--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/github.com/yosssi/gcss/parse.go	Sun Jul 23 13:18:53 2023 +0000
@@ -0,0 +1,115 @@
+package gcss
+
+import "strings"
+
+// Special characters
+const (
+	cr               = "\r"
+	lf               = "\n"
+	crlf             = "\r\n"
+	space            = " "
+	colon            = ":"
+	comma            = ","
+	openBrace        = "{"
+	closeBrace       = "}"
+	semicolon        = ";"
+	ampersand        = "&"
+	atMark           = "@"
+	dollarMark       = "$"
+	openParenthesis  = "("
+	closeParenthesis = ")"
+	slash            = "/"
+	doubleSlash      = slash + slash
+)
+
+// parse parses the string, generates the elements
+// and returns the two channels: the first one returns
+// the generated elements and the last one returns
+// an error when it occurs.
+func parse(lines []string) (<-chan element, <-chan error) {
+	elemc := make(chan element, len(lines))
+	errc := make(chan error)
+
+	go func() {
+		i := 0
+		l := len(lines)
+
+		for i < l {
+			// Fetch a line.
+			ln := newLine(i+1, lines[i])
+			i++
+
+			// Ignore the empty line.
+			if ln.isEmpty() {
+				continue
+			}
+
+			if ln.isTopIndent() {
+				elem, err := newElement(ln, nil)
+
+				if err != nil {
+					errc <- err
+					return
+				}
+
+				if err := appendChildren(elem, lines, &i, l); err != nil {
+					errc <- err
+					return
+				}
+
+				elemc <- elem
+			}
+		}
+
+		close(elemc)
+	}()
+
+	return elemc, errc
+}
+
+// appendChildren parses the lines and appends the child elements
+// to the parent element.
+func appendChildren(parent element, lines []string, i *int, l int) error {
+	for *i < l {
+		// Fetch a line.
+		ln := newLine(*i+1, lines[*i])
+
+		// Ignore the empty line.
+		if ln.isEmpty() {
+			*i++
+			return nil
+		}
+
+		ok, err := ln.childOf(parent)
+
+		if err != nil {
+			return err
+		}
+
+		if !ok {
+			return nil
+		}
+
+		child, err := newElement(ln, parent)
+
+		if err != nil {
+			return err
+		}
+
+		parent.AppendChild(child)
+
+		*i++
+
+		if err := appendChildren(child, lines, i, l); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// formatLF replaces the line feed codes with LF and
+// returns the result string.
+func formatLF(s string) string {
+	return strings.Replace(strings.Replace(s, crlf, lf, -1), cr, lf, -1)
+}