X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=util%2Fzlib-extra.h;h=296dc91441be04e0c32fbacd7938819750930c9b;hb=2c1f783f5f4ad28d89f2e83d7253bae7bba98440;hp=aedfd48fcb06b73e52ff3514e9fb152dec1b831e;hpb=f7130468d27c4f37d45e6aa60baacfc3329ccff4;p=notmuch

diff --git a/util/zlib-extra.h b/util/zlib-extra.h
index aedfd48f..296dc914 100644
--- a/util/zlib-extra.h
+++ b/util/zlib-extra.h
@@ -4,6 +4,10 @@
 #include "util.h"
 #include <zlib.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Like getline, but read from a gzFile. Allocation is with talloc.
  * Returns:
  *
@@ -22,4 +26,14 @@ gz_getline (void *ctx, char **lineptr, ssize_t *bytes_read, gzFile stream);
 
 const char *
 gz_error_string (util_status_t status, gzFile stream);
+
+/* Call gzerror with a dummy errno argument, the docs don't promise to
+ * support the NULL case */
+inline const char *
+gzerror_str(gzFile file) { int dummy; return gzerror (file, &dummy); }
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif