From f56a3ce0343d9f539f638b88445aefb256afbfb5 Mon Sep 17 00:00:00 2001
From: Amul Sul <sulamul@gmail.com>
Date: Tue, 24 Jun 2025 11:33:20 +0530
Subject: [PATCH v6 1/8] Refactor: pg_waldump: Move some declarations to new
 pg_waldump.h

This change prepares for a second source file in this directory to
support reading WAL from tar files. Common structures, declarations,
and functions are being exported through this include file so
they can be used in both files.
---
 src/bin/pg_waldump/pg_waldump.c | 11 ++---------
 src/bin/pg_waldump/pg_waldump.h | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 9 deletions(-)
 create mode 100644 src/bin/pg_waldump/pg_waldump.h

diff --git a/src/bin/pg_waldump/pg_waldump.c b/src/bin/pg_waldump/pg_waldump.c
index c6d6ba79e44..5846ee24f46 100644
--- a/src/bin/pg_waldump/pg_waldump.c
+++ b/src/bin/pg_waldump/pg_waldump.c
@@ -29,6 +29,7 @@
 #include "common/logging.h"
 #include "common/relpath.h"
 #include "getopt_long.h"
+#include "pg_waldump.h"
 #include "rmgrdesc.h"
 #include "storage/bufpage.h"
 
@@ -39,19 +40,11 @@
 
 static const char *progname;
 
-static int	WalSegSz;
+int			WalSegSz = DEFAULT_XLOG_SEG_SIZE;
 static volatile sig_atomic_t time_to_stop = false;
 
 static const RelFileLocator emptyRelFileLocator = {0, 0, 0};
 
-typedef struct XLogDumpPrivate
-{
-	TimeLineID	timeline;
-	XLogRecPtr	startptr;
-	XLogRecPtr	endptr;
-	bool		endptr_reached;
-} XLogDumpPrivate;
-
 typedef struct XLogDumpConfig
 {
 	/* display options */
diff --git a/src/bin/pg_waldump/pg_waldump.h b/src/bin/pg_waldump/pg_waldump.h
new file mode 100644
index 00000000000..9e62b64ead5
--- /dev/null
+++ b/src/bin/pg_waldump/pg_waldump.h
@@ -0,0 +1,27 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_waldump.h - decode and display WAL
+ *
+ * Copyright (c) 2013-2025, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *		  src/bin/pg_waldump/pg_waldump.h
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_WALDUMP_H
+#define PG_WALDUMP_H
+
+#include "access/xlogdefs.h"
+
+extern int	WalSegSz;
+
+/* Contains the necessary information to drive WAL decoding */
+typedef struct XLogDumpPrivate
+{
+	TimeLineID	timeline;
+	XLogRecPtr	startptr;
+	XLogRecPtr	endptr;
+	bool		endptr_reached;
+} XLogDumpPrivate;
+
+#endif		/* end of PG_WALDUMP_H */
-- 
2.47.1