Merge #5945

5945: Update zlib to version 1.2.13 r=heinrich5991 a=Robyt3

Release notes: https://github.com/madler/zlib/releases/tag/v1.2.13

## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test (especially base/) or added coverage to integration test
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: Robert Müller <robytemueller@gmail.com>

src/engine/external/zlib/VERSION.txt

@@ -1 +1 @@
-1.2.12
+1.2.13

src/engine/external/zlib/crc32.c

@@ -98,13 +98,22 @@
 #  endif
 #endif
 
+/* If available, use the ARM processor CRC32 instruction. */
+#if defined(__aarch64__) && defined(__ARM_FEATURE_CRC32) && W == 8
+#  define ARMCRC32
+#endif
+
 /* Local functions. */
 local z_crc_t multmodp OF((z_crc_t a, z_crc_t b));
 local z_crc_t x2nmodp OF((z_off64_t n, unsigned k));
 
-/* If available, use the ARM processor CRC32 instruction. */
+#if defined(W) && (!defined(ARMCRC32) || defined(DYNAMIC_CRC_TABLE))
-#if defined(__aarch64__) && defined(__ARM_FEATURE_CRC32) && W == 8
+    local z_word_t byte_swap OF((z_word_t word));
-#  define ARMCRC32
+#endif
+
+#if defined(W) && !defined(ARMCRC32)
+    local z_crc_t crc_word OF((z_word_t data));
+    local z_word_t crc_word_big OF((z_word_t data));
 #endif
 
 #if defined(W) && (!defined(ARMCRC32) || defined(DYNAMIC_CRC_TABLE))
@@ -630,7 +639,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
 #endif /* DYNAMIC_CRC_TABLE */
 
     /* Pre-condition the CRC */
-    crc ^= 0xffffffff;
+    crc = (~crc) & 0xffffffff;
 
     /* Compute the CRC up to a word boundary. */
     while (len && ((z_size_t)buf & 7) != 0) {
@@ -645,8 +654,8 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
     len &= 7;
 
     /* Do three interleaved CRCs to realize the throughput of one crc32x
-       instruction per cycle. Each CRC is calcuated on Z_BATCH words. The three
+       instruction per cycle. Each CRC is calculated on Z_BATCH words. The
-       CRCs are combined into a single CRC after each set of batches. */
+       three CRCs are combined into a single CRC after each set of batches. */
     while (num >= 3 * Z_BATCH) {
         crc1 = 0;
         crc2 = 0;
@@ -749,7 +758,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
 #endif /* DYNAMIC_CRC_TABLE */
 
     /* Pre-condition the CRC */
-    crc ^= 0xffffffff;
+    crc = (~crc) & 0xffffffff;
 
 #ifdef W
 
@@ -1077,7 +1086,7 @@ uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
 #ifdef DYNAMIC_CRC_TABLE
     once(&made, make_crc_table);
 #endif /* DYNAMIC_CRC_TABLE */
-    return multmodp(x2nmodp(len2, 3), crc1) ^ crc2;
+    return multmodp(x2nmodp(len2, 3), crc1) ^ (crc2 & 0xffffffff);
 }
 
 /* ========================================================================= */
@@ -1086,7 +1095,7 @@ uLong ZEXPORT crc32_combine(crc1, crc2, len2)
     uLong crc2;
     z_off_t len2;
 {
-    return crc32_combine64(crc1, crc2, len2);
+    return crc32_combine64(crc1, crc2, (z_off64_t)len2);
 }
 
 /* ========================================================================= */
@@ -1103,14 +1112,14 @@ uLong ZEXPORT crc32_combine_gen64(len2)
 uLong ZEXPORT crc32_combine_gen(len2)
     z_off_t len2;
 {
-    return crc32_combine_gen64(len2);
+    return crc32_combine_gen64((z_off64_t)len2);
 }
 
 /* ========================================================================= */
-uLong crc32_combine_op(crc1, crc2, op)
+uLong ZEXPORT crc32_combine_op(crc1, crc2, op)
     uLong crc1;
     uLong crc2;
     uLong op;
 {
-    return multmodp(op, crc1) ^ crc2;
+    return multmodp(op, crc1) ^ (crc2 & 0xffffffff);
 }

src/engine/external/zlib/deflate.c

@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.2.12 Copyright 1995-2022 Jean-loup Gailly and Mark Adler ";
+   " deflate 1.2.13 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
@@ -87,13 +87,7 @@ local void lm_init        OF((deflate_state *s));
 local void putShortMSB    OF((deflate_state *s, uInt b));
 local void flush_pending  OF((z_streamp strm));
 local unsigned read_buf   OF((z_streamp strm, Bytef *buf, unsigned size));
-#ifdef ASMV
-#  pragma message("Assembler code may have bugs -- use at your own risk")
-      void match_init OF((void)); /* asm code initialization */
-      uInt longest_match  OF((deflate_state *s, IPos cur_match));
-#else
 local uInt longest_match  OF((deflate_state *s, IPos cur_match));
-#endif
 
 #ifdef ZLIB_DEBUG
 local  void check_match OF((deflate_state *s, IPos start, IPos match,
@@ -285,6 +279,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 
     if (windowBits < 0) { /* suppress zlib wrapper */
         wrap = 0;
+        if (windowBits < -15)
+            return Z_STREAM_ERROR;
         windowBits = -windowBits;
     }
 #ifdef GZIP
@@ -674,36 +670,50 @@ int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
 }
 
 /* =========================================================================
- * For the default windowBits of 15 and memLevel of 8, this function returns
+ * For the default windowBits of 15 and memLevel of 8, this function returns a
- * a close to exact, as well as small, upper bound on the compressed size.
+ * close to exact, as well as small, upper bound on the compressed size. This
- * They are coded as constants here for a reason--if the #define's are
+ * is an expansion of ~0.03%, plus a small constant.
- * changed, then this function needs to be changed as well.  The return
- * value for 15 and 8 only works for those exact settings.
  *
- * For any setting other than those defaults for windowBits and memLevel,
+ * For any setting other than those defaults for windowBits and memLevel, one
- * the value returned is a conservative worst case for the maximum expansion
+ * of two worst case bounds is returned. This is at most an expansion of ~4% or
- * resulting from using fixed blocks instead of stored blocks, which deflate
+ * ~13%, plus a small constant.
- * can emit on compressed data for some combinations of the parameters.
  *
- * This function could be more sophisticated to provide closer upper bounds for
+ * Both the 0.03% and 4% derive from the overhead of stored blocks. The first
- * every combination of windowBits and memLevel.  But even the conservative
+ * one is for stored blocks of 16383 bytes (memLevel == 8), whereas the second
- * upper bound of about 14% expansion does not seem onerous for output buffer
+ * is for stored blocks of 127 bytes (the worst case memLevel == 1). The
- * allocation.
+ * expansion results from five bytes of header for each stored block.
+ *
+ * The larger expansion of 13% results from a window size less than or equal to
+ * the symbols buffer size (windowBits <= memLevel + 7). In that case some of
+ * the data being compressed may have slid out of the sliding window, impeding
+ * a stored block from being emitted. Then the only choice is a fixed or
+ * dynamic block, where a fixed block limits the maximum expansion to 9 bits
+ * per 8-bit byte, plus 10 bits for every block. The smallest block size for
+ * which this can occur is 255 (memLevel == 2).
+ *
+ * Shifts are used to approximate divisions, for speed.
  */
 uLong ZEXPORT deflateBound(strm, sourceLen)
     z_streamp strm;
     uLong sourceLen;
 {
     deflate_state *s;
-    uLong complen, wraplen;
+    uLong fixedlen, storelen, wraplen;
 
-    /* conservative upper bound for compressed data */
+    /* upper bound for fixed blocks with 9-bit literals and length 255
-    complen = sourceLen +
+       (memLevel == 2, which is the lowest that may not use stored blocks) --
-              ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 5;
+       ~13% overhead plus a small constant */
+    fixedlen = sourceLen + (sourceLen >> 3) + (sourceLen >> 8) +
+               (sourceLen >> 9) + 4;
 
-    /* if can't get parameters, return conservative bound plus zlib wrapper */
+    /* upper bound for stored blocks with length 127 (memLevel == 1) --
+       ~4% overhead plus a small constant */
+    storelen = sourceLen + (sourceLen >> 5) + (sourceLen >> 7) +
+               (sourceLen >> 11) + 7;
+
+    /* if can't get parameters, return larger bound plus a zlib wrapper */
     if (deflateStateCheck(strm))
-        return complen + 6;
+        return (fixedlen > storelen ? fixedlen : storelen) + 6;
 
     /* compute wrapper length */
     s = strm->state;
@@ -740,11 +750,12 @@ uLong ZEXPORT deflateBound(strm, sourceLen)
         wraplen = 6;
     }
 
-    /* if not default parameters, return conservative bound */
+    /* if not default parameters, return one of the conservative bounds */
     if (s->w_bits != 15 || s->hash_bits != 8 + 7)
-        return complen + wraplen;
+        return (s->w_bits <= s->hash_bits ? fixedlen : storelen) + wraplen;
 
-    /* default settings: return tight bound for that case */
+    /* default settings: return tight bound for that case -- ~0.03% overhead
+       plus a small constant */
     return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
            (sourceLen >> 25) + 13 - 6 + wraplen;
 }
@@ -1252,11 +1263,6 @@ local void lm_init (s)
     s->match_length = s->prev_length = MIN_MATCH-1;
     s->match_available = 0;
     s->ins_h = 0;
-#ifndef FASTEST
-#ifdef ASMV
-    match_init(); /* initialize the asm code */
-#endif
-#endif
 }
 
 #ifndef FASTEST
@@ -1269,10 +1275,6 @@ local void lm_init (s)
  *   string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
  * OUT assertion: the match length is not greater than s->lookahead.
  */
-#ifndef ASMV
-/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
- * match.S. The code will be functionally equivalent.
- */
 local uInt longest_match(s, cur_match)
     deflate_state *s;
     IPos cur_match;                             /* current match */
@@ -1318,7 +1320,8 @@ local uInt longest_match(s, cur_match)
      */
     if ((uInt)nice_match > s->lookahead) nice_match = (int)s->lookahead;
 
-    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+    Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
+           "need lookahead");
 
     do {
         Assert(cur_match < s->strstart, "no future");
@@ -1342,7 +1345,7 @@ local uInt longest_match(s, cur_match)
         /* It is not necessary to compare scan[2] and match[2] since they are
          * always equal when the other bytes match, given that the hash keys
          * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
-         * strstart+3, +5, ... up to strstart+257. We check for insufficient
+         * strstart + 3, + 5, up to strstart + 257. We check for insufficient
          * lookahead only every 4th comparison; the 128th check will be made
          * at strstart + 257. If MAX_MATCH-2 is not a multiple of 8, it is
          * necessary to put more guard bytes at the end of the window, or
@@ -1359,7 +1362,8 @@ local uInt longest_match(s, cur_match)
         /* The funny "do {}" generates better code on most compilers */
 
         /* Here, scan <= window + strstart + 257 */
-        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+        Assert(scan <= s->window + (unsigned)(s->window_size - 1),
+               "wild scan");
         if (*scan == *match) scan++;
 
         len = (MAX_MATCH - 1) - (int)(strend - scan);
@@ -1391,7 +1395,8 @@ local uInt longest_match(s, cur_match)
                  *++scan == *++match && *++scan == *++match &&
                  scan < strend);
 
-        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+        Assert(scan <= s->window + (unsigned)(s->window_size - 1),
+               "wild scan");
 
         len = MAX_MATCH - (int)(strend - scan);
         scan = strend - MAX_MATCH;
@@ -1415,7 +1420,6 @@ local uInt longest_match(s, cur_match)
     if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
     return s->lookahead;
 }
-#endif /* ASMV */
 
 #else /* FASTEST */
 
@@ -1436,7 +1440,8 @@ local uInt longest_match(s, cur_match)
      */
     Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
 
-    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+    Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
+           "need lookahead");
 
     Assert(cur_match < s->strstart, "no future");
 
@@ -1680,7 +1685,7 @@ local void fill_window(s)
  *
  * deflate_stored() is written to minimize the number of times an input byte is
  * copied. It is most efficient with large input and output buffers, which
- * maximizes the opportunites to have a single copy from next_in to next_out.
+ * maximizes the opportunities to have a single copy from next_in to next_out.
  */
 local block_state deflate_stored(s, flush)
     deflate_state *s;
@@ -2140,7 +2145,8 @@ local block_state deflate_rle(s, flush)
                 if (s->match_length > s->lookahead)
                     s->match_length = s->lookahead;
             }
-            Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");
+            Assert(scan <= s->window + (uInt)(s->window_size - 1),
+                   "wild scan");
         }
 
         /* Emit match if have run of MIN_MATCH or longer, else emit literal */

src/engine/external/zlib/deflate.h

@@ -329,8 +329,8 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
 # define _tr_tally_dist(s, distance, length, flush) \
   { uch len = (uch)(length); \
     ush dist = (ush)(distance); \
-    s->sym_buf[s->sym_next++] = dist; \
+    s->sym_buf[s->sym_next++] = (uch)dist; \
-    s->sym_buf[s->sym_next++] = dist >> 8; \
+    s->sym_buf[s->sym_next++] = (uch)(dist >> 8); \
     s->sym_buf[s->sym_next++] = len; \
     dist--; \
     s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \

src/engine/external/zlib/gzread.c

@@ -157,11 +157,9 @@ local int gz_look(state)
        the output buffer is larger than the input buffer, which also assures
        space for gzungetc() */
     state->x.next = state->out;
-    if (strm->avail_in) {
     memcpy(state->x.next, strm->next_in, strm->avail_in);
     state->x.have = strm->avail_in;
     strm->avail_in = 0;
-    }
     state->how = COPY;
     state->direct = 1;
     return 0;

src/engine/external/zlib/infback.c

@@ -66,6 +66,7 @@ int stream_size;
     state->window = window;
     state->wnext = 0;
     state->whave = 0;
+    state->sane = 1;
     return Z_OK;
 }
 
@@ -605,25 +606,27 @@ void FAR *out_desc;
             break;
 
         case DONE:
-            /* inflate stream terminated properly -- write leftover output */
+            /* inflate stream terminated properly */
             ret = Z_STREAM_END;
-            if (left < state->wsize) {
-                if (out(out_desc, state->window, state->wsize - left))
-                    ret = Z_BUF_ERROR;
-            }
             goto inf_leave;
 
         case BAD:
             ret = Z_DATA_ERROR;
             goto inf_leave;
 
-        default:                /* can't happen, but makes compilers happy */
+        default:
+            /* can't happen, but makes compilers happy */
             ret = Z_STREAM_ERROR;
             goto inf_leave;
         }
 
-    /* Return unused input */
+    /* Write leftover output and return unused input */
   inf_leave:
+    if (left < state->wsize) {
+        if (out(out_desc, state->window, state->wsize - left) &&
+            ret == Z_STREAM_END)
+            ret = Z_BUF_ERROR;
+    }
     strm->next_in = next;
     strm->avail_in = have;
     return ret;

src/engine/external/zlib/inflate.c

@@ -168,6 +168,8 @@ int windowBits;
 
     /* extract wrap request from windowBits parameter */
     if (windowBits < 0) {
+        if (windowBits < -15)
+            return Z_STREAM_ERROR;
         wrap = 0;
         windowBits = -windowBits;
     }
@@ -764,8 +766,9 @@ int flush;
                 if (copy > have) copy = have;
                 if (copy) {
                     if (state->head != Z_NULL &&
-                        state->head->extra != Z_NULL) {
+                        state->head->extra != Z_NULL &&
-                        len = state->head->extra_len - state->length;
+                        (len = state->head->extra_len - state->length) <
+                            state->head->extra_max) {
                         zmemcpy(state->head->extra + len, next,
                                 len + copy > state->head->extra_max ?
                                 state->head->extra_max - len : copy);

src/engine/external/zlib/inftrees.c

@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate_copyright[] =
-   " inflate 1.2.12 Copyright 1995-2022 Mark Adler ";
+   " inflate 1.2.13 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, 199, 202};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 194, 65};
     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,

src/engine/external/zlib/inftrees.h

@@ -38,7 +38,7 @@ typedef struct {
 /* Maximum size of the dynamic table.  The maximum number of code structures is
    1444, which is the sum of 852 for literal/length codes and 592 for distance
    codes.  These values were found by exhaustive searches using the program
-   examples/enough.c found in the zlib distribtution.  The arguments to that
+   examples/enough.c found in the zlib distribution.  The arguments to that
    program are the number of symbols, the initial root table size, and the
    maximum bit length of a code.  "enough 286 9 15" for literal/length codes
    returns returns 852, and "enough 30 6 15" for distance codes returns 592.

src/engine/external/zlib/trees.c

@@ -312,7 +312,7 @@ local void tr_static_init()
 }
 
 /* ===========================================================================
- * Genererate the file trees.h describing the static trees.
+ * Generate the file trees.h describing the static trees.
  */
 #ifdef GEN_TREES_H
 #  ifndef ZLIB_DEBUG
@@ -807,8 +807,8 @@ local int build_bl_tree(s)
 
     /* Build the bit length tree: */
     build_tree(s, (tree_desc *)(&(s->bl_desc)));
-    /* opt_len now includes the length of the tree representations, except
+    /* opt_len now includes the length of the tree representations, except the
-     * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
+     * lengths of the bit lengths codes and the 5 + 5 + 4 bits for the counts.
      */
 
     /* Determine the number of bit length codes to send. The pkzip format
@@ -950,7 +950,10 @@ void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
                 opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
                 s->sym_next / 3));
 
-        if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
+#ifndef FORCE_STATIC
+        if (static_lenb <= opt_lenb || s->strategy == Z_FIXED)
+#endif
+            opt_lenb = static_lenb;
 
     } else {
         Assert(buf != (char*)0, "lost buf");
@@ -971,11 +974,7 @@ void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
          */
         _tr_stored_block(s, buf, stored_len, last);
 
-#ifdef FORCE_STATIC
+    } else if (static_lenb == opt_lenb) {
-    } else if (static_lenb >= 0) { /* force static trees */
-#else
-    } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
-#endif
         send_bits(s, (STATIC_TREES<<1) + last, 3);
         compress_block(s, (const ct_data *)static_ltree,
                        (const ct_data *)static_dtree);
@@ -1015,11 +1014,11 @@ void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
 int ZLIB_INTERNAL _tr_tally(s, dist, lc)
     deflate_state *s;
     unsigned dist;  /* distance of matched string */
-    unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
+    unsigned lc;    /* match length - MIN_MATCH or unmatched char (dist==0) */
 {
-    s->sym_buf[s->sym_next++] = dist;
+    s->sym_buf[s->sym_next++] = (uch)dist;
-    s->sym_buf[s->sym_next++] = dist >> 8;
+    s->sym_buf[s->sym_next++] = (uch)(dist >> 8);
-    s->sym_buf[s->sym_next++] = lc;
+    s->sym_buf[s->sym_next++] = (uch)lc;
     if (dist == 0) {
         /* lc is the unmatched char */
         s->dyn_ltree[lc].Freq++;
@@ -1061,7 +1060,7 @@ local void compress_block(s, ltree, dtree)
         } else {
             /* Here, lc is the match length - MIN_MATCH */
             code = _length_code[lc];
-            send_code(s, code+LITERALS+1, ltree); /* send the length code */
+            send_code(s, code + LITERALS + 1, ltree);   /* send length code */
             extra = extra_lbits[code];
             if (extra != 0) {
                 lc -= base_length[code];

src/engine/external/zlib/zconf.h

@@ -38,6 +38,9 @@
 #  define crc32                 z_crc32
 #  define crc32_combine         z_crc32_combine
 #  define crc32_combine64       z_crc32_combine64
+#  define crc32_combine_gen     z_crc32_combine_gen
+#  define crc32_combine_gen64   z_crc32_combine_gen64
+#  define crc32_combine_op      z_crc32_combine_op
 #  define crc32_z               z_crc32_z
 #  define deflate               z_deflate
 #  define deflateBound          z_deflateBound
@@ -349,6 +352,9 @@
 #    ifdef FAR
 #      undef FAR
 #    endif
+#    ifndef WIN32_LEAN_AND_MEAN
+#      define WIN32_LEAN_AND_MEAN
+#    endif
 #    include <windows.h>
      /* No need for _export, use ZLIB.DEF instead. */
      /* For complete Windows compatibility, use WINAPI, not __stdcall. */
@@ -467,11 +473,18 @@ typedef uLong FAR uLongf;
 #  undef _LARGEFILE64_SOURCE
 #endif
 
-#if defined(__WATCOMC__) && !defined(Z_HAVE_UNISTD_H)
+#ifndef Z_HAVE_UNISTD_H
+#  ifdef __WATCOMC__
 #    define Z_HAVE_UNISTD_H
 #  endif
+#endif
+#ifndef Z_HAVE_UNISTD_H
+#  if defined(_LARGEFILE64_SOURCE) && !defined(_WIN32)
+#    define Z_HAVE_UNISTD_H
+#  endif
+#endif
 #ifndef Z_SOLO
-#  if defined(Z_HAVE_UNISTD_H) || defined(_LARGEFILE64_SOURCE)
+#  if defined(Z_HAVE_UNISTD_H)
 #    include <unistd.h>         /* for SEEK_*, off_t, and _LFS64_LARGEFILE */
 #    ifdef VMS
 #      include <unixio.h>       /* for off_t */

src/engine/external/zlib/zlib.h

@@ -1,5 +1,5 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.2.12, March 11th, 2022
+  version 1.2.13, October 13th, 2022
 
   Copyright (C) 1995-2022 Jean-loup Gailly and Mark Adler
 
@@ -37,11 +37,11 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.2.12"
+#define ZLIB_VERSION "1.2.13"
-#define ZLIB_VERNUM 0x12c0
+#define ZLIB_VERNUM 0x12d0
 #define ZLIB_VER_MAJOR 1
 #define ZLIB_VER_MINOR 2
-#define ZLIB_VER_REVISION 12
+#define ZLIB_VER_REVISION 13
 #define ZLIB_VER_SUBREVISION 0
 
 /*
@@ -276,7 +276,7 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
   == 0), or after each call of deflate().  If deflate returns Z_OK and with
   zero avail_out, it must be called again after making room in the output
   buffer because there might be more output pending. See deflatePending(),
-  which can be used if desired to determine whether or not there is more ouput
+  which can be used if desired to determine whether or not there is more output
   in that case.
 
     Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
@@ -660,7 +660,7 @@ ZEXTERN int ZEXPORT deflateGetDictionary OF((z_streamp strm,
    to dictionary.  dictionary must have enough space, where 32768 bytes is
    always enough.  If deflateGetDictionary() is called with dictionary equal to
    Z_NULL, then only the dictionary length is returned, and nothing is copied.
-   Similary, if dictLength is Z_NULL, then it is not set.
+   Similarly, if dictLength is Z_NULL, then it is not set.
 
      deflateGetDictionary() may return a length less than the window size, even
    when more than the window size in input has been provided. It may return up
@@ -915,7 +915,7 @@ ZEXTERN int ZEXPORT inflateGetDictionary OF((z_streamp strm,
    to dictionary.  dictionary must have enough space, where 32768 bytes is
    always enough.  If inflateGetDictionary() is called with dictionary equal to
    Z_NULL, then only the dictionary length is returned, and nothing is copied.
-   Similary, if dictLength is Z_NULL, then it is not set.
+   Similarly, if dictLength is Z_NULL, then it is not set.
 
      inflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the
    stream state is inconsistent.
@@ -1437,12 +1437,12 @@ ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems,
 
      In the event that the end of file is reached and only a partial item is
    available at the end, i.e. the remaining uncompressed data length is not a
-   multiple of size, then the final partial item is nevetheless read into buf
+   multiple of size, then the final partial item is nevertheless read into buf
    and the end-of-file flag is set.  The length of the partial item read is not
    provided, but could be inferred from the result of gztell().  This behavior
    is the same as the behavior of fread() implementations in common libraries,
    but it prevents the direct use of gzfread() to read a concurrently written
-   file, reseting and retrying on end-of-file, when size is not 1.
+   file, resetting and retrying on end-of-file, when size is not 1.
 */
 
 ZEXTERN int ZEXPORT gzwrite OF((gzFile file, voidpc buf, unsigned len));

src/engine/external/zlib/zutil.c

@@ -61,9 +61,11 @@ uLong ZEXPORT zlibCompileFlags()
 #ifdef ZLIB_DEBUG
     flags += 1 << 8;
 #endif
+    /*
 #if defined(ASMV) || defined(ASMINF)
     flags += 1 << 9;
 #endif
+     */
 #ifdef ZLIB_WINAPI
     flags += 1 << 10;
 #endif

src/engine/external/zlib/zutil.h

@@ -193,6 +193,7 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
     (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
     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
 
         /* common defaults */