diff --git a/lib/libz/adler32.c b/lib/libz/adler32.c
index 624a1696eb03..007ba26277c8 100644
--- a/lib/libz/adler32.c
+++ b/lib/libz/adler32.c
@@ -1,5 +1,5 @@
 /* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -12,12 +12,13 @@
 #define NMAX 5552
 /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
 
-#define DO1(buf,i)  {s1 += buf[i]; s2 += s1;}
+#define DO1(buf,i)  {adler += (buf)[i]; sum2 += adler;}
 #define DO2(buf,i)  DO1(buf,i); DO1(buf,i+1);
 #define DO4(buf,i)  DO2(buf,i); DO2(buf,i+2);
 #define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
 #define DO16(buf)   DO8(buf,0); DO8(buf,8);
 
+/* use NO_DIVIDE if your processor does not do division in hardware */
 #ifdef NO_DIVIDE
 #  define MOD(a) \
     do { \
@@ -39,8 +40,17 @@
         if (a >= (BASE << 1)) a -= (BASE << 1); \
         if (a >= BASE) a -= BASE; \
     } while (0)
+#  define MOD4(a) \
+    do { \
+        if (a >= (BASE << 4)) a -= (BASE << 4); \
+        if (a >= (BASE << 3)) a -= (BASE << 3); \
+        if (a >= (BASE << 2)) a -= (BASE << 2); \
+        if (a >= (BASE << 1)) a -= (BASE << 1); \
+        if (a >= BASE) a -= BASE; \
+    } while (0)
 #else
 #  define MOD(a) a %= BASE
+#  define MOD4(a) a %= BASE
 #endif
 
 /* ========================================================================= */
@@ -49,26 +59,91 @@ uLong ZEXPORT adler32(adler, buf, len)
     const Bytef *buf;
     uInt len;
 {
-    unsigned long s1 = adler & 0xffff;
-    unsigned long s2 = (adler >> 16) & 0xffff;
-    int k;
+    unsigned long sum2;
+    unsigned n;
 
-    if (buf == Z_NULL) return 1L;
+    /* split Adler-32 into component sums */
+    sum2 = (adler >> 16) & 0xffff;
+    adler &= 0xffff;
 
-    while (len > 0) {
-        k = len < NMAX ? (int)len : NMAX;
-        len -= k;
-        while (k >= 16) {
+    /* in case user likes doing a byte at a time, keep it fast */
+    if (len == 1) {
+        adler += buf[0];
+        if (adler >= BASE)
+            adler -= BASE;
+        sum2 += adler;
+        if (sum2 >= BASE)
+            sum2 -= BASE;
+        return adler | (sum2 << 16);
+    }
+
+    /* initial Adler-32 value (deferred check for len == 1 speed) */
+    if (buf == Z_NULL)
+        return 1L;
+
+    /* in case short lengths are provided, keep it somewhat fast */
+    if (len < 16) {
+        while (len--) {
+            adler += *buf++;
+            sum2 += adler;
+        }
+        if (adler >= BASE)
+            adler -= BASE;
+        MOD4(sum2);             /* only added so many BASE's */
+        return adler | (sum2 << 16);
+    }
+
+    /* do length NMAX blocks -- requires just one modulo operation */
+    while (len >= NMAX) {
+        len -= NMAX;
+        n = NMAX / 16;          /* NMAX is divisible by 16 */
+        do {
+            DO16(buf);          /* 16 sums unrolled */
+            buf += 16;
+        } while (--n);
+        MOD(adler);
+        MOD(sum2);
+    }
+
+    /* do remaining bytes (less than NMAX, still just one modulo) */
+    if (len) {                  /* avoid modulos if none remaining */
+        while (len >= 16) {
+            len -= 16;
             DO16(buf);
             buf += 16;
-            k -= 16;
         }
-        if (k != 0) do {
-            s1 += *buf++;
-            s2 += s1;
-        } while (--k);
-        MOD(s1);
-        MOD(s2);
+        while (len--) {
+            adler += *buf++;
+            sum2 += adler;
+        }
+        MOD(adler);
+        MOD(sum2);
     }
-    return (s2 << 16) | s1;
+
+    /* return recombined sums */
+    return adler | (sum2 << 16);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT adler32_combine(adler1, adler2, len2)
+    uLong adler1;
+    uLong adler2;
+    z_off_t len2;
+{
+    unsigned long sum1;
+    unsigned long sum2;
+    unsigned rem;
+
+    /* the derivation of this formula is left as an exercise for the reader */
+    rem = (unsigned)(len2 % BASE);
+    sum1 = adler1 & 0xffff;
+    sum2 = rem * sum1;
+    MOD(sum2);
+    sum1 += (adler2 & 0xffff) + BASE - 1;
+    sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
+    if (sum1 > BASE) sum1 -= BASE;
+    if (sum1 > BASE) sum1 -= BASE;
+    if (sum2 > (BASE << 1)) sum2 -= (BASE << 1);
+    if (sum2 > BASE) sum2 -= BASE;
+    return sum1 | (sum2 << 16);
 }
diff --git a/lib/libz/compress.c b/lib/libz/compress.c
index 24ef02919110..df04f0148e6d 100644
--- a/lib/libz/compress.c
+++ b/lib/libz/compress.c
@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
diff --git a/lib/libz/crc32.c b/lib/libz/crc32.c
index b39c7e1253e1..f658a9ef55ee 100644
--- a/lib/libz/crc32.c
+++ b/lib/libz/crc32.c
@@ -1,12 +1,12 @@
 /* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2005 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
  * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
  * tables for updating the shift register in one step with three exclusive-ors
- * instead of four steps with four exclusive-ors.  This results about a factor
- * of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
+ * instead of four steps with four exclusive-ors.  This results in about a
+ * factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
  */
 
 /* @(#) $Id$ */
@@ -64,6 +64,11 @@
 #  define TBLS 1
 #endif /* BYFOUR */
 
+/* Local functions for crc concatenation */
+local unsigned long gf2_matrix_times OF((unsigned long *mat,
+                                         unsigned long vec));
+local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
+
 #ifdef DYNAMIC_CRC_TABLE
 
 local volatile int crc_table_empty = 1;
@@ -72,7 +77,6 @@ local void make_crc_table OF((void));
 #ifdef MAKECRCH
    local void write_table OF((FILE *, const unsigned long FAR *));
 #endif /* MAKECRCH */
-
 /*
   Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
   x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
@@ -270,7 +274,7 @@ local unsigned long crc32_little(crc, buf, len)
         len--;
     }
 
-    buf4 = (const u4 FAR *)buf;
+    buf4 = (const u4 FAR *)(const void FAR *)buf;
     while (len >= 32) {
         DOLIT32;
         len -= 32;
@@ -310,7 +314,7 @@ local unsigned long crc32_big(crc, buf, len)
         len--;
     }
 
-    buf4 = (const u4 FAR *)buf;
+    buf4 = (const u4 FAR *)(const void FAR *)buf;
     buf4--;
     while (len >= 32) {
         DOBIG32;
@@ -331,3 +335,89 @@ local unsigned long crc32_big(crc, buf, len)
 }
 
 #endif /* BYFOUR */
+
+#define GF2_DIM 32      /* dimension of GF(2) vectors (length of CRC) */
+
+/* ========================================================================= */
+local unsigned long gf2_matrix_times(mat, vec)
+    unsigned long *mat;
+    unsigned long vec;
+{
+    unsigned long sum;
+
+    sum = 0;
+    while (vec) {
+        if (vec & 1)
+            sum ^= *mat;
+        vec >>= 1;
+        mat++;
+    }
+    return sum;
+}
+
+/* ========================================================================= */
+local void gf2_matrix_square(square, mat)
+    unsigned long *square;
+    unsigned long *mat;
+{
+    int n;
+
+    for (n = 0; n < GF2_DIM; n++)
+        square[n] = gf2_matrix_times(mat, mat[n]);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT crc32_combine(crc1, crc2, len2)
+    uLong crc1;
+    uLong crc2;
+    z_off_t len2;
+{
+    int n;
+    unsigned long row;
+    unsigned long even[GF2_DIM];    /* even-power-of-two zeros operator */
+    unsigned long odd[GF2_DIM];     /* odd-power-of-two zeros operator */
+
+    /* degenerate case */
+    if (len2 == 0)
+        return crc1;
+
+    /* put operator for one zero bit in odd */
+    odd[0] = 0xedb88320L;           /* CRC-32 polynomial */
+    row = 1;
+    for (n = 1; n < GF2_DIM; n++) {
+        odd[n] = row;
+        row <<= 1;
+    }
+
+    /* put operator for two zero bits in even */
+    gf2_matrix_square(even, odd);
+
+    /* put operator for four zero bits in odd */
+    gf2_matrix_square(odd, even);
+
+    /* apply len2 zeros to crc1 (first square will put the operator for one
+       zero byte, eight zero bits, in even) */
+    do {
+        /* apply zeros operator for this bit of len2 */
+        gf2_matrix_square(even, odd);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(even, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+        if (len2 == 0)
+            break;
+
+        /* another iteration of the loop with odd and even swapped */
+        gf2_matrix_square(odd, even);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(odd, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+    } while (len2 != 0);
+
+    /* return combined crc */
+    crc1 ^= crc2;
+    return crc1;
+}
diff --git a/lib/libz/deflate.c b/lib/libz/deflate.c
index 0fc53bc1e820..29ce1f64a57a 100644
--- a/lib/libz/deflate.c
+++ b/lib/libz/deflate.c
@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2004 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.2.2 Copyright 1995-2004 Jean-loup Gailly ";
+   " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly ";
 /*
   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
@@ -264,7 +264,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 #endif
     if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
         windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
-        strategy < 0 || strategy > Z_RLE) {
+        strategy < 0 || strategy > Z_FIXED) {
         return Z_STREAM_ERROR;
     }
     if (windowBits == 8) windowBits = 9;  /* until 256-byte window bug fixed */
@@ -274,6 +274,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
     s->strm = strm;
 
     s->wrap = wrap;
+    s->gzhead = Z_NULL;
     s->w_bits = windowBits;
     s->w_size = 1 << s->w_bits;
     s->w_mask = s->w_size - 1;
@@ -333,9 +334,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
     if (length < MIN_MATCH) return Z_OK;
     if (length > MAX_DIST(s)) {
         length = MAX_DIST(s);
-#ifndef USE_DICT_HEAD
         dictionary += dictLength - length; /* use the tail of the dictionary */
-#endif
     }
     zmemcpy(s->window, dictionary, length);
     s->strstart = length;
@@ -390,6 +389,17 @@ int ZEXPORT deflateReset (strm)
     return Z_OK;
 }
 
+/* ========================================================================= */
+int ZEXPORT deflateSetHeader (strm, head)
+    z_streamp strm;
+    gz_headerp head;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (strm->state->wrap != 2) return Z_STREAM_ERROR;
+    strm->state->gzhead = head;
+    return Z_OK;
+}
+
 /* ========================================================================= */
 int ZEXPORT deflatePrime (strm, bits, value)
     z_streamp strm;
@@ -420,7 +430,7 @@ int ZEXPORT deflateParams(strm, level, strategy)
 #else
     if (level == Z_DEFAULT_COMPRESSION) level = 6;
 #endif
-    if (level < 0 || level > 9 || strategy < 0 || strategy > Z_RLE) {
+    if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {
         return Z_STREAM_ERROR;
     }
     func = configuration_table[s->level].func;
@@ -440,6 +450,25 @@ int ZEXPORT deflateParams(strm, level, strategy)
     return err;
 }
 
+/* ========================================================================= */
+int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
+    z_streamp strm;
+    int good_length;
+    int max_lazy;
+    int nice_length;
+    int max_chain;
+{
+    deflate_state *s;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    s = strm->state;
+    s->good_match = good_length;
+    s->max_lazy_match = max_lazy;
+    s->nice_match = nice_length;
+    s->max_chain_length = max_chain;
+    return Z_OK;
+}
+
 /* =========================================================================
  * For the default windowBits of 15 and memLevel of 8, this function returns
  * a close to exact, as well as small, upper bound on the compressed size.
@@ -548,20 +577,47 @@ int ZEXPORT deflate (strm, flush)
     if (s->status == INIT_STATE) {
 #ifdef GZIP
         if (s->wrap == 2) {
+            strm->adler = crc32(0L, Z_NULL, 0);
             put_byte(s, 31);
             put_byte(s, 139);
             put_byte(s, 8);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, 0);
-            put_byte(s, s->level == 9 ? 2 :
-                        (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
-                         4 : 0));
-            put_byte(s, 255);
-            s->status = BUSY_STATE;
-            strm->adler = crc32(0L, Z_NULL, 0);
+            if (s->gzhead == NULL) {
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, 0);
+                put_byte(s, s->level == 9 ? 2 :
+                            (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+                             4 : 0));
+                put_byte(s, OS_CODE);
+                s->status = BUSY_STATE;
+            }
+            else {
+                put_byte(s, (s->gzhead->text ? 1 : 0) +
+                            (s->gzhead->hcrc ? 2 : 0) +
+                            (s->gzhead->extra == Z_NULL ? 0 : 4) +
+                            (s->gzhead->name == Z_NULL ? 0 : 8) +
+                            (s->gzhead->comment == Z_NULL ? 0 : 16)
+                        );
+                put_byte(s, (Byte)(s->gzhead->time & 0xff));
+                put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));
+                put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));
+                put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));
+                put_byte(s, s->level == 9 ? 2 :
+                            (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+                             4 : 0));
+                put_byte(s, s->gzhead->os & 0xff);
+                if (s->gzhead->extra != NULL) {
+                    put_byte(s, s->gzhead->extra_len & 0xff);
+                    put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
+                }
+                if (s->gzhead->hcrc)
+                    strm->adler = crc32(strm->adler, s->pending_buf,
+                                        s->pending);
+                s->gzindex = 0;
+                s->status = EXTRA_STATE;
+            }
         }
         else
 #endif
@@ -592,6 +648,110 @@ int ZEXPORT deflate (strm, flush)
             strm->adler = adler32(0L, Z_NULL, 0);
         }
     }
+#ifdef GZIP
+    if (s->status == EXTRA_STATE) {
+        if (s->gzhead->extra != NULL) {
+            uInt beg = s->pending;  /* start of bytes to update crc */
+
+            while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size)
+                        break;
+                }
+                put_byte(s, s->gzhead->extra[s->gzindex]);
+                s->gzindex++;
+            }
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (s->gzindex == s->gzhead->extra_len) {
+                s->gzindex = 0;
+                s->status = NAME_STATE;
+            }
+        }
+        else
+            s->status = NAME_STATE;
+    }
+    if (s->status == NAME_STATE) {
+        if (s->gzhead->name != NULL) {
+            uInt beg = s->pending;  /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->name[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0) {
+                s->gzindex = 0;
+                s->status = COMMENT_STATE;
+            }
+        }
+        else
+            s->status = COMMENT_STATE;
+    }
+    if (s->status == COMMENT_STATE) {
+        if (s->gzhead->comment != NULL) {
+            uInt beg = s->pending;  /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->comment[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0)
+                s->status = HCRC_STATE;
+        }
+        else
+            s->status = HCRC_STATE;
+    }
+    if (s->status == HCRC_STATE) {
+        if (s->gzhead->hcrc) {
+            if (s->pending + 2 > s->pending_buf_size)
+                flush_pending(strm);
+            if (s->pending + 2 <= s->pending_buf_size) {
+                put_byte(s, (Byte)(strm->adler & 0xff));
+                put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
+                strm->adler = crc32(0L, Z_NULL, 0);
+                s->status = BUSY_STATE;
+            }
+        }
+        else
+            s->status = BUSY_STATE;
+    }
+#endif
 
     /* Flush as much pending output as possible */
     if (s->pending != 0) {
@@ -704,7 +864,12 @@ int ZEXPORT deflateEnd (strm)
     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
 
     status = strm->state->status;
-    if (status != INIT_STATE && status != BUSY_STATE &&
+    if (status != INIT_STATE &&
+        status != EXTRA_STATE &&
+        status != NAME_STATE &&
+        status != COMMENT_STATE &&
+        status != HCRC_STATE &&
+        status != BUSY_STATE &&
         status != FINISH_STATE) {
       return Z_STREAM_ERROR;
     }
@@ -744,12 +909,12 @@ int ZEXPORT deflateCopy (dest, source)
 
     ss = source->state;
 
-    *dest = *source;
+    zmemcpy(dest, source, sizeof(z_stream));
 
     ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
     if (ds == Z_NULL) return Z_MEM_ERROR;
     dest->state = (struct internal_state FAR *) ds;
-    *ds = *ss;
+    zmemcpy(ds, ss, sizeof(deflate_state));
     ds->strm = dest;
 
     ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
@@ -838,9 +1003,11 @@ 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
@@ -909,7 +1076,12 @@ local uInt longest_match(s, cur_match)
         match = s->window + cur_match;
 
         /* Skip to next match if the match length cannot increase
-         * or if the match length is less than 2:
+         * or if the match length is less than 2.  Note that the checks below
+         * for insufficient lookahead only occur occasionally for performance
+         * reasons.  Therefore uninitialized memory will be accessed, and
+         * conditional jumps will be made that depend on those values.
+         * However the length of the match is limited to the lookahead, so
+         * the output of deflate is not affected by the uninitialized values.
          */
 #if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
         /* This code assumes sizeof(unsigned short) == 2. Do not use
@@ -1131,6 +1303,7 @@ local void fill_window(s)
                later. (Using level 0 permanently is not an optimal usage of
                zlib, so we don't care about this pathological case.)
              */
+            /* %%% avoid this when Z_RLE */
             n = s->hash_size;
             p = &s->head[n];
             do {
@@ -1309,12 +1482,12 @@ local block_state deflate_fast(s, flush)
              * of the string with itself at the start of the input file).
              */
 #ifdef FASTEST
-            if ((s->strategy < Z_HUFFMAN_ONLY) ||
+            if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) ||
                 (s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
                 s->match_length = longest_match_fast (s, hash_head);
             }
 #else
-            if (s->strategy < Z_HUFFMAN_ONLY) {
+            if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
                 s->match_length = longest_match (s, hash_head);
             } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
                 s->match_length = longest_match_fast (s, hash_head);
@@ -1418,7 +1591,7 @@ local block_state deflate_slow(s, flush)
              * of window index 0 (in particular we have to avoid a match
              * of the string with itself at the start of the input file).
              */
-            if (s->strategy < Z_HUFFMAN_ONLY) {
+            if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
                 s->match_length = longest_match (s, hash_head);
             } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
                 s->match_length = longest_match_fast (s, hash_head);
@@ -1500,3 +1673,64 @@ local block_state deflate_slow(s, flush)
     return flush == Z_FINISH ? finish_done : block_done;
 }
 #endif /* FASTEST */
+
+#if 0
+/* ===========================================================================
+ * For Z_RLE, simply look for runs of bytes, generate matches only of distance
+ * one.  Do not maintain a hash table.  (It will be regenerated if this run of
+ * deflate switches away from Z_RLE.)
+ */
+local block_state deflate_rle(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    int bflush;         /* set if current block must be flushed */
+    uInt run;           /* length of run */
+    uInt max;           /* maximum length of run */
+    uInt prev;          /* byte at distance one to match */
+    Bytef *scan;        /* scan for end of run */
+
+    for (;;) {
+        /* Make sure that we always have enough lookahead, except
+         * at the end of the input file. We need MAX_MATCH bytes
+         * for the longest encodable run.
+         */
+        if (s->lookahead < MAX_MATCH) {
+            fill_window(s);
+            if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) {
+                return need_more;
+            }
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+
+        /* See how many times the previous byte repeats */
+        run = 0;
+        if (s->strstart > 0) {      /* if there is a previous byte, that is */
+            max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH;
+            scan = s->window + s->strstart - 1;
+            prev = *scan++;
+            do {
+                if (*scan++ != prev)
+                    break;
+            } while (++run < max);
+        }
+
+        /* Emit match if have run of MIN_MATCH or longer, else emit literal */
+        if (run >= MIN_MATCH) {
+            check_match(s, s->strstart, s->strstart - 1, run);
+            _tr_tally_dist(s, 1, run - MIN_MATCH, bflush);
+            s->lookahead -= run;
+            s->strstart += run;
+        } else {
+            /* No match, output a literal byte */
+            Tracevv((stderr,"%c", s->window[s->strstart]));
+            _tr_tally_lit (s, s->window[s->strstart], bflush);
+            s->lookahead--;
+            s->strstart++;
+        }
+        if (bflush) FLUSH_BLOCK(s, 0);
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
+#endif
diff --git a/lib/libz/deflate.h b/lib/libz/deflate.h
index 410681d18a4a..05a5ab3a2c12 100644
--- a/lib/libz/deflate.h
+++ b/lib/libz/deflate.h
@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2002 Jean-loup Gailly
+ * Copyright (C) 1995-2004 Jean-loup Gailly
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -49,6 +49,10 @@
 /* All codes must not exceed MAX_BITS bits */
 
 #define INIT_STATE    42
+#define EXTRA_STATE   69
+#define NAME_STATE    73
+#define COMMENT_STATE 91
+#define HCRC_STATE   103
 #define BUSY_STATE   113
 #define FINISH_STATE 666
 /* Stream status */
@@ -93,8 +97,10 @@ typedef struct internal_state {
     Bytef *pending_buf;  /* output still pending */
     ulg   pending_buf_size; /* size of pending_buf */
     Bytef *pending_out;  /* next pending byte to output to the stream */
-    int   pending;       /* nb of bytes in the pending buffer */
+    uInt   pending;      /* nb of bytes in the pending buffer */
     int   wrap;          /* bit 0 true for zlib, bit 1 true for gzip */
+    gz_headerp  gzhead;  /* gzip header information to write */
+    uInt   gzindex;      /* where in extra, name, or comment */
     Byte  method;        /* STORED (for zip only) or DEFLATED */
     int   last_flush;    /* value of flush param for previous deflate call */
 
diff --git a/lib/libz/example.c b/lib/libz/example.c
index c2361f98f2d9..6c8a0ee76335 100644
--- a/lib/libz/example.c
+++ b/lib/libz/example.c
@@ -1,5 +1,5 @@
 /* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -11,8 +11,6 @@
 #ifdef STDC
 #  include <string.h>
 #  include <stdlib.h>
-#else
-   extern void exit  OF((int));
 #endif
 
 #if defined(VMS) || defined(RISCOS)
diff --git a/lib/libz/gzio.c b/lib/libz/gzio.c
index 5424de0baf4e..0aa03e9f9973 100644
--- a/lib/libz/gzio.c
+++ b/lib/libz/gzio.c
@@ -1,5 +1,5 @@
 /* gzio.c -- IO on .gz files
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
@@ -12,7 +12,7 @@ __FBSDID("$FreeBSD$");
 
 #include "zutil.h"
 
-#ifdef NO_DEFLATE       /* for compatiblity with old definition */
+#ifdef NO_DEFLATE       /* for compatibility with old definition */
 #  define NO_GZCOMPRESS
 #endif
 
@@ -221,7 +221,7 @@ gzFile ZEXPORT gzdopen (fd, mode)
     int fd;
     const char *mode;
 {
-    char name[20];
+    char name[46];      /* allow for up to 128-bit integers */
 
     if (fd < 0) return (gzFile)Z_NULL;
     snprintf(name, sizeof(name), "<fd:%d>", fd); /* for debugging */
@@ -265,7 +265,7 @@ local int get_byte(s)
     if (s->z_eof) return EOF;
     if (s->stream.avail_in == 0) {
         errno = 0;
-        s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+        s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
         if (s->stream.avail_in == 0) {
             s->z_eof = 1;
             if (ferror(s->file)) s->z_err = Z_ERRNO;
@@ -301,7 +301,7 @@ local void check_header(s)
     if (len < 2) {
         if (len) s->inbuf[0] = s->stream.next_in[0];
         errno = 0;
-        len = fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
+        len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
         if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
         s->stream.avail_in += len;
         s->stream.next_in = s->inbuf;
@@ -416,6 +416,7 @@ int ZEXPORT gzread (file, buf, len)
         s->stream.avail_out--;
         s->back = EOF;
         s->out++;
+        start++;
         if (s->last) {
             s->z_err = Z_STREAM_END;
             return 1;
@@ -437,8 +438,8 @@ int ZEXPORT gzread (file, buf, len)
                 s->stream.avail_in  -= n;
             }
             if (s->stream.avail_out > 0) {
-                s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
-                                             s->file);
+                s->stream.avail_out -=
+                    (uInt)fread(next_out, 1, s->stream.avail_out, s->file);
             }
             len -= s->stream.avail_out;
             s->in  += len;
@@ -449,17 +450,13 @@ int ZEXPORT gzread (file, buf, len)
         if (s->stream.avail_in == 0 && !s->z_eof) {
 
             errno = 0;
-            s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+            s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
             if (s->stream.avail_in == 0) {
                 s->z_eof = 1;
                 if (ferror(s->file)) {
                     s->z_err = Z_ERRNO;
                     break;
                 }
-                if (feof(s->file)) {        /* avoid error for empty file */
-                    s->z_err = Z_STREAM_END;
-                    break;
-                }
             }
             s->stream.next_in = s->inbuf;
         }
@@ -493,6 +490,9 @@ int ZEXPORT gzread (file, buf, len)
     }
     s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
 
+    if (len == s->stream.avail_out &&
+        (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO))
+        return -1;
     return (int)(len - s->stream.avail_out);
 }
 
@@ -903,6 +903,18 @@ int ZEXPORT gzeof (file)
     return s->z_err == Z_STREAM_END;
 }
 
+/* ===========================================================================
+     Returns 1 if reading and doing so transparently, otherwise zero.
+*/
+int ZEXPORT gzdirect (file)
+    gzFile file;
+{
+    gz_stream *s = (gz_stream*)file;
+
+    if (s == NULL || s->mode != 'r') return 0;
+    return s->transparent;
+}
+
 /* ===========================================================================
    Outputs a long in LSB order to the given file
 */
@@ -942,7 +954,6 @@ local uLong getLong (s)
 int ZEXPORT gzclose (file)
     gzFile file;
 {
-    int err;
     gz_stream *s = (gz_stream*)file;
 
     if (s == NULL) return Z_STREAM_ERROR;
@@ -951,8 +962,8 @@ int ZEXPORT gzclose (file)
 #ifdef NO_GZCOMPRESS
         return Z_STREAM_ERROR;
 #else
-        err = do_flush (file, Z_FINISH);
-        if (err != Z_OK) return destroy((gz_stream*)file);
+        if (do_flush (file, Z_FINISH) != Z_OK)
+            return destroy((gz_stream*)file);
 
         putLong (s->file, s->crc);
         putLong (s->file, (uLong)(s->in & 0xffffffff));
@@ -961,10 +972,16 @@ int ZEXPORT gzclose (file)
     return destroy((gz_stream*)file);
 }
 
+#ifdef STDC
+#  define zstrerror(errnum) strerror(errnum)
+#else
+#  define zstrerror(errnum) ""
+#endif
+
 /* ===========================================================================
-     Returns the error message for the last error which occured on the
+     Returns the error message for the last error which occurred on the
    given compressed file. errnum is set to zlib error number. If an
-   error occured in the file system and not in the compression library,
+   error occurred in the file system and not in the compression library,
    errnum is set to Z_ERRNO and the application may consult errno
    to get the exact error code.
 */
diff --git a/lib/libz/infback.c b/lib/libz/infback.c
index 262f97c73ac7..455dbc9ee843 100644
--- a/lib/libz/infback.c
+++ b/lib/libz/infback.c
@@ -1,5 +1,5 @@
 /* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2005 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -26,7 +26,7 @@ local void fixedtables OF((struct inflate_state FAR *state));
    window and output buffer that is 2**windowBits bytes.
  */
 int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
-z_stream FAR *strm;
+z_streamp strm;
 int windowBits;
 unsigned char FAR *window;
 const char *version;
@@ -50,7 +50,8 @@ int stream_size;
                                                sizeof(struct inflate_state));
     if (state == Z_NULL) return Z_MEM_ERROR;
     Tracev((stderr, "inflate: allocated\n"));
-    strm->state = (voidpf)state;
+    strm->state = (struct internal_state FAR *)state;
+    state->dmax = 32768U;
     state->wbits = windowBits;
     state->wsize = 1U << windowBits;
     state->window = window;
@@ -238,7 +239,7 @@ struct inflate_state FAR *state;
    are not correct, i.e. strm is Z_NULL or the state was not initialized.
  */
 int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
-z_stream FAR *strm;
+z_streamp strm;
 in_func in;
 void FAR *in_desc;
 out_func out;
@@ -611,7 +612,7 @@ void FAR *out_desc;
 }
 
 int ZEXPORT inflateBackEnd(strm)
-z_stream FAR *strm;
+z_streamp strm;
 {
     if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
         return Z_STREAM_ERROR;
diff --git a/lib/libz/inffast.c b/lib/libz/inffast.c
index 8c02a178d046..bbee92ed1e6b 100644
--- a/lib/libz/inffast.c
+++ b/lib/libz/inffast.c
@@ -74,6 +74,9 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
     unsigned char FAR *out;     /* local strm->next_out */
     unsigned char FAR *beg;     /* inflate()'s initial strm->next_out */
     unsigned char FAR *end;     /* while out < end, enough space available */
+#ifdef INFLATE_STRICT
+    unsigned dmax;              /* maximum distance from zlib header */
+#endif
     unsigned wsize;             /* window size or zero if not using window */
     unsigned whave;             /* valid bytes in the window */
     unsigned write;             /* window write index */
@@ -98,6 +101,9 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
     out = strm->next_out - OFF;
     beg = out - (start - strm->avail_out);
     end = out + (strm->avail_out - 257);
+#ifdef INFLATE_STRICT
+    dmax = state->dmax;
+#endif
     wsize = state->wsize;
     whave = state->whave;
     write = state->write;
@@ -167,6 +173,13 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                     }
                 }
                 dist += (unsigned)hold & ((1U << op) - 1);
+#ifdef INFLATE_STRICT
+                if (dist > dmax) {
+                    strm->msg = (char *)"invalid distance too far back";
+                    state->mode = BAD;
+                    break;
+                }
+#endif
                 hold >>= op;
                 bits -= op;
                 Tracevv((stderr, "inflate:         distance %u\n", dist));
diff --git a/lib/libz/inflate.c b/lib/libz/inflate.c
index c6d38266d07e..792fdee8e9c7 100644
--- a/lib/libz/inflate.c
+++ b/lib/libz/inflate.c
@@ -1,5 +1,5 @@
 /* inflate.c -- zlib decompression
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2005 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -113,8 +113,11 @@ z_streamp strm;
     state->mode = HEAD;
     state->last = 0;
     state->havedict = 0;
+    state->dmax = 32768U;
+    state->head = Z_NULL;
     state->wsize = 0;
     state->whave = 0;
+    state->write = 0;
     state->hold = 0;
     state->bits = 0;
     state->lencode = state->distcode = state->next = state->codes;
@@ -122,6 +125,22 @@ z_streamp strm;
     return Z_OK;
 }
 
+int ZEXPORT inflatePrime(strm, bits, value)
+z_streamp strm;
+int bits;
+int value;
+{
+    struct inflate_state FAR *state;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
+    value &= (1L << bits) - 1;
+    state->hold += value << state->bits;
+    state->bits += bits;
+    return Z_OK;
+}
+
 int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
 z_streamp strm;
 int windowBits;
@@ -144,7 +163,7 @@ int stream_size;
             ZALLOC(strm, 1, sizeof(struct inflate_state));
     if (state == Z_NULL) return Z_MEM_ERROR;
     Tracev((stderr, "inflate: allocated\n"));
-    strm->state = (voidpf)state;
+    strm->state = (struct internal_state FAR *)state;
     if (windowBits < 0) {
         state->wrap = 0;
         windowBits = -windowBits;
@@ -582,6 +601,8 @@ int flush;
                 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 */
 #else
             if (
@@ -597,11 +618,13 @@ int flush;
                 break;
             }
             DROPBITS(4);
-            if (BITS(4) + 8 > state->wbits) {
+            len = BITS(4) + 8;
+            if (len > state->wbits) {
                 strm->msg = (char *)"invalid window size";
                 state->mode = BAD;
                 break;
             }
+            state->dmax = 1U << len;
             Tracev((stderr, "inflate:   zlib header ok\n"));
             strm->adler = state->check = adler32(0L, Z_NULL, 0);
             state->mode = hold & 0x200 ? DICTID : TYPE;
@@ -621,16 +644,24 @@ int flush;
                 state->mode = BAD;
                 break;
             }
+            if (state->head != Z_NULL)
+                state->head->text = (int)((hold >> 8) & 1);
             if (state->flags & 0x0200) CRC2(state->check, hold);
             INITBITS();
             state->mode = TIME;
         case TIME:
             NEEDBITS(32);
+            if (state->head != Z_NULL)
+                state->head->time = hold;
             if (state->flags & 0x0200) CRC4(state->check, hold);
             INITBITS();
             state->mode = OS;
         case OS:
             NEEDBITS(16);
+            if (state->head != Z_NULL) {
+                state->head->xflags = (int)(hold & 0xff);
+                state->head->os = (int)(hold >> 8);
+            }
             if (state->flags & 0x0200) CRC2(state->check, hold);
             INITBITS();
             state->mode = EXLEN;
@@ -638,15 +669,26 @@ int flush;
             if (state->flags & 0x0400) {
                 NEEDBITS(16);
                 state->length = (unsigned)(hold);
+                if (state->head != Z_NULL)
+                    state->head->extra_len = (unsigned)hold;
                 if (state->flags & 0x0200) CRC2(state->check, hold);
                 INITBITS();
             }
+            else if (state->head != Z_NULL)
+                state->head->extra = Z_NULL;
             state->mode = EXTRA;
         case EXTRA:
             if (state->flags & 0x0400) {
                 copy = state->length;
                 if (copy > have) copy = have;
                 if (copy) {
+                    if (state->head != Z_NULL &&
+                        state->head->extra != Z_NULL) {
+                        len = state->head->extra_len - state->length;
+                        zmemcpy(state->head->extra + len, next,
+                                len + copy > state->head->extra_max ?
+                                state->head->extra_max - len : copy);
+                    }
                     if (state->flags & 0x0200)
                         state->check = crc32(state->check, next, copy);
                     have -= copy;
@@ -655,6 +697,7 @@ int flush;
                 }
                 if (state->length) goto inf_leave;
             }
+            state->length = 0;
             state->mode = NAME;
         case NAME:
             if (state->flags & 0x0800) {
@@ -662,13 +705,20 @@ int flush;
                 copy = 0;
                 do {
                     len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->name != Z_NULL &&
+                            state->length < state->head->name_max)
+                        state->head->name[state->length++] = len;
                 } while (len && copy < have);
-                if (state->flags & 0x02000)
+                if (state->flags & 0x0200)
                     state->check = crc32(state->check, next, copy);
                 have -= copy;
                 next += copy;
                 if (len) goto inf_leave;
             }
+            else if (state->head != Z_NULL)
+                state->head->name = Z_NULL;
+            state->length = 0;
             state->mode = COMMENT;
         case COMMENT:
             if (state->flags & 0x1000) {
@@ -676,13 +726,19 @@ int flush;
                 copy = 0;
                 do {
                     len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->comment != Z_NULL &&
+                            state->length < state->head->comm_max)
+                        state->head->comment[state->length++] = len;
                 } while (len && copy < have);
-                if (state->flags & 0x02000)
+                if (state->flags & 0x0200)
                     state->check = crc32(state->check, next, copy);
                 have -= copy;
                 next += copy;
                 if (len) goto inf_leave;
             }
+            else if (state->head != Z_NULL)
+                state->head->comment = Z_NULL;
             state->mode = HCRC;
         case HCRC:
             if (state->flags & 0x0200) {
@@ -694,6 +750,10 @@ int flush;
                 }
                 INITBITS();
             }
+            if (state->head != Z_NULL) {
+                state->head->hcrc = (int)((state->flags >> 9) & 1);
+                state->head->done = 1;
+            }
             strm->adler = state->check = crc32(0L, Z_NULL, 0);
             state->mode = TYPE;
             break;
@@ -969,6 +1029,13 @@ int flush;
                 state->offset += BITS(state->extra);
                 DROPBITS(state->extra);
             }
+#ifdef INFLATE_STRICT
+            if (state->offset > state->dmax) {
+                strm->msg = (char *)"invalid distance too far back";
+                state->mode = BAD;
+                break;
+            }
+#endif
             if (state->offset > state->whave + out - left) {
                 strm->msg = (char *)"invalid distance too far back";
                 state->mode = BAD;
@@ -1110,12 +1177,16 @@ uInt dictLength;
     /* check state */
     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
     state = (struct inflate_state FAR *)strm->state;
-    if (state->mode != DICT) return Z_STREAM_ERROR;
+    if (state->wrap != 0 && state->mode != DICT)
+        return Z_STREAM_ERROR;
 
     /* check for correct dictionary id */
-    id = adler32(0L, Z_NULL, 0);
-    id = adler32(id, dictionary, dictLength);
-    if (id != state->check) return Z_DATA_ERROR;
+    if (state->mode == DICT) {
+        id = adler32(0L, Z_NULL, 0);
+        id = adler32(id, dictionary, dictLength);
+        if (id != state->check)
+            return Z_DATA_ERROR;
+    }
 
     /* copy dictionary to window */
     if (updatewindow(strm, strm->avail_out)) {
@@ -1137,6 +1208,23 @@ uInt dictLength;
     return Z_OK;
 }
 
+int ZEXPORT inflateGetHeader(strm, head)
+z_streamp strm;
+gz_headerp head;
+{
+    struct inflate_state FAR *state;
+
+    /* check state */
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
+
+    /* save header structure */
+    state->head = head;
+    head->done = 0;
+    return Z_OK;
+}
+
 /*
    Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff.  Return when found
    or when out of input.  When called, *have is the number of pattern bytes
@@ -1239,6 +1327,7 @@ z_streamp source;
     struct inflate_state FAR *state;
     struct inflate_state FAR *copy;
     unsigned char FAR *window;
+    unsigned wsize;
 
     /* check input */
     if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
@@ -1261,14 +1350,19 @@ z_streamp source;
     }
 
     /* copy state */
-    *dest = *source;
-    *copy = *state;
-    copy->lencode = copy->codes + (state->lencode - state->codes);
-    copy->distcode = copy->codes + (state->distcode - state->codes);
+    zmemcpy(dest, source, sizeof(z_stream));
+    zmemcpy(copy, state, sizeof(struct inflate_state));
+    if (state->lencode >= state->codes &&
+        state->lencode <= state->codes + ENOUGH - 1) {
+        copy->lencode = copy->codes + (state->lencode - state->codes);
+        copy->distcode = copy->codes + (state->distcode - state->codes);
+    }
     copy->next = copy->codes + (state->next - state->codes);
-    if (window != Z_NULL)
-        zmemcpy(window, state->window, 1U << state->wbits);
+    if (window != Z_NULL) {
+        wsize = 1U << state->wbits;
+        zmemcpy(window, state->window, wsize);
+    }
     copy->window = window;
-    dest->state = (voidpf)copy;
+    dest->state = (struct internal_state FAR *)copy;
     return Z_OK;
 }
diff --git a/lib/libz/inftrees.c b/lib/libz/inftrees.c
index 509461d92734..8a9c13ff03d8 100644
--- a/lib/libz/inftrees.c
+++ b/lib/libz/inftrees.c
@@ -1,5 +1,5 @@
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2004 Mark Adler
+ * Copyright (C) 1995-2005 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 1.2.2 Copyright 1995-2004 Mark Adler ";
+   " inflate 1.2.3 Copyright 1995-2005 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, 198};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196};
     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,
@@ -232,6 +232,7 @@ unsigned short FAR *work;
         /* replicate for those indices with low len bits equal to huff */
         incr = 1U << (len - drop);
         fill = 1U << curr;
+        min = fill;                 /* save offset to next table */
         do {
             fill -= incr;
             next[(huff >> drop) + fill] = this;
@@ -262,7 +263,7 @@ unsigned short FAR *work;
                 drop = root;
 
             /* increment past last table */
-            next += 1U << curr;
+            next += min;            /* here min is 1 << curr */
 
             /* determine length of next table */
             curr = len - drop;
diff --git a/lib/libz/inftrees.h b/lib/libz/inftrees.h
index 424af173560a..b1104c87e769 100644
--- a/lib/libz/inftrees.h
+++ b/lib/libz/inftrees.h
@@ -1,5 +1,5 @@
 /* inftrees.h -- header to use inftrees.c
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2005 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
diff --git a/lib/libz/minigzip.c b/lib/libz/minigzip.c
index 979fd9f24c83..b29d14aea484 100644
--- a/lib/libz/minigzip.c
+++ b/lib/libz/minigzip.c
@@ -1,5 +1,5 @@
 /* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -22,8 +22,6 @@ __FBSDID("$FreeBSD$");
 #ifdef STDC
 #  include <string.h>
 #  include <stdlib.h>
-#else
-   extern void exit  OF((int));
 #endif
 
 #ifdef USE_MMAP
@@ -322,6 +320,8 @@ int main(argc, argv)
         break;
       argc--, argv++;
     }
+    if (outmode[3] == ' ')
+        outmode[3] = 0;
     if (argc == 0) {
         SET_BINARY_MODE(stdin);
         SET_BINARY_MODE(stdout);
diff --git a/lib/libz/trees.c b/lib/libz/trees.c
index 52c820fa2e97..395e4e16814e 100644
--- a/lib/libz/trees.c
+++ b/lib/libz/trees.c
@@ -1,5 +1,5 @@
 /* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2003 Jean-loup Gailly
+ * Copyright (C) 1995-2005 Jean-loup Gailly
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -555,7 +555,7 @@ local void gen_bitlen(s, desc)
         while (n != 0) {
             m = s->heap[--h];
             if (m > max_code) continue;
-            if (tree[m].Len != (unsigned) bits) {
+            if ((unsigned) tree[m].Len != (unsigned) bits) {
                 Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
                 s->opt_len += ((long)bits - (long)tree[m].Len)
                               *(long)tree[m].Freq;
@@ -930,8 +930,9 @@ void _tr_flush_block(s, buf, stored_len, eof)
     /* Build the Huffman trees unless a stored block is forced */
     if (s->level > 0) {
 
-         /* Check if the file is ascii or binary */
-        if (s->strm->data_type == Z_UNKNOWN) set_data_type(s);
+        /* Check if the file is binary or text */
+        if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
+            set_data_type(s);
 
         /* Construct the literal and distance trees */
         build_tree(s, (tree_desc *)(&(s->l_desc)));
@@ -982,7 +983,7 @@ void _tr_flush_block(s, buf, stored_len, eof)
 #ifdef FORCE_STATIC
     } else if (static_lenb >= 0) { /* force static trees */
 #else
-    } else if (static_lenb == opt_lenb) {
+    } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
 #endif
         send_bits(s, (STATIC_TREES<<1)+eof, 3);
         compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
@@ -1117,21 +1118,24 @@ local void compress_block(s, ltree, dtree)
 }
 
 /* ===========================================================================
- * Set the data type to ASCII or BINARY, using a crude approximation:
- * binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
- * IN assertion: the fields freq of dyn_ltree are set and the total of all
- * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
+ * Set the data type to BINARY or TEXT, using a crude approximation:
+ * set it to Z_TEXT if all symbols are either printable characters (33 to 255)
+ * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
+ * IN assertion: the fields Freq of dyn_ltree are set.
  */
 local void set_data_type(s)
     deflate_state *s;
 {
-    int n = 0;
-    unsigned ascii_freq = 0;
-    unsigned bin_freq = 0;
-    while (n < 7)        bin_freq += s->dyn_ltree[n++].Freq;
-    while (n < 128)    ascii_freq += s->dyn_ltree[n++].Freq;
-    while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq;
-    s->strm->data_type = bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII;
+    int n;
+
+    for (n = 0; n < 9; n++)
+        if (s->dyn_ltree[n].Freq != 0)
+            break;
+    if (n == 9)
+        for (n = 14; n < 32; n++)
+            if (s->dyn_ltree[n].Freq != 0)
+                break;
+    s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
 }
 
 /* ===========================================================================
diff --git a/lib/libz/zconf.h b/lib/libz/zconf.h
index 66e929d209bf..205db95c0f19 100644
--- a/lib/libz/zconf.h
+++ b/lib/libz/zconf.h
@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2004 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -43,6 +43,10 @@
 #  define get_crc_table         z_get_crc_table
 #  define zError                z_zError
 
+#  define alloc_func            z_alloc_func
+#  define free_func             z_free_func
+#  define in_func               z_in_func
+#  define out_func              z_out_func
 #  define Byte                  z_Byte
 #  define uInt                  z_uInt
 #  define uLong                 z_uLong
@@ -64,8 +68,10 @@
 #if defined(_WINDOWS) && !defined(WINDOWS)
 #  define WINDOWS
 #endif
-#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
-#  define WIN32
+#if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__)
+#  ifndef WIN32
+#    define WIN32
+#  endif
 #endif
 #if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
 #  if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
diff --git a/lib/libz/zlib.3 b/lib/libz/zlib.3
index 3139e2467f25..90b8162870fd 100644
--- a/lib/libz/zlib.3
+++ b/lib/libz/zlib.3
@@ -1,4 +1,4 @@
-.TH ZLIB 3 "3 October 2004"
+.TH ZLIB 3 "18 July 2005"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -133,8 +133,8 @@ before asking for help.
 Send questions and/or comments to zlib@gzip.org,
 or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
 .SH AUTHORS
-Version 1.2.2
-Copyright (C) 1995-2004 Jean-loup Gailly (jloup@gzip.org)
+Version 1.2.3
+Copyright (C) 1995-2005 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP
 This software is provided "as-is,"
diff --git a/lib/libz/zutil.c b/lib/libz/zutil.c
index 0ef4f99f57eb..d55f5948a37f 100644
--- a/lib/libz/zutil.c
+++ b/lib/libz/zutil.c
@@ -1,5 +1,5 @@
 /* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -11,10 +11,6 @@
 struct internal_state      {int dummy;}; /* for buggy compilers */
 #endif
 
-#ifndef STDC
-extern void exit OF((int));
-#endif
-
 const char * const z_errmsg[10] = {
 "need dictionary",     /* Z_NEED_DICT       2  */
 "stream end",          /* Z_STREAM_END      1  */
@@ -78,38 +74,38 @@ uLong ZEXPORT zlibCompileFlags()
     flags += 1 << 13;
 #endif
 #ifdef NO_GZCOMPRESS
-    flags += 1 << 16;
+    flags += 1L << 16;
 #endif
 #ifdef NO_GZIP
-    flags += 1 << 17;
+    flags += 1L << 17;
 #endif
 #ifdef PKZIP_BUG_WORKAROUND
-    flags += 1 << 20;
+    flags += 1L << 20;
 #endif
 #ifdef FASTEST
-    flags += 1 << 21;
+    flags += 1L << 21;
 #endif
 #ifdef STDC
 #  ifdef NO_vsnprintf
-        flags += 1 << 25;
+        flags += 1L << 25;
 #    ifdef HAS_vsprintf_void
-        flags += 1 << 26;
+        flags += 1L << 26;
 #    endif
 #  else
 #    ifdef HAS_vsnprintf_void
-        flags += 1 << 26;
+        flags += 1L << 26;
 #    endif
 #  endif
 #else
-        flags += 1 << 24;
+        flags += 1L << 24;
 #  ifdef NO_snprintf
-        flags += 1 << 25;
+        flags += 1L << 25;
 #    ifdef HAS_sprintf_void
-        flags += 1 << 26;
+        flags += 1L << 26;
 #    endif
 #  else
 #    ifdef HAS_snprintf_void
-        flags += 1 << 26;
+        flags += 1L << 26;
 #    endif
 #  endif
 #endif
@@ -141,7 +137,10 @@ const char * ZEXPORT zError(err)
 }
 
 #if defined(_WIN32_WCE)
-    /* does not exist on WCE */
+    /* The 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.
+     */
     int errno = 0;
 #endif
 
diff --git a/lib/libz/zutil.h b/lib/libz/zutil.h
index 7b42edcaa984..b7d5eff81b69 100644
--- a/lib/libz/zutil.h
+++ b/lib/libz/zutil.h
@@ -1,5 +1,5 @@
 /* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2005 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -17,14 +17,26 @@
 #include "zlib.h"
 
 #ifdef STDC
-#  include <stddef.h>
+#  ifndef _WIN32_WCE
+#    include <stddef.h>
+#  endif
 #  include <string.h>
 #  include <stdlib.h>
 #endif
 #ifdef NO_ERRNO_H
+#   ifdef _WIN32_WCE
+      /* The 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.  We rename it to
+       * avoid conflict with other libraries that use the same workaround.
+       */
+#     define errno z_errno
+#   endif
     extern int errno;
 #else
-#   include <errno.h>
+#  ifndef _WIN32_WCE
+#    include <errno.h>
+#  endif
 #endif
 
 #ifndef local
@@ -105,6 +117,9 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
 
 #ifdef OS2
 #  define OS_CODE  0x06
+#  ifdef M_I86
+     #include <malloc.h>
+#  endif
 #endif
 
 #if defined(MACOS) || defined(TARGET_OS_MAC)
@@ -193,15 +208,6 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
 #  define NO_vsnprintf
 #endif
 
-#ifdef HAVE_STRERROR
-#  ifndef VMS
-     extern char *strerror OF((int));
-#  endif
-#  define zstrerror(errnum) strerror(errnum)
-#else
-#  define zstrerror(errnum) ""
-#endif
-
 #if defined(pyr)
 #  define NO_MEMCPY
 #endif