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Diffstat (limited to 'config/bom.go')
-rw-r--r--config/bom.go56
1 files changed, 56 insertions, 0 deletions
diff --git a/config/bom.go b/config/bom.go
new file mode 100644
index 00000000..48963e7f
--- /dev/null
+++ b/config/bom.go
@@ -0,0 +1,56 @@
+package config
+
+import (
+ "errors"
+ "io"
+)
+
+func (p *configParser) skipBOM() error {
+ first, err := p.reader.ReadByte()
+ if errors.Is(err, io.EOF) {
+ return nil
+ }
+
+ if err != nil {
+ return err
+ }
+
+ if first != 0xef {
+ _ = p.reader.UnreadByte()
+
+ return nil
+ }
+
+ second, err := p.reader.ReadByte()
+ if err != nil {
+ if errors.Is(err, io.EOF) {
+ _ = p.reader.UnreadByte()
+
+ return nil
+ }
+
+ return err
+ }
+
+ third, err := p.reader.ReadByte()
+ if err != nil {
+ if errors.Is(err, io.EOF) {
+ _ = p.reader.UnreadByte()
+ _ = p.reader.UnreadByte()
+
+ return nil
+ }
+
+ return err
+ }
+
+ if second == 0xbb && third == 0xbf {
+ return nil
+ }
+
+ _ = p.reader.UnreadByte()
+ _ = p.reader.UnreadByte()
+ _ = p.reader.UnreadByte()
+
+ return nil
+}