1 files changed, 84 insertions, 0 deletions
diff --git a/vendor/github.com/cilium/ebpf/internal/output.go b/vendor/github.com/cilium/ebpf/internal/output.go
new file mode 100644
index 000000000..aeab37fcf
--- /dev/null
+++ b/vendor/github.com/cilium/ebpf/internal/output.go
@@ -0,0 +1,84 @@
+package internal
+
+import (
+	"bytes"
+	"errors"
+	"go/format"
+	"go/scanner"
+	"io"
+	"strings"
+	"unicode"
+)
+
+// Identifier turns a C style type or field name into an exportable Go equivalent.
+func Identifier(str string) string {
+	prev := rune(-1)
+	return strings.Map(func(r rune) rune {
+		// See https://golang.org/ref/spec#Identifiers
+		switch {
+		case unicode.IsLetter(r):
+			if prev == -1 {
+				r = unicode.ToUpper(r)
+			}
+
+		case r == '_':
+			switch {
+			// The previous rune was deleted, or we are at the
+			// beginning of the string.
+			case prev == -1:
+				fallthrough
+
+			// The previous rune is a lower case letter or a digit.
+			case unicode.IsDigit(prev) || (unicode.IsLetter(prev) && unicode.IsLower(prev)):
+				// delete the current rune, and force the
+				// next character to be uppercased.
+				r = -1
+			}
+
+		case unicode.IsDigit(r):
+
+		default:
+			// Delete the current rune. prev is unchanged.
+			return -1
+		}
+
+		prev = r
+		return r
+	}, str)
+}
+
+// WriteFormatted outputs a formatted src into out.
+//
+// If formatting fails it returns an informative error message.
+func WriteFormatted(src []byte, out io.Writer) error {
+	formatted, err := format.Source(src)
+	if err == nil {
+		_, err = out.Write(formatted)
+		return err
+	}
+
+	var el scanner.ErrorList
+	if !errors.As(err, &el) {
+		return err
+	}
+
+	var nel scanner.ErrorList
+	for _, err := range el {
+		if !err.Pos.IsValid() {
+			nel = append(nel, err)
+			continue
+		}
+
+		buf := src[err.Pos.Offset:]
+		nl := bytes.IndexRune(buf, '\n')
+		if nl == -1 {
+			nel = append(nel, err)
+			continue
+		}
+
+		err.Msg += ": " + string(buf[:nl])
+		nel = append(nel, err)
+	}
+
+	return nel
+}