added vendor

vendor/github.com/client9/misspell/case.go

@@ -0,0 +1,59 @@
+package misspell
+
+import (
+	"strings"
+)
+
+// WordCase is an enum of various word casing styles
+type WordCase int
+
+// Various WordCase types.. likely to be not correct
+const (
+	CaseUnknown WordCase = iota
+	CaseLower
+	CaseUpper
+	CaseTitle
+)
+
+// CaseStyle returns what case style a word is in
+func CaseStyle(word string) WordCase {
+	upperCount := 0
+	lowerCount := 0
+
+	// this iterates over RUNES not BYTES
+	for i := 0; i < len(word); i++ {
+		ch := word[i]
+		switch {
+		case ch >= 'a' && ch <= 'z':
+			lowerCount++
+		case ch >= 'A' && ch <= 'Z':
+			upperCount++
+		}
+	}
+
+	switch {
+	case upperCount != 0 && lowerCount == 0:
+		return CaseUpper
+	case upperCount == 0 && lowerCount != 0:
+		return CaseLower
+	case upperCount == 1 && lowerCount > 0 && word[0] >= 'A' && word[0] <= 'Z':
+		return CaseTitle
+	}
+	return CaseUnknown
+}
+
+// CaseVariations returns
+// If AllUpper or First-Letter-Only is upcased: add the all upper case version
+// If AllLower, add the original, the title and upcase forms
+// If Mixed, return the original, and the all upcase form
+//
+func CaseVariations(word string, style WordCase) []string {
+	switch style {
+	case CaseLower:
+		return []string{word, strings.ToUpper(word[0:1]) + word[1:], strings.ToUpper(word)}
+	case CaseUpper:
+		return []string{strings.ToUpper(word)}
+	default:
+		return []string{word, strings.ToUpper(word)}
+	}
+}