("unexpected nil anchor")
+ }
+ n.remove()
+ n.decompose = false // redo decomposition test
+
+ n.next = e.next
+ n.prev = e
+ if e.next != nil {
+ e.next.prev = n
+ }
+ e.next = n
+}
+
+// insertBefore inserts n before e.
+func (e *entry) insertBefore(n *entry) {
+ if e == n {
+ panic("e == anchor")
+ }
+ if e == nil {
+ panic("unexpected nil anchor")
+ }
+ n.remove()
+ n.decompose = false // redo decomposition test
+
+ n.prev = e.prev
+ n.next = e
+ if e.prev != nil {
+ e.prev.next = n
+ }
+ e.prev = n
+}
+
+func (e *entry) encodeBase() (ce uint32, err error) {
+ switch {
+ case e.expansion():
+ ce, err = makeExpandIndex(e.expansionIndex)
+ default:
+ if e.decompose {
+ log.Fatal("decompose should be handled elsewhere")
+ }
+ ce, err = makeCE(e.elems[0])
+ }
+ return
+}
+
+func (e *entry) encode() (ce uint32, err error) {
+ if e.skip() {
+ log.Fatal("cannot build colElem for entry that should be skipped")
+ }
+ switch {
+ case e.decompose:
+ t1 := e.elems[0].w[2]
+ t2 := 0
+ if len(e.elems) > 1 {
+ t2 = e.elems[1].w[2]
+ }
+ ce, err = makeDecompose(t1, t2)
+ case e.contractionStarter():
+ ce, err = makeContractIndex(e.contractionHandle, e.contractionIndex)
+ default:
+ if len(e.runes) > 1 {
+ log.Fatal("colElem: contractions are handled in contraction trie")
+ }
+ ce, err = e.encodeBase()
+ }
+ return
+}
+
+// entryLess returns true if a sorts before b and false otherwise.
+func entryLess(a, b *entry) bool {
+ if res, _ := compareWeights(a.elems, b.elems); res != 0 {
+ return res == -1
+ }
+ if a.logical != noAnchor {
+ return a.logical == firstAnchor
+ }
+ if b.logical != noAnchor {
+ return b.logical == lastAnchor
+ }
+ return a.str < b.str
+}
+
+type sortedEntries []*entry
+
+func (s sortedEntries) Len() int {
+ return len(s)
+}
+
+func (s sortedEntries) Swap(i, j int) {
+ s[i], s[j] = s[j], s[i]
+}
+
+func (s sortedEntries) Less(i, j int) bool {
+ return entryLess(s[i], s[j])
+}
+
+type ordering struct {
+ id string
+ entryMap map[string]*entry
+ ordered []*entry
+ handle *trieHandle
+}
+
+// insert inserts e into both entryMap and ordered.
+// Note that insert simply appends e to ordered. To reattain a sorted
+// order, o.sort() should be called.
+func (o *ordering) insert(e *entry) {
+ if e.logical == noAnchor {
+ o.entryMap[e.str] = e
+ } else {
+ // Use key format as used in UCA rules.
+ o.entryMap[fmt.Sprintf("[%s]", e.str)] = e
+ // Also add index entry for XML format.
+ o.entryMap[fmt.Sprintf("<%s/>", strings.Replace(e.str, " ", "_", -1))] = e
+ }
+ o.ordered = append(o.ordered, e)
+}
+
+// newEntry creates a new entry for the given info and inserts it into
+// the index.
+func (o *ordering) newEntry(s string, ces []rawCE) *entry {
+ e := &entry{
+ runes: []rune(s),
+ elems: ces,
+ str: s,
+ }
+ o.insert(e)
+ return e
+}
+
+// find looks up and returns the entry for the given string.
+// It returns nil if str is not in the index and if an implicit value
+// cannot be derived, that is, if str represents more than one rune.
+func (o *ordering) find(str string) *entry {
+ e := o.entryMap[str]
+ if e == nil {
+ r := []rune(str)
+ if len(r) == 1 {
+ const (
+ firstHangul = 0xAC00
+ lastHangul = 0xD7A3
+ )
+ if r[0] >= firstHangul && r[0] <= lastHangul {
+ ce := []rawCE{}
+ nfd := norm.NFD.String(str)
+ for _, r := range nfd {
+ ce = append(ce, o.find(string(r)).elems...)
+ }
+ e = o.newEntry(nfd, ce)
+ } else {
+ e = o.newEntry(string(r[0]), []rawCE{
+ {w: []int{
+ implicitPrimary(r[0]),
+ defaultSecondary,
+ defaultTertiary,
+ int(r[0]),
+ },
+ },
+ })
+ e.modified = true
+ }
+ e.exclude = true // do not index implicits
+ }
+ }
+ return e
+}
+
+// makeRootOrdering returns a newly initialized ordering value and populates
+// it with a set of logical reset points that can be used as anchors.
+// The anchors first_tertiary_ignorable and __END__ will always sort at
+// the beginning and end, respectively. This means that prev and next are non-nil
+// for any indexed entry.
+func makeRootOrdering() ordering {
+ const max = unicode.MaxRune
+ o := ordering{
+ entryMap: make(map[string]*entry),
+ }
+ insert := func(typ logicalAnchor, s string, ce []int) {
+ e := &entry{
+ elems: []rawCE{{w: ce}},
+ str: s,
+ exclude: true,
+ logical: typ,
+ }
+ o.insert(e)
+ }
+ insert(firstAnchor, "first tertiary ignorable", []int{0, 0, 0, 0})
+ insert(lastAnchor, "last tertiary ignorable", []int{0, 0, 0, max})
+ insert(lastAnchor, "last primary ignorable", []int{0, defaultSecondary, defaultTertiary, max})
+ insert(lastAnchor, "last non ignorable", []int{maxPrimary, defaultSecondary, defaultTertiary, max})
+ insert(lastAnchor, "__END__", []int{1 << maxPrimaryBits, defaultSecondary, defaultTertiary, max})
+ return o
+}
+
+// patchForInsert eleminates entries from the list with more than one collation element.
+// The next and prev fields of the eliminated entries still point to appropriate
+// values in the newly created list.
+// It requires that sort has been called.
+func (o *ordering) patchForInsert() {
+ for i := 0; i < len(o.ordered)-1; {
+ e := o.ordered[i]
+ lev := e.level
+ n := e.next
+ for ; n != nil && len(n.elems) > 1; n = n.next {
+ if n.level < lev {
+ lev = n.level
+ }
+ n.skipRemove = true
+ }
+ for ; o.ordered[i] != n; i++ {
+ o.ordered[i].level = lev
+ o.ordered[i].next = n
+ o.ordered[i+1].prev = e
+ }
+ }
+}
+
+// clone copies all ordering of es into a new ordering value.
+func (o *ordering) clone() *ordering {
+ o.sort()
+ oo := ordering{
+ entryMap: make(map[string]*entry),
+ }
+ for _, e := range o.ordered {
+ ne := &entry{
+ runes: e.runes,
+ elems: e.elems,
+ str: e.str,
+ decompose: e.decompose,
+ exclude: e.exclude,
+ logical: e.logical,
+ }
+ oo.insert(ne)
+ }
+ oo.sort() // link all ordering.
+ oo.patchForInsert()
+ return &oo
+}
+
+// front returns the first entry to be indexed.
+// It assumes that sort() has been called.
+func (o *ordering) front() *entry {
+ e := o.ordered[0]
+ if e.prev != nil {
+ log.Panicf("unexpected first entry: %v", e)
+ }
+ // The first entry is always a logical position, which should not be indexed.
+ e, _ = e.nextIndexed()
+ return e
+}
+
+// sort sorts all ordering based on their collation elements and initializes
+// the prev, next, and level fields accordingly.
+func (o *ordering) sort() {
+ sort.Sort(sortedEntries(o.ordered))
+ l := o.ordered
+ for i := 1; i < len(l); i++ {
+ k := i - 1
+ l[k].next = l[i]
+ _, l[k].level = compareWeights(l[k].elems, l[i].elems)
+ l[i].prev = l[k]
+ }
+}
+
+// genColElems generates a collation element array from the runes in str. This
+// assumes that all collation elements have already been added to the Builder.
+func (o *ordering) genColElems(str string) []rawCE {
+ elems := []rawCE{}
+ for _, r := range []rune(str) {
+ for _, ce := range o.find(string(r)).elems {
+ if ce.w[0] != 0 || ce.w[1] != 0 || ce.w[2] != 0 {
+ elems = append(elems, ce)
+ }
+ }
+ }
+ return elems
+}
diff --git a/vendor/golang.org/x/text/collate/build/table.go b/vendor/golang.org/x/text/collate/build/table.go
new file mode 100644
index 0000000..7eea7a6
--- /dev/null
+++ b/vendor/golang.org/x/text/collate/build/table.go
@@ -0,0 +1,81 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package build
+
+import (
+ "fmt"
+ "io"
+ "reflect"
+
+ "golang.org/x/text/internal/colltab"
+)
+
+// table is an intermediate structure that roughly resembles the table in collate.
+type table struct {
+ colltab.Table
+ trie trie
+ root *trieHandle
+}
+
+// print writes the table as Go compilable code to w. It prefixes the
+// variable names with name. It returns the number of bytes written
+// and the size of the resulting table.
+func (t *table) fprint(w io.Writer, name string) (n, size int, err error) {
+ update := func(nn, sz int, e error) {
+ n += nn
+ if err == nil {
+ err = e
+ }
+ size += sz
+ }
+ // Write arrays needed for the structure.
+ update(printColElems(w, t.ExpandElem, name+"ExpandElem"))
+ update(printColElems(w, t.ContractElem, name+"ContractElem"))
+ update(t.trie.printArrays(w, name))
+ update(printArray(t.ContractTries, w, name))
+
+ nn, e := fmt.Fprintf(w, "// Total size of %sTable is %d bytes\n", name, size)
+ update(nn, 0, e)
+ return
+}
+
+func (t *table) fprintIndex(w io.Writer, h *trieHandle, id string) (n int, err error) {
+ p := func(f string, a ...interface{}) {
+ nn, e := fmt.Fprintf(w, f, a...)
+ n += nn
+ if err == nil {
+ err = e
+ }
+ }
+ p("\t{ // %s\n", id)
+ p("\t\tlookupOffset: 0x%x,\n", h.lookupStart)
+ p("\t\tvaluesOffset: 0x%x,\n", h.valueStart)
+ p("\t},\n")
+ return
+}
+
+func printColElems(w io.Writer, a []uint32, name string) (n, sz int, err error) {
+ p := func(f string, a ...interface{}) {
+ nn, e := fmt.Fprintf(w, f, a...)
+ n += nn
+ if err == nil {
+ err = e
+ }
+ }
+ sz = len(a) * int(reflect.TypeOf(uint32(0)).Size())
+ p("// %s: %d entries, %d bytes\n", name, len(a), sz)
+ p("var %s = [%d]uint32 {", name, len(a))
+ for i, c := range a {
+ switch {
+ case i%64 == 0:
+ p("\n\t// Block %d, offset 0x%x\n", i/64, i)
+ case (i%64)%6 == 0:
+ p("\n\t")
+ }
+ p("0x%.8X, ", c)
+ }
+ p("\n}\n\n")
+ return
+}
diff --git a/vendor/golang.org/x/text/collate/build/trie.go b/vendor/golang.org/x/text/collate/build/trie.go
new file mode 100644
index 0000000..9404a34
--- /dev/null
+++ b/vendor/golang.org/x/text/collate/build/trie.go
@@ -0,0 +1,290 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The trie in this file is used to associate the first full character
+// in a UTF-8 string to a collation element.
+// All but the last byte in a UTF-8 byte sequence are
+// used to look up offsets in the index table to be used for the next byte.
+// The last byte is used to index into a table of collation elements.
+// This file contains the code for the generation of the trie.
+
+package build
+
+import (
+ "fmt"
+ "hash/fnv"
+ "io"
+ "reflect"
+)
+
+const (
+ blockSize = 64
+ blockOffset = 2 // Subtract 2 blocks to compensate for the 0x80 added to continuation bytes.
+)
+
+type trieHandle struct {
+ lookupStart uint16 // offset in table for first byte
+ valueStart uint16 // offset in table for first byte
+}
+
+type trie struct {
+ index []uint16
+ values []uint32
+}
+
+// trieNode is the intermediate trie structure used for generating a trie.
+type trieNode struct {
+ index []*trieNode
+ value []uint32
+ b byte
+ refValue uint16
+ refIndex uint16
+}
+
+func newNode() *trieNode {
+ return &trieNode{
+ index: make([]*trieNode, 64),
+ value: make([]uint32, 128), // root node size is 128 instead of 64
+ }
+}
+
+func (n *trieNode) isInternal() bool {
+ return n.value != nil
+}
+
+func (n *trieNode) insert(r rune, value uint32) {
+ const maskx = 0x3F // mask out two most-significant bits
+ str := string(r)
+ if len(str) == 1 {
+ n.value[str[0]] = value
+ return
+ }
+ for i := 0; i < len(str)-1; i++ {
+ b := str[i] & maskx
+ if n.index == nil {
+ n.index = make([]*trieNode, blockSize)
+ }
+ nn := n.index[b]
+ if nn == nil {
+ nn = &trieNode{}
+ nn.b = b
+ n.index[b] = nn
+ }
+ n = nn
+ }
+ if n.value == nil {
+ n.value = make([]uint32, blockSize)
+ }
+ b := str[len(str)-1] & maskx
+ n.value[b] = value
+}
+
+type trieBuilder struct {
+ t *trie
+
+ roots []*trieHandle
+
+ lookupBlocks []*trieNode
+ valueBlocks []*trieNode
+
+ lookupBlockIdx map[uint32]*trieNode
+ valueBlockIdx map[uint32]*trieNode
+}
+
+func newTrieBuilder() *trieBuilder {
+ index := &trieBuilder{}
+ index.lookupBlocks = make([]*trieNode, 0)
+ index.valueBlocks = make([]*trieNode, 0)
+ index.lookupBlockIdx = make(map[uint32]*trieNode)
+ index.valueBlockIdx = make(map[uint32]*trieNode)
+ // The third nil is the default null block. The other two blocks
+ // are used to guarantee an offset of at least 3 for each block.
+ index.lookupBlocks = append(index.lookupBlocks, nil, nil, nil)
+ index.t = &trie{}
+ return index
+}
+
+func (b *trieBuilder) computeOffsets(n *trieNode) *trieNode {
+ hasher := fnv.New32()
+ if n.index != nil {
+ for i, nn := range n.index {
+ var vi, vv uint16
+ if nn != nil {
+ nn = b.computeOffsets(nn)
+ n.index[i] = nn
+ vi = nn.refIndex
+ vv = nn.refValue
+ }
+ hasher.Write([]byte{byte(vi >> 8), byte(vi)})
+ hasher.Write([]byte{byte(vv >> 8), byte(vv)})
+ }
+ h := hasher.Sum32()
+ nn, ok := b.lookupBlockIdx[h]
+ if !ok {
+ n.refIndex = uint16(len(b.lookupBlocks)) - blockOffset
+ b.lookupBlocks = append(b.lookupBlocks, n)
+ b.lookupBlockIdx[h] = n
+ } else {
+ n = nn
+ }
+ } else {
+ for _, v := range n.value {
+ hasher.Write([]byte{byte(v >> 24), byte(v >> 16), byte(v >> 8), byte(v)})
+ }
+ h := hasher.Sum32()
+ nn, ok := b.valueBlockIdx[h]
+ if !ok {
+ n.refValue = uint16(len(b.valueBlocks)) - blockOffset
+ n.refIndex = n.refValue
+ b.valueBlocks = append(b.valueBlocks, n)
+ b.valueBlockIdx[h] = n
+ } else {
+ n = nn
+ }
+ }
+ return n
+}
+
+func (b *trieBuilder) addStartValueBlock(n *trieNode) uint16 {
+ hasher := fnv.New32()
+ for _, v := range n.value[:2*blockSize] {
+ hasher.Write([]byte{byte(v >> 24), byte(v >> 16), byte(v >> 8), byte(v)})
+ }
+ h := hasher.Sum32()
+ nn, ok := b.valueBlockIdx[h]
+ if !ok {
+ n.refValue = uint16(len(b.valueBlocks))
+ n.refIndex = n.refValue
+ b.valueBlocks = append(b.valueBlocks, n)
+ // Add a dummy block to accommodate the double block size.
+ b.valueBlocks = append(b.valueBlocks, nil)
+ b.valueBlockIdx[h] = n
+ } else {
+ n = nn
+ }
+ return n.refValue
+}
+
+func genValueBlock(t *trie, n *trieNode) {
+ if n != nil {
+ for _, v := range n.value {
+ t.values = append(t.values, v)
+ }
+ }
+}
+
+func genLookupBlock(t *trie, n *trieNode) {
+ for _, nn := range n.index {
+ v := uint16(0)
+ if nn != nil {
+ if n.index != nil {
+ v = nn.refIndex
+ } else {
+ v = nn.refValue
+ }
+ }
+ t.index = append(t.index, v)
+ }
+}
+
+func (b *trieBuilder) addTrie(n *trieNode) *trieHandle {
+ h := &trieHandle{}
+ b.roots = append(b.roots, h)
+ h.valueStart = b.addStartValueBlock(n)
+ if len(b.roots) == 1 {
+ // We insert a null block after the first start value block.
+ // This ensures that continuation bytes UTF-8 sequences of length
+ // greater than 2 will automatically hit a null block if there
+ // was an undefined entry.
+ b.valueBlocks = append(b.valueBlocks, nil)
+ }
+ n = b.computeOffsets(n)
+ // Offset by one extra block as the first byte starts at 0xC0 instead of 0x80.
+ h.lookupStart = n.refIndex - 1
+ return h
+}
+
+// generate generates and returns the trie for n.
+func (b *trieBuilder) generate() (t *trie, err error) {
+ t = b.t
+ if len(b.valueBlocks) >= 1<<16 {
+ return nil, fmt.Errorf("maximum number of value blocks exceeded (%d > %d)", len(b.valueBlocks), 1<<16)
+ }
+ if len(b.lookupBlocks) >= 1<<16 {
+ return nil, fmt.Errorf("maximum number of lookup blocks exceeded (%d > %d)", len(b.lookupBlocks), 1<<16)
+ }
+ genValueBlock(t, b.valueBlocks[0])
+ genValueBlock(t, &trieNode{value: make([]uint32, 64)})
+ for i := 2; i < len(b.valueBlocks); i++ {
+ genValueBlock(t, b.valueBlocks[i])
+ }
+ n := &trieNode{index: make([]*trieNode, 64)}
+ genLookupBlock(t, n)
+ genLookupBlock(t, n)
+ genLookupBlock(t, n)
+ for i := 3; i < len(b.lookupBlocks); i++ {
+ genLookupBlock(t, b.lookupBlocks[i])
+ }
+ return b.t, nil
+}
+
+func (t *trie) printArrays(w io.Writer, name string) (n, size int, err error) {
+ p := func(f string, a ...interface{}) {
+ nn, e := fmt.Fprintf(w, f, a...)
+ n += nn
+ if err == nil {
+ err = e
+ }
+ }
+ nv := len(t.values)
+ p("// %sValues: %d entries, %d bytes\n", name, nv, nv*4)
+ p("// Block 2 is the null block.\n")
+ p("var %sValues = [%d]uint32 {", name, nv)
+ var printnewline bool
+ for i, v := range t.values {
+ if i%blockSize == 0 {
+ p("\n\t// Block %#x, offset %#x", i/blockSize, i)
+ }
+ if i%4 == 0 {
+ printnewline = true
+ }
+ if v != 0 {
+ if printnewline {
+ p("\n\t")
+ printnewline = false
+ }
+ p("%#04x:%#08x, ", i, v)
+ }
+ }
+ p("\n}\n\n")
+ ni := len(t.index)
+ p("// %sLookup: %d entries, %d bytes\n", name, ni, ni*2)
+ p("// Block 0 is the null block.\n")
+ p("var %sLookup = [%d]uint16 {", name, ni)
+ printnewline = false
+ for i, v := range t.index {
+ if i%blockSize == 0 {
+ p("\n\t// Block %#x, offset %#x", i/blockSize, i)
+ }
+ if i%8 == 0 {
+ printnewline = true
+ }
+ if v != 0 {
+ if printnewline {
+ p("\n\t")
+ printnewline = false
+ }
+ p("%#03x:%#02x, ", i, v)
+ }
+ }
+ p("\n}\n\n")
+ return n, nv*4 + ni*2, err
+}
+
+func (t *trie) printStruct(w io.Writer, handle *trieHandle, name string) (n, sz int, err error) {
+ const msg = "trie{ %sLookup[%d:], %sValues[%d:], %sLookup[:], %sValues[:]}"
+ n, err = fmt.Fprintf(w, msg, name, handle.lookupStart*blockSize, name, handle.valueStart*blockSize, name, name)
+ sz += int(reflect.TypeOf(trie{}).Size())
+ return
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-15 21:50:18 +0000