Link zlib statically for windows (#35)
* Add zlib 1.2.11 sources * link zlib statically for windows
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							| @@ -0,0 +1 @@ | ||||
| See infback9.h for what this is and how to use it. | ||||
							
								
								
									
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								third_party/zlib/contrib/infback9/infback9.c
									
									
									
									
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								third_party/zlib/contrib/infback9/infback9.c
									
									
									
									
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							| @@ -0,0 +1,615 @@ | ||||
| /* infback9.c -- inflate deflate64 data using a call-back interface | ||||
|  * Copyright (C) 1995-2008 Mark Adler | ||||
|  * For conditions of distribution and use, see copyright notice in zlib.h | ||||
|  */ | ||||
|  | ||||
| #include "zutil.h" | ||||
| #include "infback9.h" | ||||
| #include "inftree9.h" | ||||
| #include "inflate9.h" | ||||
|  | ||||
| #define WSIZE 65536UL | ||||
|  | ||||
| /* | ||||
|    strm provides memory allocation functions in zalloc and zfree, or | ||||
|    Z_NULL to use the library memory allocation functions. | ||||
|  | ||||
|    window is a user-supplied window and output buffer that is 64K bytes. | ||||
|  */ | ||||
| int ZEXPORT inflateBack9Init_(strm, window, version, stream_size) | ||||
| z_stream FAR *strm; | ||||
| unsigned char FAR *window; | ||||
| 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 || window == 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 = (voidpf)state; | ||||
|     state->window = window; | ||||
|     return Z_OK; | ||||
| } | ||||
|  | ||||
| /* | ||||
|    Build and output length and distance decoding tables for fixed code | ||||
|    decoding. | ||||
|  */ | ||||
| #ifdef MAKEFIXED | ||||
| #include <stdio.h> | ||||
|  | ||||
| void makefixed9(void) | ||||
| { | ||||
|     unsigned sym, bits, low, size; | ||||
|     code *next, *lenfix, *distfix; | ||||
|     struct inflate_state state; | ||||
|     code fixed[544]; | ||||
|  | ||||
|     /* 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_table9(LENS, state.lens, 288, &(next), &(bits), state.work); | ||||
|  | ||||
|     /* distance table */ | ||||
|     sym = 0; | ||||
|     while (sym < 32) state.lens[sym++] = 5; | ||||
|     distfix = next; | ||||
|     bits = 5; | ||||
|     inflate_table9(DISTS, state.lens, 32, &(next), &(bits), state.work); | ||||
|  | ||||
|     /* write tables */ | ||||
|     puts("    /* inffix9.h -- table for decoding deflate64 fixed codes"); | ||||
|     puts("     * Generated automatically by makefixed9()."); | ||||
|     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 % 6) == 0) printf("\n        "); | ||||
|         printf("{%u,%u,%d}", lenfix[low].op, lenfix[low].bits, | ||||
|                lenfix[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 % 5) == 0) printf("\n        "); | ||||
|         printf("{%u,%u,%d}", distfix[low].op, distfix[low].bits, | ||||
|                distfix[low].val); | ||||
|         if (++low == size) break; | ||||
|         putchar(','); | ||||
|     } | ||||
|     puts("\n    };"); | ||||
| } | ||||
| #endif /* MAKEFIXED */ | ||||
|  | ||||
| /* Macros for inflateBack(): */ | ||||
|  | ||||
| /* Clear the input bit accumulator */ | ||||
| #define INITBITS() \ | ||||
|     do { \ | ||||
|         hold = 0; \ | ||||
|         bits = 0; \ | ||||
|     } while (0) | ||||
|  | ||||
| /* Assure that some input is available.  If input is requested, but denied, | ||||
|    then return a Z_BUF_ERROR from inflateBack(). */ | ||||
| #define PULL() \ | ||||
|     do { \ | ||||
|         if (have == 0) { \ | ||||
|             have = in(in_desc, &next); \ | ||||
|             if (have == 0) { \ | ||||
|                 next = Z_NULL; \ | ||||
|                 ret = Z_BUF_ERROR; \ | ||||
|                 goto inf_leave; \ | ||||
|             } \ | ||||
|         } \ | ||||
|     } while (0) | ||||
|  | ||||
| /* Get a byte of input into the bit accumulator, or return from inflateBack() | ||||
|    with an error if there is no input available. */ | ||||
| #define PULLBYTE() \ | ||||
|     do { \ | ||||
|         PULL(); \ | ||||
|         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 inflateBack() with | ||||
|    an error. */ | ||||
| #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) | ||||
|  | ||||
| /* Assure that some output space is available, by writing out the window | ||||
|    if it's full.  If the write fails, return from inflateBack() with a | ||||
|    Z_BUF_ERROR. */ | ||||
| #define ROOM() \ | ||||
|     do { \ | ||||
|         if (left == 0) { \ | ||||
|             put = window; \ | ||||
|             left = WSIZE; \ | ||||
|             wrap = 1; \ | ||||
|             if (out(out_desc, put, (unsigned)left)) { \ | ||||
|                 ret = Z_BUF_ERROR; \ | ||||
|                 goto inf_leave; \ | ||||
|             } \ | ||||
|         } \ | ||||
|     } while (0) | ||||
|  | ||||
| /* | ||||
|    strm provides the memory allocation functions and window buffer on input, | ||||
|    and provides information on the unused input on return.  For Z_DATA_ERROR | ||||
|    returns, strm will also provide an error message. | ||||
|  | ||||
|    in() and out() are the call-back input and output functions.  When | ||||
|    inflateBack() needs more input, it calls in().  When inflateBack() has | ||||
|    filled the window with output, or when it completes with data in the | ||||
|    window, it calls out() to write out the data.  The application must not | ||||
|    change the provided input until in() is called again or inflateBack() | ||||
|    returns.  The application must not change the window/output buffer until | ||||
|    inflateBack() returns. | ||||
|  | ||||
|    in() and out() are called with a descriptor parameter provided in the | ||||
|    inflateBack() call.  This parameter can be a structure that provides the | ||||
|    information required to do the read or write, as well as accumulated | ||||
|    information on the input and output such as totals and check values. | ||||
|  | ||||
|    in() should return zero on failure.  out() should return non-zero on | ||||
|    failure.  If either in() or out() fails, than inflateBack() returns a | ||||
|    Z_BUF_ERROR.  strm->next_in can be checked for Z_NULL to see whether it | ||||
|    was in() or out() that caused in the error.  Otherwise,  inflateBack() | ||||
|    returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format | ||||
|    error, or Z_MEM_ERROR if it could not allocate memory for the state. | ||||
|    inflateBack() can also return Z_STREAM_ERROR if the input parameters | ||||
|    are not correct, i.e. strm is Z_NULL or the state was not initialized. | ||||
|  */ | ||||
| int ZEXPORT inflateBack9(strm, in, in_desc, out, out_desc) | ||||
| z_stream FAR *strm; | ||||
| in_func in; | ||||
| void FAR *in_desc; | ||||
| out_func out; | ||||
| void FAR *out_desc; | ||||
| { | ||||
|     struct inflate_state FAR *state; | ||||
|     z_const unsigned char FAR *next;    /* next input */ | ||||
|     unsigned char FAR *put;     /* next output */ | ||||
|     unsigned have;              /* available input */ | ||||
|     unsigned long left;         /* available output */ | ||||
|     inflate_mode mode;          /* current inflate mode */ | ||||
|     int lastblock;              /* true if processing last block */ | ||||
|     int wrap;                   /* true if the window has wrapped */ | ||||
|     unsigned char FAR *window;  /* allocated sliding window, if needed */ | ||||
|     unsigned long hold;         /* bit buffer */ | ||||
|     unsigned bits;              /* bits in bit buffer */ | ||||
|     unsigned extra;             /* extra bits needed */ | ||||
|     unsigned long length;       /* literal or length of data to copy */ | ||||
|     unsigned long offset;       /* distance back to copy string from */ | ||||
|     unsigned long copy;         /* number of stored or match bytes to copy */ | ||||
|     unsigned char FAR *from;    /* where to copy match bytes from */ | ||||
|     code const FAR *lencode;    /* starting table for length/literal codes */ | ||||
|     code const FAR *distcode;   /* starting table for distance codes */ | ||||
|     unsigned lenbits;           /* index bits for lencode */ | ||||
|     unsigned distbits;          /* index bits for distcode */ | ||||
|     code here;                  /* current decoding table entry */ | ||||
|     code last;                  /* parent table entry */ | ||||
|     unsigned len;               /* length to copy for repeats, bits to drop */ | ||||
|     int ret;                    /* return code */ | ||||
|     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}; | ||||
| #include "inffix9.h" | ||||
|  | ||||
|     /* Check that the strm exists and that the state was initialized */ | ||||
|     if (strm == Z_NULL || strm->state == Z_NULL) | ||||
|         return Z_STREAM_ERROR; | ||||
|     state = (struct inflate_state FAR *)strm->state; | ||||
|  | ||||
|     /* Reset the state */ | ||||
|     strm->msg = Z_NULL; | ||||
|     mode = TYPE; | ||||
|     lastblock = 0; | ||||
|     wrap = 0; | ||||
|     window = state->window; | ||||
|     next = strm->next_in; | ||||
|     have = next != Z_NULL ? strm->avail_in : 0; | ||||
|     hold = 0; | ||||
|     bits = 0; | ||||
|     put = window; | ||||
|     left = WSIZE; | ||||
|     lencode = Z_NULL; | ||||
|     distcode = Z_NULL; | ||||
|  | ||||
|     /* Inflate until end of block marked as last */ | ||||
|     for (;;) | ||||
|         switch (mode) { | ||||
|         case TYPE: | ||||
|             /* determine and dispatch block type */ | ||||
|             if (lastblock) { | ||||
|                 BYTEBITS(); | ||||
|                 mode = DONE; | ||||
|                 break; | ||||
|             } | ||||
|             NEEDBITS(3); | ||||
|             lastblock = BITS(1); | ||||
|             DROPBITS(1); | ||||
|             switch (BITS(2)) { | ||||
|             case 0:                             /* stored block */ | ||||
|                 Tracev((stderr, "inflate:     stored block%s\n", | ||||
|                         lastblock ? " (last)" : "")); | ||||
|                 mode = STORED; | ||||
|                 break; | ||||
|             case 1:                             /* fixed block */ | ||||
|                 lencode = lenfix; | ||||
|                 lenbits = 9; | ||||
|                 distcode = distfix; | ||||
|                 distbits = 5; | ||||
|                 Tracev((stderr, "inflate:     fixed codes block%s\n", | ||||
|                         lastblock ? " (last)" : "")); | ||||
|                 mode = LEN;                     /* decode codes */ | ||||
|                 break; | ||||
|             case 2:                             /* dynamic block */ | ||||
|                 Tracev((stderr, "inflate:     dynamic codes block%s\n", | ||||
|                         lastblock ? " (last)" : "")); | ||||
|                 mode = TABLE; | ||||
|                 break; | ||||
|             case 3: | ||||
|                 strm->msg = (char *)"invalid block type"; | ||||
|                 mode = BAD; | ||||
|             } | ||||
|             DROPBITS(2); | ||||
|             break; | ||||
|  | ||||
|         case STORED: | ||||
|             /* get and verify stored block length */ | ||||
|             BYTEBITS();                         /* go to byte boundary */ | ||||
|             NEEDBITS(32); | ||||
|             if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) { | ||||
|                 strm->msg = (char *)"invalid stored block lengths"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|             length = (unsigned)hold & 0xffff; | ||||
|             Tracev((stderr, "inflate:       stored length %lu\n", | ||||
|                     length)); | ||||
|             INITBITS(); | ||||
|  | ||||
|             /* copy stored block from input to output */ | ||||
|             while (length != 0) { | ||||
|                 copy = length; | ||||
|                 PULL(); | ||||
|                 ROOM(); | ||||
|                 if (copy > have) copy = have; | ||||
|                 if (copy > left) copy = left; | ||||
|                 zmemcpy(put, next, copy); | ||||
|                 have -= copy; | ||||
|                 next += copy; | ||||
|                 left -= copy; | ||||
|                 put += copy; | ||||
|                 length -= copy; | ||||
|             } | ||||
|             Tracev((stderr, "inflate:       stored end\n")); | ||||
|             mode = TYPE; | ||||
|             break; | ||||
|  | ||||
|         case TABLE: | ||||
|             /* get dynamic table entries descriptor */ | ||||
|             NEEDBITS(14); | ||||
|             state->nlen = BITS(5) + 257; | ||||
|             DROPBITS(5); | ||||
|             state->ndist = BITS(5) + 1; | ||||
|             DROPBITS(5); | ||||
|             state->ncode = BITS(4) + 4; | ||||
|             DROPBITS(4); | ||||
|             if (state->nlen > 286) { | ||||
|                 strm->msg = (char *)"too many length symbols"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|             Tracev((stderr, "inflate:       table sizes ok\n")); | ||||
|  | ||||
|             /* get code length code lengths (not a typo) */ | ||||
|             state->have = 0; | ||||
|             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; | ||||
|             lencode = (code const FAR *)(state->next); | ||||
|             lenbits = 7; | ||||
|             ret = inflate_table9(CODES, state->lens, 19, &(state->next), | ||||
|                                 &(lenbits), state->work); | ||||
|             if (ret) { | ||||
|                 strm->msg = (char *)"invalid code lengths set"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|             Tracev((stderr, "inflate:       code lengths ok\n")); | ||||
|  | ||||
|             /* get length and distance code code lengths */ | ||||
|             state->have = 0; | ||||
|             while (state->have < state->nlen + state->ndist) { | ||||
|                 for (;;) { | ||||
|                     here = lencode[BITS(lenbits)]; | ||||
|                     if ((unsigned)(here.bits) <= bits) break; | ||||
|                     PULLBYTE(); | ||||
|                 } | ||||
|                 if (here.val < 16) { | ||||
|                     NEEDBITS(here.bits); | ||||
|                     DROPBITS(here.bits); | ||||
|                     state->lens[state->have++] = here.val; | ||||
|                 } | ||||
|                 else { | ||||
|                     if (here.val == 16) { | ||||
|                         NEEDBITS(here.bits + 2); | ||||
|                         DROPBITS(here.bits); | ||||
|                         if (state->have == 0) { | ||||
|                             strm->msg = (char *)"invalid bit length repeat"; | ||||
|                             mode = BAD; | ||||
|                             break; | ||||
|                         } | ||||
|                         len = (unsigned)(state->lens[state->have - 1]); | ||||
|                         copy = 3 + BITS(2); | ||||
|                         DROPBITS(2); | ||||
|                     } | ||||
|                     else if (here.val == 17) { | ||||
|                         NEEDBITS(here.bits + 3); | ||||
|                         DROPBITS(here.bits); | ||||
|                         len = 0; | ||||
|                         copy = 3 + BITS(3); | ||||
|                         DROPBITS(3); | ||||
|                     } | ||||
|                     else { | ||||
|                         NEEDBITS(here.bits + 7); | ||||
|                         DROPBITS(here.bits); | ||||
|                         len = 0; | ||||
|                         copy = 11 + BITS(7); | ||||
|                         DROPBITS(7); | ||||
|                     } | ||||
|                     if (state->have + copy > state->nlen + state->ndist) { | ||||
|                         strm->msg = (char *)"invalid bit length repeat"; | ||||
|                         mode = BAD; | ||||
|                         break; | ||||
|                     } | ||||
|                     while (copy--) | ||||
|                         state->lens[state->have++] = (unsigned short)len; | ||||
|                 } | ||||
|             } | ||||
|  | ||||
|             /* handle error breaks in while */ | ||||
|             if (mode == BAD) break; | ||||
|  | ||||
|             /* check for end-of-block code (better have one) */ | ||||
|             if (state->lens[256] == 0) { | ||||
|                 strm->msg = (char *)"invalid code -- missing end-of-block"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|  | ||||
|             /* build code tables -- note: do not change the lenbits or distbits | ||||
|                values here (9 and 6) without reading the comments in inftree9.h | ||||
|                concerning the ENOUGH constants, which depend on those values */ | ||||
|             state->next = state->codes; | ||||
|             lencode = (code const FAR *)(state->next); | ||||
|             lenbits = 9; | ||||
|             ret = inflate_table9(LENS, state->lens, state->nlen, | ||||
|                             &(state->next), &(lenbits), state->work); | ||||
|             if (ret) { | ||||
|                 strm->msg = (char *)"invalid literal/lengths set"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|             distcode = (code const FAR *)(state->next); | ||||
|             distbits = 6; | ||||
|             ret = inflate_table9(DISTS, state->lens + state->nlen, | ||||
|                             state->ndist, &(state->next), &(distbits), | ||||
|                             state->work); | ||||
|             if (ret) { | ||||
|                 strm->msg = (char *)"invalid distances set"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|             Tracev((stderr, "inflate:       codes ok\n")); | ||||
|             mode = LEN; | ||||
|  | ||||
|         case LEN: | ||||
|             /* get a literal, length, or end-of-block code */ | ||||
|             for (;;) { | ||||
|                 here = lencode[BITS(lenbits)]; | ||||
|                 if ((unsigned)(here.bits) <= bits) break; | ||||
|                 PULLBYTE(); | ||||
|             } | ||||
|             if (here.op && (here.op & 0xf0) == 0) { | ||||
|                 last = here; | ||||
|                 for (;;) { | ||||
|                     here = lencode[last.val + | ||||
|                             (BITS(last.bits + last.op) >> last.bits)]; | ||||
|                     if ((unsigned)(last.bits + here.bits) <= bits) break; | ||||
|                     PULLBYTE(); | ||||
|                 } | ||||
|                 DROPBITS(last.bits); | ||||
|             } | ||||
|             DROPBITS(here.bits); | ||||
|             length = (unsigned)here.val; | ||||
|  | ||||
|             /* process literal */ | ||||
|             if (here.op == 0) { | ||||
|                 Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ? | ||||
|                         "inflate:         literal '%c'\n" : | ||||
|                         "inflate:         literal 0x%02x\n", here.val)); | ||||
|                 ROOM(); | ||||
|                 *put++ = (unsigned char)(length); | ||||
|                 left--; | ||||
|                 mode = LEN; | ||||
|                 break; | ||||
|             } | ||||
|  | ||||
|             /* process end of block */ | ||||
|             if (here.op & 32) { | ||||
|                 Tracevv((stderr, "inflate:         end of block\n")); | ||||
|                 mode = TYPE; | ||||
|                 break; | ||||
|             } | ||||
|  | ||||
|             /* invalid code */ | ||||
|             if (here.op & 64) { | ||||
|                 strm->msg = (char *)"invalid literal/length code"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|  | ||||
|             /* length code -- get extra bits, if any */ | ||||
|             extra = (unsigned)(here.op) & 31; | ||||
|             if (extra != 0) { | ||||
|                 NEEDBITS(extra); | ||||
|                 length += BITS(extra); | ||||
|                 DROPBITS(extra); | ||||
|             } | ||||
|             Tracevv((stderr, "inflate:         length %lu\n", length)); | ||||
|  | ||||
|             /* get distance code */ | ||||
|             for (;;) { | ||||
|                 here = distcode[BITS(distbits)]; | ||||
|                 if ((unsigned)(here.bits) <= bits) break; | ||||
|                 PULLBYTE(); | ||||
|             } | ||||
|             if ((here.op & 0xf0) == 0) { | ||||
|                 last = here; | ||||
|                 for (;;) { | ||||
|                     here = distcode[last.val + | ||||
|                             (BITS(last.bits + last.op) >> last.bits)]; | ||||
|                     if ((unsigned)(last.bits + here.bits) <= bits) break; | ||||
|                     PULLBYTE(); | ||||
|                 } | ||||
|                 DROPBITS(last.bits); | ||||
|             } | ||||
|             DROPBITS(here.bits); | ||||
|             if (here.op & 64) { | ||||
|                 strm->msg = (char *)"invalid distance code"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|             offset = (unsigned)here.val; | ||||
|  | ||||
|             /* get distance extra bits, if any */ | ||||
|             extra = (unsigned)(here.op) & 15; | ||||
|             if (extra != 0) { | ||||
|                 NEEDBITS(extra); | ||||
|                 offset += BITS(extra); | ||||
|                 DROPBITS(extra); | ||||
|             } | ||||
|             if (offset > WSIZE - (wrap ? 0: left)) { | ||||
|                 strm->msg = (char *)"invalid distance too far back"; | ||||
|                 mode = BAD; | ||||
|                 break; | ||||
|             } | ||||
|             Tracevv((stderr, "inflate:         distance %lu\n", offset)); | ||||
|  | ||||
|             /* copy match from window to output */ | ||||
|             do { | ||||
|                 ROOM(); | ||||
|                 copy = WSIZE - offset; | ||||
|                 if (copy < left) { | ||||
|                     from = put + copy; | ||||
|                     copy = left - copy; | ||||
|                 } | ||||
|                 else { | ||||
|                     from = put - offset; | ||||
|                     copy = left; | ||||
|                 } | ||||
|                 if (copy > length) copy = length; | ||||
|                 length -= copy; | ||||
|                 left -= copy; | ||||
|                 do { | ||||
|                     *put++ = *from++; | ||||
|                 } while (--copy); | ||||
|             } while (length != 0); | ||||
|             break; | ||||
|  | ||||
|         case DONE: | ||||
|             /* inflate stream terminated properly -- write leftover output */ | ||||
|             ret = Z_STREAM_END; | ||||
|             if (left < WSIZE) { | ||||
|                 if (out(out_desc, window, (unsigned)(WSIZE - left))) | ||||
|                     ret = Z_BUF_ERROR; | ||||
|             } | ||||
|             goto inf_leave; | ||||
|  | ||||
|         case BAD: | ||||
|             ret = Z_DATA_ERROR; | ||||
|             goto inf_leave; | ||||
|  | ||||
|         default:                /* can't happen, but makes compilers happy */ | ||||
|             ret = Z_STREAM_ERROR; | ||||
|             goto inf_leave; | ||||
|         } | ||||
|  | ||||
|     /* Return unused input */ | ||||
|   inf_leave: | ||||
|     strm->next_in = next; | ||||
|     strm->avail_in = have; | ||||
|     return ret; | ||||
| } | ||||
|  | ||||
| int ZEXPORT inflateBack9End(strm) | ||||
| z_stream FAR *strm; | ||||
| { | ||||
|     if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0) | ||||
|         return Z_STREAM_ERROR; | ||||
|     ZFREE(strm, strm->state); | ||||
|     strm->state = Z_NULL; | ||||
|     Tracev((stderr, "inflate: end\n")); | ||||
|     return Z_OK; | ||||
| } | ||||
							
								
								
									
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								third_party/zlib/contrib/infback9/infback9.h
									
									
									
									
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								third_party/zlib/contrib/infback9/infback9.h
									
									
									
									
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							| @@ -0,0 +1,37 @@ | ||||
| /* infback9.h -- header for using inflateBack9 functions | ||||
|  * Copyright (C) 2003 Mark Adler | ||||
|  * For conditions of distribution and use, see copyright notice in zlib.h | ||||
|  */ | ||||
|  | ||||
| /* | ||||
|  * This header file and associated patches provide a decoder for PKWare's | ||||
|  * undocumented deflate64 compression method (method 9).  Use with infback9.c, | ||||
|  * inftree9.h, inftree9.c, and inffix9.h.  These patches are not supported. | ||||
|  * This should be compiled with zlib, since it uses zutil.h and zutil.o. | ||||
|  * This code has not yet been tested on 16-bit architectures.  See the | ||||
|  * comments in zlib.h for inflateBack() usage.  These functions are used | ||||
|  * identically, except that there is no windowBits parameter, and a 64K | ||||
|  * window must be provided.  Also if int's are 16 bits, then a zero for | ||||
|  * the third parameter of the "out" function actually means 65536UL. | ||||
|  * zlib.h must be included before this header file. | ||||
|  */ | ||||
|  | ||||
| #ifdef __cplusplus | ||||
| extern "C" { | ||||
| #endif | ||||
|  | ||||
| ZEXTERN int ZEXPORT inflateBack9 OF((z_stream FAR *strm, | ||||
|                                     in_func in, void FAR *in_desc, | ||||
|                                     out_func out, void FAR *out_desc)); | ||||
| ZEXTERN int ZEXPORT inflateBack9End OF((z_stream FAR *strm)); | ||||
| ZEXTERN int ZEXPORT inflateBack9Init_ OF((z_stream FAR *strm, | ||||
|                                          unsigned char FAR *window, | ||||
|                                          const char *version, | ||||
|                                          int stream_size)); | ||||
| #define inflateBack9Init(strm, window) \ | ||||
|         inflateBack9Init_((strm), (window), \ | ||||
|         ZLIB_VERSION, sizeof(z_stream)) | ||||
|  | ||||
| #ifdef __cplusplus | ||||
| } | ||||
| #endif | ||||
							
								
								
									
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								third_party/zlib/contrib/infback9/inffix9.h
									
									
									
									
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							| @@ -0,0 +1,107 @@ | ||||
|     /* inffix9.h -- table for decoding deflate64 fixed codes | ||||
|      * Generated automatically by makefixed9(). | ||||
|      */ | ||||
|  | ||||
|     /* WARNING: this file should *not* be used by applications. | ||||
|        It is part of the implementation of this library and is | ||||
|        subject to change. Applications should only use zlib.h. | ||||
|      */ | ||||
|  | ||||
|     static const code lenfix[512] = { | ||||
|         {96,7,0},{0,8,80},{0,8,16},{132,8,115},{130,7,31},{0,8,112}, | ||||
|         {0,8,48},{0,9,192},{128,7,10},{0,8,96},{0,8,32},{0,9,160}, | ||||
|         {0,8,0},{0,8,128},{0,8,64},{0,9,224},{128,7,6},{0,8,88}, | ||||
|         {0,8,24},{0,9,144},{131,7,59},{0,8,120},{0,8,56},{0,9,208}, | ||||
|         {129,7,17},{0,8,104},{0,8,40},{0,9,176},{0,8,8},{0,8,136}, | ||||
|         {0,8,72},{0,9,240},{128,7,4},{0,8,84},{0,8,20},{133,8,227}, | ||||
|         {131,7,43},{0,8,116},{0,8,52},{0,9,200},{129,7,13},{0,8,100}, | ||||
|         {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232}, | ||||
|         {128,7,8},{0,8,92},{0,8,28},{0,9,152},{132,7,83},{0,8,124}, | ||||
|         {0,8,60},{0,9,216},{130,7,23},{0,8,108},{0,8,44},{0,9,184}, | ||||
|         {0,8,12},{0,8,140},{0,8,76},{0,9,248},{128,7,3},{0,8,82}, | ||||
|         {0,8,18},{133,8,163},{131,7,35},{0,8,114},{0,8,50},{0,9,196}, | ||||
|         {129,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},{0,8,130}, | ||||
|         {0,8,66},{0,9,228},{128,7,7},{0,8,90},{0,8,26},{0,9,148}, | ||||
|         {132,7,67},{0,8,122},{0,8,58},{0,9,212},{130,7,19},{0,8,106}, | ||||
|         {0,8,42},{0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244}, | ||||
|         {128,7,5},{0,8,86},{0,8,22},{65,8,0},{131,7,51},{0,8,118}, | ||||
|         {0,8,54},{0,9,204},{129,7,15},{0,8,102},{0,8,38},{0,9,172}, | ||||
|         {0,8,6},{0,8,134},{0,8,70},{0,9,236},{128,7,9},{0,8,94}, | ||||
|         {0,8,30},{0,9,156},{132,7,99},{0,8,126},{0,8,62},{0,9,220}, | ||||
|         {130,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142}, | ||||
|         {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{133,8,131}, | ||||
|         {130,7,31},{0,8,113},{0,8,49},{0,9,194},{128,7,10},{0,8,97}, | ||||
|         {0,8,33},{0,9,162},{0,8,1},{0,8,129},{0,8,65},{0,9,226}, | ||||
|         {128,7,6},{0,8,89},{0,8,25},{0,9,146},{131,7,59},{0,8,121}, | ||||
|         {0,8,57},{0,9,210},{129,7,17},{0,8,105},{0,8,41},{0,9,178}, | ||||
|         {0,8,9},{0,8,137},{0,8,73},{0,9,242},{128,7,4},{0,8,85}, | ||||
|         {0,8,21},{144,8,3},{131,7,43},{0,8,117},{0,8,53},{0,9,202}, | ||||
|         {129,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133}, | ||||
|         {0,8,69},{0,9,234},{128,7,8},{0,8,93},{0,8,29},{0,9,154}, | ||||
|         {132,7,83},{0,8,125},{0,8,61},{0,9,218},{130,7,23},{0,8,109}, | ||||
|         {0,8,45},{0,9,186},{0,8,13},{0,8,141},{0,8,77},{0,9,250}, | ||||
|         {128,7,3},{0,8,83},{0,8,19},{133,8,195},{131,7,35},{0,8,115}, | ||||
|         {0,8,51},{0,9,198},{129,7,11},{0,8,99},{0,8,35},{0,9,166}, | ||||
|         {0,8,3},{0,8,131},{0,8,67},{0,9,230},{128,7,7},{0,8,91}, | ||||
|         {0,8,27},{0,9,150},{132,7,67},{0,8,123},{0,8,59},{0,9,214}, | ||||
|         {130,7,19},{0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139}, | ||||
|         {0,8,75},{0,9,246},{128,7,5},{0,8,87},{0,8,23},{77,8,0}, | ||||
|         {131,7,51},{0,8,119},{0,8,55},{0,9,206},{129,7,15},{0,8,103}, | ||||
|         {0,8,39},{0,9,174},{0,8,7},{0,8,135},{0,8,71},{0,9,238}, | ||||
|         {128,7,9},{0,8,95},{0,8,31},{0,9,158},{132,7,99},{0,8,127}, | ||||
|         {0,8,63},{0,9,222},{130,7,27},{0,8,111},{0,8,47},{0,9,190}, | ||||
|         {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80}, | ||||
|         {0,8,16},{132,8,115},{130,7,31},{0,8,112},{0,8,48},{0,9,193}, | ||||
|         {128,7,10},{0,8,96},{0,8,32},{0,9,161},{0,8,0},{0,8,128}, | ||||
|         {0,8,64},{0,9,225},{128,7,6},{0,8,88},{0,8,24},{0,9,145}, | ||||
|         {131,7,59},{0,8,120},{0,8,56},{0,9,209},{129,7,17},{0,8,104}, | ||||
|         {0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},{0,9,241}, | ||||
|         {128,7,4},{0,8,84},{0,8,20},{133,8,227},{131,7,43},{0,8,116}, | ||||
|         {0,8,52},{0,9,201},{129,7,13},{0,8,100},{0,8,36},{0,9,169}, | ||||
|         {0,8,4},{0,8,132},{0,8,68},{0,9,233},{128,7,8},{0,8,92}, | ||||
|         {0,8,28},{0,9,153},{132,7,83},{0,8,124},{0,8,60},{0,9,217}, | ||||
|         {130,7,23},{0,8,108},{0,8,44},{0,9,185},{0,8,12},{0,8,140}, | ||||
|         {0,8,76},{0,9,249},{128,7,3},{0,8,82},{0,8,18},{133,8,163}, | ||||
|         {131,7,35},{0,8,114},{0,8,50},{0,9,197},{129,7,11},{0,8,98}, | ||||
|         {0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229}, | ||||
|         {128,7,7},{0,8,90},{0,8,26},{0,9,149},{132,7,67},{0,8,122}, | ||||
|         {0,8,58},{0,9,213},{130,7,19},{0,8,106},{0,8,42},{0,9,181}, | ||||
|         {0,8,10},{0,8,138},{0,8,74},{0,9,245},{128,7,5},{0,8,86}, | ||||
|         {0,8,22},{65,8,0},{131,7,51},{0,8,118},{0,8,54},{0,9,205}, | ||||
|         {129,7,15},{0,8,102},{0,8,38},{0,9,173},{0,8,6},{0,8,134}, | ||||
|         {0,8,70},{0,9,237},{128,7,9},{0,8,94},{0,8,30},{0,9,157}, | ||||
|         {132,7,99},{0,8,126},{0,8,62},{0,9,221},{130,7,27},{0,8,110}, | ||||
|         {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253}, | ||||
|         {96,7,0},{0,8,81},{0,8,17},{133,8,131},{130,7,31},{0,8,113}, | ||||
|         {0,8,49},{0,9,195},{128,7,10},{0,8,97},{0,8,33},{0,9,163}, | ||||
|         {0,8,1},{0,8,129},{0,8,65},{0,9,227},{128,7,6},{0,8,89}, | ||||
|         {0,8,25},{0,9,147},{131,7,59},{0,8,121},{0,8,57},{0,9,211}, | ||||
|         {129,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},{0,8,137}, | ||||
|         {0,8,73},{0,9,243},{128,7,4},{0,8,85},{0,8,21},{144,8,3}, | ||||
|         {131,7,43},{0,8,117},{0,8,53},{0,9,203},{129,7,13},{0,8,101}, | ||||
|         {0,8,37},{0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235}, | ||||
|         {128,7,8},{0,8,93},{0,8,29},{0,9,155},{132,7,83},{0,8,125}, | ||||
|         {0,8,61},{0,9,219},{130,7,23},{0,8,109},{0,8,45},{0,9,187}, | ||||
|         {0,8,13},{0,8,141},{0,8,77},{0,9,251},{128,7,3},{0,8,83}, | ||||
|         {0,8,19},{133,8,195},{131,7,35},{0,8,115},{0,8,51},{0,9,199}, | ||||
|         {129,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131}, | ||||
|         {0,8,67},{0,9,231},{128,7,7},{0,8,91},{0,8,27},{0,9,151}, | ||||
|         {132,7,67},{0,8,123},{0,8,59},{0,9,215},{130,7,19},{0,8,107}, | ||||
|         {0,8,43},{0,9,183},{0,8,11},{0,8,139},{0,8,75},{0,9,247}, | ||||
|         {128,7,5},{0,8,87},{0,8,23},{77,8,0},{131,7,51},{0,8,119}, | ||||
|         {0,8,55},{0,9,207},{129,7,15},{0,8,103},{0,8,39},{0,9,175}, | ||||
|         {0,8,7},{0,8,135},{0,8,71},{0,9,239},{128,7,9},{0,8,95}, | ||||
|         {0,8,31},{0,9,159},{132,7,99},{0,8,127},{0,8,63},{0,9,223}, | ||||
|         {130,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143}, | ||||
|         {0,8,79},{0,9,255} | ||||
|     }; | ||||
|  | ||||
|     static const code distfix[32] = { | ||||
|         {128,5,1},{135,5,257},{131,5,17},{139,5,4097},{129,5,5}, | ||||
|         {137,5,1025},{133,5,65},{141,5,16385},{128,5,3},{136,5,513}, | ||||
|         {132,5,33},{140,5,8193},{130,5,9},{138,5,2049},{134,5,129}, | ||||
|         {142,5,32769},{128,5,2},{135,5,385},{131,5,25},{139,5,6145}, | ||||
|         {129,5,7},{137,5,1537},{133,5,97},{141,5,24577},{128,5,4}, | ||||
|         {136,5,769},{132,5,49},{140,5,12289},{130,5,13},{138,5,3073}, | ||||
|         {134,5,193},{142,5,49153} | ||||
|     }; | ||||
							
								
								
									
										47
									
								
								third_party/zlib/contrib/infback9/inflate9.h
									
									
									
									
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										47
									
								
								third_party/zlib/contrib/infback9/inflate9.h
									
									
									
									
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							| @@ -0,0 +1,47 @@ | ||||
| /* inflate9.h -- internal inflate state definition | ||||
|  * Copyright (C) 1995-2003 Mark Adler | ||||
|  * For conditions of distribution and use, see copyright notice in zlib.h | ||||
|  */ | ||||
|  | ||||
| /* WARNING: this file should *not* be used by applications. It is | ||||
|    part of the implementation of the compression library and is | ||||
|    subject to change. Applications should only use zlib.h. | ||||
|  */ | ||||
|  | ||||
| /* Possible inflate modes between inflate() calls */ | ||||
| typedef enum { | ||||
|         TYPE,       /* i: waiting for type bits, including last-flag bit */ | ||||
|         STORED,     /* i: waiting for stored size (length and complement) */ | ||||
|         TABLE,      /* i: waiting for dynamic block table lengths */ | ||||
|             LEN,        /* i: waiting for length/lit code */ | ||||
|     DONE,       /* finished check, done -- remain here until reset */ | ||||
|     BAD         /* got a data error -- remain here until reset */ | ||||
| } inflate_mode; | ||||
|  | ||||
| /* | ||||
|     State transitions between above modes - | ||||
|  | ||||
|     (most modes can go to the BAD mode -- not shown for clarity) | ||||
|  | ||||
|     Read deflate blocks: | ||||
|             TYPE -> STORED or TABLE or LEN or DONE | ||||
|             STORED -> TYPE | ||||
|             TABLE -> LENLENS -> CODELENS -> LEN | ||||
|     Read deflate codes: | ||||
|                 LEN -> LEN or TYPE | ||||
|  */ | ||||
|  | ||||
| /* state maintained between inflate() calls.  Approximately 7K bytes. */ | ||||
| struct inflate_state { | ||||
|         /* sliding window */ | ||||
|     unsigned char FAR *window;  /* allocated sliding window, if needed */ | ||||
|         /* dynamic table building */ | ||||
|     unsigned ncode;             /* number of code length code lengths */ | ||||
|     unsigned nlen;              /* number of length code lengths */ | ||||
|     unsigned ndist;             /* number of distance code lengths */ | ||||
|     unsigned have;              /* number of code lengths in lens[] */ | ||||
|     code FAR *next;             /* next available space in codes[] */ | ||||
|     unsigned short lens[320];   /* temporary storage for code lengths */ | ||||
|     unsigned short work[288];   /* work area for code table building */ | ||||
|     code codes[ENOUGH];         /* space for code tables */ | ||||
| }; | ||||
							
								
								
									
										324
									
								
								third_party/zlib/contrib/infback9/inftree9.c
									
									
									
									
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										324
									
								
								third_party/zlib/contrib/infback9/inftree9.c
									
									
									
									
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							| @@ -0,0 +1,324 @@ | ||||
| /* inftree9.c -- generate Huffman trees for efficient decoding | ||||
|  * Copyright (C) 1995-2017 Mark Adler | ||||
|  * For conditions of distribution and use, see copyright notice in zlib.h | ||||
|  */ | ||||
|  | ||||
| #include "zutil.h" | ||||
| #include "inftree9.h" | ||||
|  | ||||
| #define MAXBITS 15 | ||||
|  | ||||
| const char inflate9_copyright[] = | ||||
|    " inflate9 1.2.11 Copyright 1995-2017 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 | ||||
|   include such an acknowledgment, I would appreciate that you keep this | ||||
|   copyright string in the executable of your product. | ||||
|  */ | ||||
|  | ||||
| /* | ||||
|    Build a set of tables to decode the provided canonical Huffman code. | ||||
|    The code lengths are lens[0..codes-1].  The result starts at *table, | ||||
|    whose indices are 0..2^bits-1.  work is a writable array of at least | ||||
|    lens shorts, which is used as a work area.  type is the type of code | ||||
|    to be generated, CODES, LENS, or DISTS.  On return, zero is success, | ||||
|    -1 is an invalid code, and +1 means that ENOUGH isn't enough.  table | ||||
|    on return points to the next available entry's address.  bits is the | ||||
|    requested root table index bits, and on return it is the actual root | ||||
|    table index bits.  It will differ if the request is greater than the | ||||
|    longest code or if it is less than the shortest code. | ||||
|  */ | ||||
| int inflate_table9(type, lens, codes, table, bits, work) | ||||
| codetype type; | ||||
| unsigned short FAR *lens; | ||||
| unsigned codes; | ||||
| code FAR * FAR *table; | ||||
| unsigned FAR *bits; | ||||
| unsigned short FAR *work; | ||||
| { | ||||
|     unsigned len;               /* a code's length in bits */ | ||||
|     unsigned sym;               /* index of code symbols */ | ||||
|     unsigned min, max;          /* minimum and maximum code lengths */ | ||||
|     unsigned root;              /* number of index bits for root table */ | ||||
|     unsigned curr;              /* number of index bits for current table */ | ||||
|     unsigned drop;              /* code bits to drop for sub-table */ | ||||
|     int left;                   /* number of prefix codes available */ | ||||
|     unsigned used;              /* code entries in table used */ | ||||
|     unsigned huff;              /* Huffman code */ | ||||
|     unsigned incr;              /* for incrementing code, index */ | ||||
|     unsigned fill;              /* index for replicating entries */ | ||||
|     unsigned low;               /* low bits for current root entry */ | ||||
|     unsigned mask;              /* mask for low root bits */ | ||||
|     code this;                  /* table entry for duplication */ | ||||
|     code FAR *next;             /* next available space in table */ | ||||
|     const unsigned short FAR *base;     /* base value table to use */ | ||||
|     const unsigned short FAR *extra;    /* extra bits table to use */ | ||||
|     int end;                    /* use base and extra for symbol > end */ | ||||
|     unsigned short count[MAXBITS+1];    /* number of codes of each length */ | ||||
|     unsigned short offs[MAXBITS+1];     /* offsets in table for each length */ | ||||
|     static const unsigned short lbase[31] = { /* Length codes 257..285 base */ | ||||
|         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, 3, 0, 0}; | ||||
|     static const unsigned short lext[31] = { /* Length codes 257..285 extra */ | ||||
|         128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129, | ||||
|         130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132, | ||||
|         133, 133, 133, 133, 144, 77, 202}; | ||||
|     static const unsigned short dbase[32] = { /* Distance codes 0..31 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, 8193, 12289, 16385, 24577, 32769, 49153}; | ||||
|     static const unsigned short dext[32] = { /* Distance codes 0..31 extra */ | ||||
|         128, 128, 128, 128, 129, 129, 130, 130, 131, 131, 132, 132, | ||||
|         133, 133, 134, 134, 135, 135, 136, 136, 137, 137, 138, 138, | ||||
|         139, 139, 140, 140, 141, 141, 142, 142}; | ||||
|  | ||||
|     /* | ||||
|        Process a set of code lengths to create a canonical Huffman code.  The | ||||
|        code lengths are lens[0..codes-1].  Each length corresponds to the | ||||
|        symbols 0..codes-1.  The Huffman code is generated by first sorting the | ||||
|        symbols by length from short to long, and retaining the symbol order | ||||
|        for codes with equal lengths.  Then the code starts with all zero bits | ||||
|        for the first code of the shortest length, and the codes are integer | ||||
|        increments for the same length, and zeros are appended as the length | ||||
|        increases.  For the deflate format, these bits are stored backwards | ||||
|        from their more natural integer increment ordering, and so when the | ||||
|        decoding tables are built in the large loop below, the integer codes | ||||
|        are incremented backwards. | ||||
|  | ||||
|        This routine assumes, but does not check, that all of the entries in | ||||
|        lens[] are in the range 0..MAXBITS.  The caller must assure this. | ||||
|        1..MAXBITS is interpreted as that code length.  zero means that that | ||||
|        symbol does not occur in this code. | ||||
|  | ||||
|        The codes are sorted by computing a count of codes for each length, | ||||
|        creating from that a table of starting indices for each length in the | ||||
|        sorted table, and then entering the symbols in order in the sorted | ||||
|        table.  The sorted table is work[], with that space being provided by | ||||
|        the caller. | ||||
|  | ||||
|        The length counts are used for other purposes as well, i.e. finding | ||||
|        the minimum and maximum length codes, determining if there are any | ||||
|        codes at all, checking for a valid set of lengths, and looking ahead | ||||
|        at length counts to determine sub-table sizes when building the | ||||
|        decoding tables. | ||||
|      */ | ||||
|  | ||||
|     /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */ | ||||
|     for (len = 0; len <= MAXBITS; len++) | ||||
|         count[len] = 0; | ||||
|     for (sym = 0; sym < codes; sym++) | ||||
|         count[lens[sym]]++; | ||||
|  | ||||
|     /* bound code lengths, force root to be within code lengths */ | ||||
|     root = *bits; | ||||
|     for (max = MAXBITS; max >= 1; max--) | ||||
|         if (count[max] != 0) break; | ||||
|     if (root > max) root = max; | ||||
|     if (max == 0) return -1;            /* no codes! */ | ||||
|     for (min = 1; min <= MAXBITS; min++) | ||||
|         if (count[min] != 0) break; | ||||
|     if (root < min) root = min; | ||||
|  | ||||
|     /* check for an over-subscribed or incomplete set of lengths */ | ||||
|     left = 1; | ||||
|     for (len = 1; len <= MAXBITS; len++) { | ||||
|         left <<= 1; | ||||
|         left -= count[len]; | ||||
|         if (left < 0) return -1;        /* over-subscribed */ | ||||
|     } | ||||
|     if (left > 0 && (type == CODES || max != 1)) | ||||
|         return -1;                      /* incomplete set */ | ||||
|  | ||||
|     /* generate offsets into symbol table for each length for sorting */ | ||||
|     offs[1] = 0; | ||||
|     for (len = 1; len < MAXBITS; len++) | ||||
|         offs[len + 1] = offs[len] + count[len]; | ||||
|  | ||||
|     /* sort symbols by length, by symbol order within each length */ | ||||
|     for (sym = 0; sym < codes; sym++) | ||||
|         if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym; | ||||
|  | ||||
|     /* | ||||
|        Create and fill in decoding tables.  In this loop, the table being | ||||
|        filled is at next and has curr index bits.  The code being used is huff | ||||
|        with length len.  That code is converted to an index by dropping drop | ||||
|        bits off of the bottom.  For codes where len is less than drop + curr, | ||||
|        those top drop + curr - len bits are incremented through all values to | ||||
|        fill the table with replicated entries. | ||||
|  | ||||
|        root is the number of index bits for the root table.  When len exceeds | ||||
|        root, sub-tables are created pointed to by the root entry with an index | ||||
|        of the low root bits of huff.  This is saved in low to check for when a | ||||
|        new sub-table should be started.  drop is zero when the root table is | ||||
|        being filled, and drop is root when sub-tables are being filled. | ||||
|  | ||||
|        When a new sub-table is needed, it is necessary to look ahead in the | ||||
|        code lengths to determine what size sub-table is needed.  The length | ||||
|        counts are used for this, and so count[] is decremented as codes are | ||||
|        entered in the tables. | ||||
|  | ||||
|        used keeps track of how many table entries have been allocated from the | ||||
|        provided *table space.  It is checked for LENS and DIST tables against | ||||
|        the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in | ||||
|        the initial root table size constants.  See the comments in inftree9.h | ||||
|        for more information. | ||||
|  | ||||
|        sym increments through all symbols, and the loop terminates when | ||||
|        all codes of length max, i.e. all codes, have been processed.  This | ||||
|        routine permits incomplete codes, so another loop after this one fills | ||||
|        in the rest of the decoding tables with invalid code markers. | ||||
|      */ | ||||
|  | ||||
|     /* set up for code type */ | ||||
|     switch (type) { | ||||
|     case CODES: | ||||
|         base = extra = work;    /* dummy value--not used */ | ||||
|         end = 19; | ||||
|         break; | ||||
|     case LENS: | ||||
|         base = lbase; | ||||
|         base -= 257; | ||||
|         extra = lext; | ||||
|         extra -= 257; | ||||
|         end = 256; | ||||
|         break; | ||||
|     default:            /* DISTS */ | ||||
|         base = dbase; | ||||
|         extra = dext; | ||||
|         end = -1; | ||||
|     } | ||||
|  | ||||
|     /* initialize state for loop */ | ||||
|     huff = 0;                   /* starting code */ | ||||
|     sym = 0;                    /* starting code symbol */ | ||||
|     len = min;                  /* starting code length */ | ||||
|     next = *table;              /* current table to fill in */ | ||||
|     curr = root;                /* current table index bits */ | ||||
|     drop = 0;                   /* current bits to drop from code for index */ | ||||
|     low = (unsigned)(-1);       /* trigger new sub-table when len > root */ | ||||
|     used = 1U << root;          /* use root table entries */ | ||||
|     mask = used - 1;            /* mask for comparing low */ | ||||
|  | ||||
|     /* check available table space */ | ||||
|     if ((type == LENS && used >= ENOUGH_LENS) || | ||||
|         (type == DISTS && used >= ENOUGH_DISTS)) | ||||
|         return 1; | ||||
|  | ||||
|     /* process all codes and make table entries */ | ||||
|     for (;;) { | ||||
|         /* create table entry */ | ||||
|         this.bits = (unsigned char)(len - drop); | ||||
|         if ((int)(work[sym]) < end) { | ||||
|             this.op = (unsigned char)0; | ||||
|             this.val = work[sym]; | ||||
|         } | ||||
|         else if ((int)(work[sym]) > end) { | ||||
|             this.op = (unsigned char)(extra[work[sym]]); | ||||
|             this.val = base[work[sym]]; | ||||
|         } | ||||
|         else { | ||||
|             this.op = (unsigned char)(32 + 64);         /* end of block */ | ||||
|             this.val = 0; | ||||
|         } | ||||
|  | ||||
|         /* replicate for those indices with low len bits equal to huff */ | ||||
|         incr = 1U << (len - drop); | ||||
|         fill = 1U << curr; | ||||
|         do { | ||||
|             fill -= incr; | ||||
|             next[(huff >> drop) + fill] = this; | ||||
|         } while (fill != 0); | ||||
|  | ||||
|         /* backwards increment the len-bit code huff */ | ||||
|         incr = 1U << (len - 1); | ||||
|         while (huff & incr) | ||||
|             incr >>= 1; | ||||
|         if (incr != 0) { | ||||
|             huff &= incr - 1; | ||||
|             huff += incr; | ||||
|         } | ||||
|         else | ||||
|             huff = 0; | ||||
|  | ||||
|         /* go to next symbol, update count, len */ | ||||
|         sym++; | ||||
|         if (--(count[len]) == 0) { | ||||
|             if (len == max) break; | ||||
|             len = lens[work[sym]]; | ||||
|         } | ||||
|  | ||||
|         /* create new sub-table if needed */ | ||||
|         if (len > root && (huff & mask) != low) { | ||||
|             /* if first time, transition to sub-tables */ | ||||
|             if (drop == 0) | ||||
|                 drop = root; | ||||
|  | ||||
|             /* increment past last table */ | ||||
|             next += 1U << curr; | ||||
|  | ||||
|             /* determine length of next table */ | ||||
|             curr = len - drop; | ||||
|             left = (int)(1 << curr); | ||||
|             while (curr + drop < max) { | ||||
|                 left -= count[curr + drop]; | ||||
|                 if (left <= 0) break; | ||||
|                 curr++; | ||||
|                 left <<= 1; | ||||
|             } | ||||
|  | ||||
|             /* check for enough space */ | ||||
|             used += 1U << curr; | ||||
|             if ((type == LENS && used >= ENOUGH_LENS) || | ||||
|                 (type == DISTS && used >= ENOUGH_DISTS)) | ||||
|                 return 1; | ||||
|  | ||||
|             /* point entry in root table to sub-table */ | ||||
|             low = huff & mask; | ||||
|             (*table)[low].op = (unsigned char)curr; | ||||
|             (*table)[low].bits = (unsigned char)root; | ||||
|             (*table)[low].val = (unsigned short)(next - *table); | ||||
|         } | ||||
|     } | ||||
|  | ||||
|     /* | ||||
|        Fill in rest of table for incomplete codes.  This loop is similar to the | ||||
|        loop above in incrementing huff for table indices.  It is assumed that | ||||
|        len is equal to curr + drop, so there is no loop needed to increment | ||||
|        through high index bits.  When the current sub-table is filled, the loop | ||||
|        drops back to the root table to fill in any remaining entries there. | ||||
|      */ | ||||
|     this.op = (unsigned char)64;                /* invalid code marker */ | ||||
|     this.bits = (unsigned char)(len - drop); | ||||
|     this.val = (unsigned short)0; | ||||
|     while (huff != 0) { | ||||
|         /* when done with sub-table, drop back to root table */ | ||||
|         if (drop != 0 && (huff & mask) != low) { | ||||
|             drop = 0; | ||||
|             len = root; | ||||
|             next = *table; | ||||
|             curr = root; | ||||
|             this.bits = (unsigned char)len; | ||||
|         } | ||||
|  | ||||
|         /* put invalid code marker in table */ | ||||
|         next[huff >> drop] = this; | ||||
|  | ||||
|         /* backwards increment the len-bit code huff */ | ||||
|         incr = 1U << (len - 1); | ||||
|         while (huff & incr) | ||||
|             incr >>= 1; | ||||
|         if (incr != 0) { | ||||
|             huff &= incr - 1; | ||||
|             huff += incr; | ||||
|         } | ||||
|         else | ||||
|             huff = 0; | ||||
|     } | ||||
|  | ||||
|     /* set return parameters */ | ||||
|     *table += used; | ||||
|     *bits = root; | ||||
|     return 0; | ||||
| } | ||||
							
								
								
									
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								third_party/zlib/contrib/infback9/inftree9.h
									
									
									
									
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							| @@ -0,0 +1,61 @@ | ||||
| /* inftree9.h -- header to use inftree9.c | ||||
|  * Copyright (C) 1995-2008 Mark Adler | ||||
|  * For conditions of distribution and use, see copyright notice in zlib.h | ||||
|  */ | ||||
|  | ||||
| /* WARNING: this file should *not* be used by applications. It is | ||||
|    part of the implementation of the compression library and is | ||||
|    subject to change. Applications should only use zlib.h. | ||||
|  */ | ||||
|  | ||||
| /* Structure for decoding tables.  Each entry provides either the | ||||
|    information needed to do the operation requested by the code that | ||||
|    indexed that table entry, or it provides a pointer to another | ||||
|    table that indexes more bits of the code.  op indicates whether | ||||
|    the entry is a pointer to another table, a literal, a length or | ||||
|    distance, an end-of-block, or an invalid code.  For a table | ||||
|    pointer, the low four bits of op is the number of index bits of | ||||
|    that table.  For a length or distance, the low four bits of op | ||||
|    is the number of extra bits to get after the code.  bits is | ||||
|    the number of bits in this code or part of the code to drop off | ||||
|    of the bit buffer.  val is the actual byte to output in the case | ||||
|    of a literal, the base length or distance, or the offset from | ||||
|    the current table to the next table.  Each entry is four bytes. */ | ||||
| typedef struct { | ||||
|     unsigned char op;           /* operation, extra bits, table bits */ | ||||
|     unsigned char bits;         /* bits in this part of the code */ | ||||
|     unsigned short val;         /* offset in table or code value */ | ||||
| } code; | ||||
|  | ||||
| /* op values as set by inflate_table(): | ||||
|     00000000 - literal | ||||
|     0000tttt - table link, tttt != 0 is the number of table index bits | ||||
|     100eeeee - length or distance, eeee is the number of extra bits | ||||
|     01100000 - end of block | ||||
|     01000000 - invalid code | ||||
|  */ | ||||
|  | ||||
| /* Maximum size of the dynamic table.  The maximum number of code structures is | ||||
|    1446, which is the sum of 852 for literal/length codes and 594 for distance | ||||
|    codes.  These values were found by exhaustive searches using the program | ||||
|    examples/enough.c found in the zlib distribtution.  The arguments to that | ||||
|    program are the number of symbols, the initial root table size, and the | ||||
|    maximum bit length of a code.  "enough 286 9 15" for literal/length codes | ||||
|    returns returns 852, and "enough 32 6 15" for distance codes returns 594. | ||||
|    The initial root table size (9 or 6) is found in the fifth argument of the | ||||
|    inflate_table() calls in infback9.c.  If the root table size is changed, | ||||
|    then these maximum sizes would be need to be recalculated and updated. */ | ||||
| #define ENOUGH_LENS 852 | ||||
| #define ENOUGH_DISTS 594 | ||||
| #define ENOUGH (ENOUGH_LENS+ENOUGH_DISTS) | ||||
|  | ||||
| /* Type of code to build for inflate_table9() */ | ||||
| typedef enum { | ||||
|     CODES, | ||||
|     LENS, | ||||
|     DISTS | ||||
| } codetype; | ||||
|  | ||||
| extern int inflate_table9 OF((codetype type, unsigned short FAR *lens, | ||||
|                              unsigned codes, code FAR * FAR *table, | ||||
|                              unsigned FAR *bits, unsigned short FAR *work)); | ||||
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