linux-imx

/* inflate.c -- zlib decompression

 * Copyright (C) 1995-2005 Mark Adler

 * For conditions of distribution and use, see copyright notice in zlib.h

 *

 * Based on zlib 1.2.3 but modified for the Linux Kernel by

 * Richard Purdie <richard@openedhand.com>

 *

 * Changes mainly for static instead of dynamic memory allocation

 *

 */

​

#include <linux/zutil.h>

#include "inftrees.h"

#include "inflate.h"

#include "inffast.h"

#include "infutil.h"

​

int zlib_inflate_workspacesize(void)

{

    return sizeof(struct inflate_workspace);

}

​

int zlib_inflateReset(z_streamp strm)

{

    struct inflate_state *state;

​

    if (strm == NULL || strm->state == NULL) return Z_STREAM_ERROR;

    state = (struct inflate_state *)strm->state;

    strm->total_in = strm->total_out = state->total = 0;

    strm->msg = NULL;

    strm->adler = 1;        /* to support ill-conceived Java test suite */

    state->mode = HEAD;

    state->last = 0;

    state->havedict = 0;

    state->dmax = 32768U;

    state->hold = 0;

    state->bits = 0;

    state->lencode = state->distcode = state->next = state->codes;

​

    /* Initialise Window */

    state->wsize = 1U << state->wbits;

    state->write = 0;

    state->whave = 0;

​

    return Z_OK;

}

​

int zlib_inflateInit2(z_streamp strm, int windowBits)

{

    struct inflate_state *state;

​

    if (strm == NULL) return Z_STREAM_ERROR;

    strm->msg = NULL;                 /* in case we return an error */

​

    state = &WS(strm)->inflate_state;

    strm->state = (struct internal_state *)state;

​

    if (windowBits < 0) {

        state->wrap = 0;

        windowBits = -windowBits;

    }

    else {

        state->wrap = (windowBits >> 4) + 1;