1 files changed, 44 insertions, 0 deletions
diff --git a/src/include/common/backup_compression.h b/src/include/common/backup_compression.h
new file mode 100644
index 00000000000..0565cbc657d
--- /dev/null
+++ b/src/include/common/backup_compression.h
@@ -0,0 +1,44 @@
+/*-------------------------------------------------------------------------
+ *
+ * backup_compression.h
+ *
+ * Shared definitions for backup compression methods and specifications.
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *		  src/common/backup_compression.h
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef BACKUP_COMPRESSION_H
+#define BACKUP_COMPRESSION_H
+
+typedef enum bc_algorithm
+{
+	BACKUP_COMPRESSION_NONE,
+	BACKUP_COMPRESSION_GZIP,
+	BACKUP_COMPRESSION_LZ4,
+	BACKUP_COMPRESSION_ZSTD
+} bc_algorithm;
+
+#define	BACKUP_COMPRESSION_OPTION_LEVEL			(1 << 0)
+
+typedef struct bc_specification
+{
+	bc_algorithm algorithm;
+	unsigned	options;		/* OR of BACKUP_COMPRESSION_OPTION constants */
+	int			level;
+	char	   *parse_error;	/* NULL if parsing was OK, else message */
+} bc_specification;
+
+extern bool parse_bc_algorithm(char *name, bc_algorithm *algorithm);
+extern const char *get_bc_algorithm_name(bc_algorithm algorithm);
+
+extern void parse_bc_specification(bc_algorithm algorithm,
+								   char *specification,
+								   bc_specification *result);
+
+extern char *validate_bc_specification(bc_specification *);
+
+#endif