Update zlib to 1.2.11

third_party/zlib/inflate.h

 /* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2009 Mark Adler
+ * Copyright (C) 1995-2016 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 /* WARNING: this file should *not* be used by applications. It is
    part of the implementation of the compression library and is
    subject to change. Applications should only use zlib.h.
  */
 
 /* define NO_GZIP when compiling if you want to disable gzip header and
    trailer decoding by inflate().  NO_GZIP would be used to avoid linking in
    the crc code when it is not needed.  For shared libraries, gzip decoding
    should be left enabled. */
 #ifndef NO_GZIP
 #  define GUNZIP
 #endif
 
 /* Possible inflate modes between inflate() calls */
 typedef enum {
-    HEAD,       /* i: waiting for magic header */
+    HEAD = 16180,   /* i: waiting for magic header */
     FLAGS,      /* i: waiting for method and flags (gzip) */
     TIME,       /* i: waiting for modification time (gzip) */
     OS,         /* i: waiting for extra flags and operating system (gzip) */
     EXLEN,      /* i: waiting for extra length (gzip) */
     EXTRA,      /* i: waiting for extra bytes (gzip) */
     NAME,       /* i: waiting for end of file name (gzip) */
     COMMENT,    /* i: waiting for end of comment (gzip) */
     HCRC,       /* i: waiting for header crc (gzip) */
     DICTID,     /* i: waiting for dictionary check value */
     DICT,       /* waiting for inflateSetDictionary() call */
@@ skipping 38 matching lines @@
             TABLE -> LENLENS -> CODELENS -> LEN_
             LEN_ -> LEN
     Read deflate codes in fixed or dynamic block:
                 LEN -> LENEXT or LIT or TYPE
                 LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
                 LIT -> LEN
     Process trailer:
         CHECK -> LENGTH -> DONE
  */
 
-/* state maintained between inflate() calls.  Approximately 10K bytes. */
+/* State maintained between inflate() calls -- approximately 7K bytes, not
+   including the allocated sliding window, which is up to 32K bytes. */
 struct inflate_state {
+    z_streamp strm;             /* pointer back to this zlib stream */
     inflate_mode mode;          /* current inflate mode */
     int last;                   /* true if processing last block */
-    int wrap;                   /* bit 0 true for zlib, bit 1 true for gzip */
+    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) */
     unsigned dmax;              /* zlib header max distance (INFLATE_STRICT) */
     unsigned long check;        /* protected copy of check value */
     unsigned long total;        /* protected copy of output count */
     gz_headerp head;            /* where to save gzip header information */
         /* sliding window */
     unsigned wbits;             /* log base 2 of requested window size */
     unsigned wsize;             /* window size or zero if not using window */
     unsigned whave;             /* valid bytes in the window */
@@ skipping 18 matching lines @@
     unsigned ndist;             /* number of distance code lengths */
     unsigned have;              /* number of code lengths in lens[] */
     code FAR *next;             /* next available space in codes[] */
     unsigned short lens[320];   /* temporary storage for code lengths */
     unsigned short work[288];   /* work area for code table building */
     code codes[ENOUGH];         /* space for code tables */
     int sane;                   /* if false, allow invalid distance too far */
     int back;                   /* bits back of last unprocessed length/lit */
     unsigned was;               /* initial length of match */
 };