1 files changed, 67 insertions, 0 deletions
diff --git a/vendor/github.com/uptrace/bun/internal/underscore.go b/vendor/github.com/uptrace/bun/internal/underscore.go
new file mode 100644
index 000000000..9de52fb7b
--- /dev/null
+++ b/vendor/github.com/uptrace/bun/internal/underscore.go
@@ -0,0 +1,67 @@
+package internal
+
+func IsUpper(c byte) bool {
+	return c >= 'A' && c <= 'Z'
+}
+
+func IsLower(c byte) bool {
+	return c >= 'a' && c <= 'z'
+}
+
+func ToUpper(c byte) byte {
+	return c - 32
+}
+
+func ToLower(c byte) byte {
+	return c + 32
+}
+
+// Underscore converts "CamelCasedString" to "camel_cased_string".
+func Underscore(s string) string {
+	r := make([]byte, 0, len(s)+5)
+	for i := 0; i < len(s); i++ {
+		c := s[i]
+		if IsUpper(c) {
+			if i > 0 && i+1 < len(s) && (IsLower(s[i-1]) || IsLower(s[i+1])) {
+				r = append(r, '_', ToLower(c))
+			} else {
+				r = append(r, ToLower(c))
+			}
+		} else {
+			r = append(r, c)
+		}
+	}
+	return string(r)
+}
+
+func CamelCased(s string) string {
+	r := make([]byte, 0, len(s))
+	upperNext := true
+	for i := 0; i < len(s); i++ {
+		c := s[i]
+		if c == '_' {
+			upperNext = true
+			continue
+		}
+		if upperNext {
+			if IsLower(c) {
+				c = ToUpper(c)
+			}
+			upperNext = false
+		}
+		r = append(r, c)
+	}
+	return string(r)
+}
+
+func ToExported(s string) string {
+	if len(s) == 0 {
+		return s
+	}
+	if c := s[0]; IsLower(c) {
+		b := []byte(s)
+		b[0] = ToUpper(c)
+		return string(b)
+	}
+	return s
+}