Add dependencies/vendor (whatsapp)

vendor/go.mau.fi/libsignal/util/errorhelper/ErrorHelper.go

@@ -0,0 +1,40 @@
+package errorhelper
+
+// NewMultiError returns a new MultiError object.
+func NewMultiError() *MultiError {
+	return &MultiError{
+		errors: []error{},
+	}
+}
+
+// MultiError is a structure for holding multiple errors so they
+// can be checked at a later point.
+type MultiError struct {
+	errors []error
+}
+
+// Add will add the given error if it is not nil.
+func (m *MultiError) Add(err error) {
+	if err != nil {
+		m.errors = append(m.errors, err)
+	}
+}
+
+// HasErrors will return true if any non-nil errors have been
+// added.
+func (m *MultiError) HasErrors() bool {
+	if len(m.errors) > 0 {
+		return true
+	}
+
+	return false
+}
+
+// Error will print the first error is encountered.
+func (m *MultiError) Error() string {
+	if !m.HasErrors() {
+		return ""
+	}
+
+	return m.errors[0].Error()
+}