base64: Use extern C scope in header file, for C++.

[gnulib.git] / lib / base64.h

diff --git a/lib/base64.h b/lib/base64.h
index e125d7e..fc7307a 100644 (file)
--- a/lib/base64.h
+++ b/lib/base64.h
@@ -24,6 +24,10 @@
 /* Get bool. */
 # include <stdbool.h>
 
+# ifdef __cplusplus
+extern "C" {
+# endif
+
 /* This uses that the expression (n+(k-1))/k means the smallest
    integer >= n/k, i.e., the ceiling of n/k.  */
 # define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
@@ -57,4 +61,8 @@ extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
 #define base64_decode_alloc(in, inlen, out, outlen) \
         base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
 
+# ifdef __cplusplus
+}
+# endif
+
 #endif /* BASE64_H */