1 files changed, 3 insertions, 2 deletions
diff --git a/src/Common/zlib/inflate.h b/src/Common/zlib/inflate.h
index a46cce6b..f127b6b1 100644
--- a/src/Common/zlib/inflate.h
+++ b/src/Common/zlib/inflate.h
@@ -1,37 +1,37 @@
 /* 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
  */
 
 /* 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 = 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 */
         TYPE,       /* i: waiting for type bits, including last-flag bit */
         TYPEDO,     /* i: same, but skip check to exit inflate on new block */
         STORED,     /* i: waiting for stored size (length and complement) */
         COPY_,      /* i/o: same as COPY below, but only first time in */
         COPY,       /* i/o: waiting for input or output to copy stored block */
         TABLE,      /* i: waiting for dynamic block table lengths */
@@ -54,71 +54,72 @@ typedef enum {
 
 /*
     State transitions between above modes -
 
     (most modes can go to BAD or MEM on error -- not shown for clarity)
 
     Process header:
         HEAD -> (gzip) or (zlib) or (raw)
         (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME -> COMMENT ->
                   HCRC -> TYPE
         (zlib) -> DICTID or TYPE
         DICTID -> DICT -> TYPE
         (raw) -> TYPEDO
     Read deflate blocks:
             TYPE -> TYPEDO -> STORED or TABLE or LEN_ or CHECK
             STORED -> COPY_ -> COPY -> TYPE
             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 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,
                                    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 */
     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 */
     unsigned wnext;             /* window write index */
     unsigned char FAR *window;  /* allocated sliding window, if needed */
         /* bit accumulator */
     unsigned long hold;         /* input bit accumulator */
     unsigned bits;              /* number of bits in "in" */
         /* for string and stored block copying */
     unsigned length;            /* literal or length of data to copy */
     unsigned offset;            /* distance back to copy string from */
         /* for table and code decoding */
     unsigned extra;             /* extra bits needed */
         /* fixed and dynamic code tables */
     code const FAR *lencode;    /* starting table for length/literal codes */
     code const FAR *distcode;   /* starting table for distance codes */
     unsigned lenbits;           /* index bits for lencode */
     unsigned distbits;          /* index bits for distcode */
         /* dynamic table building */
     unsigned ncode;             /* number of code length code lengths */
     unsigned nlen;              /* number of length code lengths */
     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 */