From 15c34be96178afe9189edfa7970a789704919a2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EC=B5=9C=ED=98=84=EC=88=98?= <assam258@gmail.com>
Date: Tue, 23 Jan 2024 15:56:01 +0900
Subject: [PATCH] Supports PostgreSQL 9.4 and later versions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The return value data type of function “appendStringInfoVA” has changed.
Before PostgreSQL 9.4, returns true on success, or false as bool type on failure.
Since PostgreSQL 9.4, returns 0 on success, and returns the required memory size as an integer on failure.
---
 src/pg_journal.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/pg_journal.c b/src/pg_journal.c
index cb07910..de563e9 100644
--- a/src/pg_journal.c
+++ b/src/pg_journal.c
@@ -230,16 +230,29 @@ append_fmt(StringInfo str, struct iovec *field, const char *fmt, ...)
 {
 	size_t old_len = str->len;
 	va_list args;
+#if PG_VERSION_NUM >= 90400
+	int needed;
+#else
 	bool success;
+#endif
 
 	/* appendStringInfoVA can fail due to insufficient space */
 	while (1) {
 		va_start(args, fmt);
+#if PG_VERSION_NUM >= 90400
+		needed = appendStringInfoVA(str, fmt, args);
+#else
 		success = appendStringInfoVA(str, fmt, args);
+#endif
 		va_end(args);
 
+#if PG_VERSION_NUM >= 90400
+		if (needed == 0)
+			break;
+#else
 		if (success)
 			break;
+#endif
 
 		/* Double the buffer size and try again. */
 		enlargeStringInfo(str, str->maxlen);