zlib/minizip: Update to version 1.2.12

Security update, fixes CVE-2018-25032 in zlib.

Preliminary assessment doesn't show Godot as affected since we don't
seem to call `deflate` with the problematic parameters, but the extent
of the vulnerability is not fully clear upstream yet.

thirdparty/README.md

@@ -383,17 +383,17 @@ that file when upgrading.
 
 ## minizip
 
-- Upstream: http://www.zlib.net
+- Upstream: https://www.zlib.net
-- Version: 1.2.11 (zlib contrib, 2017)
+- Version: 1.2.12 (zlib contrib, 2022)
 - License: zlib
 
 Files extracted from the upstream source:
 
-- contrib/minizip/{crypt.h,ioapi.{c,h},zip.{c,h},unzip.{c,h}}
+- contrib/minizip/{crypt.h,ioapi.{c,h},unzip.{c,h},zip.{c,h}}
 
 Important: Some files have Godot-made changes for use in core/io.
 They are marked with `/* GODOT start */` and `/* GODOT end */`
-comments and a patch is provided in the minizip/ folder.
+comments and a patch is provided in the `patches` folder.
 
 
 ## misc
@@ -725,8 +725,8 @@ Files extracted from upstream source:
 
 ## zlib
 
-- Upstream: http://www.zlib.net
+- Upstream: https://www.zlib.net
-- Version: 1.2.11 (2017)
+- Version: 1.2.12 (2022)
 - License: zlib
 
 Files extracted from upstream source:

thirdparty/minizip/crypt.h

@@ -38,6 +38,7 @@ static int decrypt_byte(unsigned long* pkeys, const z_crc_t* pcrc_32_tab)
                      * unpredictable manner on 16-bit systems; not a problem
                      * with any known compiler so far, though */
 
+    (void)pcrc_32_tab;
     temp = ((unsigned)(*(pkeys+2)) & 0xffff) | 2;
     return (int)(((temp * (temp ^ 1)) >> 8) & 0xff);
 }
@@ -77,24 +78,24 @@ static void init_keys(const char* passwd,unsigned long* pkeys,const z_crc_t* pcr
     (update_keys(pkeys,pcrc_32_tab,c ^= decrypt_byte(pkeys,pcrc_32_tab)))
 
 #define zencode(pkeys,pcrc_32_tab,c,t) \
-    (t=decrypt_byte(pkeys,pcrc_32_tab), update_keys(pkeys,pcrc_32_tab,c), t^(c))
+    (t=decrypt_byte(pkeys,pcrc_32_tab), update_keys(pkeys,pcrc_32_tab,c), (Byte)t^(c))
 
 #ifdef INCLUDECRYPTINGCODE_IFCRYPTALLOWED
 
 #define RAND_HEAD_LEN  12
    /* "last resort" source for second part of crypt seed pattern */
 #  ifndef ZCR_SEED2
-#    define ZCR_SEED2 3141592654UL     /* use PI as default pattern */
+#    define ZCR_SEED2 3141592654L       /* use PI as default pattern */
 #  endif
 
-static int crypthead(const char* passwd,      /* password string */
+static unsigned crypthead(const char* passwd,       /* password string */
                           unsigned char* buf,       /* where to write header */
                           int bufSize,
                           unsigned long* pkeys,
                           const z_crc_t* pcrc_32_tab,
                           unsigned long crcForCrypting)
 {
-    int n;                       /* index in random header */
+    unsigned n;                  /* index in random header */
     int t;                       /* temporary */
     int c;                       /* random byte */
     unsigned char header[RAND_HEAD_LEN-2]; /* random header */

thirdparty/minizip/ioapi.c

@@ -58,7 +58,7 @@ ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream
         return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
     else
     {
-        uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
+        uLong tell_uLong = (uLong)(*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
         if ((tell_uLong) == MAXU32)
             return (ZPOS64_T)-1;
         else
@@ -101,6 +101,7 @@ static int     ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
 
 static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
 {
+    (void)opaque;
     FILE* file = NULL;
     const char* mode_fopen = NULL;
     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
@@ -119,6 +120,7 @@ static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, in
 
 static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
 {
+    (void)opaque;
     FILE* file = NULL;
     const char* mode_fopen = NULL;
     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
@@ -138,6 +140,7 @@ static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename,
 
 static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
 {
+    (void)opaque;
     uLong ret;
     ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
     return ret;
@@ -145,6 +148,7 @@ static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf,
 
 static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
 {
+    (void)opaque;
     uLong ret;
     ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
     return ret;
@@ -152,6 +156,7 @@ static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const voi
 
 static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
     long ret;
     ret = ftell((FILE *)stream);
     return ret;
@@ -160,13 +165,15 @@ static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
 
 static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
     ZPOS64_T ret;
-    ret = FTELLO_FUNC((FILE *)stream);
+    ret = (ZPOS64_T)FTELLO_FUNC((FILE *)stream);
     return ret;
 }
 
 static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offset, int origin)
 {
+    (void)opaque;
     int fseek_origin=0;
     long ret;
     switch (origin)
@@ -183,13 +190,14 @@ static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offs
     default: return -1;
     }
     ret = 0;
-    if (fseek((FILE *)stream, offset, fseek_origin) != 0)
+    if (fseek((FILE *)stream, (long)offset, fseek_origin) != 0)
         ret = -1;
     return ret;
 }
 
 static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
 {
+    (void)opaque;
     int fseek_origin=0;
     long ret;
     switch (origin)
@@ -207,7 +215,7 @@ static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T
     }
     ret = 0;
 
-    if(FSEEKO_FUNC((FILE *)stream, offset, fseek_origin) != 0)
+    if(FSEEKO_FUNC((FILE *)stream, (long)offset, fseek_origin) != 0)
                         ret = -1;
 
     return ret;
@@ -216,6 +224,7 @@ static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T
 
 static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
     int ret;
     ret = fclose((FILE *)stream);
     return ret;
@@ -223,6 +232,7 @@ static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
 
 static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
     int ret;
     ret = ferror((FILE *)stream);
     return ret;

thirdparty/minizip/ioapi.h

@@ -107,8 +107,7 @@ typedef  64BIT_INT_CUSTOM_TYPE ZPOS64_T;
 typedef uint64_t ZPOS64_T;
 #else
 
-/* Maximum unsigned 32-bit value used as placeholder for zip64 */
+
-#define MAXU32 0xffffffff
 
 #if defined(_MSC_VER) || defined(__BORLANDC__)
 typedef unsigned __int64 ZPOS64_T;
@@ -118,7 +117,10 @@ typedef unsigned long long int ZPOS64_T;
 #endif
 #endif
 
-
+/* Maximum unsigned 32-bit value used as placeholder for zip64 */
+#ifndef MAXU32
+#define MAXU32 (0xffffffff)
+#endif
 
 #ifdef __cplusplus
 extern "C" {

thirdparty/minizip/patches/godot-seek.patch

@@ -1,8 +1,8 @@
 diff --git a/thirdparty/minizip/ioapi.c b/thirdparty/minizip/ioapi.c
-index 49958f61f..0afbdc06a 100644
+index d666e5a228..db4c33b4b9 100644
 --- a/thirdparty/minizip/ioapi.c
 +++ b/thirdparty/minizip/ioapi.c
-@@ -68,8 +68,15 @@ void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filef
+@@ -80,8 +80,15 @@ void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filef
      p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
      p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
      p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
@@ -18,7 +18,7 @@ index 49958f61f..0afbdc06a 100644
  
  
  static voidpf  ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
-@@ -233,3 +240,6 @@ void fill_fopen64_filefunc (zlib_filefunc64_def*  pzlib_filefunc_def)
+@@ -255,3 +262,6 @@ void fill_fopen64_filefunc (zlib_filefunc64_def*  pzlib_filefunc_def)
      pzlib_filefunc_def->zerror_file = ferror_file_func;
      pzlib_filefunc_def->opaque = NULL;
  }
@@ -26,10 +26,10 @@ index 49958f61f..0afbdc06a 100644
 +*/
 +/* GODOT end */
 diff --git a/thirdparty/minizip/ioapi.h b/thirdparty/minizip/ioapi.h
-index 8309c4cf8..f25ab6464 100644
+index 114bfab762..2f24a5b6a0 100644
 --- a/thirdparty/minizip/ioapi.h
 +++ b/thirdparty/minizip/ioapi.h
-@@ -145,6 +145,10 @@ typedef struct zlib_filefunc_def_s
+@@ -155,6 +155,10 @@ typedef struct zlib_filefunc_def_s
      close_file_func     zclose_file;
      testerror_file_func zerror_file;
      voidpf              opaque;
@@ -40,7 +40,7 @@ index 8309c4cf8..f25ab6464 100644
  } zlib_filefunc_def;
  
  typedef ZPOS64_T (ZCALLBACK *tell64_file_func)    OF((voidpf opaque, voidpf stream));
-@@ -161,6 +165,10 @@ typedef struct zlib_filefunc64_def_s
+@@ -171,6 +175,10 @@ typedef struct zlib_filefunc64_def_s
      close_file_func     zclose_file;
      testerror_file_func zerror_file;
      voidpf              opaque;
@@ -52,7 +52,7 @@ index 8309c4cf8..f25ab6464 100644
  
  void fill_fopen64_filefunc OF((zlib_filefunc64_def* pzlib_filefunc_def));
 diff --git a/thirdparty/minizip/unzip.c b/thirdparty/minizip/unzip.c
-index 7617f41f1..32e27bd65 100644
+index 5e12e47474..3b191e827c 100644
 --- a/thirdparty/minizip/unzip.c
 +++ b/thirdparty/minizip/unzip.c
 @@ -157,6 +157,9 @@ typedef struct
@@ -98,32 +98,31 @@ index 7617f41f1..32e27bd65 100644
  /*
    Close a ZipFile opened with unzOpen.
    If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
-@@ -1018,10 +1034,20 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,
+@@ -1018,10 +1034,23 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,
  
          if (lSeek!=0)
          {
--            if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
--                lSeek=0;
--            else
--                err=UNZ_ERRNO;
 +            /* GODOT start */
 +            if (lSeek<0) {
 +                // WORKAROUND for backwards seeking
-+                z_off_t pos = ZTELL64(s->z_filefunc, s->filestream);
++                ZPOS64_T pos = ZTELL64(s->z_filefunc, s->filestream);
-+                if (ZSEEK64(s->z_filefunc, s->filestream,pos+lSeek,ZLIB_FILEFUNC_SEEK_SET)==0)
++                if (ZSEEK64(s->z_filefunc, s->filestream,pos+(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_SET)==0)
 +                    lSeek=0;
 +                else
 +                    err=UNZ_ERRNO;
 +            } else {
-+                if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
++            /* GODOT end */
-+                    lSeek=0;
+             if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
-+                else
+                 lSeek=0;
-+                    err=UNZ_ERRNO;
+             else
+                 err=UNZ_ERRNO;
++            /* GODOT start */
 +            }
++            /* GODOT end */
          }
  
          while(acc < file_info.size_file_extra)
-@@ -1575,8 +1601,10 @@ extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
+@@ -1575,8 +1604,10 @@ extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
      }
      else if ((s->cur_file_info.compression_method==Z_DEFLATED) && (!raw))
      {
@@ -136,7 +135,7 @@ index 7617f41f1..32e27bd65 100644
        pfile_in_zip_read_info->stream.opaque = (voidpf)0;
        pfile_in_zip_read_info->stream.next_in = 0;
        pfile_in_zip_read_info->stream.avail_in = 0;
-@@ -1608,6 +1636,9 @@ extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
+@@ -1608,6 +1639,9 @@ extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
                iSizeVar;
  
      pfile_in_zip_read_info->stream.avail_in = (uInt)0;
@@ -146,7 +145,7 @@ index 7617f41f1..32e27bd65 100644
  
      s->pfile_in_zip_read = pfile_in_zip_read_info;
                  s->encrypted = 0;
-@@ -1638,6 +1669,85 @@ extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
+@@ -1638,6 +1672,85 @@ extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
      return UNZ_OK;
  }
  
@@ -165,7 +164,7 @@ index 7617f41f1..32e27bd65 100644
 +
 +    if (pfile_in_zip_read_info->compression_method==Z_BZIP2ED) { // don't know how to support bzip
 +        return UNZ_INTERNALERROR;
-+    };
++    }
 +
 +    if ((pfile_in_zip_read_info->compression_method==0) || (pfile_in_zip_read_info->raw)) {
 +
@@ -204,7 +203,7 @@ index 7617f41f1..32e27bd65 100644
 +            pfile_in_zip_read_info->stream.avail_in = (uInt)0;
 +            pfile_in_zip_read_info->stream.total_out = 0;
 +            pfile_in_zip_read_info->stream.next_in = 0;
-+        };
++        }
 +
 +        // not sure where to read, so read on the stack
 +        {
@@ -216,24 +215,24 @@ index 7617f41f1..32e27bd65 100644
 +                int read = unzReadCurrentFile(file, buf, len);
 +                if (read < 0) {
 +                    return read;
-+                };
++                }
 +                to_read -= read;
 +                if (read == UNZ_EOF) {
 +                    return pos;
-+                };
++                }
-+            };
++            }
-+        };
++        }
-+    };
++    }
 +
 +    return pos;
-+};
++}
 +/* GODOT end */
 +
  extern int ZEXPORT unzOpenCurrentFile (unzFile file)
  {
      return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL);
 diff --git a/thirdparty/minizip/unzip.h b/thirdparty/minizip/unzip.h
-index 3183968b7..54e65ad8a 100644
+index 6f95e94d75..71a7d89692 100644
 --- a/thirdparty/minizip/unzip.h
 +++ b/thirdparty/minizip/unzip.h
 @@ -202,6 +202,10 @@ extern int ZEXPORT unzClose OF((unzFile file));
@@ -262,7 +261,7 @@ index 3183968b7..54e65ad8a 100644
  
  extern ZPOS64_T ZEXPORT unztell64 OF((unzFile file));
 diff --git a/thirdparty/minizip/zip.c b/thirdparty/minizip/zip.c
-index 3c34fc8bd..d7093e745 100644
+index 4e611e1163..6d1c26d9f8 100644
 --- a/thirdparty/minizip/zip.c
 +++ b/thirdparty/minizip/zip.c
 @@ -854,9 +854,11 @@ extern zipFile ZEXPORT zipOpen3 (const void *pathname, int append, zipcharpc* gl
@@ -280,7 +279,7 @@ index 3c34fc8bd..d7093e745 100644
          ziinit.z_filefunc = *pzlib_filefunc64_32_def;
  
      ziinit.filestream = ZOPEN64(ziinit.z_filefunc,
-@@ -1210,8 +1212,10 @@ extern int ZEXPORT zipOpenNewFileInZip4_64 (zipFile file, const char* filename,
+@@ -1211,8 +1213,10 @@ extern int ZEXPORT zipOpenNewFileInZip4_64 (zipFile file, const char* filename,
      {
          if(zi->ci.method == Z_DEFLATED)
          {

thirdparty/minizip/unzip.c

@@ -458,7 +458,7 @@ local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_f
             if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
                 ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
             {
-                uPosFound = uReadPos+i;
+                uPosFound = uReadPos+(unsigned)i;
                 break;
             }
 
@@ -526,7 +526,7 @@ local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
             if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
                 ((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
             {
-                uPosFound = uReadPos+i;
+                uPosFound = uReadPos+(unsigned)i;
                 break;
             }
 
@@ -869,13 +869,13 @@ local void unz64local_DosDateToTmuDate (ZPOS64_T ulDosDate, tm_unz* ptm)
 {
     ZPOS64_T uDate;
     uDate = (ZPOS64_T)(ulDosDate>>16);
-    ptm->tm_mday = (uInt)(uDate&0x1f) ;
+    ptm->tm_mday = (int)(uDate&0x1f) ;
-    ptm->tm_mon =  (uInt)((((uDate)&0x1E0)/0x20)-1) ;
+    ptm->tm_mon =  (int)((((uDate)&0x1E0)/0x20)-1) ;
-    ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
+    ptm->tm_year = (int)(((uDate&0x0FE00)/0x0200)+1980) ;
 
-    ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
+    ptm->tm_hour = (int) ((ulDosDate &0xF800)/0x800);
-    ptm->tm_min =  (uInt) ((ulDosDate&0x7E0)/0x20) ;
+    ptm->tm_min =  (int) ((ulDosDate&0x7E0)/0x20) ;
-    ptm->tm_sec =  (uInt) (2*(ulDosDate&0x1f)) ;
+    ptm->tm_sec =  (int) (2*(ulDosDate&0x1f)) ;
 }
 
 /*
@@ -1009,7 +1009,7 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,
 
         if (lSeek!=0)
         {
-            if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+            if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
                 lSeek=0;
             else
                 err=UNZ_ERRNO;
@@ -1037,17 +1037,20 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,
             /* GODOT start */
             if (lSeek<0) {
                 // WORKAROUND for backwards seeking
-                z_off_t pos = ZTELL64(s->z_filefunc, s->filestream);
+                ZPOS64_T pos = ZTELL64(s->z_filefunc, s->filestream);
-                if (ZSEEK64(s->z_filefunc, s->filestream,pos+lSeek,ZLIB_FILEFUNC_SEEK_SET)==0)
+                if (ZSEEK64(s->z_filefunc, s->filestream,pos+(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_SET)==0)
                     lSeek=0;
                 else
                     err=UNZ_ERRNO;
             } else {
-                if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+            /* GODOT end */
+            if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
                 lSeek=0;
             else
                 err=UNZ_ERRNO;
+            /* GODOT start */
             }
+            /* GODOT end */
         }
 
         while(acc < file_info.size_file_extra)
@@ -1116,7 +1119,7 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,
 
         if (lSeek!=0)
         {
-            if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+            if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
                 lSeek=0;
             else
                 err=UNZ_ERRNO;
@@ -1684,7 +1687,7 @@ extern int ZEXPORT unzSeekCurrentFile(unzFile file, int pos) {
 
     if (pfile_in_zip_read_info->compression_method==Z_BZIP2ED) { // don't know how to support bzip
         return UNZ_INTERNALERROR;
-    };
+    }
 
     if ((pfile_in_zip_read_info->compression_method==0) || (pfile_in_zip_read_info->raw)) {
 
@@ -1723,7 +1726,7 @@ extern int ZEXPORT unzSeekCurrentFile(unzFile file, int pos) {
             pfile_in_zip_read_info->stream.avail_in = (uInt)0;
             pfile_in_zip_read_info->stream.total_out = 0;
             pfile_in_zip_read_info->stream.next_in = 0;
-        };
+        }
 
         // not sure where to read, so read on the stack
         {
@@ -1735,17 +1738,17 @@ extern int ZEXPORT unzSeekCurrentFile(unzFile file, int pos) {
                 int read = unzReadCurrentFile(file, buf, len);
                 if (read < 0) {
                     return read;
-                };
+                }
                 to_read -= read;
                 if (read == UNZ_EOF) {
                     return pos;
-                };
+                }
-            };
+            }
-        };
+        }
-    };
+    }
 
     return pos;
-};
+}
 /* GODOT end */
 
 extern int ZEXPORT unzOpenCurrentFile (unzFile file)
@@ -1877,7 +1880,7 @@ extern int ZEXPORT unzReadCurrentFile  (unzFile file, voidp buf, unsigned len)
 
             if ((pfile_in_zip_read_info->stream.avail_in == 0) &&
                 (pfile_in_zip_read_info->rest_read_compressed == 0))
-                return (iRead==0) ? UNZ_EOF : iRead;
+                return (iRead==0) ? UNZ_EOF : (int)iRead;
 
             if (pfile_in_zip_read_info->stream.avail_out <
                             pfile_in_zip_read_info->stream.avail_in)
@@ -1967,6 +1970,9 @@ extern int ZEXPORT unzReadCurrentFile  (unzFile file, voidp buf, unsigned len)
               err = Z_DATA_ERROR;
 
             uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
+            /* Detect overflow, because z_stream.total_out is uLong (32 bits) */
+            if (uTotalOutAfter<uTotalOutBefore)
+                uTotalOutAfter += 1LL << 32; /* Add maximum value of uLong + 1 */
             uOutThis = uTotalOutAfter-uTotalOutBefore;
 
             pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
@@ -1981,14 +1987,14 @@ extern int ZEXPORT unzReadCurrentFile  (unzFile file, voidp buf, unsigned len)
             iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
 
             if (err==Z_STREAM_END)
-                return (iRead==0) ? UNZ_EOF : iRead;
+                return (iRead==0) ? UNZ_EOF : (int)iRead;
             if (err!=Z_OK)
                 break;
         }
     }
 
     if (err==Z_OK)
-        return iRead;
+        return (int)iRead;
     return err;
 }
 

thirdparty/minizip/unzip.h

@@ -83,12 +83,12 @@ typedef voidp unzFile;
 /* tm_unz contain date/time info */
 typedef struct tm_unz_s
 {
-    uInt tm_sec;            /* seconds after the minute - [0,59] */
+    int tm_sec;             /* seconds after the minute - [0,59] */
-    uInt tm_min;            /* minutes after the hour - [0,59] */
+    int tm_min;             /* minutes after the hour - [0,59] */
-    uInt tm_hour;           /* hours since midnight - [0,23] */
+    int tm_hour;            /* hours since midnight - [0,23] */
-    uInt tm_mday;           /* day of the month - [1,31] */
+    int tm_mday;            /* day of the month - [1,31] */
-    uInt tm_mon;            /* months since January - [0,11] */
+    int tm_mon;             /* months since January - [0,11] */
-    uInt tm_year;           /* years - [1980..2044] */
+    int tm_year;            /* years - [1980..2044] */
 } tm_unz;
 
 /* unz_global_info structure contain global data about the ZIPfile

thirdparty/minizip/zip.c

@@ -158,7 +158,7 @@ typedef struct
 #ifndef NOCRYPT
     unsigned long keys[3];     /* keys defining the pseudo-random sequence */
     const z_crc_t* pcrc_32_tab;
-    int crypt_header_size;
+    unsigned crypt_header_size;
 #endif
 } curfile64_info;
 
@@ -301,7 +301,7 @@ local int zip64local_putValue (const zlib_filefunc64_32_def* pzlib_filefunc_def,
         }
       }
 
-    if (ZWRITE64(*pzlib_filefunc_def,filestream,buf,nbByte)!=(uLong)nbByte)
+    if (ZWRITE64(*pzlib_filefunc_def,filestream,buf,(uLong)nbByte)!=(uLong)nbByte)
         return ZIP_ERRNO;
     else
         return ZIP_OK;
@@ -337,8 +337,8 @@ local uLong zip64local_TmzDateToDosDate(const tm_zip* ptm)
     else if (year>=80)
         year-=80;
     return
-      (uLong) (((ptm->tm_mday) + (32 * (ptm->tm_mon+1)) + (512 * year)) << 16) |
+      (uLong) (((uLong)(ptm->tm_mday) + (32 * (uLong)(ptm->tm_mon+1)) + (512 * year)) << 16) |
-        ((ptm->tm_sec/2) + (32* ptm->tm_min) + (2048 * (uLong)ptm->tm_hour));
+        (((uLong)ptm->tm_sec/2) + (32 * (uLong)ptm->tm_min) + (2048 * (uLong)ptm->tm_hour));
 }
 
 
@@ -522,7 +522,7 @@ local ZPOS64_T zip64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_f
       if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
         ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
       {
-        uPosFound = uReadPos+i;
+        uPosFound = uReadPos+(unsigned)i;
         break;
       }
 
@@ -586,7 +586,7 @@ local ZPOS64_T zip64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
       // Signature "0x07064b50" Zip64 end of central directory locater
       if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && ((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
       {
-        uPosFound = uReadPos+i;
+        uPosFound = uReadPos+(unsigned)i;
         break;
       }
     }
@@ -637,7 +637,7 @@ local ZPOS64_T zip64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
   return relativeOffset;
 }
 
-int LoadCentralDirectoryRecord(zip64_internal* pziinit)
+local int LoadCentralDirectoryRecord(zip64_internal* pziinit)
 {
   int err=ZIP_OK;
   ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
@@ -957,7 +957,7 @@ extern zipFile ZEXPORT zipOpen64 (const void* pathname, int append)
     return zipOpen3(pathname,append,NULL,NULL);
 }
 
-int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_extrafield_local, const void* extrafield_local)
+local int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_extrafield_local, const void* extrafield_local)
 {
   /* write the local header */
   int err;
@@ -1036,8 +1036,8 @@ int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_ex
       // Remember position of Zip64 extended info for the local file header. (needed when we update size after done with file)
       zi->ci.pos_zip64extrainfo = ZTELL64(zi->z_filefunc,zi->filestream);
 
-      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (short)HeaderID,2);
+      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)HeaderID,2);
-      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (short)DataSize,2);
+      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)DataSize,2);
 
       err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)UncompressedSize,8);
       err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)CompressedSize,8);
@@ -1520,7 +1520,7 @@ extern int ZEXPORT zipCloseFileInZipRaw64 (zipFile file, ZPOS64_T uncompressed_s
     zip64_internal* zi;
     ZPOS64_T compressed_size;
     uLong invalidValue = 0xffffffff;
-    short datasize = 0;
+    unsigned datasize = 0;
     int err=ZIP_OK;
 
     if (file == NULL)
@@ -1756,7 +1756,7 @@ extern int ZEXPORT zipCloseFileInZip (zipFile file)
     return zipCloseFileInZipRaw (file,0,0);
 }
 
-int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
+local int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
 {
   int err = ZIP_OK;
   ZPOS64_T pos = zip64eocd_pos_inzip - zi->add_position_when_writing_offset;
@@ -1778,7 +1778,7 @@ int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eo
     return err;
 }
 
-int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
+local int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
 {
   int err = ZIP_OK;
 
@@ -1817,7 +1817,7 @@ int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centra
   }
   return err;
 }
-int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
+local int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
 {
   int err = ZIP_OK;
 
@@ -1865,7 +1865,7 @@ int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir,
    return err;
 }
 
-int Write_GlobalComment(zip64_internal* zi, const char* global_comment)
+local int Write_GlobalComment(zip64_internal* zi, const char* global_comment)
 {
   int err = ZIP_OK;
   uInt size_global_comment = 0;
@@ -1966,7 +1966,7 @@ extern int ZEXPORT zipRemoveExtraInfoBlock (char* pData, int* dataLen, short sHe
   if(pData == NULL || *dataLen < 4)
     return ZIP_PARAMERROR;
 
-  pNewHeader = (char*)ALLOC(*dataLen);
+  pNewHeader = (char*)ALLOC((unsigned)*dataLen);
   pTmp = pNewHeader;
 
   while(p < (pData + *dataLen))

thirdparty/minizip/zip.h

@@ -88,12 +88,12 @@ typedef voidp zipFile;
 /* tm_zip contain date/time info */
 typedef struct tm_zip_s
 {
-    uInt tm_sec;            /* seconds after the minute - [0,59] */
+    int tm_sec;             /* seconds after the minute - [0,59] */
-    uInt tm_min;            /* minutes after the hour - [0,59] */
+    int tm_min;             /* minutes after the hour - [0,59] */
-    uInt tm_hour;           /* hours since midnight - [0,23] */
+    int tm_hour;            /* hours since midnight - [0,23] */
-    uInt tm_mday;           /* day of the month - [1,31] */
+    int tm_mday;            /* day of the month - [1,31] */
-    uInt tm_mon;            /* months since January - [0,11] */
+    int tm_mon;             /* months since January - [0,11] */
-    uInt tm_year;           /* years - [1980..2044] */
+    int tm_year;            /* years - [1980..2044] */
 } tm_zip;
 
 typedef struct
@@ -144,6 +144,11 @@ extern zipFile ZEXPORT zipOpen2_64 OF((const void *pathname,
                                    zipcharpc* globalcomment,
                                    zlib_filefunc64_def* pzlib_filefunc_def));
 
+extern zipFile ZEXPORT zipOpen3 OF((const void *pathname,
+                                    int append,
+                                    zipcharpc* globalcomment,
+                                    zlib_filefunc64_32_def* pzlib_filefunc64_32_def));
+
 extern int ZEXPORT zipOpenNewFileInZip OF((zipFile file,
                        const char* filename,
                        const zip_fileinfo* zipfi,

thirdparty/zlib/deflate.c

@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2022 Jean-loup Gailly and Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.2.11 Copyright 1995-2017 Jean-loup Gailly and Mark Adler ";
+   " deflate 1.2.12 Copyright 1995-2022 Jean-loup Gailly and Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -190,8 +190,11 @@ local const config configuration_table[10] = {
  * prev[] will be initialized on the fly.
  */
 #define CLEAR_HASH(s) \
+    do { \
         s->head[s->hash_size-1] = NIL; \
-    zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+        zmemzero((Bytef *)s->head, \
+                 (unsigned)(s->hash_size-1)*sizeof(*s->head)); \
+    } while (0)
 
 /* ===========================================================================
  * Slide the hash table when sliding the window down (could be avoided with 32
@@ -252,11 +255,6 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
     int wrap = 1;
     static const char my_version[] = ZLIB_VERSION;
 
-    ushf *overlay;
-    /* We overlay pending_buf and d_buf+l_buf. This works since the average
-     * output size for (length,distance) codes is <= 24 bits.
-     */
-
     if (version == Z_NULL || version[0] != my_version[0] ||
         stream_size != sizeof(z_stream)) {
         return Z_VERSION_ERROR;
@@ -326,9 +324,47 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 
     s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
 
-    overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
+    /* We overlay pending_buf and sym_buf. This works since the average size
-    s->pending_buf = (uchf *) overlay;
+     * for length/distance pairs over any compressed block is assured to be 31
-    s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
+     * bits or less.
+     *
+     * Analysis: The longest fixed codes are a length code of 8 bits plus 5
+     * extra bits, for lengths 131 to 257. The longest fixed distance codes are
+     * 5 bits plus 13 extra bits, for distances 16385 to 32768. The longest
+     * possible fixed-codes length/distance pair is then 31 bits total.
+     *
+     * sym_buf starts one-fourth of the way into pending_buf. So there are
+     * three bytes in sym_buf for every four bytes in pending_buf. Each symbol
+     * in sym_buf is three bytes -- two for the distance and one for the
+     * literal/length. As each symbol is consumed, the pointer to the next
+     * sym_buf value to read moves forward three bytes. From that symbol, up to
+     * 31 bits are written to pending_buf. The closest the written pending_buf
+     * bits gets to the next sym_buf symbol to read is just before the last
+     * code is written. At that time, 31*(n-2) bits have been written, just
+     * after 24*(n-2) bits have been consumed from sym_buf. sym_buf starts at
+     * 8*n bits into pending_buf. (Note that the symbol buffer fills when n-1
+     * symbols are written.) The closest the writing gets to what is unread is
+     * then n+14 bits. Here n is lit_bufsize, which is 16384 by default, and
+     * can range from 128 to 32768.
+     *
+     * Therefore, at a minimum, there are 142 bits of space between what is
+     * written and what is read in the overlain buffers, so the symbols cannot
+     * be overwritten by the compressed data. That space is actually 139 bits,
+     * due to the three-bit fixed-code block header.
+     *
+     * That covers the case where either Z_FIXED is specified, forcing fixed
+     * codes, or when the use of fixed codes is chosen, because that choice
+     * results in a smaller compressed block than dynamic codes. That latter
+     * condition then assures that the above analysis also covers all dynamic
+     * blocks. A dynamic-code block will only be chosen to be emitted if it has
+     * fewer bits than a fixed-code block would for the same set of symbols.
+     * Therefore its average symbol length is assured to be less than 31. So
+     * the compressed data for a dynamic block also cannot overwrite the
+     * symbols from which it is being constructed.
+     */
+
+    s->pending_buf = (uchf *) ZALLOC(strm, s->lit_bufsize, 4);
+    s->pending_buf_size = (ulg)s->lit_bufsize * 4;
 
     if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
         s->pending_buf == Z_NULL) {
@@ -337,8 +373,12 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
         deflateEnd (strm);
         return Z_MEM_ERROR;
     }
-    s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
+    s->sym_buf = s->pending_buf + s->lit_bufsize;
-    s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
+    s->sym_end = (s->lit_bufsize - 1) * 3;
+    /* We avoid equality with lit_bufsize*3 because of wraparound at 64K
+     * on 16 bit machines and because stored blocks are restricted to
+     * 64K-1 bytes.
+     */
 
     s->level = level;
     s->strategy = strategy;
@@ -488,13 +528,13 @@ int ZEXPORT deflateResetKeep (strm)
 #ifdef GZIP
         s->wrap == 2 ? GZIP_STATE :
 #endif
-        s->wrap ? INIT_STATE : BUSY_STATE;
+        INIT_STATE;
     strm->adler =
 #ifdef GZIP
         s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
 #endif
         adler32(0L, Z_NULL, 0);
-    s->last_flush = Z_NO_FLUSH;
+    s->last_flush = -2;
 
     _tr_init(s);
 
@@ -549,7 +589,8 @@ int ZEXPORT deflatePrime (strm, bits, value)
 
     if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
     s = strm->state;
-    if ((Bytef *)(s->d_buf) < s->pending_out + ((Buf_size + 7) >> 3))
+    if (bits < 0 || bits > 16 ||
+        s->sym_buf < s->pending_out + ((Buf_size + 7) >> 3))
         return Z_BUF_ERROR;
     do {
         put = Buf_size - s->bi_valid;
@@ -587,12 +628,12 @@ int ZEXPORT deflateParams(strm, level, strategy)
     func = configuration_table[s->level].func;
 
     if ((strategy != s->strategy || func != configuration_table[level].func) &&
-        s->high_water) {
+        s->last_flush != -2) {
         /* Flush the last buffer: */
         int err = deflate(strm, Z_BLOCK);
         if (err == Z_STREAM_ERROR)
             return err;
-        if (strm->avail_out == 0)
+        if (strm->avail_in || (s->strstart - s->block_start) + s->lookahead)
             return Z_BUF_ERROR;
     }
     if (s->level != level) {
@@ -811,6 +852,8 @@ int ZEXPORT deflate (strm, flush)
     }
 
     /* Write the header */
+    if (s->status == INIT_STATE && s->wrap == 0)
+        s->status = BUSY_STATE;
     if (s->status == INIT_STATE) {
         /* zlib header */
         uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
@@ -1108,7 +1151,6 @@ int ZEXPORT deflateCopy (dest, source)
 #else
     deflate_state *ds;
     deflate_state *ss;
-    ushf *overlay;
 
 
     if (deflateStateCheck(source) || dest == Z_NULL) {
@@ -1128,8 +1170,7 @@ int ZEXPORT deflateCopy (dest, source)
     ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
     ds->prev   = (Posf *)  ZALLOC(dest, ds->w_size, sizeof(Pos));
     ds->head   = (Posf *)  ZALLOC(dest, ds->hash_size, sizeof(Pos));
-    overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
+    ds->pending_buf = (uchf *) ZALLOC(dest, ds->lit_bufsize, 4);
-    ds->pending_buf = (uchf *) overlay;
 
     if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
         ds->pending_buf == Z_NULL) {
@@ -1143,8 +1184,7 @@ int ZEXPORT deflateCopy (dest, source)
     zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
 
     ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
-    ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
+    ds->sym_buf = ds->pending_buf + ds->lit_bufsize;
-    ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
 
     ds->l_desc.dyn_tree = ds->dyn_ltree;
     ds->d_desc.dyn_tree = ds->dyn_dtree;
@@ -1513,6 +1553,8 @@ local void fill_window(s)
             s->match_start -= wsize;
             s->strstart    -= wsize; /* we now have strstart >= MAX_DIST */
             s->block_start -= (long) wsize;
+            if (s->insert > s->strstart)
+                s->insert = s->strstart;
             slide_hash(s);
             more += wsize;
         }
@@ -1742,6 +1784,7 @@ local block_state deflate_stored(s, flush)
             s->matches = 2;         /* clear hash */
             zmemcpy(s->window, s->strm->next_in - s->w_size, s->w_size);
             s->strstart = s->w_size;
+            s->insert = s->strstart;
         }
         else {
             if (s->window_size - s->strstart <= used) {
@@ -1750,12 +1793,14 @@ local block_state deflate_stored(s, flush)
                 zmemcpy(s->window, s->window + s->w_size, s->strstart);
                 if (s->matches < 2)
                     s->matches++;   /* add a pending slide_hash() */
+                if (s->insert > s->strstart)
+                    s->insert = s->strstart;
             }
             zmemcpy(s->window + s->strstart, s->strm->next_in - used, used);
             s->strstart += used;
+            s->insert += MIN(used, s->w_size - s->insert);
         }
         s->block_start = s->strstart;
-        s->insert += MIN(used, s->w_size - s->insert);
     }
     if (s->high_water < s->strstart)
         s->high_water = s->strstart;
@@ -1770,7 +1815,7 @@ local block_state deflate_stored(s, flush)
         return block_done;
 
     /* Fill the window with any remaining input. */
-    have = s->window_size - s->strstart - 1;
+    have = s->window_size - s->strstart;
     if (s->strm->avail_in > have && s->block_start >= (long)s->w_size) {
         /* Slide the window down. */
         s->block_start -= s->w_size;
@@ -1779,12 +1824,15 @@ local block_state deflate_stored(s, flush)
         if (s->matches < 2)
             s->matches++;           /* add a pending slide_hash() */
         have += s->w_size;          /* more space now */
+        if (s->insert > s->strstart)
+            s->insert = s->strstart;
     }
     if (have > s->strm->avail_in)
         have = s->strm->avail_in;
     if (have) {
         read_buf(s->strm, s->window + s->strstart, have);
         s->strstart += have;
+        s->insert += MIN(have, s->w_size - s->insert);
     }
     if (s->high_water < s->strstart)
         s->high_water = s->strstart;
@@ -1912,7 +1960,7 @@ local block_state deflate_fast(s, flush)
         FLUSH_BLOCK(s, 1);
         return finish_done;
     }
-    if (s->last_lit)
+    if (s->sym_next)
         FLUSH_BLOCK(s, 0);
     return block_done;
 }
@@ -2043,7 +2091,7 @@ local block_state deflate_slow(s, flush)
         FLUSH_BLOCK(s, 1);
         return finish_done;
     }
-    if (s->last_lit)
+    if (s->sym_next)
         FLUSH_BLOCK(s, 0);
     return block_done;
 }
@@ -2118,7 +2166,7 @@ local block_state deflate_rle(s, flush)
         FLUSH_BLOCK(s, 1);
         return finish_done;
     }
-    if (s->last_lit)
+    if (s->sym_next)
         FLUSH_BLOCK(s, 0);
     return block_done;
 }
@@ -2157,7 +2205,7 @@ local block_state deflate_huff(s, flush)
         FLUSH_BLOCK(s, 1);
         return finish_done;
     }
-    if (s->last_lit)
+    if (s->sym_next)
         FLUSH_BLOCK(s, 0);
     return block_done;
 }

thirdparty/zlib/deflate.h

@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2016 Jean-loup Gailly
+ * Copyright (C) 1995-2018 Jean-loup Gailly
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -217,7 +217,7 @@ typedef struct internal_state {
     /* Depth of each subtree used as tie breaker for trees of equal frequency
      */
 
-    uchf *l_buf;          /* buffer for literals or lengths */
+    uchf *sym_buf;        /* buffer for distances and literals/lengths */
 
     uInt  lit_bufsize;
     /* Size of match buffer for literals/lengths.  There are 4 reasons for
@@ -239,13 +239,8 @@ typedef struct internal_state {
      *   - I can't count above 4
      */
 
-    uInt last_lit;      /* running index in l_buf */
+    uInt sym_next;      /* running index in sym_buf */
-
+    uInt sym_end;       /* symbol table full when sym_next reaches this */
-    ushf *d_buf;
-    /* Buffer for distances. To simplify the code, d_buf and l_buf have
-     * the same number of elements. To use different lengths, an extra flag
-     * array would be necessary.
-     */
 
     ulg opt_len;        /* bit length of current block with optimal trees */
     ulg static_len;     /* bit length of current block with static trees */
@@ -325,20 +320,22 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
 
 # define _tr_tally_lit(s, c, flush) \
   { uch cc = (c); \
-    s->d_buf[s->last_lit] = 0; \
+    s->sym_buf[s->sym_next++] = 0; \
-    s->l_buf[s->last_lit++] = cc; \
+    s->sym_buf[s->sym_next++] = 0; \
+    s->sym_buf[s->sym_next++] = cc; \
     s->dyn_ltree[cc].Freq++; \
-    flush = (s->last_lit == s->lit_bufsize-1); \
+    flush = (s->sym_next == s->sym_end); \
    }
 # define _tr_tally_dist(s, distance, length, flush) \
   { uch len = (uch)(length); \
     ush dist = (ush)(distance); \
-    s->d_buf[s->last_lit] = dist; \
+    s->sym_buf[s->sym_next++] = dist; \
-    s->l_buf[s->last_lit++] = len; \
+    s->sym_buf[s->sym_next++] = dist >> 8; \
+    s->sym_buf[s->sym_next++] = len; \
     dist--; \
     s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
     s->dyn_dtree[d_code(dist)].Freq++; \
-    flush = (s->last_lit == s->lit_bufsize-1); \
+    flush = (s->sym_next == s->sym_end); \
   }
 #else
 # define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)

thirdparty/zlib/gzguts.h

@@ -1,5 +1,5 @@
 /* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -39,7 +39,7 @@
 #  include <io.h>
 #endif
 
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32)
 #  define WIDECHAR
 #endif
 
@@ -190,6 +190,7 @@ typedef struct {
         /* just for writing */
     int level;              /* compression level */
     int strategy;           /* compression strategy */
+    int reset;              /* true if a reset is pending after a Z_FINISH */
         /* seek request */
     z_off64_t skip;         /* amount to skip (already rewound if backwards) */
     int seek;               /* true if seek request pending */

thirdparty/zlib/gzlib.c

@@ -1,11 +1,11 @@
 /* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004-2017 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 #include "gzguts.h"
 
-#if defined(_WIN32) && !defined(__BORLANDC__) && !defined(__MINGW32__)
+#if defined(_WIN32) && !defined(__BORLANDC__)
 #  define LSEEK _lseeki64
 #else
 #if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
@@ -81,6 +81,8 @@ local void gz_reset(state)
         state->past = 0;            /* have not read past end yet */
         state->how = LOOK;          /* look for gzip header */
     }
+    else                            /* for writing ... */
+        state->reset = 0;           /* no deflateReset pending */
     state->seek = 0;                /* no seek request pending */
     gz_error(state, Z_OK, NULL);    /* clear error */
     state->x.pos = 0;               /* no uncompressed data yet */
@@ -397,7 +399,7 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
     /* if within raw area while reading, just go there */
     if (state->mode == GZ_READ && state->how == COPY &&
             state->x.pos + offset >= 0) {
-        ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
+        ret = LSEEK(state->fd, offset - (z_off64_t)state->x.have, SEEK_CUR);
         if (ret == -1)
             return -1;
         state->x.have = 0;

thirdparty/zlib/gzread.c

@@ -1,5 +1,5 @@
 /* gzread.c -- zlib functions for reading gzip files
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -314,9 +314,9 @@ local z_size_t gz_read(state, buf, len)
     got = 0;
     do {
         /* set n to the maximum amount of len that fits in an unsigned int */
-        n = -1;
+        n = (unsigned)-1;
         if (n > len)
-            n = len;
+            n = (unsigned)len;
 
         /* first just try copying data from the output buffer */
         if (state->x.have) {
@@ -397,7 +397,7 @@ int ZEXPORT gzread(file, buf, len)
     }
 
     /* read len or fewer bytes to buf */
-    len = gz_read(state, buf, len);
+    len = (unsigned)gz_read(state, buf, len);
 
     /* check for an error */
     if (len == 0 && state->err != Z_OK && state->err != Z_BUF_ERROR)
@@ -447,7 +447,6 @@ z_size_t ZEXPORT gzfread(buf, size, nitems, file)
 int ZEXPORT gzgetc(file)
     gzFile file;
 {
-    int ret;
     unsigned char buf[1];
     gz_statep state;
 
@@ -469,8 +468,7 @@ int ZEXPORT gzgetc(file)
     }
 
     /* nothing there -- try gz_read() */
-    ret = gz_read(state, buf, 1);
+    return gz_read(state, buf, 1) < 1 ? -1 : buf[0];
-    return ret < 1 ? -1 : buf[0];
 }
 
 int ZEXPORT gzgetc_(file)

thirdparty/zlib/gzwrite.c

@@ -1,5 +1,5 @@
 /* gzwrite.c -- zlib functions for writing gzip files
- * Copyright (C) 2004-2017 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -97,6 +97,15 @@ local int gz_comp(state, flush)
         return 0;
     }
 
+    /* check for a pending reset */
+    if (state->reset) {
+        /* don't start a new gzip member unless there is data to write */
+        if (strm->avail_in == 0)
+            return 0;
+        deflateReset(strm);
+        state->reset = 0;
+    }
+
     /* run deflate() on provided input until it produces no more output */
     ret = Z_OK;
     do {
@@ -134,7 +143,7 @@ local int gz_comp(state, flush)
 
     /* if that completed a deflate stream, allow another to start */
     if (flush == Z_FINISH)
-        deflateReset(strm);
+        state->reset = 1;
 
     /* all done, no errors */
     return 0;
@@ -209,7 +218,7 @@ local z_size_t gz_write(state, buf, len)
                               state->in);
             copy = state->size - have;
             if (copy > len)
-                copy = len;
+                copy = (unsigned)len;
             memcpy(state->in + have, buf, copy);
             state->strm.avail_in += copy;
             state->x.pos += copy;
@@ -229,7 +238,7 @@ local z_size_t gz_write(state, buf, len)
         do {
             unsigned n = (unsigned)-1;
             if (n > len)
-                n = len;
+                n = (unsigned)len;
             state->strm.avail_in = n;
             state->x.pos += n;
             if (gz_comp(state, Z_NO_FLUSH) == -1)
@@ -349,12 +358,11 @@ int ZEXPORT gzputc(file, c)
 }
 
 /* -- see zlib.h -- */
-int ZEXPORT gzputs(file, str)
+int ZEXPORT gzputs(file, s)
     gzFile file;
-    const char *str;
+    const char *s;
 {
-    int ret;
+    z_size_t len, put;
-    z_size_t len;
     gz_statep state;
 
     /* get internal structure */
@@ -367,9 +375,13 @@ int ZEXPORT gzputs(file, str)
         return -1;
 
     /* write string */
-    len = strlen(str);
+    len = strlen(s);
-    ret = gz_write(state, str, len);
+    if ((int)len < 0 || (unsigned)len != len) {
-    return ret == 0 && len != 0 ? -1 : ret;
+        gz_error(state, Z_STREAM_ERROR, "string length does not fit in int");
+        return -1;
+    }
+    put = gz_write(state, s, len);
+    return put < len ? -1 : (int)len;
 }
 
 #if defined(STDC) || defined(Z_HAVE_STDARG_H)
@@ -441,7 +453,7 @@ int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
         strm->avail_in = state->size;
         if (gz_comp(state, Z_NO_FLUSH) == -1)
             return state->err;
-        memcpy(state->in, state->in + state->size, left);
+        memmove(state->in, state->in + state->size, left);
         strm->next_in = state->in;
         strm->avail_in = left;
     }
@@ -540,7 +552,7 @@ int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
         strm->avail_in = state->size;
         if (gz_comp(state, Z_NO_FLUSH) == -1)
             return state->err;
-        memcpy(state->in, state->in + state->size, left);
+        memmove(state->in, state->in + state->size, left);
         strm->next_in = state->in;
         strm->avail_in = left;
     }

thirdparty/zlib/infback.c

@@ -1,5 +1,5 @@
 /* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2016 Mark Adler
+ * Copyright (C) 1995-2022 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -477,6 +477,7 @@ void FAR *out_desc;
             }
             Tracev((stderr, "inflate:       codes ok\n"));
             state->mode = LEN;
+                /* fallthrough */
 
         case LEN:
             /* use inflate_fast() if we have enough input and output */

thirdparty/zlib/inffast.c

@@ -70,7 +70,7 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
     code const FAR *dcode;      /* local strm->distcode */
     unsigned lmask;             /* mask for first level of length codes */
     unsigned dmask;             /* mask for first level of distance codes */
-    code here;                  /* retrieved table entry */
+    code const *here;           /* retrieved table entry */
     unsigned op;                /* code bits, operation, extra bits, or */
                                 /*  window position, window bytes to copy */
     unsigned len;               /* match length, unused bytes */
@@ -107,20 +107,20 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
             hold += (unsigned long)(*in++) << bits;
             bits += 8;
         }
-        here = lcode[hold & lmask];
+        here = lcode + (hold & lmask);
       dolen:
-        op = (unsigned)(here.bits);
+        op = (unsigned)(here->bits);
         hold >>= op;
         bits -= op;
-        op = (unsigned)(here.op);
+        op = (unsigned)(here->op);
         if (op == 0) {                          /* literal */
-            Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
+            Tracevv((stderr, here->val >= 0x20 && here->val < 0x7f ?
                     "inflate:         literal '%c'\n" :
-                    "inflate:         literal 0x%02x\n", here.val));
+                    "inflate:         literal 0x%02x\n", here->val));
-            *out++ = (unsigned char)(here.val);
+            *out++ = (unsigned char)(here->val);
         }
         else if (op & 16) {                     /* length base */
-            len = (unsigned)(here.val);
+            len = (unsigned)(here->val);
             op &= 15;                           /* number of extra bits */
             if (op) {
                 if (bits < op) {
@@ -138,14 +138,14 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                 hold += (unsigned long)(*in++) << bits;
                 bits += 8;
             }
-            here = dcode[hold & dmask];
+            here = dcode + (hold & dmask);
           dodist:
-            op = (unsigned)(here.bits);
+            op = (unsigned)(here->bits);
             hold >>= op;
             bits -= op;
-            op = (unsigned)(here.op);
+            op = (unsigned)(here->op);
             if (op & 16) {                      /* distance base */
-                dist = (unsigned)(here.val);
+                dist = (unsigned)(here->val);
                 op &= 15;                       /* number of extra bits */
                 if (bits < op) {
                     hold += (unsigned long)(*in++) << bits;
@@ -264,7 +264,7 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                 }
             }
             else if ((op & 64) == 0) {          /* 2nd level distance code */
-                here = dcode[here.val + (hold & ((1U << op) - 1))];
+                here = dcode + here->val + (hold & ((1U << op) - 1));
                 goto dodist;
             }
             else {
@@ -274,7 +274,7 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
             }
         }
         else if ((op & 64) == 0) {              /* 2nd level length code */
-            here = lcode[here.val + (hold & ((1U << op) - 1))];
+            here = lcode + here->val + (hold & ((1U << op) - 1));
             goto dolen;
         }
         else if (op & 32) {                     /* end-of-block */

thirdparty/zlib/inflate.c

@@ -1,5 +1,5 @@
 /* inflate.c -- zlib decompression
- * Copyright (C) 1995-2016 Mark Adler
+ * Copyright (C) 1995-2022 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -130,6 +130,7 @@ z_streamp strm;
     state->mode = HEAD;
     state->last = 0;
     state->havedict = 0;
+    state->flags = -1;
     state->dmax = 32768U;
     state->head = Z_NULL;
     state->hold = 0;
@@ -447,10 +448,10 @@ unsigned copy;
 
 /* check function to use adler32() for zlib or crc32() for gzip */
 #ifdef GUNZIP
-#  define UPDATE(check, buf, len) \
+#  define UPDATE_CHECK(check, buf, len) \
     (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
 #else
-#  define UPDATE(check, buf, len) adler32(check, buf, len)
+#  define UPDATE_CHECK(check, buf, len) adler32(check, buf, len)
 #endif
 
 /* check macros for header crc */
@@ -670,7 +671,6 @@ int flush;
                 state->mode = FLAGS;
                 break;
             }
-            state->flags = 0;           /* expect zlib header */
             if (state->head != Z_NULL)
                 state->head->done = -1;
             if (!(state->wrap & 1) ||   /* check if zlib header allowed */
@@ -697,6 +697,7 @@ int flush;
                 break;
             }
             state->dmax = 1U << len;
+            state->flags = 0;               /* indicate zlib header */
             Tracev((stderr, "inflate:   zlib header ok\n"));
             strm->adler = state->check = adler32(0L, Z_NULL, 0);
             state->mode = hold & 0x200 ? DICTID : TYPE;
@@ -722,6 +723,7 @@ int flush;
                 CRC2(state->check, hold);
             INITBITS();
             state->mode = TIME;
+                /* fallthrough */
         case TIME:
             NEEDBITS(32);
             if (state->head != Z_NULL)
@@ -730,6 +732,7 @@ int flush;
                 CRC4(state->check, hold);
             INITBITS();
             state->mode = OS;
+                /* fallthrough */
         case OS:
             NEEDBITS(16);
             if (state->head != Z_NULL) {
@@ -740,6 +743,7 @@ int flush;
                 CRC2(state->check, hold);
             INITBITS();
             state->mode = EXLEN;
+                /* fallthrough */
         case EXLEN:
             if (state->flags & 0x0400) {
                 NEEDBITS(16);
@@ -753,6 +757,7 @@ int flush;
             else if (state->head != Z_NULL)
                 state->head->extra = Z_NULL;
             state->mode = EXTRA;
+                /* fallthrough */
         case EXTRA:
             if (state->flags & 0x0400) {
                 copy = state->length;
@@ -775,6 +780,7 @@ int flush;
             }
             state->length = 0;
             state->mode = NAME;
+                /* fallthrough */
         case NAME:
             if (state->flags & 0x0800) {
                 if (have == 0) goto inf_leave;
@@ -796,6 +802,7 @@ int flush;
                 state->head->name = Z_NULL;
             state->length = 0;
             state->mode = COMMENT;
+                /* fallthrough */
         case COMMENT:
             if (state->flags & 0x1000) {
                 if (have == 0) goto inf_leave;
@@ -816,6 +823,7 @@ int flush;
             else if (state->head != Z_NULL)
                 state->head->comment = Z_NULL;
             state->mode = HCRC;
+                /* fallthrough */
         case HCRC:
             if (state->flags & 0x0200) {
                 NEEDBITS(16);
@@ -839,6 +847,7 @@ int flush;
             strm->adler = state->check = ZSWAP32(hold);
             INITBITS();
             state->mode = DICT;
+                /* fallthrough */
         case DICT:
             if (state->havedict == 0) {
                 RESTORE();
@@ -846,8 +855,10 @@ int flush;
             }
             strm->adler = state->check = adler32(0L, Z_NULL, 0);
             state->mode = TYPE;
+                /* fallthrough */
         case TYPE:
             if (flush == Z_BLOCK || flush == Z_TREES) goto inf_leave;
+                /* fallthrough */
         case TYPEDO:
             if (state->last) {
                 BYTEBITS();
@@ -898,8 +909,10 @@ int flush;
             INITBITS();
             state->mode = COPY_;
             if (flush == Z_TREES) goto inf_leave;
+                /* fallthrough */
         case COPY_:
             state->mode = COPY;
+                /* fallthrough */
         case COPY:
             copy = state->length;
             if (copy) {
@@ -935,6 +948,7 @@ int flush;
             Tracev((stderr, "inflate:       table sizes ok\n"));
             state->have = 0;
             state->mode = LENLENS;
+                /* fallthrough */
         case LENLENS:
             while (state->have < state->ncode) {
                 NEEDBITS(3);
@@ -956,6 +970,7 @@ int flush;
             Tracev((stderr, "inflate:       code lengths ok\n"));
             state->have = 0;
             state->mode = CODELENS;
+                /* fallthrough */
         case CODELENS:
             while (state->have < state->nlen + state->ndist) {
                 for (;;) {
@@ -1039,8 +1054,10 @@ int flush;
             Tracev((stderr, "inflate:       codes ok\n"));
             state->mode = LEN_;
             if (flush == Z_TREES) goto inf_leave;
+                /* fallthrough */
         case LEN_:
             state->mode = LEN;
+                /* fallthrough */
         case LEN:
             if (have >= 6 && left >= 258) {
                 RESTORE();
@@ -1090,6 +1107,7 @@ int flush;
             }
             state->extra = (unsigned)(here.op) & 15;
             state->mode = LENEXT;
+                /* fallthrough */
         case LENEXT:
             if (state->extra) {
                 NEEDBITS(state->extra);
@@ -1100,6 +1118,7 @@ int flush;
             Tracevv((stderr, "inflate:         length %u\n", state->length));
             state->was = state->length;
             state->mode = DIST;
+                /* fallthrough */
         case DIST:
             for (;;) {
                 here = state->distcode[BITS(state->distbits)];
@@ -1127,6 +1146,7 @@ int flush;
             state->offset = (unsigned)here.val;
             state->extra = (unsigned)(here.op) & 15;
             state->mode = DISTEXT;
+                /* fallthrough */
         case DISTEXT:
             if (state->extra) {
                 NEEDBITS(state->extra);
@@ -1143,6 +1163,7 @@ int flush;
 #endif
             Tracevv((stderr, "inflate:         distance %u\n", state->offset));
             state->mode = MATCH;
+                /* fallthrough */
         case MATCH:
             if (left == 0) goto inf_leave;
             copy = out - left;
@@ -1202,7 +1223,7 @@ int flush;
                 state->total += out;
                 if ((state->wrap & 4) && out)
                     strm->adler = state->check =
-                        UPDATE(state->check, put - out, out);
+                        UPDATE_CHECK(state->check, put - out, out);
                 out = left;
                 if ((state->wrap & 4) && (
 #ifdef GUNZIP
@@ -1218,10 +1239,11 @@ int flush;
             }
 #ifdef GUNZIP
             state->mode = LENGTH;
+                /* fallthrough */
         case LENGTH:
             if (state->wrap && state->flags) {
                 NEEDBITS(32);
-                if (hold != (state->total & 0xffffffffUL)) {
+                if ((state->wrap & 4) && hold != (state->total & 0xffffffff)) {
                     strm->msg = (char *)"incorrect length check";
                     state->mode = BAD;
                     break;
@@ -1231,6 +1253,7 @@ int flush;
             }
 #endif
             state->mode = DONE;
+                /* fallthrough */
         case DONE:
             ret = Z_STREAM_END;
             goto inf_leave;
@@ -1240,6 +1263,7 @@ int flush;
         case MEM:
             return Z_MEM_ERROR;
         case SYNC:
+                /* fallthrough */
         default:
             return Z_STREAM_ERROR;
         }
@@ -1265,7 +1289,7 @@ int flush;
     state->total += out;
     if ((state->wrap & 4) && out)
         strm->adler = state->check =
-            UPDATE(state->check, strm->next_out - out, out);
+            UPDATE_CHECK(state->check, strm->next_out - out, out);
     strm->data_type = (int)state->bits + (state->last ? 64 : 0) +
                       (state->mode == TYPE ? 128 : 0) +
                       (state->mode == LEN_ || state->mode == COPY_ ? 256 : 0);
@@ -1401,6 +1425,7 @@ int ZEXPORT inflateSync(strm)
 z_streamp strm;
 {
     unsigned len;               /* number of bytes to look at or looked at */
+    int flags;                  /* temporary to save header status */
     unsigned long in, out;      /* temporary to save total_in and total_out */
     unsigned char buf[4];       /* to restore bit buffer to byte string */
     struct inflate_state FAR *state;
@@ -1433,9 +1458,15 @@ z_streamp strm;
 
     /* return no joy or set up to restart inflate() on a new block */
     if (state->have != 4) return Z_DATA_ERROR;
+    if (state->flags == -1)
+        state->wrap = 0;    /* if no header yet, treat as raw */
+    else
+        state->wrap &= ~4;  /* no point in computing a check value now */
+    flags = state->flags;
     in = strm->total_in;  out = strm->total_out;
     inflateReset(strm);
     strm->total_in = in;  strm->total_out = out;
+    state->flags = flags;
     state->mode = TYPE;
     return Z_OK;
 }
@@ -1531,7 +1562,7 @@ int check;
 
     if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
     state = (struct inflate_state FAR *)strm->state;
-    if (check)
+    if (check && state->wrap)
         state->wrap |= 4;
     else
         state->wrap &= ~4;

thirdparty/zlib/inflate.h

@@ -1,5 +1,5 @@
 /* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2016 Mark Adler
+ * Copyright (C) 1995-2019 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -86,7 +86,8 @@ struct inflate_state {
     int wrap;                   /* bit 0 true for zlib, bit 1 true for gzip,
                                    bit 2 true to validate check value */
     int havedict;               /* true if dictionary provided */
-    int flags;                  /* gzip header method and flags (0 if zlib) */
+    int flags;                  /* gzip header method and flags, 0 if zlib, or
+                                   -1 if raw or no header yet */
     unsigned dmax;              /* zlib header max distance (INFLATE_STRICT) */
     unsigned long check;        /* protected copy of check value */
     unsigned long total;        /* protected copy of output count */

thirdparty/zlib/inftrees.c

@@ -1,5 +1,5 @@
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2017 Mark Adler
+ * Copyright (C) 1995-2022 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate_copyright[] =
-   " inflate 1.2.11 Copyright 1995-2017 Mark Adler ";
+   " inflate 1.2.12 Copyright 1995-2022 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -62,7 +62,7 @@ unsigned short FAR *work;
         35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
     static const unsigned short lext[31] = { /* Length codes 257..285 extra */
         16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 77, 202};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 202};
     static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
         1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
         257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,

thirdparty/zlib/trees.c

@@ -1,5 +1,5 @@
 /* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2017 Jean-loup Gailly
+ * Copyright (C) 1995-2021 Jean-loup Gailly
  * detect_data_type() function provided freely by Cosmin Truta, 2006
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
@@ -149,7 +149,7 @@ local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
 local void compress_block OF((deflate_state *s, const ct_data *ltree,
                               const ct_data *dtree));
 local int  detect_data_type OF((deflate_state *s));
-local unsigned bi_reverse OF((unsigned value, int length));
+local unsigned bi_reverse OF((unsigned code, int len));
 local void bi_windup      OF((deflate_state *s));
 local void bi_flush       OF((deflate_state *s));
 
@@ -416,7 +416,7 @@ local void init_block(s)
 
     s->dyn_ltree[END_BLOCK].Freq = 1;
     s->opt_len = s->static_len = 0L;
-    s->last_lit = s->matches = 0;
+    s->sym_next = s->matches = 0;
 }
 
 #define SMALLEST 1
@@ -870,6 +870,7 @@ void ZLIB_INTERNAL _tr_stored_block(s, buf, stored_len, last)
     bi_windup(s);        /* align on byte boundary */
     put_short(s, (ush)stored_len);
     put_short(s, (ush)~stored_len);
+    if (stored_len)
         zmemcpy(s->pending_buf + s->pending, (Bytef *)buf, stored_len);
     s->pending += stored_len;
 #ifdef ZLIB_DEBUG
@@ -947,7 +948,7 @@ void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
 
         Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
                 opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
-                s->last_lit));
+                s->sym_next / 3));
 
         if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
 
@@ -1016,8 +1017,9 @@ int ZLIB_INTERNAL _tr_tally (s, dist, lc)
     unsigned dist;  /* distance of matched string */
     unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
 {
-    s->d_buf[s->last_lit] = (ush)dist;
+    s->sym_buf[s->sym_next++] = dist;
-    s->l_buf[s->last_lit++] = (uch)lc;
+    s->sym_buf[s->sym_next++] = dist >> 8;
+    s->sym_buf[s->sym_next++] = lc;
     if (dist == 0) {
         /* lc is the unmatched char */
         s->dyn_ltree[lc].Freq++;
@@ -1032,30 +1034,7 @@ int ZLIB_INTERNAL _tr_tally (s, dist, lc)
         s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
         s->dyn_dtree[d_code(dist)].Freq++;
     }
-
+    return (s->sym_next == s->sym_end);
-#ifdef TRUNCATE_BLOCK
-    /* Try to guess if it is profitable to stop the current block here */
-    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
-        /* Compute an upper bound for the compressed length */
-        ulg out_length = (ulg)s->last_lit*8L;
-        ulg in_length = (ulg)((long)s->strstart - s->block_start);
-        int dcode;
-        for (dcode = 0; dcode < D_CODES; dcode++) {
-            out_length += (ulg)s->dyn_dtree[dcode].Freq *
-                (5L+extra_dbits[dcode]);
-        }
-        out_length >>= 3;
-        Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
-               s->last_lit, in_length, out_length,
-               100L - out_length*100L/in_length));
-        if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
-    }
-#endif
-    return (s->last_lit == s->lit_bufsize-1);
-    /* We avoid equality with lit_bufsize because of wraparound at 64K
-     * on 16 bit machines and because stored blocks are restricted to
-     * 64K-1 bytes.
-     */
 }
 
 /* ===========================================================================
@@ -1068,13 +1047,14 @@ local void compress_block(s, ltree, dtree)
 {
     unsigned dist;      /* distance of matched string */
     int lc;             /* match length or unmatched char (if dist == 0) */
-    unsigned lx = 0;    /* running index in l_buf */
+    unsigned sx = 0;    /* running index in sym_buf */
     unsigned code;      /* the code to send */
     int extra;          /* number of extra bits to send */
 
-    if (s->last_lit != 0) do {
+    if (s->sym_next != 0) do {
-        dist = s->d_buf[lx];
+        dist = s->sym_buf[sx++] & 0xff;
-        lc = s->l_buf[lx++];
+        dist += (unsigned)(s->sym_buf[sx++] & 0xff) << 8;
+        lc = s->sym_buf[sx++];
         if (dist == 0) {
             send_code(s, lc, ltree); /* send a literal byte */
             Tracecv(isgraph(lc), (stderr," '%c' ", lc));
@@ -1099,11 +1079,10 @@ local void compress_block(s, ltree, dtree)
             }
         } /* literal or match pair ? */
 
-        /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
+        /* Check that the overlay between pending_buf and sym_buf is ok: */
-        Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
+        Assert(s->pending < s->lit_bufsize + sx, "pendingBuf overflow");
-               "pendingBuf overflow");
 
-    } while (lx < s->last_lit);
+    } while (sx < s->sym_next);
 
     send_code(s, END_BLOCK, ltree);
 }
@@ -1112,9 +1091,9 @@ local void compress_block(s, ltree, dtree)
  * Check if the data type is TEXT or BINARY, using the following algorithm:
  * - TEXT if the two conditions below are satisfied:
  *    a) There are no non-portable control characters belonging to the
- *       "black list" (0..6, 14..25, 28..31).
+ *       "block list" (0..6, 14..25, 28..31).
  *    b) There is at least one printable character belonging to the
- *       "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
+ *       "allow list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
  * - BINARY otherwise.
  * - The following partially-portable control characters form a
  *   "gray list" that is ignored in this detection algorithm:
@@ -1124,19 +1103,19 @@ local void compress_block(s, ltree, dtree)
 local int detect_data_type(s)
     deflate_state *s;
 {
-    /* black_mask is the bit mask of black-listed bytes
+    /* block_mask is the bit mask of block-listed bytes
      * set bits 0..6, 14..25, and 28..31
      * 0xf3ffc07f = binary 11110011111111111100000001111111
      */
-    unsigned long black_mask = 0xf3ffc07fUL;
+    unsigned long block_mask = 0xf3ffc07fUL;
     int n;
 
-    /* Check for non-textual ("black-listed") bytes. */
+    /* Check for non-textual ("block-listed") bytes. */
-    for (n = 0; n <= 31; n++, black_mask >>= 1)
+    for (n = 0; n <= 31; n++, block_mask >>= 1)
-        if ((black_mask & 1) && (s->dyn_ltree[n].Freq != 0))
+        if ((block_mask & 1) && (s->dyn_ltree[n].Freq != 0))
             return Z_BINARY;
 
-    /* Check for textual ("white-listed") bytes. */
+    /* Check for textual ("allow-listed") bytes. */
     if (s->dyn_ltree[9].Freq != 0 || s->dyn_ltree[10].Freq != 0
             || s->dyn_ltree[13].Freq != 0)
         return Z_TEXT;
@@ -1144,7 +1123,7 @@ local int detect_data_type(s)
         if (s->dyn_ltree[n].Freq != 0)
             return Z_TEXT;
 
-    /* There are no "black-listed" or "white-listed" bytes:
+    /* There are no "block-listed" or "allow-listed" bytes:
      * this stream either is empty or has tolerated ("gray-listed") bytes only.
      */
     return Z_BINARY;

thirdparty/zlib/zlib.h

@@ -1,7 +1,7 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.2.11, January 15th, 2017
+  version 1.2.12, March 11th, 2022
 
-  Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
+  Copyright (C) 1995-2022 Jean-loup Gailly and Mark Adler
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -37,11 +37,11 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.2.11"
+#define ZLIB_VERSION "1.2.12"
-#define ZLIB_VERNUM 0x12b0
+#define ZLIB_VERNUM 0x12c0
 #define ZLIB_VER_MAJOR 1
 #define ZLIB_VER_MINOR 2
-#define ZLIB_VER_REVISION 11
+#define ZLIB_VER_REVISION 12
 #define ZLIB_VER_SUBREVISION 0
 
 /*
@@ -543,8 +543,7 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
                                      int  strategy));
 
      This is another version of deflateInit with more compression options.  The
-   fields next_in, zalloc, zfree and opaque must be initialized before by the
+   fields zalloc, zfree and opaque must be initialized before by the caller.
-   caller.
 
      The method parameter is the compression method.  It must be Z_DEFLATED in
    this version of the library.
@@ -712,11 +711,12 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
    used to switch between compression and straight copy of the input data, or
    to switch to a different kind of input data requiring a different strategy.
    If the compression approach (which is a function of the level) or the
-   strategy is changed, and if any input has been consumed in a previous
+   strategy is changed, and if there have been any deflate() calls since the
-   deflate() call, then the input available so far is compressed with the old
+   state was initialized or reset, then the input available so far is
-   level and strategy using deflate(strm, Z_BLOCK).  There are three approaches
+   compressed with the old level and strategy using deflate(strm, Z_BLOCK).
-   for the compression levels 0, 1..3, and 4..9 respectively.  The new level
+   There are three approaches for the compression levels 0, 1..3, and 4..9
-   and strategy will take effect at the next call of deflate().
+   respectively.  The new level and strategy will take effect at the next call
+   of deflate().
 
      If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does
    not have enough output space to complete, then the parameter change will not
@@ -865,9 +865,11 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
    detection, or add 16 to decode only the gzip format (the zlib format will
    return a Z_DATA_ERROR).  If a gzip stream is being decoded, strm->adler is a
    CRC-32 instead of an Adler-32.  Unlike the gunzip utility and gzread() (see
-   below), inflate() will not automatically decode concatenated gzip streams.
+   below), inflate() will *not* automatically decode concatenated gzip members.
-   inflate() will return Z_STREAM_END at the end of the gzip stream.  The state
+   inflate() will return Z_STREAM_END at the end of the gzip member.  The state
-   would need to be reset to continue decoding a subsequent gzip stream.
+   would need to be reset to continue decoding a subsequent gzip member.  This
+   *must* be done if there is more data after a gzip member, in order for the
+   decompression to be compliant with the gzip standard (RFC 1952).
 
      inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
    memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
@@ -1302,14 +1304,14 @@ typedef struct gzFile_s *gzFile;    /* semi-opaque gzip file descriptor */
 /*
 ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
 
-     Opens a gzip (.gz) file for reading or writing.  The mode parameter is as
+     Open the gzip (.gz) file at path for reading and decompressing, or
-   in fopen ("rb" or "wb") but can also include a compression level ("wb9") or
+   compressing and writing.  The mode parameter is as in fopen ("rb" or "wb")
-   a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only
+   but can also include a compression level ("wb9") or a strategy: 'f' for
-   compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F'
+   filtered data as in "wb6f", 'h' for Huffman-only compression as in "wb1h",
-   for fixed code compression as in "wb9F".  (See the description of
+   'R' for run-length encoding as in "wb1R", or 'F' for fixed code compression
-   deflateInit2 for more information about the strategy parameter.)  'T' will
+   as in "wb9F".  (See the description of deflateInit2 for more information
-   request transparent writing or appending with no compression and not using
+   about the strategy parameter.)  'T' will request transparent writing or
-   the gzip format.
+   appending with no compression and not using the gzip format.
 
      "a" can be used instead of "w" to request that the gzip stream that will
    be written be appended to the file.  "+" will result in an error, since
@@ -1339,9 +1341,9 @@ ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
 
 ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
 /*
-     gzdopen associates a gzFile with the file descriptor fd.  File descriptors
+     Associate a gzFile with the file descriptor fd.  File descriptors are
-   are obtained from calls like open, dup, creat, pipe or fileno (if the file
+   obtained from calls like open, dup, creat, pipe or fileno (if the file has
-   has been previously opened with fopen).  The mode parameter is as in gzopen.
+   been previously opened with fopen).  The mode parameter is as in gzopen.
 
      The next call of gzclose on the returned gzFile will also close the file
    descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor
@@ -1362,13 +1364,13 @@ ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
 
 ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
 /*
-     Set the internal buffer size used by this library's functions.  The
+     Set the internal buffer size used by this library's functions for file to
-   default buffer size is 8192 bytes.  This function must be called after
+   size.  The default buffer size is 8192 bytes.  This function must be called
-   gzopen() or gzdopen(), and before any other calls that read or write the
+   after gzopen() or gzdopen(), and before any other calls that read or write
-   file.  The buffer memory allocation is always deferred to the first read or
+   the file.  The buffer memory allocation is always deferred to the first read
-   write.  Three times that size in buffer space is allocated.  A larger buffer
+   or write.  Three times that size in buffer space is allocated.  A larger
-   size of, for example, 64K or 128K bytes will noticeably increase the speed
+   buffer size of, for example, 64K or 128K bytes will noticeably increase the
-   of decompression (reading).
+   speed of decompression (reading).
 
      The new buffer size also affects the maximum length for gzprintf().
 
@@ -1378,9 +1380,9 @@ ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
 
 ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
 /*
-     Dynamically update the compression level or strategy.  See the description
+     Dynamically update the compression level and strategy for file.  See the
-   of deflateInit2 for the meaning of these parameters.  Previously provided
+   description of deflateInit2 for the meaning of these parameters. Previously
-   data is flushed before the parameter change.
+   provided data is flushed before applying the parameter changes.
 
      gzsetparams returns Z_OK if success, Z_STREAM_ERROR if the file was not
    opened for writing, Z_ERRNO if there is an error writing the flushed data,
@@ -1389,7 +1391,7 @@ ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
 
 ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
 /*
-     Reads the given number of uncompressed bytes from the compressed file.  If
+     Read and decompress up to len uncompressed bytes from file into buf.  If
    the input file is not in gzip format, gzread copies the given number of
    bytes into the buffer directly from the file.
 
@@ -1420,11 +1422,11 @@ ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
 ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems,
                                      gzFile file));
 /*
-     Read up to nitems items of size size from file to buf, otherwise operating
+     Read and decompress up to nitems items of size size from file into buf,
-   as gzread() does.  This duplicates the interface of stdio's fread(), with
+   otherwise operating as gzread() does.  This duplicates the interface of
-   size_t request and return types.  If the library defines size_t, then
+   stdio's fread(), with size_t request and return types.  If the library
-   z_size_t is identical to size_t.  If not, then z_size_t is an unsigned
+   defines size_t, then z_size_t is identical to size_t.  If not, then z_size_t
-   integer type that can contain a pointer.
+   is an unsigned integer type that can contain a pointer.
 
      gzfread() returns the number of full items read of size size, or zero if
    the end of the file was reached and a full item could not be read, or if
@@ -1443,18 +1445,16 @@ ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems,
    file, reseting and retrying on end-of-file, when size is not 1.
 */
 
-ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
+ZEXTERN int ZEXPORT gzwrite OF((gzFile file, voidpc buf, unsigned len));
-                                voidpc buf, unsigned len));
 /*
-     Writes the given number of uncompressed bytes into the compressed file.
+     Compress and write the len uncompressed bytes at buf to file. gzwrite
-   gzwrite returns the number of uncompressed bytes written or 0 in case of
+   returns the number of uncompressed bytes written or 0 in case of error.
-   error.
 */
 
 ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size,
                                       z_size_t nitems, gzFile file));
 /*
-     gzfwrite() writes nitems items of size size from buf to file, duplicating
+     Compress and write nitems items of size size from buf to file, duplicating
    the interface of stdio's fwrite(), with size_t request and return types.  If
    the library defines size_t, then z_size_t is identical to size_t.  If not,
    then z_size_t is an unsigned integer type that can contain a pointer.
@@ -1467,22 +1467,22 @@ ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size,
 
 ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...));
 /*
-     Converts, formats, and writes the arguments to the compressed file under
+     Convert, format, compress, and write the arguments (...) to file under
-   control of the format string, as in fprintf.  gzprintf returns the number of
+   control of the string format, as in fprintf.  gzprintf returns the number of
    uncompressed bytes actually written, or a negative zlib error code in case
    of error.  The number of uncompressed bytes written is limited to 8191, or
    one less than the buffer size given to gzbuffer().  The caller should assure
    that this limit is not exceeded.  If it is exceeded, then gzprintf() will
    return an error (0) with nothing written.  In this case, there may also be a
    buffer overflow with unpredictable consequences, which is possible only if
-   zlib was compiled with the insecure functions sprintf() or vsprintf()
+   zlib was compiled with the insecure functions sprintf() or vsprintf(),
    because the secure snprintf() or vsnprintf() functions were not available.
    This can be determined using zlibCompileFlags().
 */
 
 ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
 /*
-     Writes the given null-terminated string to the compressed file, excluding
+     Compress and write the given null-terminated string s to file, excluding
    the terminating null character.
 
      gzputs returns the number of characters written, or -1 in case of error.
@@ -1490,11 +1490,12 @@ ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
 
 ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
 /*
-     Reads bytes from the compressed file until len-1 characters are read, or a
+     Read and decompress bytes from file into buf, until len-1 characters are
-   newline character is read and transferred to buf, or an end-of-file
+   read, or until a newline character is read and transferred to buf, or an
-   condition is encountered.  If any characters are read or if len == 1, the
+   end-of-file condition is encountered.  If any characters are read or if len
-   string is terminated with a null character.  If no characters are read due
+   is one, the string is terminated with a null character.  If no characters
-   to an end-of-file or len < 1, then the buffer is left untouched.
+   are read due to an end-of-file or len is less than one, then the buffer is
+   left untouched.
 
      gzgets returns buf which is a null-terminated string, or it returns NULL
    for end-of-file or in case of error.  If there was an error, the contents at
@@ -1503,13 +1504,13 @@ ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
 
 ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
 /*
-     Writes c, converted to an unsigned char, into the compressed file.  gzputc
+     Compress and write c, converted to an unsigned char, into file.  gzputc
    returns the value that was written, or -1 in case of error.
 */
 
 ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
 /*
-     Reads one byte from the compressed file.  gzgetc returns this byte or -1
+     Read and decompress one byte from file.  gzgetc returns this byte or -1
    in case of end of file or error.  This is implemented as a macro for speed.
    As such, it does not do all of the checking the other functions do.  I.e.
    it does not check to see if file is NULL, nor whether the structure file
@@ -1518,8 +1519,8 @@ ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
 
 ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
 /*
-     Push one character back onto the stream to be read as the first character
+     Push c back onto the stream for file to be read as the first character on
-   on the next read.  At least one character of push-back is allowed.
+   the next read.  At least one character of push-back is always allowed.
    gzungetc() returns the character pushed, or -1 on failure.  gzungetc() will
    fail if c is -1, and may fail if a character has been pushed but not read
    yet.  If gzungetc is used immediately after gzopen or gzdopen, at least the
@@ -1530,9 +1531,9 @@ ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
 
 ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
 /*
-     Flushes all pending output into the compressed file.  The parameter flush
+     Flush all pending output to file.  The parameter flush is as in the
-   is as in the deflate() function.  The return value is the zlib error number
+   deflate() function.  The return value is the zlib error number (see function
-   (see function gzerror below).  gzflush is only permitted when writing.
+   gzerror below).  gzflush is only permitted when writing.
 
      If the flush parameter is Z_FINISH, the remaining data is written and the
    gzip stream is completed in the output.  If gzwrite() is called again, a new
@@ -1547,8 +1548,8 @@ ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
 ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
                                    z_off_t offset, int whence));
 
-     Sets the starting position for the next gzread or gzwrite on the given
+     Set the starting position to offset relative to whence for the next gzread
-   compressed file.  The offset represents a number of bytes in the
+   or gzwrite on file.  The offset represents a number of bytes in the
    uncompressed data stream.  The whence parameter is defined as in lseek(2);
    the value SEEK_END is not supported.
 
@@ -1565,18 +1566,18 @@ ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
 
 ZEXTERN int ZEXPORT    gzrewind OF((gzFile file));
 /*
-     Rewinds the given file. This function is supported only for reading.
+     Rewind file. This function is supported only for reading.
 
-     gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
+     gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET).
 */
 
 /*
 ZEXTERN z_off_t ZEXPORT    gztell OF((gzFile file));
 
-     Returns the starting position for the next gzread or gzwrite on the given
+     Return the starting position for the next gzread or gzwrite on file.
-   compressed file.  This position represents a number of bytes in the
+   This position represents a number of bytes in the uncompressed data stream,
-   uncompressed data stream, and is zero when starting, even if appending or
+   and is zero when starting, even if appending or reading a gzip stream from
-   reading a gzip stream from the middle of a file using gzdopen().
+   the middle of a file using gzdopen().
 
      gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
 */
@@ -1584,22 +1585,22 @@ ZEXTERN z_off_t ZEXPORT    gztell OF((gzFile file));
 /*
 ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file));
 
-     Returns the current offset in the file being read or written.  This offset
+     Return the current compressed (actual) read or write offset of file.  This
-   includes the count of bytes that precede the gzip stream, for example when
+   offset includes the count of bytes that precede the gzip stream, for example
-   appending or when using gzdopen() for reading.  When reading, the offset
+   when appending or when using gzdopen() for reading.  When reading, the
-   does not include as yet unused buffered input.  This information can be used
+   offset does not include as yet unused buffered input.  This information can
-   for a progress indicator.  On error, gzoffset() returns -1.
+   be used for a progress indicator.  On error, gzoffset() returns -1.
 */
 
 ZEXTERN int ZEXPORT gzeof OF((gzFile file));
 /*
-     Returns true (1) if the end-of-file indicator has been set while reading,
+     Return true (1) if the end-of-file indicator for file has been set while
-   false (0) otherwise.  Note that the end-of-file indicator is set only if the
+   reading, false (0) otherwise.  Note that the end-of-file indicator is set
-   read tried to go past the end of the input, but came up short.  Therefore,
+   only if the read tried to go past the end of the input, but came up short.
-   just like feof(), gzeof() may return false even if there is no more data to
+   Therefore, just like feof(), gzeof() may return false even if there is no
-   read, in the event that the last read request was for the exact number of
+   more data to read, in the event that the last read request was for the exact
-   bytes remaining in the input file.  This will happen if the input file size
+   number of bytes remaining in the input file.  This will happen if the input
-   is an exact multiple of the buffer size.
+   file size is an exact multiple of the buffer size.
 
      If gzeof() returns true, then the read functions will return no more data,
    unless the end-of-file indicator is reset by gzclearerr() and the input file
@@ -1608,7 +1609,7 @@ ZEXTERN int ZEXPORT gzeof OF((gzFile file));
 
 ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
 /*
-     Returns true (1) if file is being copied directly while reading, or false
+     Return true (1) if file is being copied directly while reading, or false
    (0) if file is a gzip stream being decompressed.
 
      If the input file is empty, gzdirect() will return true, since the input
@@ -1629,8 +1630,8 @@ ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
 
 ZEXTERN int ZEXPORT    gzclose OF((gzFile file));
 /*
-     Flushes all pending output if necessary, closes the compressed file and
+     Flush all pending output for file, if necessary, close file and
-   deallocates the (de)compression state.  Note that once file is closed, you
+   deallocate the (de)compression state.  Note that once file is closed, you
    cannot call gzerror with file, since its structures have been deallocated.
    gzclose must not be called more than once on the same file, just as free
    must not be called more than once on the same allocation.
@@ -1654,10 +1655,10 @@ ZEXTERN int ZEXPORT gzclose_w OF((gzFile file));
 
 ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
 /*
-     Returns the error message for the last error which occurred on the given
+     Return the error message for the last error which occurred on file.
-   compressed file.  errnum is set to zlib error number.  If an error occurred
+   errnum is set to zlib error number.  If an error occurred in the file system
-   in the file system and not in the compression library, errnum is set to
+   and not in the compression library, errnum is set to Z_ERRNO and the
-   Z_ERRNO and the application may consult errno to get the exact error code.
+   application may consult errno to get the exact error code.
 
      The application must not modify the returned string.  Future calls to
    this function may invalidate the previously returned string.  If file is
@@ -1670,7 +1671,7 @@ ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
 
 ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
 /*
-     Clears the error and end-of-file flags for file.  This is analogous to the
+     Clear the error and end-of-file flags for file.  This is analogous to the
    clearerr() function in stdio.  This is useful for continuing to read a gzip
    file that is being written concurrently.
 */
@@ -1688,8 +1689,9 @@ ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
 ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
 /*
      Update a running Adler-32 checksum with the bytes buf[0..len-1] and
-   return the updated checksum.  If buf is Z_NULL, this function returns the
+   return the updated checksum. An Adler-32 value is in the range of a 32-bit
-   required initial value for the checksum.
+   unsigned integer. If buf is Z_NULL, this function returns the required
+   initial value for the checksum.
 
      An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed
    much faster.
@@ -1725,9 +1727,10 @@ ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
 ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
 /*
      Update a running CRC-32 with the bytes buf[0..len-1] and return the
-   updated CRC-32.  If buf is Z_NULL, this function returns the required
+   updated CRC-32. A CRC-32 value is in the range of a 32-bit unsigned integer.
-   initial value for the crc.  Pre- and post-conditioning (one's complement) is
+   If buf is Z_NULL, this function returns the required initial value for the
-   performed within this function so it shouldn't be done by the application.
+   crc. Pre- and post-conditioning (one's complement) is performed within this
+   function so it shouldn't be done by the application.
 
    Usage example:
 
@@ -1739,7 +1742,7 @@ ZEXTERN uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
      if (crc != original_crc) error();
 */
 
-ZEXTERN uLong ZEXPORT crc32_z OF((uLong adler, const Bytef *buf,
+ZEXTERN uLong ZEXPORT crc32_z OF((uLong crc, const Bytef *buf,
                                   z_size_t len));
 /*
      Same as crc32(), but with a size_t length.
@@ -1755,6 +1758,20 @@ ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
    len2.
 */
 
+/*
+ZEXTERN uLong ZEXPORT crc32_combine_gen OF((z_off_t len2));
+
+     Return the operator corresponding to length len2, to be used with
+   crc32_combine_op().
+*/
+
+ZEXTERN uLong ZEXPORT crc32_combine_op OF((uLong crc1, uLong crc2, uLong op));
+/*
+     Give the same result as crc32_combine(), using op in place of len2. op is
+   is generated from len2 by crc32_combine_gen(). This will be faster than
+   crc32_combine() if the generated op is used more than once.
+*/
+
 
                         /* various hacks, don't look :) */
 
@@ -1842,6 +1859,7 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));  /* backward compatibility */
    ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
    ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t));
    ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t));
+   ZEXTERN uLong ZEXPORT crc32_combine_gen64 OF((z_off64_t));
 #endif
 
 #if !defined(ZLIB_INTERNAL) && defined(Z_WANT64)
@@ -1852,6 +1870,7 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));  /* backward compatibility */
 #    define z_gzoffset z_gzoffset64
 #    define z_adler32_combine z_adler32_combine64
 #    define z_crc32_combine z_crc32_combine64
+#    define z_crc32_combine_gen z_crc32_combine_gen64
 #  else
 #    define gzopen gzopen64
 #    define gzseek gzseek64
@@ -1859,6 +1878,7 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));  /* backward compatibility */
 #    define gzoffset gzoffset64
 #    define adler32_combine adler32_combine64
 #    define crc32_combine crc32_combine64
+#    define crc32_combine_gen crc32_combine_gen64
 #  endif
 #  ifndef Z_LARGE64
      ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
@@ -1867,6 +1887,7 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));  /* backward compatibility */
      ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile));
      ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
      ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
+     ZEXTERN uLong ZEXPORT crc32_combine_gen64 OF((z_off_t));
 #  endif
 #else
    ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *));
@@ -1875,12 +1896,14 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));  /* backward compatibility */
    ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile));
    ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
    ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
+   ZEXTERN uLong ZEXPORT crc32_combine_gen OF((z_off_t));
 #endif
 
 #else /* Z_SOLO */
 
    ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
    ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
+   ZEXTERN uLong ZEXPORT crc32_combine_gen OF((z_off_t));
 
 #endif /* !Z_SOLO */
 
@@ -1893,7 +1916,7 @@ ZEXTERN int            ZEXPORT inflateValidate OF((z_streamp, int));
 ZEXTERN unsigned long  ZEXPORT inflateCodesUsed OF ((z_streamp));
 ZEXTERN int            ZEXPORT inflateResetKeep OF((z_streamp));
 ZEXTERN int            ZEXPORT deflateResetKeep OF((z_streamp));
-#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO)
+#if defined(_WIN32) && !defined(Z_SOLO)
 ZEXTERN gzFile         ZEXPORT gzopen_w OF((const wchar_t *path,
                                             const char *mode));
 #endif

thirdparty/zlib/zutil.c

@@ -136,8 +136,8 @@ const char * ZEXPORT zError(err)
     return ERR_MSG(err);
 }
 
-#if defined(_WIN32_WCE)
+#if defined(_WIN32_WCE) && _WIN32_WCE < 0x800
-    /* The Microsoft C Run-Time Library for Windows CE doesn't have
+    /* The older Microsoft C Run-Time Library for Windows CE doesn't have
      * errno.  We define it as a global variable to simplify porting.
      * Its value is always 0 and should not be used.
      */

thirdparty/zlib/zutil.h

@@ -1,5 +1,5 @@
 /* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2022 Jean-loup Gailly, Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -29,10 +29,6 @@
 #  include <stdlib.h>
 #endif
 
-#ifdef Z_SOLO
-   typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
-#endif
-
 #ifndef local
 #  define local static
 #endif
@@ -46,6 +42,17 @@ typedef unsigned short ush;
 typedef ush FAR ushf;
 typedef unsigned long  ulg;
 
+#if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)
+#  include <limits.h>
+#  if (ULONG_MAX == 0xffffffffffffffff)
+#    define Z_U8 unsigned long
+#  elif (ULLONG_MAX == 0xffffffffffffffff)
+#    define Z_U8 unsigned long long
+#  elif (UINT_MAX == 0xffffffffffffffff)
+#    define Z_U8 unsigned
+#  endif
+#endif
+
 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
 /* (size given to avoid silly warnings with Visual C++) */
 
@@ -170,10 +177,6 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
 #  if defined(_WIN32_WCE)
 #    define fdopen(fd,mode) NULL /* No fdopen() */
-#    ifndef _PTRDIFF_T_DEFINED
-       typedef int ptrdiff_t;
-#      define _PTRDIFF_T_DEFINED
-#    endif
 #  else
 #    define fdopen(fd,type)  _fdopen(fd,type)
 #  endif