Chore: remove the entity kind registry (#79178)

pkg/util/svg.go

@@ -0,0 +1,56 @@
+// The MIT License
+//
+//Copyright (c) 2016 Tomas Aparicio
+//
+//Permission is hereby granted, free of charge, to any person
+//obtaining a copy of this software and associated documentation
+//files (the "Software"), to deal in the Software without
+//restriction, including without limitation the rights to use,
+//copy, modify, merge, publish, distribute, sublicense, and/or sell
+//copies of the Software, and to permit persons to whom the
+//Software is furnished to do so, subject to the following
+//conditions:
+//
+//The above copyright notice and this permission notice shall be
+//included in all copies or substantial portions of the Software.
+//
+//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+//EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+//OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+//NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+//HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+//WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+//OTHER DEALINGS IN THE SOFTWARE.
+
+package util
+
+import (
+	"regexp"
+	"unicode/utf8"
+)
+
+var (
+	// nolint:gosimple
+	htmlCommentRegex = regexp.MustCompile("(?i)<!--([\\s\\S]*?)-->")
+	svgRegex         = regexp.MustCompile(`(?i)^\s*(?:<\?xml[^>]*>\s*)?(?:<!doctype svg[^>]*>\s*)?<svg[^>]*>[^*]*<\/svg>\s*$`)
+)
+
+// isBinary checks if the given buffer is a binary file.
+func isBinary(buf []byte) bool {
+	if len(buf) < 24 {
+		return false
+	}
+	for i := 0; i < 24; i++ {
+		charCode, _ := utf8.DecodeRuneInString(string(buf[i]))
+		if charCode == 65533 || charCode <= 8 {
+			return true
+		}
+	}
+	return false
+}
+
+// Is returns true if the given buffer is a valid SVG image.
+func IsSVG(buf []byte) bool {
+	return !isBinary(buf) && svgRegex.Match(htmlCommentRegex.ReplaceAll(buf, []byte{}))
+}