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author Peter Eisentraut <peter@eisentraut.org>

2025年3月28日 13:05:45 +0000 (14:05 +0100)

committer Peter Eisentraut <peter@eisentraut.org>

2025年3月28日 13:34:57 +0000 (14:34 +0100)

Without the cast, the return type could be long or long long,
depending on what int64 is underneath. This doesn't affect code
correctness, but it could result in format-mismatch warnings when
attempting to printf such values using PRId64.

Reported-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CA+hUKGJc4s+Wyb3EFOQNN9VVK+Qv40r2LK41o9PkS9ThxviTvQ@mail.gmail.com

src/include/c.h patch | blob | blame | history

diff --git a/src/include/c.h b/src/include/c.h

index 72a3fd10b416dcebfdacd071075a7b8317621f92..8cdc16a0f4a9b4d2a8638981a9e574405846cd3a 100644 (file)

--- a/src/include/c.h

+++ b/src/include/c.h

@@ -1278,9 +1278,9 @@ extern int fdatasync(int fildes);

* Similarly, wrappers around labs()/llabs() matching our int64.

#if SIZEOF_LONG == 8

-#define i64abs(i) labs(i)

+#define i64abs(i) ((int64) labs(i))

#elif SIZEOF_LONG_LONG == 8

-#define i64abs(i) llabs(i)

+#define i64abs(i) ((int64) llabs(i))

#else

#error "cannot find integer type of the same size as int64_t"

#endif

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