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-rw-r--r--src/lib-compression/iostream-zstd-private.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/src/lib-compression/iostream-zstd-private.h b/src/lib-compression/iostream-zstd-private.h
new file mode 100644
index 0000000..e430bbc
--- /dev/null
+++ b/src/lib-compression/iostream-zstd-private.h
@@ -0,0 +1,35 @@
+#ifndef IOSTREAM_ZSTD_PRIVATE_H
+#define IOSTREAM_ZSTD_PRIVATE_H 1
+
+/* a horrible hack to fix issues when the installed libzstd is lot
+ newer than what we were compiled against. */
+static inline ZSTD_ErrorCode zstd_version_errcode(ZSTD_ErrorCode err)
+{
+#if ZSTD_VERSION_NUMBER < 10301
+ if (ZSTD_versionNumber() > 10300) {
+ /* reinterpret them */
+ if (err == 10)
+ return ZSTD_error_prefix_unknown;
+ if (err == 32)
+ return ZSTD_error_dictionary_wrong;
+ if (err == 62)
+ return ZSTD_error_init_missing;
+ if (err == 64)
+ return ZSTD_error_memory_allocation;
+ return ZSTD_error_GENERIC;
+ }
+#endif
+ return err;
+}
+
+static inline void zstd_version_check(void)
+{
+ /* error codes were pinned on 1.3.1, so we only care about
+ versions before that. */
+ if (ZSTD_VERSION_NUMBER < 10301 || ZSTD_versionNumber() < 10301)
+ if (ZSTD_versionNumber() / 100 != ZSTD_VERSION_NUMBER / 100)
+ i_warning("zstd: Compiled against %u, but %u installed!",
+ ZSTD_VERSION_NUMBER, ZSTD_versionNumber());
+}
+
+#endif