barometer: update DMA's vendoring packages

[barometer.git] / src / dma / vendor / golang.org / x / text / unicode / rangetable / rangetable.go

diff --git a/src/dma/vendor/golang.org/x/text/unicode/rangetable/rangetable.go b/src/dma/vendor/golang.org/x/text/unicode/rangetable/rangetable.go
new file mode 100644 (file)
index 0000000..187882c
--- /dev/null
+++ b/src/dma/vendor/golang.org/x/text/unicode/rangetable/rangetable.go
@@ -0,0 +1,70 @@
+// Copyright 2015 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 rangetable provides utilities for creating and inspecting
+// unicode.RangeTables.
+package rangetable
+
+import (
+       "sort"
+       "unicode"
+)
+
+// New creates a RangeTable from the given runes, which may contain duplicates.
+func New(r ...rune) *unicode.RangeTable {
+       if len(r) == 0 {
+               return &unicode.RangeTable{}
+       }
+
+       sort.Sort(byRune(r))
+
+       // Remove duplicates.
+       k := 1
+       for i := 1; i < len(r); i++ {
+               if r[k-1] != r[i] {
+                       r[k] = r[i]
+                       k++
+               }
+       }
+
+       var rt unicode.RangeTable
+       for _, r := range r[:k] {
+               if r <= 0xFFFF {
+                       rt.R16 = append(rt.R16, unicode.Range16{Lo: uint16(r), Hi: uint16(r), Stride: 1})
+               } else {
+                       rt.R32 = append(rt.R32, unicode.Range32{Lo: uint32(r), Hi: uint32(r), Stride: 1})
+               }
+       }
+
+       // Optimize RangeTable.
+       return Merge(&rt)
+}
+
+type byRune []rune
+
+func (r byRune) Len() int           { return len(r) }
+func (r byRune) Swap(i, j int)      { r[i], r[j] = r[j], r[i] }
+func (r byRune) Less(i, j int) bool { return r[i] < r[j] }
+
+// Visit visits all runes in the given RangeTable in order, calling fn for each.
+func Visit(rt *unicode.RangeTable, fn func(rune)) {
+       for _, r16 := range rt.R16 {
+               for r := rune(r16.Lo); r <= rune(r16.Hi); r += rune(r16.Stride) {
+                       fn(r)
+               }
+       }
+       for _, r32 := range rt.R32 {
+               for r := rune(r32.Lo); r <= rune(r32.Hi); r += rune(r32.Stride) {
+                       fn(r)
+               }
+       }
+}
+
+// Assigned returns a RangeTable with all assigned code points for a given
+// Unicode version. This includes graphic, format, control, and private-use
+// characters. It returns nil if the data for the given version is not
+// available.
+func Assigned(version string) *unicode.RangeTable {
+       return assigned[version]
+}