aboutsummaryrefslogtreecommitdiff
path: root/vendor/golang.org/x/text/unicode/norm/maketables.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/golang.org/x/text/unicode/norm/maketables.go')
-rw-r--r--vendor/golang.org/x/text/unicode/norm/maketables.go978
1 files changed, 978 insertions, 0 deletions
diff --git a/vendor/golang.org/x/text/unicode/norm/maketables.go b/vendor/golang.org/x/text/unicode/norm/maketables.go
new file mode 100644
index 0000000..07bdff6
--- /dev/null
+++ b/vendor/golang.org/x/text/unicode/norm/maketables.go
@@ -0,0 +1,978 @@
+// Copyright 2011 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.
+
+// +build ignore
+
+// Normalization table generator.
+// Data read from the web.
+// See forminfo.go for a description of the trie values associated with each rune.
+
+package main
+
+import (
+ "bytes"
+ "flag"
+ "fmt"
+ "io"
+ "log"
+ "sort"
+ "strconv"
+ "strings"
+
+ "golang.org/x/text/internal/gen"
+ "golang.org/x/text/internal/triegen"
+ "golang.org/x/text/internal/ucd"
+)
+
+func main() {
+ gen.Init()
+ loadUnicodeData()
+ compactCCC()
+ loadCompositionExclusions()
+ completeCharFields(FCanonical)
+ completeCharFields(FCompatibility)
+ computeNonStarterCounts()
+ verifyComputed()
+ printChars()
+ if *test {
+ testDerived()
+ printTestdata()
+ } else {
+ makeTables()
+ }
+}
+
+var (
+ tablelist = flag.String("tables",
+ "all",
+ "comma-separated list of which tables to generate; "+
+ "can be 'decomp', 'recomp', 'info' and 'all'")
+ test = flag.Bool("test",
+ false,
+ "test existing tables against DerivedNormalizationProps and generate test data for regression testing")
+ verbose = flag.Bool("verbose",
+ false,
+ "write data to stdout as it is parsed")
+)
+
+const MaxChar = 0x10FFFF // anything above this shouldn't exist
+
+// Quick Check properties of runes allow us to quickly
+// determine whether a rune may occur in a normal form.
+// For a given normal form, a rune may be guaranteed to occur
+// verbatim (QC=Yes), may or may not combine with another
+// rune (QC=Maybe), or may not occur (QC=No).
+type QCResult int
+
+const (
+ QCUnknown QCResult = iota
+ QCYes
+ QCNo
+ QCMaybe
+)
+
+func (r QCResult) String() string {
+ switch r {
+ case QCYes:
+ return "Yes"
+ case QCNo:
+ return "No"
+ case QCMaybe:
+ return "Maybe"
+ }
+ return "***UNKNOWN***"
+}
+
+const (
+ FCanonical = iota // NFC or NFD
+ FCompatibility // NFKC or NFKD
+ FNumberOfFormTypes
+)
+
+const (
+ MComposed = iota // NFC or NFKC
+ MDecomposed // NFD or NFKD
+ MNumberOfModes
+)
+
+// This contains only the properties we're interested in.
+type Char struct {
+ name string
+ codePoint rune // if zero, this index is not a valid code point.
+ ccc uint8 // canonical combining class
+ origCCC uint8
+ excludeInComp bool // from CompositionExclusions.txt
+ compatDecomp bool // it has a compatibility expansion
+
+ nTrailingNonStarters uint8
+ nLeadingNonStarters uint8 // must be equal to trailing if non-zero
+
+ forms [FNumberOfFormTypes]FormInfo // For FCanonical and FCompatibility
+
+ state State
+}
+
+var chars = make([]Char, MaxChar+1)
+var cccMap = make(map[uint8]uint8)
+
+func (c Char) String() string {
+ buf := new(bytes.Buffer)
+
+ fmt.Fprintf(buf, "%U [%s]:\n", c.codePoint, c.name)
+ fmt.Fprintf(buf, " ccc: %v\n", c.ccc)
+ fmt.Fprintf(buf, " excludeInComp: %v\n", c.excludeInComp)
+ fmt.Fprintf(buf, " compatDecomp: %v\n", c.compatDecomp)
+ fmt.Fprintf(buf, " state: %v\n", c.state)
+ fmt.Fprintf(buf, " NFC:\n")
+ fmt.Fprint(buf, c.forms[FCanonical])
+ fmt.Fprintf(buf, " NFKC:\n")
+ fmt.Fprint(buf, c.forms[FCompatibility])
+
+ return buf.String()
+}
+
+// In UnicodeData.txt, some ranges are marked like this:
+// 3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;;
+// 4DB5;<CJK Ideograph Extension A, Last>;Lo;0;L;;;;;N;;;;;
+// parseCharacter keeps a state variable indicating the weirdness.
+type State int
+
+const (
+ SNormal State = iota // known to be zero for the type
+ SFirst
+ SLast
+ SMissing
+)
+
+var lastChar = rune('\u0000')
+
+func (c Char) isValid() bool {
+ return c.codePoint != 0 && c.state != SMissing
+}
+
+type FormInfo struct {
+ quickCheck [MNumberOfModes]QCResult // index: MComposed or MDecomposed
+ verified [MNumberOfModes]bool // index: MComposed or MDecomposed
+
+ combinesForward bool // May combine with rune on the right
+ combinesBackward bool // May combine with rune on the left
+ isOneWay bool // Never appears in result
+ inDecomp bool // Some decompositions result in this char.
+ decomp Decomposition
+ expandedDecomp Decomposition
+}
+
+func (f FormInfo) String() string {
+ buf := bytes.NewBuffer(make([]byte, 0))
+
+ fmt.Fprintf(buf, " quickCheck[C]: %v\n", f.quickCheck[MComposed])
+ fmt.Fprintf(buf, " quickCheck[D]: %v\n", f.quickCheck[MDecomposed])
+ fmt.Fprintf(buf, " cmbForward: %v\n", f.combinesForward)
+ fmt.Fprintf(buf, " cmbBackward: %v\n", f.combinesBackward)
+ fmt.Fprintf(buf, " isOneWay: %v\n", f.isOneWay)
+ fmt.Fprintf(buf, " inDecomp: %v\n", f.inDecomp)
+ fmt.Fprintf(buf, " decomposition: %X\n", f.decomp)
+ fmt.Fprintf(buf, " expandedDecomp: %X\n", f.expandedDecomp)
+
+ return buf.String()
+}
+
+type Decomposition []rune
+
+func parseDecomposition(s string, skipfirst bool) (a []rune, err error) {
+ decomp := strings.Split(s, " ")
+ if len(decomp) > 0 && skipfirst {
+ decomp = decomp[1:]
+ }
+ for _, d := range decomp {
+ point, err := strconv.ParseUint(d, 16, 64)
+ if err != nil {
+ return a, err
+ }
+ a = append(a, rune(point))
+ }
+ return a, nil
+}
+
+func loadUnicodeData() {
+ f := gen.OpenUCDFile("UnicodeData.txt")
+ defer f.Close()
+ p := ucd.New(f)
+ for p.Next() {
+ r := p.Rune(ucd.CodePoint)
+ char := &chars[r]
+
+ char.ccc = uint8(p.Uint(ucd.CanonicalCombiningClass))
+ decmap := p.String(ucd.DecompMapping)
+
+ exp, err := parseDecomposition(decmap, false)
+ isCompat := false
+ if err != nil {
+ if len(decmap) > 0 {
+ exp, err = parseDecomposition(decmap, true)
+ if err != nil {
+ log.Fatalf(`%U: bad decomp |%v|: "%s"`, r, decmap, err)
+ }
+ isCompat = true
+ }
+ }
+
+ char.name = p.String(ucd.Name)
+ char.codePoint = r
+ char.forms[FCompatibility].decomp = exp
+ if !isCompat {
+ char.forms[FCanonical].decomp = exp
+ } else {
+ char.compatDecomp = true
+ }
+ if len(decmap) > 0 {
+ char.forms[FCompatibility].decomp = exp
+ }
+ }
+ if err := p.Err(); err != nil {
+ log.Fatal(err)
+ }
+}
+
+// compactCCC converts the sparse set of CCC values to a continguous one,
+// reducing the number of bits needed from 8 to 6.
+func compactCCC() {
+ m := make(map[uint8]uint8)
+ for i := range chars {
+ c := &chars[i]
+ m[c.ccc] = 0
+ }
+ cccs := []int{}
+ for v, _ := range m {
+ cccs = append(cccs, int(v))
+ }
+ sort.Ints(cccs)
+ for i, c := range cccs {
+ cccMap[uint8(i)] = uint8(c)
+ m[uint8(c)] = uint8(i)
+ }
+ for i := range chars {
+ c := &chars[i]
+ c.origCCC = c.ccc
+ c.ccc = m[c.ccc]
+ }
+ if len(m) >= 1<<6 {
+ log.Fatalf("too many difference CCC values: %d >= 64", len(m))
+ }
+}
+
+// CompositionExclusions.txt has form:
+// 0958 # ...
+// See http://unicode.org/reports/tr44/ for full explanation
+func loadCompositionExclusions() {
+ f := gen.OpenUCDFile("CompositionExclusions.txt")
+ defer f.Close()
+ p := ucd.New(f)
+ for p.Next() {
+ c := &chars[p.Rune(0)]
+ if c.excludeInComp {
+ log.Fatalf("%U: Duplicate entry in exclusions.", c.codePoint)
+ }
+ c.excludeInComp = true
+ }
+ if e := p.Err(); e != nil {
+ log.Fatal(e)
+ }
+}
+
+// hasCompatDecomp returns true if any of the recursive
+// decompositions contains a compatibility expansion.
+// In this case, the character may not occur in NFK*.
+func hasCompatDecomp(r rune) bool {
+ c := &chars[r]
+ if c.compatDecomp {
+ return true
+ }
+ for _, d := range c.forms[FCompatibility].decomp {
+ if hasCompatDecomp(d) {
+ return true
+ }
+ }
+ return false
+}
+
+// Hangul related constants.
+const (
+ HangulBase = 0xAC00
+ HangulEnd = 0xD7A4 // hangulBase + Jamo combinations (19 * 21 * 28)
+
+ JamoLBase = 0x1100
+ JamoLEnd = 0x1113
+ JamoVBase = 0x1161
+ JamoVEnd = 0x1176
+ JamoTBase = 0x11A8
+ JamoTEnd = 0x11C3
+
+ JamoLVTCount = 19 * 21 * 28
+ JamoTCount = 28
+)
+
+func isHangul(r rune) bool {
+ return HangulBase <= r && r < HangulEnd
+}
+
+func isHangulWithoutJamoT(r rune) bool {
+ if !isHangul(r) {
+ return false
+ }
+ r -= HangulBase
+ return r < JamoLVTCount && r%JamoTCount == 0
+}
+
+func ccc(r rune) uint8 {
+ return chars[r].ccc
+}
+
+// Insert a rune in a buffer, ordered by Canonical Combining Class.
+func insertOrdered(b Decomposition, r rune) Decomposition {
+ n := len(b)
+ b = append(b, 0)
+ cc := ccc(r)
+ if cc > 0 {
+ // Use bubble sort.
+ for ; n > 0; n-- {
+ if ccc(b[n-1]) <= cc {
+ break
+ }
+ b[n] = b[n-1]
+ }
+ }
+ b[n] = r
+ return b
+}
+
+// Recursively decompose.
+func decomposeRecursive(form int, r rune, d Decomposition) Decomposition {
+ dcomp := chars[r].forms[form].decomp
+ if len(dcomp) == 0 {
+ return insertOrdered(d, r)
+ }
+ for _, c := range dcomp {
+ d = decomposeRecursive(form, c, d)
+ }
+ return d
+}
+
+func completeCharFields(form int) {
+ // Phase 0: pre-expand decomposition.
+ for i := range chars {
+ f := &chars[i].forms[form]
+ if len(f.decomp) == 0 {
+ continue
+ }
+ exp := make(Decomposition, 0)
+ for _, c := range f.decomp {
+ exp = decomposeRecursive(form, c, exp)
+ }
+ f.expandedDecomp = exp
+ }
+
+ // Phase 1: composition exclusion, mark decomposition.
+ for i := range chars {
+ c := &chars[i]
+ f := &c.forms[form]
+
+ // Marks script-specific exclusions and version restricted.
+ f.isOneWay = c.excludeInComp
+
+ // Singletons
+ f.isOneWay = f.isOneWay || len(f.decomp) == 1
+
+ // Non-starter decompositions
+ if len(f.decomp) > 1 {
+ chk := c.ccc != 0 || chars[f.decomp[0]].ccc != 0
+ f.isOneWay = f.isOneWay || chk
+ }
+
+ // Runes that decompose into more than two runes.
+ f.isOneWay = f.isOneWay || len(f.decomp) > 2
+
+ if form == FCompatibility {
+ f.isOneWay = f.isOneWay || hasCompatDecomp(c.codePoint)
+ }
+
+ for _, r := range f.decomp {
+ chars[r].forms[form].inDecomp = true
+ }
+ }
+
+ // Phase 2: forward and backward combining.
+ for i := range chars {
+ c := &chars[i]
+ f := &c.forms[form]
+
+ if !f.isOneWay && len(f.decomp) == 2 {
+ f0 := &chars[f.decomp[0]].forms[form]
+ f1 := &chars[f.decomp[1]].forms[form]
+ if !f0.isOneWay {
+ f0.combinesForward = true
+ }
+ if !f1.isOneWay {
+ f1.combinesBackward = true
+ }
+ }
+ if isHangulWithoutJamoT(rune(i)) {
+ f.combinesForward = true
+ }
+ }
+
+ // Phase 3: quick check values.
+ for i := range chars {
+ c := &chars[i]
+ f := &c.forms[form]
+
+ switch {
+ case len(f.decomp) > 0:
+ f.quickCheck[MDecomposed] = QCNo
+ case isHangul(rune(i)):
+ f.quickCheck[MDecomposed] = QCNo
+ default:
+ f.quickCheck[MDecomposed] = QCYes
+ }
+ switch {
+ case f.isOneWay:
+ f.quickCheck[MComposed] = QCNo
+ case (i & 0xffff00) == JamoLBase:
+ f.quickCheck[MComposed] = QCYes
+ if JamoLBase <= i && i < JamoLEnd {
+ f.combinesForward = true
+ }
+ if JamoVBase <= i && i < JamoVEnd {
+ f.quickCheck[MComposed] = QCMaybe
+ f.combinesBackward = true
+ f.combinesForward = true
+ }
+ if JamoTBase <= i && i < JamoTEnd {
+ f.quickCheck[MComposed] = QCMaybe
+ f.combinesBackward = true
+ }
+ case !f.combinesBackward:
+ f.quickCheck[MComposed] = QCYes
+ default:
+ f.quickCheck[MComposed] = QCMaybe
+ }
+ }
+}
+
+func computeNonStarterCounts() {
+ // Phase 4: leading and trailing non-starter count
+ for i := range chars {
+ c := &chars[i]
+
+ runes := []rune{rune(i)}
+ // We always use FCompatibility so that the CGJ insertion points do not
+ // change for repeated normalizations with different forms.
+ if exp := c.forms[FCompatibility].expandedDecomp; len(exp) > 0 {
+ runes = exp
+ }
+ // We consider runes that combine backwards to be non-starters for the
+ // purpose of Stream-Safe Text Processing.
+ for _, r := range runes {
+ if cr := &chars[r]; cr.ccc == 0 && !cr.forms[FCompatibility].combinesBackward {
+ break
+ }
+ c.nLeadingNonStarters++
+ }
+ for i := len(runes) - 1; i >= 0; i-- {
+ if cr := &chars[runes[i]]; cr.ccc == 0 && !cr.forms[FCompatibility].combinesBackward {
+ break
+ }
+ c.nTrailingNonStarters++
+ }
+ if c.nTrailingNonStarters > 3 {
+ log.Fatalf("%U: Decomposition with more than 3 (%d) trailing modifiers (%U)", i, c.nTrailingNonStarters, runes)
+ }
+
+ if isHangul(rune(i)) {
+ c.nTrailingNonStarters = 2
+ if isHangulWithoutJamoT(rune(i)) {
+ c.nTrailingNonStarters = 1
+ }
+ }
+
+ if l, t := c.nLeadingNonStarters, c.nTrailingNonStarters; l > 0 && l != t {
+ log.Fatalf("%U: number of leading and trailing non-starters should be equal (%d vs %d)", i, l, t)
+ }
+ if t := c.nTrailingNonStarters; t > 3 {
+ log.Fatalf("%U: number of trailing non-starters is %d > 3", t)
+ }
+ }
+}
+
+func printBytes(w io.Writer, b []byte, name string) {
+ fmt.Fprintf(w, "// %s: %d bytes\n", name, len(b))
+ fmt.Fprintf(w, "var %s = [...]byte {", name)
+ for i, c := range b {
+ switch {
+ case i%64 == 0:
+ fmt.Fprintf(w, "\n// Bytes %x - %x\n", i, i+63)
+ case i%8 == 0:
+ fmt.Fprintf(w, "\n")
+ }
+ fmt.Fprintf(w, "0x%.2X, ", c)
+ }
+ fmt.Fprint(w, "\n}\n\n")
+}
+
+// See forminfo.go for format.
+func makeEntry(f *FormInfo, c *Char) uint16 {
+ e := uint16(0)
+ if r := c.codePoint; HangulBase <= r && r < HangulEnd {
+ e |= 0x40
+ }
+ if f.combinesForward {
+ e |= 0x20
+ }
+ if f.quickCheck[MDecomposed] == QCNo {
+ e |= 0x4
+ }
+ switch f.quickCheck[MComposed] {
+ case QCYes:
+ case QCNo:
+ e |= 0x10
+ case QCMaybe:
+ e |= 0x18
+ default:
+ log.Fatalf("Illegal quickcheck value %v.", f.quickCheck[MComposed])
+ }
+ e |= uint16(c.nTrailingNonStarters)
+ return e
+}
+
+// decompSet keeps track of unique decompositions, grouped by whether
+// the decomposition is followed by a trailing and/or leading CCC.
+type decompSet [7]map[string]bool
+
+const (
+ normalDecomp = iota
+ firstMulti
+ firstCCC
+ endMulti
+ firstLeadingCCC
+ firstCCCZeroExcept
+ firstStarterWithNLead
+ lastDecomp
+)
+
+var cname = []string{"firstMulti", "firstCCC", "endMulti", "firstLeadingCCC", "firstCCCZeroExcept", "firstStarterWithNLead", "lastDecomp"}
+
+func makeDecompSet() decompSet {
+ m := decompSet{}
+ for i := range m {
+ m[i] = make(map[string]bool)
+ }
+ return m
+}
+func (m *decompSet) insert(key int, s string) {
+ m[key][s] = true
+}
+
+func printCharInfoTables(w io.Writer) int {
+ mkstr := func(r rune, f *FormInfo) (int, string) {
+ d := f.expandedDecomp
+ s := string([]rune(d))
+ if max := 1 << 6; len(s) >= max {
+ const msg = "%U: too many bytes in decomposition: %d >= %d"
+ log.Fatalf(msg, r, len(s), max)
+ }
+ head := uint8(len(s))
+ if f.quickCheck[MComposed] != QCYes {
+ head |= 0x40
+ }
+ if f.combinesForward {
+ head |= 0x80
+ }
+ s = string([]byte{head}) + s
+
+ lccc := ccc(d[0])
+ tccc := ccc(d[len(d)-1])
+ cc := ccc(r)
+ if cc != 0 && lccc == 0 && tccc == 0 {
+ log.Fatalf("%U: trailing and leading ccc are 0 for non-zero ccc %d", r, cc)
+ }
+ if tccc < lccc && lccc != 0 {
+ const msg = "%U: lccc (%d) must be <= tcc (%d)"
+ log.Fatalf(msg, r, lccc, tccc)
+ }
+ index := normalDecomp
+ nTrail := chars[r].nTrailingNonStarters
+ if tccc > 0 || lccc > 0 || nTrail > 0 {
+ tccc <<= 2
+ tccc |= nTrail
+ s += string([]byte{tccc})
+ index = endMulti
+ for _, r := range d[1:] {
+ if ccc(r) == 0 {
+ index = firstCCC
+ }
+ }
+ if lccc > 0 {
+ s += string([]byte{lccc})
+ if index == firstCCC {
+ log.Fatalf("%U: multi-segment decomposition not supported for decompositions with leading CCC != 0", r)
+ }
+ index = firstLeadingCCC
+ }
+ if cc != lccc {
+ if cc != 0 {
+ log.Fatalf("%U: for lccc != ccc, expected ccc to be 0; was %d", r, cc)
+ }
+ index = firstCCCZeroExcept
+ }
+ } else if len(d) > 1 {
+ index = firstMulti
+ }
+ return index, s
+ }
+
+ decompSet := makeDecompSet()
+ const nLeadStr = "\x00\x01" // 0-byte length and tccc with nTrail.
+ decompSet.insert(firstStarterWithNLead, nLeadStr)
+
+ // Store the uniqued decompositions in a byte buffer,
+ // preceded by their byte length.
+ for _, c := range chars {
+ for _, f := range c.forms {
+ if len(f.expandedDecomp) == 0 {
+ continue
+ }
+ if f.combinesBackward {
+ log.Fatalf("%U: combinesBackward and decompose", c.codePoint)
+ }
+ index, s := mkstr(c.codePoint, &f)
+ decompSet.insert(index, s)
+ }
+ }
+
+ decompositions := bytes.NewBuffer(make([]byte, 0, 10000))
+ size := 0
+ positionMap := make(map[string]uint16)
+ decompositions.WriteString("\000")
+ fmt.Fprintln(w, "const (")
+ for i, m := range decompSet {
+ sa := []string{}
+ for s := range m {
+ sa = append(sa, s)
+ }
+ sort.Strings(sa)
+ for _, s := range sa {
+ p := decompositions.Len()
+ decompositions.WriteString(s)
+ positionMap[s] = uint16(p)
+ }
+ if cname[i] != "" {
+ fmt.Fprintf(w, "%s = 0x%X\n", cname[i], decompositions.Len())
+ }
+ }
+ fmt.Fprintln(w, "maxDecomp = 0x8000")
+ fmt.Fprintln(w, ")")
+ b := decompositions.Bytes()
+ printBytes(w, b, "decomps")
+ size += len(b)
+
+ varnames := []string{"nfc", "nfkc"}
+ for i := 0; i < FNumberOfFormTypes; i++ {
+ trie := triegen.NewTrie(varnames[i])
+
+ for r, c := range chars {
+ f := c.forms[i]
+ d := f.expandedDecomp
+ if len(d) != 0 {
+ _, key := mkstr(c.codePoint, &f)
+ trie.Insert(rune(r), uint64(positionMap[key]))
+ if c.ccc != ccc(d[0]) {
+ // We assume the lead ccc of a decomposition !=0 in this case.
+ if ccc(d[0]) == 0 {
+ log.Fatalf("Expected leading CCC to be non-zero; ccc is %d", c.ccc)
+ }
+ }
+ } else if c.nLeadingNonStarters > 0 && len(f.expandedDecomp) == 0 && c.ccc == 0 && !f.combinesBackward {
+ // Handle cases where it can't be detected that the nLead should be equal
+ // to nTrail.
+ trie.Insert(c.codePoint, uint64(positionMap[nLeadStr]))
+ } else if v := makeEntry(&f, &c)<<8 | uint16(c.ccc); v != 0 {
+ trie.Insert(c.codePoint, uint64(0x8000|v))
+ }
+ }
+ sz, err := trie.Gen(w, triegen.Compact(&normCompacter{name: varnames[i]}))
+ if err != nil {
+ log.Fatal(err)
+ }
+ size += sz
+ }
+ return size
+}
+
+func contains(sa []string, s string) bool {
+ for _, a := range sa {
+ if a == s {
+ return true
+ }
+ }
+ return false
+}
+
+func makeTables() {
+ w := &bytes.Buffer{}
+
+ size := 0
+ if *tablelist == "" {
+ return
+ }
+ list := strings.Split(*tablelist, ",")
+ if *tablelist == "all" {
+ list = []string{"recomp", "info"}
+ }
+
+ // Compute maximum decomposition size.
+ max := 0
+ for _, c := range chars {
+ if n := len(string(c.forms[FCompatibility].expandedDecomp)); n > max {
+ max = n
+ }
+ }
+
+ fmt.Fprintln(w, "const (")
+ fmt.Fprintln(w, "\t// Version is the Unicode edition from which the tables are derived.")
+ fmt.Fprintf(w, "\tVersion = %q\n", gen.UnicodeVersion())
+ fmt.Fprintln(w)
+ fmt.Fprintln(w, "\t// MaxTransformChunkSize indicates the maximum number of bytes that Transform")
+ fmt.Fprintln(w, "\t// may need to write atomically for any Form. Making a destination buffer at")
+ fmt.Fprintln(w, "\t// least this size ensures that Transform can always make progress and that")
+ fmt.Fprintln(w, "\t// the user does not need to grow the buffer on an ErrShortDst.")
+ fmt.Fprintf(w, "\tMaxTransformChunkSize = %d+maxNonStarters*4\n", len(string(0x034F))+max)
+ fmt.Fprintln(w, ")\n")
+
+ // Print the CCC remap table.
+ size += len(cccMap)
+ fmt.Fprintf(w, "var ccc = [%d]uint8{", len(cccMap))
+ for i := 0; i < len(cccMap); i++ {
+ if i%8 == 0 {
+ fmt.Fprintln(w)
+ }
+ fmt.Fprintf(w, "%3d, ", cccMap[uint8(i)])
+ }
+ fmt.Fprintln(w, "\n}\n")
+
+ if contains(list, "info") {
+ size += printCharInfoTables(w)
+ }
+
+ if contains(list, "recomp") {
+ // Note that we use 32 bit keys, instead of 64 bit.
+ // This clips the bits of three entries, but we know
+ // this won't cause a collision. The compiler will catch
+ // any changes made to UnicodeData.txt that introduces
+ // a collision.
+ // Note that the recomposition map for NFC and NFKC
+ // are identical.
+
+ // Recomposition map
+ nrentries := 0
+ for _, c := range chars {
+ f := c.forms[FCanonical]
+ if !f.isOneWay && len(f.decomp) > 0 {
+ nrentries++
+ }
+ }
+ sz := nrentries * 8
+ size += sz
+ fmt.Fprintf(w, "// recompMap: %d bytes (entries only)\n", sz)
+ fmt.Fprintln(w, "var recompMap = map[uint32]rune{")
+ for i, c := range chars {
+ f := c.forms[FCanonical]
+ d := f.decomp
+ if !f.isOneWay && len(d) > 0 {
+ key := uint32(uint16(d[0]))<<16 + uint32(uint16(d[1]))
+ fmt.Fprintf(w, "0x%.8X: 0x%.4X,\n", key, i)
+ }
+ }
+ fmt.Fprintf(w, "}\n\n")
+ }
+
+ fmt.Fprintf(w, "// Total size of tables: %dKB (%d bytes)\n", (size+512)/1024, size)
+ gen.WriteGoFile("tables.go", "norm", w.Bytes())
+}
+
+func printChars() {
+ if *verbose {
+ for _, c := range chars {
+ if !c.isValid() || c.state == SMissing {
+ continue
+ }
+ fmt.Println(c)
+ }
+ }
+}
+
+// verifyComputed does various consistency tests.
+func verifyComputed() {
+ for i, c := range chars {
+ for _, f := range c.forms {
+ isNo := (f.quickCheck[MDecomposed] == QCNo)
+ if (len(f.decomp) > 0) != isNo && !isHangul(rune(i)) {
+ log.Fatalf("%U: NF*D QC must be No if rune decomposes", i)
+ }
+
+ isMaybe := f.quickCheck[MComposed] == QCMaybe
+ if f.combinesBackward != isMaybe {
+ log.Fatalf("%U: NF*C QC must be Maybe if combinesBackward", i)
+ }
+ if len(f.decomp) > 0 && f.combinesForward && isMaybe {
+ log.Fatalf("%U: NF*C QC must be Yes or No if combinesForward and decomposes", i)
+ }
+
+ if len(f.expandedDecomp) != 0 {
+ continue
+ }
+ if a, b := c.nLeadingNonStarters > 0, (c.ccc > 0 || f.combinesBackward); a != b {
+ // We accept these runes to be treated differently (it only affects
+ // segment breaking in iteration, most likely on improper use), but
+ // reconsider if more characters are added.
+ // U+FF9E HALFWIDTH KATAKANA VOICED SOUND MARK;Lm;0;L;<narrow> 3099;;;;N;;;;;
+ // U+FF9F HALFWIDTH KATAKANA SEMI-VOICED SOUND MARK;Lm;0;L;<narrow> 309A;;;;N;;;;;
+ // U+3133 HANGUL LETTER KIYEOK-SIOS;Lo;0;L;<compat> 11AA;;;;N;HANGUL LETTER GIYEOG SIOS;;;;
+ // U+318E HANGUL LETTER ARAEAE;Lo;0;L;<compat> 11A1;;;;N;HANGUL LETTER ALAE AE;;;;
+ // U+FFA3 HALFWIDTH HANGUL LETTER KIYEOK-SIOS;Lo;0;L;<narrow> 3133;;;;N;HALFWIDTH HANGUL LETTER GIYEOG SIOS;;;;
+ // U+FFDC HALFWIDTH HANGUL LETTER I;Lo;0;L;<narrow> 3163;;;;N;;;;;
+ if i != 0xFF9E && i != 0xFF9F && !(0x3133 <= i && i <= 0x318E) && !(0xFFA3 <= i && i <= 0xFFDC) {
+ log.Fatalf("%U: nLead was %v; want %v", i, a, b)
+ }
+ }
+ }
+ nfc := c.forms[FCanonical]
+ nfkc := c.forms[FCompatibility]
+ if nfc.combinesBackward != nfkc.combinesBackward {
+ log.Fatalf("%U: Cannot combine combinesBackward\n", c.codePoint)
+ }
+ }
+}
+
+// Use values in DerivedNormalizationProps.txt to compare against the
+// values we computed.
+// DerivedNormalizationProps.txt has form:
+// 00C0..00C5 ; NFD_QC; N # ...
+// 0374 ; NFD_QC; N # ...
+// See http://unicode.org/reports/tr44/ for full explanation
+func testDerived() {
+ f := gen.OpenUCDFile("DerivedNormalizationProps.txt")
+ defer f.Close()
+ p := ucd.New(f)
+ for p.Next() {
+ r := p.Rune(0)
+ c := &chars[r]
+
+ var ftype, mode int
+ qt := p.String(1)
+ switch qt {
+ case "NFC_QC":
+ ftype, mode = FCanonical, MComposed
+ case "NFD_QC":
+ ftype, mode = FCanonical, MDecomposed
+ case "NFKC_QC":
+ ftype, mode = FCompatibility, MComposed
+ case "NFKD_QC":
+ ftype, mode = FCompatibility, MDecomposed
+ default:
+ continue
+ }
+ var qr QCResult
+ switch p.String(2) {
+ case "Y":
+ qr = QCYes
+ case "N":
+ qr = QCNo
+ case "M":
+ qr = QCMaybe
+ default:
+ log.Fatalf(`Unexpected quick check value "%s"`, p.String(2))
+ }
+ if got := c.forms[ftype].quickCheck[mode]; got != qr {
+ log.Printf("%U: FAILED %s (was %v need %v)\n", r, qt, got, qr)
+ }
+ c.forms[ftype].verified[mode] = true
+ }
+ if err := p.Err(); err != nil {
+ log.Fatal(err)
+ }
+ // Any unspecified value must be QCYes. Verify this.
+ for i, c := range chars {
+ for j, fd := range c.forms {
+ for k, qr := range fd.quickCheck {
+ if !fd.verified[k] && qr != QCYes {
+ m := "%U: FAIL F:%d M:%d (was %v need Yes) %s\n"
+ log.Printf(m, i, j, k, qr, c.name)
+ }
+ }
+ }
+ }
+}
+
+var testHeader = `const (
+ Yes = iota
+ No
+ Maybe
+)
+
+type formData struct {
+ qc uint8
+ combinesForward bool
+ decomposition string
+}
+
+type runeData struct {
+ r rune
+ ccc uint8
+ nLead uint8
+ nTrail uint8
+ f [2]formData // 0: canonical; 1: compatibility
+}
+
+func f(qc uint8, cf bool, dec string) [2]formData {
+ return [2]formData{{qc, cf, dec}, {qc, cf, dec}}
+}
+
+func g(qc, qck uint8, cf, cfk bool, d, dk string) [2]formData {
+ return [2]formData{{qc, cf, d}, {qck, cfk, dk}}
+}
+
+var testData = []runeData{
+`
+
+func printTestdata() {
+ type lastInfo struct {
+ ccc uint8
+ nLead uint8
+ nTrail uint8
+ f string
+ }
+
+ last := lastInfo{}
+ w := &bytes.Buffer{}
+ fmt.Fprintf(w, testHeader)
+ for r, c := range chars {
+ f := c.forms[FCanonical]
+ qc, cf, d := f.quickCheck[MComposed], f.combinesForward, string(f.expandedDecomp)
+ f = c.forms[FCompatibility]
+ qck, cfk, dk := f.quickCheck[MComposed], f.combinesForward, string(f.expandedDecomp)
+ s := ""
+ if d == dk && qc == qck && cf == cfk {
+ s = fmt.Sprintf("f(%s, %v, %q)", qc, cf, d)
+ } else {
+ s = fmt.Sprintf("g(%s, %s, %v, %v, %q, %q)", qc, qck, cf, cfk, d, dk)
+ }
+ current := lastInfo{c.ccc, c.nLeadingNonStarters, c.nTrailingNonStarters, s}
+ if last != current {
+ fmt.Fprintf(w, "\t{0x%x, %d, %d, %d, %s},\n", r, c.origCCC, c.nLeadingNonStarters, c.nTrailingNonStarters, s)
+ last = current
+ }
+ }
+ fmt.Fprintln(w, "}")
+ gen.WriteGoFile("data_test.go", "norm", w.Bytes())
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-29 14:03:42 +0000