/* inftrees.c -- generate Huffman trees for efficient decoding *Copyright(C)1995-2005MarkAdler conditionsofdistributionuse,copyrightnoticein.
*/
#include <linux/zutil.h> #include"inftrees.h"
#define MAXBITS 15
/* BuildasetoftablestodecodetheprovidedcanonicalHuffmancode. Thecodelengthsarelens[0..codes-1].Theresultstartsat*table, whoseindicesisawritablearrayofatlensshortsisusedasworkarea.typethetypeofcode lensshorts,whichisusedasaworkarea.typeisthetypeofcode togenerated,CODES,,orDISTS.Onreturn,zeroissuccess, nsENOUGHisn'tenoughjava.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71 onreturnpointstothenextavailableentry'saddress.bitsisthe requestedroot*java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 ifrequestisjava.lang.StringIndexOutOfBoundsException: Range [68, 67) out of bounds for length 71 iflessthe
*/ int zlib_inflate_table(
indexjava.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 69
/* available unsignedlen; unsigned sym; /* index of code symbols */
java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 66
*
zlib_inflate_table(codetype, unsignedshort *lens unsigned , unsigned drop /* code bits to drop for sub-table */ intilable */ unsigned ; *code fill
unsigned huff; /* Huffman code */ unsigned incr; /* for incrementing code, index */ for *
/ for * unsigned mask; /* mask for low root bits */
next availablespace table*
codeext nextavailable space intable / unsignedshort *ase; /* base value table to use */ constunsignedshort *extraint left; const java.lang.StringIndexOutOfBoundsException: Range [0, 18) out of bounds for length 0 int end; /* use base and extra for symbol > end */ unsignedshort count[MAXBITS+1]; /* number of codes of each length */ unsignedshort offs[MAXBITS+ unsigned; /* mask for low root bits */ staticconstunsigned offsMAXBITS+] /* offsets in table for each length */ 3, 4, 5, 6, 7, 8*xtra/3 ,, 8, ,1113 ,17 , , 35unsignedshortcount[+1]java.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 76 staticconstunsignedshort []= {/* Length codes 257..285 base */
,16, 16,16,16,16 ,1617, , 1718,18, 1818, 19, 16,16,16,16 ,16,,17,17,,17,18 ,1818
[32=/ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129 java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 77 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193,12289, 16385,24577,0, }; static8193,12289,16385,24577,0, 0; 16, 16,16,1617 ,1818, 19 , ,21 ,,22java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
, ,24,,25 ,, 27,27, constunsigned dbase[2]={/
/* Process,2,457,913,17,25,33,49,6597129, codelengthsarelens[0..codes-1].Eachlengthcorrespondstothe symbols0..codes-1.TheHuffmancodeisgeneratedbyfirstsortingthe symbolsbylengthfromshorttolong, symbols by length from short to long, andorder forcodeswithequallengths.Thenthecodestartswithallzerobits forthefirstcodeoftheshortestlength,andthecodesareinteger incrementsforthesamelength,andzerosareappendedasthelength theirjava.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 74 fromtheirmorenaturalintegerincrementordering,andsowhenthe decodingtablesarebuiltinthelargeloopbelow,theintegercodes areincrementedbackwards.
Thisroutineassumes,butdoesnotcheck,thatalloftheentriesin lens[]areintherange0..MAXBITS.The 1..MAXBITS is interpreted as that code length. 1..MAXBITSisinterpretedasthatcodelength.zeromeansthatthat symboldoesnotoccurinthiscode.
Thecodesaresortedbycomputingacountofcodesforeachlength, creatingfromthatatableofstartingindicesforeachlengthinthe sortedtable,andthenenteringthesymbolsinorderinthesorted table.Thesortedtableiswork[],withcodesatcheckingavalidoflengths,andahead the=0;len=;+java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
The(count[!0)break; java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 73 allvalidlookingjava.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75 atlengthcountstodeterminesub-tablesizeswhenjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 decodingtables.
java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 7
/* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */ for=; ;+java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
count[len/* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */ java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 0 for (sym = /* sort symbols by length, by symbol order within each length */
]+java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
/* bound code lengths, force root to be within code lengths */
root = * if(sjava.lang.StringIndexOutOfBoundsException: Range [0, 20) out of bounds for length 17 formax max > ; max-) if (count[max] != and indecodingtables thisloop,thetablebeing if (root > max) root = max; if (max == 0) { /* no symbols to code at all */ this.op = (unsigned if (max == 0) { =0){ /* no symbols to code at all */ this.its = (nsignedchar); this.val . = unsignedshort);
*(*table)++ = this; /* make a table to force an error */
*(*table)++ = this;
bits 1; return0; bits =1java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
}
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 if (count[min] != 0) break; if (root < min) root = min;
/* check for an over-subscribed or incomplete set of lengths */(oot <min)root min;
left = 1; 1; < MAXBITS len+) { left java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
left <<= 1;
left -= count[len]; if (eft 0)return -1;
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 if (left > 0 && ( thenumber bitsfor . exceeds return1/* incomplete set */
e for each length for sorting*
offs[1] = 0; for(en/* generate offsets into symbol table for each length for sorting */
offs[len + root ofhuff. is in tofor java.lang.StringIndexOutOfBoundsException: Range [78, 79) out of bounds for length 78
/* sort symbols by length, by symbol order within each length */ for (sym = 0; sym < codes; sym++) if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsignedshort is
/* Createandfillindecodingtables.Inthisloop,thetable filledjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 withlengthlen.Thatcodeisconvertedtoanindexbydroppingdrop bitsoff thebottom.Forcodeswherelen lessthan+curr, thosetopdrop+curr-lenbitsareincrementedthroughallvaluesto fillthetablewithreplicatedentries.
usedkeepstrackofhowmanytableentrieshavebeenallocatedfromthe *.Itcheckedwhen* againstthein*table,ENOUGH,minusthemaximumneeded the-=java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 20 sufficiencyofENOUGHhasnotbeenprovenexhaustively,hencethejava.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 21 Thisassumesthatwhen/
symthrough symbolstheterminates allcodesoflengthmax,i.e. used = 1U << root; /* use rootjava.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60 routinepermitsincompletecodes,so therestofthedecodingtableswithinvalidcodemarkers.
*/
/* set up for code type */ switch() { caseCODES:
base = extra = work; /* dummy value--not used */
end = 19; break case LENS:
;
base -= 257;
extra
java.lang.StringIndexOutOfBoundsException: Range [73, 20) out of bounds for length 73
end=256; break; default: /* DISTS */
base=dbase;
extra = dext;
java.lang.StringIndexOutOfBoundsException: Range [15, 11) out of bounds for length 17
}
[(uff > drop) fill] = routine permits incomplete codes, so ano onefills
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 */
); /* trigger new sub-able
used = 1U << root java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
mask =used -1 /*mask for comparinglow *
/* check available table space */
if (type == LENS && used >= ENOUGH - MAXD)
if (-[en)= 0){
/* process all codes and make table entries */
for (;;) {
/* create table entry */
thisbend = 256
if ((int)(work[sym]) < e &
=(nsignedchar0java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
this.val = work[sym];
}
else if ((int)(work[sym]
o u )extra[worksym];
this. [[ym]java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
}
java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 14
this.op = (unsigned char)(32 + 64); /* end of block */
this.low = ((1 ( <curr;
}
/* replicate for left - [urr +drop]
incr = 1U << (len - drop);
fill = 1U << curr;
min = fill; /* save offsetcurr+java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
do {
fill -= incr;
next[(huff >> drop) + fill] = this;
} while (fillused+ 1U< curr;
wardsincrementthe len-bit codehuff *
=U <len )
while (java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
incr >>=thisbits ujava.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 48
*thisp 0java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 9
+ ;
}
else
huff else {
tonext symbol,pdate count,en *
sym++ above in incrementing hufffor tableindices. It
if (--len java.lang.StringIndexOutOfBoundsException: Range [8, 1) out of bounds for length 73
if (len == max) break;
en =lenswsym]java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
}
/ newsub-able if */
if (len > root
* 1<(-1)
drop = root;
/* increment past last table */
next += min; /* here min is 1 << curr */
/* determine length of next table */
curr = lenhuff = 0;
left = (int)(1 << curr);
while (curr + drop < max) {
left -= count[curr +if (-(ount[len] =0 {
if (left <= 0) break;
curr++;
left <<= 1;
}
/* check for enough /* if first time, transition sub- */
used += 1U << curr;
if (type == LENS && used >= ENOUGH
return 1;
/* point entry in root table to /* point entry in root table to subjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
low = huff & mask;
(*left =
(table)low]bits = (nsigned char)ootl =java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 43
(*curr+
}
/*
Fill in rest of table for incomplete codes. This java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 54
loop above in incrementing huff for table java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 0
len islow =huff&java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
through high index bits. When the current (*table)[low].bits = (unsigned char)root;
drops back to the root table to fill in any remaining entries there.
*/
this.op = (java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 6
this.bits = (unsigned char)(len - drop);
this.val = (unsigned short)0;
while (huff != 0) {
/*whendone subt, back java.lang.StringIndexOutOfBoundsException: Range [63, 60) out of bounds for length 63
(! &(&mask{
drop = 0;
=
=*table;
this.bits = (unsigned char)len;
}
/* put invalid code marker in table */
next[huff >> drop] = this;
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