xref: /third_party/libxml2/backport-xzlib-Fix-implicit-sign-change-in-xz_open.patch

From 1a6a9d6878ed00265941939adc468a517cd5ef36 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Tue, 14 Mar 2023 14:19:03 +0100
Subject: [PATCH] xzlib: Fix implicit sign change in xz_open


Reference:https://github.com/GNOME/libxml2/commit/1a6a9d6878ed00265941939adc468a517cd5ef36
Conflict:NA

---
 xzlib.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/xzlib.c b/xzlib.c
index 9a34738..8d75590 100644
--- a/xzlib.c
+++ b/xzlib.c
@@ -139,6 +139,7 @@ static xzFile
 xz_open(const char *path, int fd, const char *mode ATTRIBUTE_UNUSED)
 {
     xz_statep state;
+    off_t offset;
 
     /* allocate xzFile structure to return */
     state = xmlMalloc(sizeof(xz_state));
@@ -173,9 +174,11 @@ xz_open(const char *path, int fd, const char *mode ATTRIBUTE_UNUSED)
     }
 
     /* save the current position for rewinding (only if reading) */
-    state->start = lseek(state->fd, 0, SEEK_CUR);
-    if (state->start == (uint64_t) - 1)
+    offset = lseek(state->fd, 0, SEEK_CUR);
+    if (offset == -1)
         state->start = 0;
+    else
+        state->start = offset;
 
     /* initialize stream */
     xz_reset(state);
-- 
2.27.0