1 files changed, 76 insertions, 0 deletions
diff --git a/config/extended_section.go b/config/extended_section.go
new file mode 100644
index 00000000..410009e7
--- /dev/null
+++ b/config/extended_section.go
@@ -0,0 +1,76 @@
+package config
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"strings"
+)
+
+func (p *configParser) parseExtendedSection(sectionName *bytes.Buffer) error {
+	for {
+		ch, err := p.nextChar()
+		if err != nil {
+			return errors.New("unexpected EOF in section header")
+		}
+
+		if !isWhitespace(ch) {
+			if ch != '"' {
+				return errors.New("expected quote after section name")
+			}
+
+			break
+		}
+	}
+
+	var subsec bytes.Buffer
+
+	for {
+		ch, err := p.nextChar()
+		if err != nil {
+			return errors.New("unexpected EOF in subsection")
+		}
+
+		if ch == '\n' {
+			return errors.New("newline in subsection")
+		}
+
+		if ch == '"' {
+			break
+		}
+
+		if ch == '\\' {
+			next, err := p.nextChar()
+			if err != nil {
+				return errors.New("unexpected EOF after backslash in subsection")
+			}
+
+			if next == '\n' {
+				return errors.New("newline after backslash in subsection")
+			}
+
+			subsec.WriteByte(next)
+		} else {
+			subsec.WriteByte(ch)
+		}
+	}
+
+	ch, err := p.nextChar()
+	if err != nil {
+		return errors.New("unexpected EOF after subsection")
+	}
+
+	if ch != ']' {
+		return fmt.Errorf("expected ']' after subsection, got %q", ch)
+	}
+
+	section := sectionName.String()
+	if !isValidSection(section) {
+		return fmt.Errorf("invalid section name: %q", section)
+	}
+
+	p.currentSection = strings.ToLower(section)
+	p.currentSubsec = subsec.String()
+
+	return nil
+}