Release-1.5.9-20090814

1 files changed, 0 insertions, 1368 deletions

diff --git a/libpng/inflate.c b/libpng/inflate.c
deleted file mode 100644
index 792fdee..0000000
--- a/libpng/inflate.c
+++ /dev/null
@@ -1,1368 +0,0 @@
-/* inflate.c -- zlib decompression
- * Copyright (C) 1995-2005 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * Change history:
- *
- * 1.2.beta0    24 Nov 2002
- * - First version -- complete rewrite of inflate to simplify code, avoid
- *   creation of window when not needed, minimize use of window when it is
- *   needed, make inffast.c even faster, implement gzip decoding, and to
- *   improve code readability and style over the previous zlib inflate code
- *
- * 1.2.beta1    25 Nov 2002
- * - Use pointers for available input and output checking in inffast.c
- * - Remove input and output counters in inffast.c
- * - Change inffast.c entry and loop from avail_in >= 7 to >= 6
- * - Remove unnecessary second byte pull from length extra in inffast.c
- * - Unroll direct copy to three copies per loop in inffast.c
- *
- * 1.2.beta2    4 Dec 2002
- * - Change external routine names to reduce potential conflicts
- * - Correct filename to inffixed.h for fixed tables in inflate.c
- * - Make hbuf[] unsigned char to match parameter type in inflate.c
- * - Change strm->next_out[-state->offset] to *(strm->next_out - state->offset)
- *   to avoid negation problem on Alphas (64 bit) in inflate.c
- *
- * 1.2.beta3    22 Dec 2002
- * - Add comments on state->bits assertion in inffast.c
- * - Add comments on op field in inftrees.h
- * - Fix bug in reuse of allocated window after inflateReset()
- * - Remove bit fields--back to byte structure for speed
- * - Remove distance extra == 0 check in inflate_fast()--only helps for lengths
- * - Change post-increments to pre-increments in inflate_fast(), PPC biased?
- * - Add compile time option, POSTINC, to use post-increments instead (Intel?)
- * - Make MATCH copy in inflate() much faster for when inflate_fast() not used
- * - Use local copies of stream next and avail values, as well as local bit
- *   buffer and bit count in inflate()--for speed when inflate_fast() not used
- *
- * 1.2.beta4    1 Jan 2003
- * - Split ptr - 257 statements in inflate_table() to avoid compiler warnings
- * - Move a comment on output buffer sizes from inffast.c to inflate.c
- * - Add comments in inffast.c to introduce the inflate_fast() routine
- * - Rearrange window copies in inflate_fast() for speed and simplification
- * - Unroll last copy for window match in inflate_fast()
- * - Use local copies of window variables in inflate_fast() for speed
- * - Pull out common write == 0 case for speed in inflate_fast()
- * - Make op and len in inflate_fast() unsigned for consistency
- * - Add FAR to lcode and dcode declarations in inflate_fast()
- * - Simplified bad distance check in inflate_fast()
- * - Added inflateBackInit(), inflateBack(), and inflateBackEnd() in new
- *   source file infback.c to provide a call-back interface to inflate for
- *   programs like gzip and unzip -- uses window as output buffer to avoid
- *   window copying
- *
- * 1.2.beta5    1 Jan 2003
- * - Improved inflateBack() interface to allow the caller to provide initial
- *   input in strm.
- * - Fixed stored blocks bug in inflateBack()
- *
- * 1.2.beta6    4 Jan 2003
- * - Added comments in inffast.c on effectiveness of POSTINC
- * - Typecasting all around to reduce compiler warnings
- * - Changed loops from while (1) or do {} while (1) to for (;;), again to
- *   make compilers happy
- * - Changed type of window in inflateBackInit() to unsigned char *
- *
- * 1.2.beta7    27 Jan 2003
- * - Changed many types to unsigned or unsigned short to avoid warnings
- * - Added inflateCopy() function
- *
- * 1.2.0        9 Mar 2003
- * - Changed inflateBack() interface to provide separate opaque descriptors
- *   for the in() and out() functions
- * - Changed inflateBack() argument and in_func typedef to swap the length
- *   and buffer address return values for the input function
- * - Check next_in and next_out for Z_NULL on entry to inflate()
- *
- * The history for versions after 1.2.0 are in ChangeLog in zlib distribution.
- */
-
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-#ifdef MAKEFIXED
-#  ifndef BUILDFIXED
-#    define BUILDFIXED
-#  endif
-#endif
-
-/* function prototypes */
-local void fixedtables OF((struct inflate_state FAR *state));
-local int updatewindow OF((z_streamp strm, unsigned out));
-#ifdef BUILDFIXED
-   void makefixed OF((void));
-#endif
-local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf,
-                              unsigned len));
-
-int ZEXPORT inflateReset(strm)
-z_streamp strm;
-{
-    struct inflate_state FAR *state;
-
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    strm->total_in = strm->total_out = state->total = 0;
-    strm->msg = Z_NULL;
-    strm->adler = 1;        /* to support ill-conceived Java test suite */
-    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;
-    Tracev((stderr, "inflate: reset\n"));
-    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;
-const char *version;
-int stream_size;
-{
-    struct inflate_state FAR *state;
-
-    if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
-        stream_size != (int)(sizeof(z_stream)))
-        return Z_VERSION_ERROR;
-    if (strm == Z_NULL) return Z_STREAM_ERROR;
-    strm->msg = Z_NULL;                 /* in case we return an error */
-    if (strm->zalloc == (alloc_func)0) {
-        strm->zalloc = zcalloc;
-        strm->opaque = (voidpf)0;
-    }
-    if (strm->zfree == (free_func)0) strm->zfree = zcfree;
-    state = (struct inflate_state FAR *)
-            ZALLOC(strm, 1, sizeof(struct inflate_state));
-    if (state == Z_NULL) return Z_MEM_ERROR;
-    Tracev((stderr, "inflate: allocated\n"));
-    strm->state = (struct internal_state FAR *)state;
-    if (windowBits < 0) {
-        state->wrap = 0;
-        windowBits = -windowBits;
-    }
-    else {
-        state->wrap = (windowBits >> 4) + 1;
-#ifdef GUNZIP
-        if (windowBits < 48) windowBits &= 15;
-#endif
-    }
-    if (windowBits < 8 || windowBits > 15) {
-        ZFREE(strm, state);
-        strm->state = Z_NULL;
-        return Z_STREAM_ERROR;
-    }
-    state->wbits = (unsigned)windowBits;
-    state->window = Z_NULL;
-    return inflateReset(strm);
-}
-
-int ZEXPORT inflateInit_(strm, version, stream_size)
-z_streamp strm;
-const char *version;
-int stream_size;
-{
-    return inflateInit2_(strm, DEF_WBITS, version, stream_size);
-}
-
-/*
-   Return state with length and distance decoding tables and index sizes set to
-   fixed code decoding.  Normally this returns fixed tables from inffixed.h.
-   If BUILDFIXED is defined, then instead this routine builds the tables the
-   first time it's called, and returns those tables the first time and
-   thereafter.  This reduces the size of the code by about 2K bytes, in
-   exchange for a little execution time.  However, BUILDFIXED should not be
-   used for threaded applications, since the rewriting of the tables and virgin
-   may not be thread-safe.
- */
-local void fixedtables(state)
-struct inflate_state FAR *state;
-{
-#ifdef BUILDFIXED
-    static int virgin = 1;
-    static code *lenfix, *distfix;
-    static code fixed[544];
-
-    /* build fixed huffman tables if first call (may not be thread safe) */
-    if (virgin) {
-        unsigned sym, bits;
-        static code *next;
-
-        /* literal/length table */
-        sym = 0;
-        while (sym < 144) state->lens[sym++] = 8;
-        while (sym < 256) state->lens[sym++] = 9;
-        while (sym < 280) state->lens[sym++] = 7;
-        while (sym < 288) state->lens[sym++] = 8;
-        next = fixed;
-        lenfix = next;
-        bits = 9;
-        inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
-
-        /* distance table */
-        sym = 0;
-        while (sym < 32) state->lens[sym++] = 5;
-        distfix = next;
-        bits = 5;
-        inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
-
-        /* do this just once */
-        virgin = 0;
-    }
-#else /* !BUILDFIXED */
-#   include "inffixed.h"
-#endif /* BUILDFIXED */
-    state->lencode = lenfix;
-    state->lenbits = 9;
-    state->distcode = distfix;
-    state->distbits = 5;
-}
-
-#ifdef MAKEFIXED
-#include <stdio.h>
-
-/*
-   Write out the inffixed.h that is #include'd above.  Defining MAKEFIXED also
-   defines BUILDFIXED, so the tables are built on the fly.  makefixed() writes
-   those tables to stdout, which would be piped to inffixed.h.  A small program
-   can simply call makefixed to do this:
-
-    void makefixed(void);
-
-    int main(void)
-    {
-        makefixed();
-        return 0;
-    }
-
-   Then that can be linked with zlib built with MAKEFIXED defined and run:
-
-    a.out > inffixed.h
- */
-void makefixed()
-{
-    unsigned low, size;
-    struct inflate_state state;
-
-    fixedtables(&state);
-    puts("    /* inffixed.h -- table for decoding fixed codes");
-    puts("     * Generated automatically by makefixed().");
-    puts("     */");
-    puts("");
-    puts("    /* WARNING: this file should *not* be used by applications.");
-    puts("       It is part of the implementation of this library and is");
-    puts("       subject to change. Applications should only use zlib.h.");
-    puts("     */");
-    puts("");
-    size = 1U << 9;
-    printf("    static const code lenfix[%u] = {", size);
-    low = 0;
-    for (;;) {
-        if ((low % 7) == 0) printf("\n        ");
-        printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,
-               state.lencode[low].val);
-        if (++low == size) break;
-        putchar(',');
-    }
-    puts("\n    };");
-    size = 1U << 5;
-    printf("\n    static const code distfix[%u] = {", size);
-    low = 0;
-    for (;;) {
-        if ((low % 6) == 0) printf("\n        ");
-        printf("{%u,%u,%d}", state.distcode[low].op, state.distcode[low].bits,
-               state.distcode[low].val);
-        if (++low == size) break;
-        putchar(',');
-    }
-    puts("\n    };");
-}
-#endif /* MAKEFIXED */
-
-/*
-   Update the window with the last wsize (normally 32K) bytes written before
-   returning.  If window does not exist yet, create it.  This is only called
-   when a window is already in use, or when output has been written during this
-   inflate call, but the end of the deflate stream has not been reached yet.
-   It is also called to create a window for dictionary data when a dictionary
-   is loaded.
-
-   Providing output buffers larger than 32K to inflate() should provide a speed
-   advantage, since only the last 32K of output is copied to the sliding window
-   upon return from inflate(), and since all distances after the first 32K of
-   output will fall in the output data, making match copies simpler and faster.
-   The advantage may be dependent on the size of the processor's data caches.
- */
-local int updatewindow(strm, out)
-z_streamp strm;
-unsigned out;
-{
-    struct inflate_state FAR *state;
-    unsigned copy, dist;
-
-    state = (struct inflate_state FAR *)strm->state;
-
-    /* if it hasn't been done already, allocate space for the window */
-    if (state->window == Z_NULL) {
-        state->window = (unsigned char FAR *)
-                        ZALLOC(strm, 1U << state->wbits,
-                               sizeof(unsigned char));
-        if (state->window == Z_NULL) return 1;
-    }
-
-    /* if window not in use yet, initialize */
-    if (state->wsize == 0) {
-        state->wsize = 1U << state->wbits;
-        state->write = 0;
-        state->whave = 0;
-    }
-
-    /* copy state->wsize or less output bytes into the circular window */
-    copy = out - strm->avail_out;
-    if (copy >= state->wsize) {
-        zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
-        state->write = 0;
-        state->whave = state->wsize;
-    }
-    else {
-        dist = state->wsize - state->write;
-        if (dist > copy) dist = copy;
-        zmemcpy(state->window + state->write, strm->next_out - copy, dist);
-        copy -= dist;
-        if (copy) {
-            zmemcpy(state->window, strm->next_out - copy, copy);
-            state->write = copy;
-            state->whave = state->wsize;
-        }
-        else {
-            state->write += dist;
-            if (state->write == state->wsize) state->write = 0;
-            if (state->whave < state->wsize) state->whave += dist;
-        }
-    }
-    return 0;
-}
-
-/* Macros for inflate(): */
-
-/* check function to use adler32() for zlib or crc32() for gzip */
-#ifdef GUNZIP
-#  define UPDATE(check, buf, len) \
-    (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
-#else
-#  define UPDATE(check, buf, len) adler32(check, buf, len)
-#endif
-
-/* check macros for header crc */
-#ifdef GUNZIP
-#  define CRC2(check, word) \
-    do { \
-        hbuf[0] = (unsigned char)(word); \
-        hbuf[1] = (unsigned char)((word) >> 8); \
-        check = crc32(check, hbuf, 2); \
-    } while (0)
-
-#  define CRC4(check, word) \
-    do { \
-        hbuf[0] = (unsigned char)(word); \
-        hbuf[1] = (unsigned char)((word) >> 8); \
-        hbuf[2] = (unsigned char)((word) >> 16); \
-        hbuf[3] = (unsigned char)((word) >> 24); \
-        check = crc32(check, hbuf, 4); \
-    } while (0)
-#endif
-
-/* Load registers with state in inflate() for speed */
-#define LOAD() \
-    do { \
-        put = strm->next_out; \
-        left = strm->avail_out; \
-        next = strm->next_in; \
-        have = strm->avail_in; \
-        hold = state->hold; \
-        bits = state->bits; \
-    } while (0)
-
-/* Restore state from registers in inflate() */
-#define RESTORE() \
-    do { \
-        strm->next_out = put; \
-        strm->avail_out = left; \
-        strm->next_in = next; \
-        strm->avail_in = have; \
-        state->hold = hold; \
-        state->bits = bits; \
-    } while (0)
-
-/* Clear the input bit accumulator */
-#define INITBITS() \
-    do { \
-        hold = 0; \
-        bits = 0; \
-    } while (0)
-
-/* Get a byte of input into the bit accumulator, or return from inflate()
-   if there is no input available. */
-#define PULLBYTE() \
-    do { \
-        if (have == 0) goto inf_leave; \
-        have--; \
-        hold += (unsigned long)(*next++) << bits; \
-        bits += 8; \
-    } while (0)
-
-/* Assure that there are at least n bits in the bit accumulator.  If there is
-   not enough available input to do that, then return from inflate(). */
-#define NEEDBITS(n) \
-    do { \
-        while (bits < (unsigned)(n)) \
-            PULLBYTE(); \
-    } while (0)
-
-/* Return the low n bits of the bit accumulator (n < 16) */
-#define BITS(n) \
-    ((unsigned)hold & ((1U << (n)) - 1))
-
-/* Remove n bits from the bit accumulator */
-#define DROPBITS(n) \
-    do { \
-        hold >>= (n); \
-        bits -= (unsigned)(n); \
-    } while (0)
-
-/* Remove zero to seven bits as needed to go to a byte boundary */
-#define BYTEBITS() \
-    do { \
-        hold >>= bits & 7; \
-        bits -= bits & 7; \
-    } while (0)
-
-/* Reverse the bytes in a 32-bit value */
-#define REVERSE(q) \
-    ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
-     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
-
-/*
-   inflate() uses a state machine to process as much input data and generate as
-   much output data as possible before returning.  The state machine is
-   structured roughly as follows:
-
-    for (;;) switch (state) {
-    ...
-    case STATEn:
-        if (not enough input data or output space to make progress)
-            return;
-        ... make progress ...
-        state = STATEm;
-        break;
-    ...
-    }
-
-   so when inflate() is called again, the same case is attempted again, and
-   if the appropriate resources are provided, the machine proceeds to the
-   next state.  The NEEDBITS() macro is usually the way the state evaluates
-   whether it can proceed or should return.  NEEDBITS() does the return if
-   the requested bits are not available.  The typical use of the BITS macros
-   is:
-
-        NEEDBITS(n);
-        ... do something with BITS(n) ...
-        DROPBITS(n);
-
-   where NEEDBITS(n) either returns from inflate() if there isn't enough
-   input left to load n bits into the accumulator, or it continues.  BITS(n)
-   gives the low n bits in the accumulator.  When done, DROPBITS(n) drops
-   the low n bits off the accumulator.  INITBITS() clears the accumulator
-   and sets the number of available bits to zero.  BYTEBITS() discards just
-   enough bits to put the accumulator on a byte boundary.  After BYTEBITS()
-   and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
-
-   NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
-   if there is no input available.  The decoding of variable length codes uses
-   PULLBYTE() directly in order to pull just enough bytes to decode the next
-   code, and no more.
-
-   Some states loop until they get enough input, making sure that enough
-   state information is maintained to continue the loop where it left off
-   if NEEDBITS() returns in the loop.  For example, want, need, and keep
-   would all have to actually be part of the saved state in case NEEDBITS()
-   returns:
-
-    case STATEw:
-        while (want < need) {
-            NEEDBITS(n);
-            keep[want++] = BITS(n);
-            DROPBITS(n);
-        }
-        state = STATEx;
-    case STATEx:
-
-   As shown above, if the next state is also the next case, then the break
-   is omitted.
-
-   A state may also return if there is not enough output space available to
-   complete that state.  Those states are copying stored data, writing a
-   literal byte, and copying a matching string.
-
-   When returning, a "goto inf_leave" is used to update the total counters,
-   update the check value, and determine whether any progress has been made
-   during that inflate() call in order to return the proper return code.
-   Progress is defined as a change in either strm->avail_in or strm->avail_out.
-   When there is a window, goto inf_leave will update the window with the last
-   output written.  If a goto inf_leave occurs in the middle of decompression
-   and there is no window currently, goto inf_leave will create one and copy
-   output to the window for the next call of inflate().
-
-   In this implementation, the flush parameter of inflate() only affects the
-   return code (per zlib.h).  inflate() always writes as much as possible to
-   strm->next_out, given the space available and the provided input--the effect
-   documented in zlib.h of Z_SYNC_FLUSH.  Furthermore, inflate() always defers
-   the allocation of and copying into a sliding window until necessary, which
-   provides the effect documented in zlib.h for Z_FINISH when the entire input
-   stream available.  So the only thing the flush parameter actually does is:
-   when flush is set to Z_FINISH, inflate() cannot return Z_OK.  Instead it
-   will return Z_BUF_ERROR if it has not reached the end of the stream.
- */
-
-int ZEXPORT inflate(strm, flush)
-z_streamp strm;
-int flush;
-{
-    struct inflate_state FAR *state;
-    unsigned char FAR *next;    /* next input */
-    unsigned char FAR *put;     /* next output */
-    unsigned have, left;        /* available input and output */
-    unsigned long hold;         /* bit buffer */
-    unsigned bits;              /* bits in bit buffer */
-    unsigned in, out;           /* save starting available input and output */
-    unsigned copy;              /* number of stored or match bytes to copy */
-    unsigned char FAR *from;    /* where to copy match bytes from */
-    code this;                  /* current decoding table entry */
-    code last;                  /* parent table entry */
-    unsigned len;               /* length to copy for repeats, bits to drop */
-    int ret;                    /* return code */
-#ifdef GUNZIP
-    unsigned char hbuf[4];      /* buffer for gzip header crc calculation */
-#endif
-    static const unsigned short order[19] = /* permutation of code lengths */
-        {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
-
-    if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
-        (strm->next_in == Z_NULL && strm->avail_in != 0))
-        return Z_STREAM_ERROR;
-
-    state = (struct inflate_state FAR *)strm->state;
-    if (state->mode == TYPE) state->mode = TYPEDO;      /* skip check */
-    LOAD();
-    in = have;
-    out = left;
-    ret = Z_OK;
-    for (;;)
-        switch (state->mode) {
-        case HEAD:
-            if (state->wrap == 0) {
-                state->mode = TYPEDO;
-                break;
-            }
-            NEEDBITS(16);
-#ifdef GUNZIP
-            if ((state->wrap & 2) && hold == 0x8b1f) {  /* gzip header */
-                state->check = crc32(0L, Z_NULL, 0);
-                CRC2(state->check, hold);
-                INITBITS();
-                state->mode = FLAGS;
-                break;
-            }
-            state->flags = 0;           /* expect zlib header */
-            if (state->head != Z_NULL)
-                state->head->done = -1;
-            if (!(state->wrap & 1) ||   /* check if zlib header allowed */
-#else
-            if (
-#endif
-                ((BITS(8) << 8) + (hold >> 8)) % 31) {
-                strm->msg = (char *)"incorrect header check";
-                state->mode = BAD;
-                break;
-            }
-            if (BITS(4) != Z_DEFLATED) {
-                strm->msg = (char *)"unknown compression method";
-                state->mode = BAD;
-                break;
-            }
-            DROPBITS(4);
-            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;
-            INITBITS();
-            break;
-#ifdef GUNZIP
-        case FLAGS:
-            NEEDBITS(16);
-            state->flags = (int)(hold);
-            if ((state->flags & 0xff) != Z_DEFLATED) {
-                strm->msg = (char *)"unknown compression method";
-                state->mode = BAD;
-                break;
-            }
-            if (state->flags & 0xe000) {
-                strm->msg = (char *)"unknown header flags set";
-                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;
-        case EXLEN:
-            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;
-                    next += copy;
-                    state->length -= copy;
-                }
-                if (state->length) goto inf_leave;
-            }
-            state->length = 0;
-            state->mode = NAME;
-        case NAME:
-            if (state->flags & 0x0800) {
-                if (have == 0) goto inf_leave;
-                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 & 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) {
-                if (have == 0) goto inf_leave;
-                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 & 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) {
-                NEEDBITS(16);
-                if (hold != (state->check & 0xffff)) {
-                    strm->msg = (char *)"header crc mismatch";
-                    state->mode = BAD;
-                    break;
-                }
-                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;
-#endif
-        case DICTID:
-            NEEDBITS(32);
-            strm->adler = state->check = REVERSE(hold);
-            INITBITS();
-            state->mode = DICT;
-        case DICT:
-            if (state->havedict == 0) {
-                RESTORE();
-                return Z_NEED_DICT;
-            }
-            strm->adler = state->check = adler32(0L, Z_NULL, 0);
-            state->mode = TYPE;
-        case TYPE:
-            if (flush == Z_BLOCK) goto inf_leave;
-        case TYPEDO:
-            if (state->last) {
-                BYTEBITS();
-                state->mode = CHECK;
-                break;
-            }
-            NEEDBITS(3);
-            state->last = BITS(1);
-            DROPBITS(1);
-            switch (BITS(2)) {
-            case 0:                             /* stored block */
-                Tracev((stderr, "inflate:     stored block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = STORED;
-                break;
-            case 1:                             /* fixed block */
-                fixedtables(state);
-                Tracev((stderr, "inflate:     fixed codes block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = LEN;              /* decode codes */
-                break;
-            case 2:                             /* dynamic block */
-                Tracev((stderr, "inflate:     dynamic codes block%s\n",
-                        state->last ? " (last)" : ""));
-                state->mode = TABLE;
-                break;
-            case 3:
-                strm->msg = (char *)"invalid block type";
-                state->mode = BAD;
-            }
-            DROPBITS(2);
-            break;
-        case STORED:
-            BYTEBITS();                         /* go to byte boundary */
-            NEEDBITS(32);
-            if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
-                strm->msg = (char *)"invalid stored block lengths";
-                state->mode = BAD;
-                break;
-            }
-            state->length = (unsigned)hold & 0xffff;
-            Tracev((stderr, "inflate:       stored length %u\n",
-                    state->length));
-            INITBITS();
-            state->mode = COPY;
-        case COPY:
-            copy = state->length;
-            if (copy) {
-                if (copy > have) copy = have;
-                if (copy > left) copy = left;
-                if (copy == 0) goto inf_leave;
-                zmemcpy(put, next, copy);
-                have -= copy;
-                next += copy;
-                left -= copy;
-                put += copy;
-                state->length -= copy;
-                break;
-            }
-            Tracev((stderr, "inflate:       stored end\n"));
-            state->mode = TYPE;
-            break;
-        case TABLE:
-            NEEDBITS(14);
-            state->nlen = BITS(5) + 257;
-            DROPBITS(5);
-            state->ndist = BITS(5) + 1;
-            DROPBITS(5);
-            state->ncode = BITS(4) + 4;
-            DROPBITS(4);
-#ifndef PKZIP_BUG_WORKAROUND
-            if (state->nlen > 286 || state->ndist > 30) {
-                strm->msg = (char *)"too many length or distance symbols";
-                state->mode = BAD;
-                break;
-            }
-#endif
-            Tracev((stderr, "inflate:       table sizes ok\n"));
-            state->have = 0;
-            state->mode = LENLENS;
-        case LENLENS:
-            while (state->have < state->ncode) {
-                NEEDBITS(3);
-                state->lens[order[state->have++]] = (unsigned short)BITS(3);
-                DROPBITS(3);
-            }
-            while (state->have < 19)
-                state->lens[order[state->have++]] = 0;
-            state->next = state->codes;
-            state->lencode = (code const FAR *)(state->next);
-            state->lenbits = 7;
-            ret = inflate_table(CODES, state->lens, 19, &(state->next),
-                                &(state->lenbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid code lengths set";
-                state->mode = BAD;
-                break;
-            }
-            Tracev((stderr, "inflate:       code lengths ok\n"));
-            state->have = 0;
-            state->mode = CODELENS;
-        case CODELENS:
-            while (state->have < state->nlen + state->ndist) {
-                for (;;) {
-                    this = state->lencode[BITS(state->lenbits)];
-                    if ((unsigned)(this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                if (this.val < 16) {
-                    NEEDBITS(this.bits);
-                    DROPBITS(this.bits);
-                    state->lens[state->have++] = this.val;
-                }
-                else {
-                    if (this.val == 16) {
-                        NEEDBITS(this.bits + 2);
-                        DROPBITS(this.bits);
-                        if (state->have == 0) {
-                            strm->msg = (char *)"invalid bit length repeat";
-                            state->mode = BAD;
-                            break;
-                        }
-                        len = state->lens[state->have - 1];
-                        copy = 3 + BITS(2);
-                        DROPBITS(2);
-                    }
-                    else if (this.val == 17) {
-                        NEEDBITS(this.bits + 3);
-                        DROPBITS(this.bits);
-                        len = 0;
-                        copy = 3 + BITS(3);
-                        DROPBITS(3);
-                    }
-                    else {
-                        NEEDBITS(this.bits + 7);
-                        DROPBITS(this.bits);
-                        len = 0;
-                        copy = 11 + BITS(7);
-                        DROPBITS(7);
-                    }
-                    if (state->have + copy > state->nlen + state->ndist) {
-                        strm->msg = (char *)"invalid bit length repeat";
-                        state->mode = BAD;
-                        break;
-                    }
-                    while (copy--)
-                        state->lens[state->have++] = (unsigned short)len;
-                }
-            }
-
-            /* handle error breaks in while */
-            if (state->mode == BAD) break;
-
-            /* build code tables */
-            state->next = state->codes;
-            state->lencode = (code const FAR *)(state->next);
-            state->lenbits = 9;
-            ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
-                                &(state->lenbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid literal/lengths set";
-                state->mode = BAD;
-                break;
-            }
-            state->distcode = (code const FAR *)(state->next);
-            state->distbits = 6;
-            ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
-                            &(state->next), &(state->distbits), state->work);
-            if (ret) {
-                strm->msg = (char *)"invalid distances set";
-                state->mode = BAD;
-                break;
-            }
-            Tracev((stderr, "inflate:       codes ok\n"));
-            state->mode = LEN;
-        case LEN:
-            if (have >= 6 && left >= 258) {
-                RESTORE();
-                inflate_fast(strm, out);
-                LOAD();
-                break;
-            }
-            for (;;) {
-                this = state->lencode[BITS(state->lenbits)];
-                if ((unsigned)(this.bits) <= bits) break;
-                PULLBYTE();
-            }
-            if (this.op && (this.op & 0xf0) == 0) {
-                last = this;
-                for (;;) {
-                    this = state->lencode[last.val +
-                            (BITS(last.bits + last.op) >> last.bits)];
-                    if ((unsigned)(last.bits + this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                DROPBITS(last.bits);
-            }
-            DROPBITS(this.bits);
-            state->length = (unsigned)this.val;
-            if ((int)(this.op) == 0) {
-                Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
-                        "inflate:         literal '%c'\n" :
-                        "inflate:         literal 0x%02x\n", this.val));
-                state->mode = LIT;
-                break;
-            }
-            if (this.op & 32) {
-                Tracevv((stderr, "inflate:         end of block\n"));
-                state->mode = TYPE;
-                break;
-            }
-            if (this.op & 64) {
-                strm->msg = (char *)"invalid literal/length code";
-                state->mode = BAD;
-                break;
-            }
-            state->extra = (unsigned)(this.op) & 15;
-            state->mode = LENEXT;
-        case LENEXT:
-            if (state->extra) {
-                NEEDBITS(state->extra);
-                state->length += BITS(state->extra);
-                DROPBITS(state->extra);
-            }
-            Tracevv((stderr, "inflate:         length %u\n", state->length));
-            state->mode = DIST;
-        case DIST:
-            for (;;) {
-                this = state->distcode[BITS(state->distbits)];
-                if ((unsigned)(this.bits) <= bits) break;
-                PULLBYTE();
-            }
-            if ((this.op & 0xf0) == 0) {
-                last = this;
-                for (;;) {
-                    this = state->distcode[last.val +
-                            (BITS(last.bits + last.op) >> last.bits)];
-                    if ((unsigned)(last.bits + this.bits) <= bits) break;
-                    PULLBYTE();
-                }
-                DROPBITS(last.bits);
-            }
-            DROPBITS(this.bits);
-            if (this.op & 64) {
-                strm->msg = (char *)"invalid distance code";
-                state->mode = BAD;
-                break;
-            }
-            state->offset = (unsigned)this.val;
-            state->extra = (unsigned)(this.op) & 15;
-            state->mode = DISTEXT;
-        case DISTEXT:
-            if (state->extra) {
-                NEEDBITS(state->extra);
-                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;
-                break;
-            }
-            Tracevv((stderr, "inflate:         distance %u\n", state->offset));
-            state->mode = MATCH;
-        case MATCH:
-            if (left == 0) goto inf_leave;
-            copy = out - left;
-            if (state->offset > copy) {         /* copy from window */
-                copy = state->offset - copy;
-                if (copy > state->write) {
-                    copy -= state->write;
-                    from = state->window + (state->wsize - copy);
-                }
-                else
-                    from = state->window + (state->write - copy);
-                if (copy > state->length) copy = state->length;
-            }
-            else {                              /* copy from output */
-                from = put - state->offset;
-                copy = state->length;
-            }
-            if (copy > left) copy = left;
-            left -= copy;
-            state->length -= copy;
-            do {
-                *put++ = *from++;
-            } while (--copy);
-            if (state->length == 0) state->mode = LEN;
-            break;
-        case LIT:
-            if (left == 0) goto inf_leave;
-            *put++ = (unsigned char)(state->length);
-            left--;
-            state->mode = LEN;
-            break;
-        case CHECK:
-            if (state->wrap) {
-                NEEDBITS(32);
-                out -= left;
-                strm->total_out += out;
-                state->total += out;
-                if (out)
-                    strm->adler = state->check =
-                        UPDATE(state->check, put - out, out);
-                out = left;
-                if ((
-#ifdef GUNZIP
-                     state->flags ? hold :
-#endif
-                     REVERSE(hold)) != state->check) {
-                    strm->msg = (char *)"incorrect data check";
-                    state->mode = BAD;
-                    break;
-                }
-                INITBITS();
-                Tracev((stderr, "inflate:   check matches trailer\n"));
-            }
-#ifdef GUNZIP
-            state->mode = LENGTH;
-        case LENGTH:
-            if (state->wrap && state->flags) {
-                NEEDBITS(32);
-                if (hold != (state->total & 0xffffffffUL)) {
-                    strm->msg = (char *)"incorrect length check";
-                    state->mode = BAD;
-                    break;
-                }
-                INITBITS();
-                Tracev((stderr, "inflate:   length matches trailer\n"));
-            }
-#endif
-            state->mode = DONE;
-        case DONE:
-            ret = Z_STREAM_END;
-            goto inf_leave;
-        case BAD:
-            ret = Z_DATA_ERROR;
-            goto inf_leave;
-        case MEM:
-            return Z_MEM_ERROR;
-        case SYNC:
-        default:
-            return Z_STREAM_ERROR;
-        }
-
-    /*
-       Return from inflate(), updating the total counts and the check value.
-       If there was no progress during the inflate() call, return a buffer
-       error.  Call updatewindow() to create and/or update the window state.
-       Note: a memory error from inflate() is non-recoverable.
-     */
-  inf_leave:
-    RESTORE();
-    if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
-        if (updatewindow(strm, out)) {
-            state->mode = MEM;
-            return Z_MEM_ERROR;
-        }
-    in -= strm->avail_in;
-    out -= strm->avail_out;
-    strm->total_in += in;
-    strm->total_out += out;
-    state->total += out;
-    if (state->wrap && out)
-        strm->adler = state->check =
-            UPDATE(state->check, strm->next_out - out, out);
-    strm->data_type = state->bits + (state->last ? 64 : 0) +
-                      (state->mode == TYPE ? 128 : 0);
-    if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
-        ret = Z_BUF_ERROR;
-    return ret;
-}
-
-int ZEXPORT inflateEnd(strm)
-z_streamp strm;
-{
-    struct inflate_state FAR *state;
-    if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
-        return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    if (state->window != Z_NULL) ZFREE(strm, state->window);
-    ZFREE(strm, strm->state);
-    strm->state = Z_NULL;
-    Tracev((stderr, "inflate: end\n"));
-    return Z_OK;
-}
-
-int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
-z_streamp strm;
-const Bytef *dictionary;
-uInt dictLength;
-{
-    struct inflate_state FAR *state;
-    unsigned long id;
-
-    /* check state */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    if (state->wrap != 0 && state->mode != DICT)
-        return Z_STREAM_ERROR;
-
-    /* check for correct dictionary id */
-    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)) {
-        state->mode = MEM;
-        return Z_MEM_ERROR;
-    }
-    if (dictLength > state->wsize) {
-        zmemcpy(state->window, dictionary + dictLength - state->wsize,
-                state->wsize);
-        state->whave = state->wsize;
-    }
-    else {
-        zmemcpy(state->window + state->wsize - dictLength, dictionary,
-                dictLength);
-        state->whave = dictLength;
-    }
-    state->havedict = 1;
-    Tracev((stderr, "inflate:   dictionary set\n"));
-    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
-   found in order so far, in 0..3.  On return *have is updated to the new
-   state.  If on return *have equals four, then the pattern was found and the
-   return value is how many bytes were read including the last byte of the
-   pattern.  If *have is less than four, then the pattern has not been found
-   yet and the return value is len.  In the latter case, syncsearch() can be
-   called again with more data and the *have state.  *have is initialized to
-   zero for the first call.
- */
-local unsigned syncsearch(have, buf, len)
-unsigned FAR *have;
-unsigned char FAR *buf;
-unsigned len;
-{
-    unsigned got;
-    unsigned next;
-
-    got = *have;
-    next = 0;
-    while (next < len && got < 4) {
-        if ((int)(buf[next]) == (got < 2 ? 0 : 0xff))
-            got++;
-        else if (buf[next])
-            got = 0;
-        else
-            got = 4 - got;
-        next++;
-    }
-    *have = got;
-    return next;
-}
-
-int ZEXPORT inflateSync(strm)
-z_streamp strm;
-{
-    unsigned len;               /* number of bytes to look at or looked at */
-    unsigned long in, out;      /* temporary to save total_in and total_out */
-    unsigned char buf[4];       /* to restore bit buffer to byte string */
-    struct inflate_state FAR *state;
-
-    /* check parameters */
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
-
-    /* if first time, start search in bit buffer */
-    if (state->mode != SYNC) {
-        state->mode = SYNC;
-        state->hold <<= state->bits & 7;
-        state->bits -= state->bits & 7;
-        len = 0;
-        while (state->bits >= 8) {
-            buf[len++] = (unsigned char)(state->hold);
-            state->hold >>= 8;
-            state->bits -= 8;
-        }
-        state->have = 0;
-        syncsearch(&(state->have), buf, len);
-    }
-
-    /* search available input */
-    len = syncsearch(&(state->have), strm->next_in, strm->avail_in);
-    strm->avail_in -= len;
-    strm->next_in += len;
-    strm->total_in += len;
-
-    /* return no joy or set up to restart inflate() on a new block */
-    if (state->have != 4) return Z_DATA_ERROR;
-    in = strm->total_in;  out = strm->total_out;
-    inflateReset(strm);
-    strm->total_in = in;  strm->total_out = out;
-    state->mode = TYPE;
-    return Z_OK;
-}
-
-/*
-   Returns true if inflate is currently at the end of a block generated by
-   Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
-   implementation to provide an additional safety check. PPP uses
-   Z_SYNC_FLUSH but removes the length bytes of the resulting empty stored
-   block. When decompressing, PPP checks that at the end of input packet,
-   inflate is waiting for these length bytes.
- */
-int ZEXPORT inflateSyncPoint(strm)
-z_streamp strm;
-{
-    struct inflate_state FAR *state;
-
-    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)strm->state;
-    return state->mode == STORED && state->bits == 0;
-}
-
-int ZEXPORT inflateCopy(dest, source)
-z_streamp dest;
-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 ||
-        source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
-        return Z_STREAM_ERROR;
-    state = (struct inflate_state FAR *)source->state;
-
-    /* allocate space */
-    copy = (struct inflate_state FAR *)
-           ZALLOC(source, 1, sizeof(struct inflate_state));
-    if (copy == Z_NULL) return Z_MEM_ERROR;
-    window = Z_NULL;
-    if (state->window != Z_NULL) {
-        window = (unsigned char FAR *)
-                 ZALLOC(source, 1U << state->wbits, sizeof(unsigned char));
-        if (window == Z_NULL) {
-            ZFREE(source, copy);
-            return Z_MEM_ERROR;
-        }
-    }
-
-    /* copy state */
-    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) {
-        wsize = 1U << state->wbits;
-        zmemcpy(window, state->window, wsize);
-    }
-    copy->window = window;
-    dest->state = (struct internal_state FAR *)copy;
-    return Z_OK;
-}