From d259e194df12569c8fe286eacd285be28118ecd7 Mon Sep 17 00:00:00 2001
From: CoprDistGit <infra@openeuler.org>
Date: Sat, 7 Nov 2026 06:22:11 +0000
Subject: automatic import of zlib

---
 ...p-Fix-being-unable-to-open-empty-zip-file.patch | 160 +++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 backport-minizip-Fix-being-unable-to-open-empty-zip-file.patch

(limited to 'backport-minizip-Fix-being-unable-to-open-empty-zip-file.patch')

diff --git a/backport-minizip-Fix-being-unable-to-open-empty-zip-file.patch b/backport-minizip-Fix-being-unable-to-open-empty-zip-file.patch
new file mode 100644
index 0000000..f574468
--- /dev/null
+++ b/backport-minizip-Fix-being-unable-to-open-empty-zip-file.patch
@@ -0,0 +1,160 @@
+From f209ca7be7981dc8fca79428706057e4ebc929ee Mon Sep 17 00:00:00 2001
+From: RedworkDE <10944644+RedworkDE@users.noreply.github.com>
+Date: Wed, 15 Feb 2023 12:25:33 +0100
+Subject: [PATCH] minizip: Fix being unable to open empty zip file
+
+Reference:https://github.com/madler/zlib/commit/f209ca7be7981dc8fca79428706057e4ebc929ee
+Conflict:NA
+---
+ contrib/minizip/unzip.c | 48 ++++++++++++++++++++++-------------------
+ 1 file changed, 26 insertions(+), 22 deletions(-)
+
+diff --git a/contrib/minizip/unzip.c b/contrib/minizip/unzip.c
+index ad2eb3bc9..3adc692f3 100644
+--- a/contrib/minizip/unzip.c
++++ b/contrib/minizip/unzip.c
+@@ -379,6 +379,10 @@ extern int ZEXPORT unzStringFileNameCompare (const char*  fileName1,
+ #define BUFREADCOMMENT (0x400)
+ #endif
+ 
++#ifndef CENTRALDIRINVALID
++#define CENTRALDIRINVALID ((ZPOS64_T)(-1))
++#endif
++
+ /*
+   Locate the Central directory of a zipfile (at the end, just before
+     the global comment)
+@@ -388,10 +392,10 @@ local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_f
+     ZPOS64_T uSizeFile;
+     ZPOS64_T uBackRead;
+     ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
+-    ZPOS64_T uPosFound=0;
++    ZPOS64_T uPosFound=CENTRALDIRINVALID;
+ 
+     if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+ 
+     uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
+@@ -401,7 +405,7 @@ local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_f
+ 
+     buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
+     if (buf==NULL)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     uBackRead = 4;
+     while (uBackRead<uMaxBack)
+@@ -431,7 +435,7 @@ local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_f
+                 break;
+             }
+ 
+-        if (uPosFound!=0)
++        if (uPosFound!=CENTRALDIRINVALID)
+             break;
+     }
+     TRYFREE(buf);
+@@ -449,12 +453,12 @@ local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
+     ZPOS64_T uSizeFile;
+     ZPOS64_T uBackRead;
+     ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
+-    ZPOS64_T uPosFound=0;
++    ZPOS64_T uPosFound=CENTRALDIRINVALID;
+     uLong uL;
+                 ZPOS64_T relativeOffset;
+ 
+     if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+ 
+     uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
+@@ -464,7 +468,7 @@ local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
+ 
+     buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
+     if (buf==NULL)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     uBackRead = 4;
+     while (uBackRead<uMaxBack)
+@@ -494,47 +498,47 @@ local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
+                 break;
+             }
+ 
+-        if (uPosFound!=0)
++        if (uPosFound!=CENTRALDIRINVALID)
+             break;
+     }
+     TRYFREE(buf);
+-    if (uPosFound == 0)
+-        return 0;
++    if (uPosFound == CENTRALDIRINVALID)
++        return CENTRALDIRINVALID;
+ 
+     /* Zip64 end of central directory locator */
+     if (ZSEEK64(*pzlib_filefunc_def,filestream, uPosFound,ZLIB_FILEFUNC_SEEK_SET)!=0)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     /* the signature, already checked */
+     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     /* number of the disk with the start of the zip64 end of  central directory */
+     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
+-        return 0;
++        return CENTRALDIRINVALID;
+     if (uL != 0)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     /* relative offset of the zip64 end of central directory record */
+     if (unz64local_getLong64(pzlib_filefunc_def,filestream,&relativeOffset)!=UNZ_OK)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     /* total number of disks */
+     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
+-        return 0;
++        return CENTRALDIRINVALID;
+     if (uL != 1)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     /* Goto end of central directory record */
+     if (ZSEEK64(*pzlib_filefunc_def,filestream, relativeOffset,ZLIB_FILEFUNC_SEEK_SET)!=0)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+      /* the signature */
+     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     if (uL != 0x06064b50)
+-        return 0;
++        return CENTRALDIRINVALID;
+ 
+     return relativeOffset;
+ }
+@@ -587,7 +591,7 @@ local unzFile unzOpenInternal(const void *path,
+         return NULL;
+ 
+     central_pos = unz64local_SearchCentralDir64(&us.z_filefunc,us.filestream);
+-    if (central_pos)
++    if (central_pos!=CENTRALDIRINVALID)
+     {
+         uLong uS;
+         ZPOS64_T uL64;
+@@ -649,7 +653,7 @@ local unzFile unzOpenInternal(const void *path,
+     else
+     {
+         central_pos = unz64local_SearchCentralDir(&us.z_filefunc,us.filestream);
+-        if (central_pos==0)
++        if (central_pos==CENTRALDIRINVALID)
+             err=UNZ_ERRNO;
+ 
+         us.isZip64 = 0;
-- 
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