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-rw-r--r--src/cmark_ctype.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/cmark_ctype.h b/src/cmark_ctype.h
index 7423f80..f803946 100644
--- a/src/cmark_ctype.h
+++ b/src/cmark_ctype.h
@@ -1,3 +1,10 @@
+#ifndef CMARK_CMARK_CTYPE_H
+#define CMARK_CMARK_CTYPE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/** Locale-independent versions of functions from ctype.h.
* We want cmark to behave the same no matter what the system locale.
*/
@@ -9,3 +16,9 @@ int cmark_ispunct(char c);
int cmark_isalnum(char c);
int cmark_isdigit(char c);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif