/* tinfl.c v1.11 - public domain inflate with zlib header parsing/adler32 checking (inflate-only subset of miniz.c)

   See "unlicense" statement at the end of this file.

   Rich Geldreich <richgel99@gmail.com>, last updated May 20, 2011

   Implements RFC 1950: http://www.ietf.org/rfc/rfc1950.txt and RFC 1951: http://www.ietf.org/rfc/rfc1951.txt

   The entire decompressor coroutine is implemented in tinfl_decompress(). The other functions are optional high-level helpers.

*/

#ifndef TINFL_HEADER_INCLUDED

#define TINFL_HEADER_INCLUDED

typedef PHYSFS_uint8 mz_uint8;

typedef PHYSFS_sint16 mz_int16;

typedef PHYSFS_uint16 mz_uint16;

typedef PHYSFS_uint32 mz_uint32;

typedef PHYSFS_uint64 mz_uint64;

/* For more compatibility with zlib, miniz.c uses unsigned long for some parameters/struct members. */

typedef unsigned long mz_ulong;

/* Heap allocation callbacks. */

typedef void *(*mz_alloc_func)(void *opaque, unsigned int items, unsigned int size);

typedef void (*mz_free_func)(void *opaque, void *address);

#if defined(_M_IX86) || defined(_M_X64)

/* Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES to 1 if integer loads and stores to unaligned addresses are acceptable on the target platform (slightly faster). */

#define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 1

/* Set MINIZ_LITTLE_ENDIAN to 1 if the processor is little endian. */

#define MINIZ_LITTLE_ENDIAN 1

#endif

#if defined(_WIN64) || defined(__MINGW64__) || defined(_LP64) || defined(__LP64__)

/* Set MINIZ_HAS_64BIT_REGISTERS to 1 if the processor has 64-bit general purpose registers (enables 64-bit bitbuffer in inflator) */

#define MINIZ_HAS_64BIT_REGISTERS 1

#endif

/* Works around MSVC's spammy "warning C4127: conditional expression is constant" message. */

#ifdef _MSC_VER

#define MZ_MACRO_END while (0, 0)

#else

#define MZ_MACRO_END while (0)

#endif

/* Decompression flags. */

enum

{

  TINFL_FLAG_PARSE_ZLIB_HEADER = 1,

  TINFL_FLAG_HAS_MORE_INPUT = 2,

  TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF = 4,

  TINFL_FLAG_COMPUTE_ADLER32 = 8

};

struct tinfl_decompressor_tag; typedef struct tinfl_decompressor_tag tinfl_decompressor;

/* Max size of LZ dictionary. */

#define TINFL_LZ_DICT_SIZE 32768

/* Return status. */

typedef enum

{

  TINFL_STATUS_BAD_PARAM = -3,

  TINFL_STATUS_ADLER32_MISMATCH = -2,

  TINFL_STATUS_FAILED = -1,

  TINFL_STATUS_DONE = 0,

  TINFL_STATUS_NEEDS_MORE_INPUT = 1,

  TINFL_STATUS_HAS_MORE_OUTPUT = 2

} tinfl_status;

/* Initializes the decompressor to its initial state. */

#define tinfl_init(r) do { (r)->m_state = 0; } MZ_MACRO_END

#define tinfl_get_adler32(r) (r)->m_check_adler32

/* Main low-level decompressor coroutine function. This is the only function actually needed for decompression. All the other functions are just high-level helpers for improved usability. */

/* This is a universal API, i.e. it can be used as a building block to build any desired higher level decompression API. In the limit case, it can be called once per every byte input or output. */

static tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_next, size_t *pIn_buf_size, mz_uint8 *pOut_buf_start, mz_uint8 *pOut_buf_next, size_t *pOut_buf_size, const mz_uint32 decomp_flags);

/* Internal/private bits follow. */

enum

{

  TINFL_MAX_HUFF_TABLES = 3, TINFL_MAX_HUFF_SYMBOLS_0 = 288, TINFL_MAX_HUFF_SYMBOLS_1 = 32, TINFL_MAX_HUFF_SYMBOLS_2 = 19,

  TINFL_FAST_LOOKUP_BITS = 10, TINFL_FAST_LOOKUP_SIZE = 1 << TINFL_FAST_LOOKUP_BITS

};

typedef struct

{

  mz_uint8 m_code_size[TINFL_MAX_HUFF_SYMBOLS_0];

  mz_int16 m_look_up[TINFL_FAST_LOOKUP_SIZE], m_tree[TINFL_MAX_HUFF_SYMBOLS_0 * 2];

} tinfl_huff_table;

#if MINIZ_HAS_64BIT_REGISTERS

  #define TINFL_USE_64BIT_BITBUF 1

#endif

#if TINFL_USE_64BIT_BITBUF

  typedef mz_uint64 tinfl_bit_buf_t;

  #define TINFL_BITBUF_SIZE (64)

#else

  typedef mz_uint32 tinfl_bit_buf_t;

  #define TINFL_BITBUF_SIZE (32)

#endif

struct tinfl_decompressor_tag

{

  mz_uint32 m_state, m_num_bits, m_zhdr0, m_zhdr1, m_z_adler32, m_final, m_type, m_check_adler32, m_dist, m_counter, m_num_extra, m_table_sizes[TINFL_MAX_HUFF_TABLES];

  tinfl_bit_buf_t m_bit_buf;

  size_t m_dist_from_out_buf_start;

  tinfl_huff_table m_tables[TINFL_MAX_HUFF_TABLES];

  mz_uint8 m_raw_header[4], m_len_codes[TINFL_MAX_HUFF_SYMBOLS_0 + TINFL_MAX_HUFF_SYMBOLS_1 + 137];

};

#endif /* #ifdef TINFL_HEADER_INCLUDED */

/* ------------------- End of Header: Implementation follows. (If you only want the header, define MINIZ_HEADER_FILE_ONLY.) */

#ifndef TINFL_HEADER_FILE_ONLY

#define MZ_MAX(a,b) (((a)>(b))?(a):(b))

#define MZ_MIN(a,b) (((a)<(b))?(a):(b))

#define MZ_CLEAR_OBJ(obj) memset(&(obj), 0, sizeof(obj))

#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN

  #define MZ_READ_LE16(p) *((const mz_uint16 *)(p))

  #define MZ_READ_LE32(p) *((const mz_uint32 *)(p))

#else

  #define MZ_READ_LE16(p) ((mz_uint32)(((const mz_uint8 *)(p))[0]) | ((mz_uint32)(((const mz_uint8 *)(p))[1]) << 8U))

  #define MZ_READ_LE32(p) ((mz_uint32)(((const mz_uint8 *)(p))[0]) | ((mz_uint32)(((const mz_uint8 *)(p))[1]) << 8U) | ((mz_uint32)(((const mz_uint8 *)(p))[2]) << 16U) | ((mz_uint32)(((const mz_uint8 *)(p))[3]) << 24U))

#endif

#define TINFL_MEMCPY(d, s, l) memcpy(d, s, l)

#define TINFL_MEMSET(p, c, l) memset(p, c, l)

#define TINFL_CR_BEGIN switch(r->m_state) { case 0:

#define TINFL_CR_RETURN(state_index, result) do { status = result; r->m_state = state_index; goto common_exit; case state_index:; } MZ_MACRO_END

#define TINFL_CR_RETURN_FOREVER(state_index, result) do { for ( ; ; ) { TINFL_CR_RETURN(state_index, result); } } MZ_MACRO_END

#define TINFL_CR_FINISH }

/* TODO: If the caller has indicated that there's no more input, and we attempt to read beyond the input buf, then something is wrong with the input because the inflator never */

/* reads ahead more than it needs to. Currently TINFL_GET_BYTE() pads the end of the stream with 0's in this scenario. */

#define TINFL_GET_BYTE(state_index, c) do { \

  if (pIn_buf_cur >= pIn_buf_end) { \

    for ( ; ; ) { \

      if (decomp_flags & TINFL_FLAG_HAS_MORE_INPUT) { \

        TINFL_CR_RETURN(state_index, TINFL_STATUS_NEEDS_MORE_INPUT); \

        if (pIn_buf_cur < pIn_buf_end) { \

          c = *pIn_buf_cur++; \

          break; \

        } \

      } else { \

        c = 0; \

        break; \

      } \

    } \

  } else c = *pIn_buf_cur++; } MZ_MACRO_END

#define TINFL_NEED_BITS(state_index, n) do { mz_uint c; TINFL_GET_BYTE(state_index, c); bit_buf |= (((tinfl_bit_buf_t)c) << num_bits); num_bits += 8; } while (num_bits < (mz_uint)(n))

#define TINFL_SKIP_BITS(state_index, n) do { if (num_bits < (mz_uint)(n)) { TINFL_NEED_BITS(state_index, n); } bit_buf >>= (n); num_bits -= (n); } MZ_MACRO_END

#define TINFL_GET_BITS(state_index, b, n) do { if (num_bits < (mz_uint)(n)) { TINFL_NEED_BITS(state_index, n); } b = bit_buf & ((1 << (n)) - 1); bit_buf >>= (n); num_bits -= (n); } MZ_MACRO_END

/* TINFL_HUFF_BITBUF_FILL() is only used rarely, when the number of bytes remaining in the input buffer falls below 2. */

/* It reads just enough bytes from the input stream that are needed to decode the next Huffman code (and absolutely no more). It works by trying to fully decode a */

/* Huffman code by using whatever bits are currently present in the bit buffer. If this fails, it reads another byte, and tries again until it succeeds or until the */

/* bit buffer contains >=15 bits (deflate's max. Huffman code size). */

#define TINFL_HUFF_BITBUF_FILL(state_index, pHuff) \

  do { \

    temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]; \

    if (temp >= 0) { \

      code_len = temp >> 9; \

      if ((code_len) && (num_bits >= code_len)) \

      break; \

    } else if (num_bits > TINFL_FAST_LOOKUP_BITS) { \

       code_len = TINFL_FAST_LOOKUP_BITS; \

       do { \

          temp = (pHuff)->m_tree[~temp + ((bit_buf >> code_len++) & 1)]; \

       } while ((temp < 0) && (num_bits >= (code_len + 1))); if (temp >= 0) break; \

    } TINFL_GET_BYTE(state_index, c); bit_buf |= (((tinfl_bit_buf_t)c) << num_bits); num_bits += 8; \

  } while (num_bits < 15);

/* TINFL_HUFF_DECODE() decodes the next Huffman coded symbol. It's more complex than you would initially expect because the zlib API expects the decompressor to never read */

/* beyond the final byte of the deflate stream. (In other words, when this macro wants to read another byte from the input, it REALLY needs another byte in order to fully */

/* decode the next Huffman code.) Handling this properly is particularly important on raw deflate (non-zlib) streams, which aren't followed by a byte aligned adler-32. */

/* The slow path is only executed at the very end of the input buffer. */

#define TINFL_HUFF_DECODE(state_index, sym, pHuff) do { \

  int temp; mz_uint code_len, c; \

  if (num_bits < 15) { \

    if ((pIn_buf_end - pIn_buf_cur) < 2) { \

       TINFL_HUFF_BITBUF_FILL(state_index, pHuff); \

    } else { \

       bit_buf |= (((tinfl_bit_buf_t)pIn_buf_cur[0]) << num_bits) | (((tinfl_bit_buf_t)pIn_buf_cur[1]) << (num_bits + 8)); pIn_buf_cur += 2; num_bits += 16; \

    } \

  } \

  if ((temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0) \

    code_len = temp >> 9, temp &= 511; \

  else { \

    code_len = TINFL_FAST_LOOKUP_BITS; do { temp = (pHuff)->m_tree[~temp + ((bit_buf >> code_len++) & 1)]; } while (temp < 0); \

  } sym = temp; bit_buf >>= code_len; num_bits -= code_len; } MZ_MACRO_END

static tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_next, size_t *pIn_buf_size, mz_uint8 *pOut_buf_start, mz_uint8 *pOut_buf_next, size_t *pOut_buf_size, const mz_uint32 decomp_flags)

{

  static const int s_length_base[31] = { 3,4,5,6,7,8,9,10,11,13, 15,17,19,23,27,31,35,43,51,59, 67,83,99,115,131,163,195,227,258,0,0 };

  static const int s_length_extra[31]= { 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };

  static const int s_dist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, 257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};

  static const int s_dist_extra[32] = { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};

  static const mz_uint8 s_length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };

  static const int s_min_table_sizes[3] = { 257, 1, 4 };

  tinfl_status status = TINFL_STATUS_FAILED; mz_uint32 num_bits, dist, counter, num_extra; tinfl_bit_buf_t bit_buf;

  const mz_uint8 *pIn_buf_cur = pIn_buf_next, *const pIn_buf_end = pIn_buf_next + *pIn_buf_size;

  mz_uint8 *pOut_buf_cur = pOut_buf_next, *const pOut_buf_end = pOut_buf_next + *pOut_buf_size;

  size_t out_buf_size_mask = (decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF) ? (size_t)-1 : ((pOut_buf_next - pOut_buf_start) + *pOut_buf_size) - 1, dist_from_out_buf_start;

  /* Ensure the output buffer's size is a power of 2, unless the output buffer is large enough to hold the entire output file (in which case it doesn't matter). */

  if (((out_buf_size_mask + 1) & out_buf_size_mask) || (pOut_buf_next < pOut_buf_start)) { *pIn_buf_size = *pOut_buf_size = 0; return TINFL_STATUS_BAD_PARAM; }

  num_bits = r->m_num_bits; bit_buf = r->m_bit_buf; dist = r->m_dist; counter = r->m_counter; num_extra = r->m_num_extra; dist_from_out_buf_start = r->m_dist_from_out_buf_start;

  TINFL_CR_BEGIN

  bit_buf = num_bits = dist = counter = num_extra = r->m_zhdr0 = r->m_zhdr1 = 0; r->m_z_adler32 = r->m_check_adler32 = 1;

  if (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER)

  {

    TINFL_GET_BYTE(1, r->m_zhdr0); TINFL_GET_BYTE(2, r->m_zhdr1);

    counter = (((r->m_zhdr0 * 256 + r->m_zhdr1) % 31 != 0) || (r->m_zhdr1 & 32) || ((r->m_zhdr0 & 15) != 8));

    if (!(decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)) counter |= (((1U << (8U + (r->m_zhdr0 >> 4))) > 32768U) || ((out_buf_size_mask + 1) < (size_t)(1U << (8U + (r->m_zhdr0 >> 4)))));

    if (counter) { TINFL_CR_RETURN_FOREVER(36, TINFL_STATUS_FAILED); }

  }

  do

  {

    TINFL_GET_BITS(3, r->m_final, 3); r->m_type = r->m_final >> 1;

    if (r->m_type == 0)

    {

      TINFL_SKIP_BITS(5, num_bits & 7);

      for (counter = 0; counter < 4; ++counter) { if (num_bits) TINFL_GET_BITS(6, r->m_raw_header[counter], 8); else TINFL_GET_BYTE(7, r->m_raw_header[counter]); }

      if ((counter = (r->m_raw_header[0] | (r->m_raw_header[1] << 8))) != (mz_uint)(0xFFFF ^ (r->m_raw_header[2] | (r->m_raw_header[3] << 8)))) { TINFL_CR_RETURN_FOREVER(39, TINFL_STATUS_FAILED); }

      while ((counter) && (num_bits))

      {

        TINFL_GET_BITS(51, dist, 8);

        while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(52, TINFL_STATUS_HAS_MORE_OUTPUT); }

        *pOut_buf_cur++ = (mz_uint8)dist;

        counter--;

      }

      while (counter)

      {

        size_t n; while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(9, TINFL_STATUS_HAS_MORE_OUTPUT); }

        while (pIn_buf_cur >= pIn_buf_end)

        {

          if (decomp_flags & TINFL_FLAG_HAS_MORE_INPUT)

          {

            TINFL_CR_RETURN(38, TINFL_STATUS_NEEDS_MORE_INPUT);

          }

          else

          {

            TINFL_CR_RETURN_FOREVER(40, TINFL_STATUS_FAILED);

          }

        }

        n = MZ_MIN(MZ_MIN((size_t)(pOut_buf_end - pOut_buf_cur), (size_t)(pIn_buf_end - pIn_buf_cur)), counter);

        TINFL_MEMCPY(pOut_buf_cur, pIn_buf_cur, n); pIn_buf_cur += n; pOut_buf_cur += n; counter -= (mz_uint)n;

      }

    }

    else if (r->m_type == 3)

    {

      TINFL_CR_RETURN_FOREVER(10, TINFL_STATUS_FAILED);

    }

    else

    {

      if (r->m_type == 1)

      {

        mz_uint8 *p = r->m_tables[0].m_code_size; mz_uint i;

        r->m_table_sizes[0] = 288; r->m_table_sizes[1] = 32; TINFL_MEMSET(r->m_tables[1].m_code_size, 5, 32);

        for ( i = 0; i <= 143; ++i) *p++ = 8; for ( ; i <= 255; ++i) *p++ = 9; for ( ; i <= 279; ++i) *p++ = 7; for ( ; i <= 287; ++i) *p++ = 8;

      }

      else

      {

        for (counter = 0; counter < 3; counter++) { TINFL_GET_BITS(11, r->m_table_sizes[counter], "\05\05\04"[counter]); r->m_table_sizes[counter] += s_min_table_sizes[counter]; }

        MZ_CLEAR_OBJ(r->m_tables[2].m_code_size); for (counter = 0; counter < r->m_table_sizes[2]; counter++) { mz_uint s; TINFL_GET_BITS(14, s, 3); r->m_tables[2].m_code_size[s_length_dezigzag[counter]] = (mz_uint8)s; }

        r->m_table_sizes[2] = 19;

      }

      for ( ; (int)r->m_type >= 0; r->m_type--)

      {

        int tree_next, tree_cur; tinfl_huff_table *pTable;

        mz_uint i, j, used_syms, total, sym_index, next_code[17], total_syms[16]; pTable = &r->m_tables[r->m_type]; MZ_CLEAR_OBJ(total_syms); MZ_CLEAR_OBJ(pTable->m_look_up); MZ_CLEAR_OBJ(pTable->m_tree);

        for (i = 0; i < r->m_table_sizes[r->m_type]; ++i) total_syms[pTable->m_code_size[i]]++;

        used_syms = 0, total = 0; next_code[0] = next_code[1] = 0;

        for (i = 1; i <= 15; ++i) { used_syms += total_syms[i]; next_code[i + 1] = (total = ((total + total_syms[i]) << 1)); }

        if ((65536 != total) && (used_syms > 1))

        {

          TINFL_CR_RETURN_FOREVER(35, TINFL_STATUS_FAILED);

        }

        for (tree_next = -1, sym_index = 0; sym_index < r->m_table_sizes[r->m_type]; ++sym_index)

        {

          mz_uint rev_code = 0, l, cur_code, code_size = pTable->m_code_size[sym_index]; if (!code_size) continue;

          cur_code = next_code[code_size]++; for (l = code_size; l > 0; l--, cur_code >>= 1) rev_code = (rev_code << 1) | (cur_code & 1);

          if (code_size <= TINFL_FAST_LOOKUP_BITS) { mz_int16 k = (mz_int16)((code_size << 9) | sym_index); while (rev_code < TINFL_FAST_LOOKUP_SIZE) { pTable->m_look_up[rev_code] = k; rev_code += (1 << code_size); } continue; }

          if (0 == (tree_cur = pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)])) { pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)] = (mz_int16)tree_next; tree_cur = tree_next; tree_next -= 2; }

          rev_code >>= (TINFL_FAST_LOOKUP_BITS - 1);

          for (j = code_size; j > (TINFL_FAST_LOOKUP_BITS + 1); j--)

          {

            tree_cur -= ((rev_code >>= 1) & 1);

            if (!pTable->m_tree[-tree_cur - 1]) { pTable->m_tree[-tree_cur - 1] = (mz_int16)tree_next; tree_cur = tree_next; tree_next -= 2; } else tree_cur = pTable->m_tree[-tree_cur - 1];

          }

          tree_cur -= ((rev_code >>= 1) & 1); pTable->m_tree[-tree_cur - 1] = (mz_int16)sym_index;

        }

        if (r->m_type == 2)

        {

          for (counter = 0; counter < (r->m_table_sizes[0] + r->m_table_sizes[1]); )

          {

            mz_uint s; TINFL_HUFF_DECODE(16, dist, &r->m_tables[2]); if (dist < 16) { r->m_len_codes[counter++] = (mz_uint8)dist; continue; }

            if ((dist == 16) && (!counter))

            {

              TINFL_CR_RETURN_FOREVER(17, TINFL_STATUS_FAILED);

            }

            num_extra = "\02\03\07"[dist - 16]; TINFL_GET_BITS(18, s, num_extra); s += "\03\03\013"[dist - 16];

            TINFL_MEMSET(r->m_len_codes + counter, (dist == 16) ? r->m_len_codes[counter - 1] : 0, s); counter += s;

          }

          if ((r->m_table_sizes[0] + r->m_table_sizes[1]) != counter)

          {

            TINFL_CR_RETURN_FOREVER(21, TINFL_STATUS_FAILED);

          }

          TINFL_MEMCPY(r->m_tables[0].m_code_size, r->m_len_codes, r->m_table_sizes[0]); TINFL_MEMCPY(r->m_tables[1].m_code_size, r->m_len_codes + r->m_table_sizes[0], r->m_table_sizes[1]);

        }

      }

      for ( ; ; )

      {

        mz_uint8 *pSrc;

        for ( ; ; )

        {

          if (((pIn_buf_end - pIn_buf_cur) < 4) || ((pOut_buf_end - pOut_buf_cur) < 2))

          {

            TINFL_HUFF_DECODE(23, counter, &r->m_tables[0]);

            if (counter >= 256)

              break;

            while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(24, TINFL_STATUS_HAS_MORE_OUTPUT); }

            *pOut_buf_cur++ = (mz_uint8)counter;

          }

          else

          {

            int sym2; mz_uint code_len;

#if TINFL_USE_64BIT_BITBUF

            if (num_bits < 30) { bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE32(pIn_buf_cur)) << num_bits); pIn_buf_cur += 4; num_bits += 32; }

#else

            if (num_bits < 15) { bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE16(pIn_buf_cur)) << num_bits); pIn_buf_cur += 2; num_bits += 16; }

#endif

            if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)

              code_len = sym2 >> 9;

            else

            {

              code_len = TINFL_FAST_LOOKUP_BITS; do { sym2 = r->m_tables[0].m_tree[~sym2 + ((bit_buf >> code_len++) & 1)]; } while (sym2 < 0);

            }

            counter = sym2; bit_buf >>= code_len; num_bits -= code_len;

            if (counter & 256)

              break;

#if !TINFL_USE_64BIT_BITBUF

            if (num_bits < 15) { bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE16(pIn_buf_cur)) << num_bits); pIn_buf_cur += 2; num_bits += 16; }

#endif

            if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)

              code_len = sym2 >> 9;

            else

            {

              code_len = TINFL_FAST_LOOKUP_BITS; do { sym2 = r->m_tables[0].m_tree[~sym2 + ((bit_buf >> code_len++) & 1)]; } while (sym2 < 0);

            }

            bit_buf >>= code_len; num_bits -= code_len;

            pOut_buf_cur[0] = (mz_uint8)counter;

            if (sym2 & 256)

            {

              pOut_buf_cur++;

              counter = sym2;

              break;

            }

            pOut_buf_cur[1] = (mz_uint8)sym2;

            pOut_buf_cur += 2;

          }

        }

        if ((counter &= 511) == 256) break;

        num_extra = s_length_extra[counter - 257]; counter = s_length_base[counter - 257];

        if (num_extra) { mz_uint extra_bits; TINFL_GET_BITS(25, extra_bits, num_extra); counter += extra_bits; }

        TINFL_HUFF_DECODE(26, dist, &r->m_tables[1]);

        num_extra = s_dist_extra[dist]; dist = s_dist_base[dist];

        if (num_extra) { mz_uint extra_bits; TINFL_GET_BITS(27, extra_bits, num_extra); dist += extra_bits; }

        dist_from_out_buf_start = pOut_buf_cur - pOut_buf_start;

        if ((dist > dist_from_out_buf_start) && (decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF))

        {

          TINFL_CR_RETURN_FOREVER(37, TINFL_STATUS_FAILED);

        }

        pSrc = pOut_buf_start + ((dist_from_out_buf_start - dist) & out_buf_size_mask);

        if ((MZ_MAX(pOut_buf_cur, pSrc) + counter) > pOut_buf_end)

        {

          while (counter--)

          {

            while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(53, TINFL_STATUS_HAS_MORE_OUTPUT); }

            *pOut_buf_cur++ = pOut_buf_start[(dist_from_out_buf_start++ - dist) & out_buf_size_mask];

          }

          continue;

        }

#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES

        else if ((counter >= 9) && (counter <= dist))

        {

          const mz_uint8 *pSrc_end = pSrc + (counter & ~7);

          do

          {

            ((mz_uint32 *)pOut_buf_cur)[0] = ((const mz_uint32 *)pSrc)[0];

            ((mz_uint32 *)pOut_buf_cur)[1] = ((const mz_uint32 *)pSrc)[1];

            pOut_buf_cur += 8;

          } while ((pSrc += 8) < pSrc_end);

          if ((counter &= 7) < 3)

          {

            if (counter)

            {

              pOut_buf_cur[0] = pSrc[0];

              if (counter > 1)

                pOut_buf_cur[1] = pSrc[1];

              pOut_buf_cur += counter;

            }

            continue;

          }

        }

#endif

        do

        {

          pOut_buf_cur[0] = pSrc[0];

          pOut_buf_cur[1] = pSrc[1];

          pOut_buf_cur[2] = pSrc[2];

          pOut_buf_cur += 3; pSrc += 3;

        } while ((int)(counter -= 3) > 2);

        if ((int)counter > 0)

        {

          pOut_buf_cur[0] = pSrc[0];

          if ((int)counter > 1)

            pOut_buf_cur[1] = pSrc[1];

          pOut_buf_cur += counter;

        }

      }

    }

  } while (!(r->m_final & 1));

  if (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER)

  {

    TINFL_SKIP_BITS(32, num_bits & 7); for (counter = 0; counter < 4; ++counter) { mz_uint s; if (num_bits) TINFL_GET_BITS(41, s, 8); else TINFL_GET_BYTE(42, s); r->m_z_adler32 = (r->m_z_adler32 << 8) | s; }

  }

  TINFL_CR_RETURN_FOREVER(34, TINFL_STATUS_DONE);

  TINFL_CR_FINISH

common_exit:

  r->m_num_bits = num_bits; r->m_bit_buf = bit_buf; r->m_dist = dist; r->m_counter = counter; r->m_num_extra = num_extra; r->m_dist_from_out_buf_start = dist_from_out_buf_start;

  *pIn_buf_size = pIn_buf_cur - pIn_buf_next; *pOut_buf_size = pOut_buf_cur - pOut_buf_next;

  if ((decomp_flags & (TINFL_FLAG_PARSE_ZLIB_HEADER | TINFL_FLAG_COMPUTE_ADLER32)) && (status >= 0))

  {

    const mz_uint8 *ptr = pOut_buf_next; size_t buf_len = *pOut_buf_size;

    mz_uint32 i, s1 = r->m_check_adler32 & 0xffff, s2 = r->m_check_adler32 >> 16; size_t block_len = buf_len % 5552;

    while (buf_len)

    {

      for (i = 0; i + 7 < block_len; i += 8, ptr += 8)

      {

        s1 += ptr[0], s2 += s1; s1 += ptr[1], s2 += s1; s1 += ptr[2], s2 += s1; s1 += ptr[3], s2 += s1;

        s1 += ptr[4], s2 += s1; s1 += ptr[5], s2 += s1; s1 += ptr[6], s2 += s1; s1 += ptr[7], s2 += s1;

      }

      for ( ; i < block_len; ++i) s1 += *ptr++, s2 += s1;

      s1 %= 65521U, s2 %= 65521U; buf_len -= block_len; block_len = 5552;

    }

    r->m_check_adler32 = (s2 << 16) + s1; if ((status == TINFL_STATUS_DONE) && (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER) && (r->m_check_adler32 != r->m_z_adler32)) status = TINFL_STATUS_ADLER32_MISMATCH;

  }

  return status;

}

/* Flush values. For typical usage you only need MZ_NO_FLUSH and MZ_FINISH. The other stuff is for advanced use. */

enum { MZ_NO_FLUSH = 0, MZ_PARTIAL_FLUSH = 1, MZ_SYNC_FLUSH = 2, MZ_FULL_FLUSH = 3, MZ_FINISH = 4, MZ_BLOCK = 5 };

/* Return status codes. MZ_PARAM_ERROR is non-standard. */

enum { MZ_OK = 0, MZ_STREAM_END = 1, MZ_NEED_DICT = 2, MZ_ERRNO = -1, MZ_STREAM_ERROR = -2, MZ_DATA_ERROR = -3, MZ_MEM_ERROR = -4, MZ_BUF_ERROR = -5, MZ_VERSION_ERROR = -6, MZ_PARAM_ERROR = -10000 };

/* Compression levels. */

enum { MZ_NO_COMPRESSION = 0, MZ_BEST_SPEED = 1, MZ_BEST_COMPRESSION = 9, MZ_DEFAULT_COMPRESSION = -1 };

/* Window bits */

#define MZ_DEFAULT_WINDOW_BITS 15

struct mz_internal_state;

/* Compression/decompression stream struct. */

typedef struct mz_stream_s

{

  const unsigned char *next_in;     /* pointer to next byte to read */

  unsigned int avail_in;            /* number of bytes available at next_in */

  mz_ulong total_in;                /* total number of bytes consumed so far */

  unsigned char *next_out;          /* pointer to next byte to write */

  unsigned int avail_out;           /* number of bytes that can be written to next_out */

  mz_ulong total_out;               /* total number of bytes produced so far */

  char *msg;                        /* error msg (unused) */

  struct mz_internal_state *state;  /* internal state, allocated by zalloc/zfree */

  mz_alloc_func zalloc;             /* optional heap allocation function (defaults to malloc) */

  mz_free_func zfree;               /* optional heap free function (defaults to free) */

  void *opaque;                     /* heap alloc function user pointer */

  int data_type;                    /* data_type (unused) */

  mz_ulong adler;                   /* adler32 of the source or uncompressed data */

  mz_ulong reserved;                /* not used */

} mz_stream;

typedef mz_stream *mz_streamp;

typedef struct

{

  tinfl_decompressor m_decomp;

  mz_uint m_dict_ofs, m_dict_avail, m_first_call, m_has_flushed; int m_window_bits;

  mz_uint8 m_dict[TINFL_LZ_DICT_SIZE];

  tinfl_status m_last_status;

} inflate_state;

static int mz_inflateInit2(mz_streamp pStream, int window_bits)

{

  inflate_state *pDecomp;

  if (!pStream) return MZ_STREAM_ERROR;

  if ((window_bits != MZ_DEFAULT_WINDOW_BITS) && (-window_bits != MZ_DEFAULT_WINDOW_BITS)) return MZ_PARAM_ERROR;

  pStream->data_type = 0;

  pStream->adler = 0;

  pStream->msg = NULL;

  pStream->total_in = 0;

  pStream->total_out = 0;

  pStream->reserved = 0;