1 files changed, 119 insertions, 0 deletions
diff --git a/vendor/golang.org/x/text/internal/number/plural.go b/vendor/golang.org/x/text/internal/number/plural.go
new file mode 100644
index 000000000..5714e1128
--- /dev/null
+++ b/vendor/golang.org/x/text/internal/number/plural.go
@@ -0,0 +1,119 @@
+// Copyright 2016 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 number
+
+import "golang.org/x/text/internal/format/plural"
+
+type pluralRules struct {
+	rules          []pluralCheck
+	index          []byte
+	langToIndex    []byte
+	inclusionMasks []uint64
+}
+
+var (
+	ordinalData = pluralRules{
+		ordinalRules,
+		ordinalIndex,
+		ordinalLangToIndex,
+		ordinalInclusionMasks[:],
+	}
+	cardinalData = pluralRules{
+		cardinalRules,
+		cardinalIndex,
+		cardinalLangToIndex,
+		cardinalInclusionMasks[:],
+	}
+)
+
+// See gen_plural.go for an explanation of the algorithm.
+
+func matchPlural(p *pluralRules, index int, n, f, v int) plural.Form {
+	nMask := p.inclusionMasks[n%maxMod]
+	// Compute the fMask inline in the rules below, as it is relatively rare.
+	// fMask := p.inclusionMasks[f%maxMod]
+	vMask := p.inclusionMasks[v%maxMod]
+
+	// Do the matching
+	offset := p.langToIndex[index]
+	rules := p.rules[p.index[offset]:p.index[offset+1]]
+	for i := 0; i < len(rules); i++ {
+		rule := rules[i]
+		setBit := uint64(1 << rule.setID)
+		var skip bool
+		switch op := opID(rule.cat >> opShift); op {
+		case opI: // i = x
+			skip = n >= numN || nMask&setBit == 0
+
+		case opI | opNotEqual: // i != x
+			skip = n < numN && nMask&setBit != 0
+
+		case opI | opMod: // i % m = x
+			skip = nMask&setBit == 0
+
+		case opI | opMod | opNotEqual: // i % m != x
+			skip = nMask&setBit != 0
+
+		case opN: // n = x
+			skip = f != 0 || n >= numN || nMask&setBit == 0
+
+		case opN | opNotEqual: // n != x
+			skip = f == 0 && n < numN && nMask&setBit != 0
+
+		case opN | opMod: // n % m = x
+			skip = f != 0 || nMask&setBit == 0
+
+		case opN | opMod | opNotEqual: // n % m != x
+			skip = f == 0 && nMask&setBit != 0
+
+		case opF: // f = x
+			skip = f >= numN || p.inclusionMasks[f%maxMod]&setBit == 0
+
+		case opF | opNotEqual: // f != x
+			skip = f < numN && p.inclusionMasks[f%maxMod]&setBit != 0
+
+		case opF | opMod: // f % m = x
+			skip = p.inclusionMasks[f%maxMod]&setBit == 0
+
+		case opF | opMod | opNotEqual: // f % m != x
+			skip = p.inclusionMasks[f%maxMod]&setBit != 0
+
+		case opV: // v = x
+			skip = v < numN && vMask&setBit == 0
+
+		case opV | opNotEqual: // v != x
+			skip = v < numN && vMask&setBit != 0
+
+		case opW: // w == 0
+			skip = f != 0
+
+		case opW | opNotEqual: // w != 0
+			skip = f == 0
+
+		// Hard-wired rules that cannot be handled by our algorithm.
+
+		case opBretonM:
+			skip = f != 0 || n == 0 || n%1000000 != 0
+
+		case opAzerbaijan00s:
+			// 100,200,300,400,500,600,700,800,900
+			skip = n == 0 || n >= 1000 || n%100 != 0
+
+		case opItalian800:
+			skip = (f != 0 || n >= numN || nMask&setBit == 0) && n != 800
+		}
+		if skip {
+			// advance over AND entries.
+			for ; i < len(rules) && rules[i].cat&formMask == andNext; i++ {
+			}
+			continue
+		}
+		// return if we have a final entry.
+		if cat := rule.cat & formMask; cat != andNext {
+			return plural.Form(cat)
+		}
+	}
+	return plural.Other
+}