1 files changed, 28 insertions, 0 deletions
diff --git a/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/gopherjs/gopherjs/compiler/natives/src/unicode/unicode.go b/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/gopherjs/gopherjs/compiler/natives/src/unicode/unicode.go
new file mode 100644
index 00000000000..e9231765140
--- /dev/null
+++ b/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/github.com/gopherjs/gopherjs/compiler/natives/src/unicode/unicode.go
@@ -0,0 +1,28 @@
+// +build js
+
+package unicode
+
+func to(_case int, r rune, caseRange []CaseRange) (mappedRune rune, foundMapping bool) {
+	if _case < 0 || MaxCase <= _case {
+		return ReplacementChar, false
+	}
+	lo := 0
+	hi := len(caseRange)
+	for lo < hi {
+		m := lo + (hi-lo)/2
+		cr := &caseRange[m] // performance critical for GopherJS: get address here instead of copying the CaseRange
+		if rune(cr.Lo) <= r && r <= rune(cr.Hi) {
+			delta := rune(cr.Delta[_case])
+			if delta > MaxRune {
+				return rune(cr.Lo) + ((r-rune(cr.Lo))&^1 | rune(_case&1)), true
+			}
+			return r + delta, true
+		}
+		if r < rune(cr.Lo) {
+			hi = m
+		} else {
+			lo = m + 1
+		}
+	}
+	return r, false
+}