From 1a6f9b807d2fad469035b25156cac94afda28751 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 22 Feb 2021 13:21:43 -0500
Subject: Move is_utf8_bom() to str.h

This moves is_utf8_bom() to str.h, and also adds two #defines, UTF8_BOM
and UTF8_BOM_SIZE.

Signed-off-by: Peter Jones <pjones@redhat.com>
---
 include/str.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'include')

diff --git a/include/str.h b/include/str.h
index 0c34256d..72f87b75 100644
--- a/include/str.h
+++ b/include/str.h
@@ -214,4 +214,15 @@ strntoken(char *str, size_t max, const char *delims, char **token, char *state)
 	return state_is_delim;
 }
 
+#define UTF8_BOM { 0xef, 0xbb, 0xbf }
+#define UTF8_BOM_SIZE 3
+
+static inline UNUSED NONNULL(1) BOOLEAN
+is_utf8_bom(CHAR8 *buf, size_t bufsize)
+{
+	unsigned char bom[] = UTF8_BOM;
+
+	return CompareMem(buf, bom, MIN(UTF8_BOM_SIZE, bufsize)) == 0;
+}
+
 #endif /* SHIM_STR_H */
-- 
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