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re-enable history buffer (used as sliding window for decompress)

This commit is contained in:
Mike Tinglof 2012-01-28 01:56:55 -05:00
parent 0fa6748c52
commit b0ac240f31
1 changed files with 5 additions and 6 deletions
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11
include/jsunzip.js
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@ -198,7 +198,7 @@ function JSUnzip() {
*/
"use strict";
function TINF() {
this.OK = 0;
@ -502,16 +502,16 @@ this.inflate_block_data = function(d, lt, dt)
dist = this.decode_symbol(d, dt);
/* possibly get more bits from distance code */
offs = ddestlength - this.read_bits(d, this.dist_bits[dist], this.dist_base[dist]);
offs = d.history.length - this.read_bits(d, this.dist_bits[dist], this.dist_base[dist]);
if (offs < 0)
throw ("Invalid zlib offset " + offs);
/* copy match */
for (i = offs; i < offs + length; ++i) {
ddest[ddestlength++] = ddest[i];
//ddest[ddestlength++] = d.history[i];
//d.history.push(d.history[i]);
//ddest[ddestlength++] = ddest[i];
ddest[ddestlength++] = d.history[i];
d.history.push(d.history[i]);
}
}
}
@ -657,7 +657,6 @@ this.uncompress = function(source, offset)
} while (!bfinal && d.sourceIndex < d.source.length);
//d.history.push.apply(d.history, d.dest);
d.history = d.history.slice(-this.WINDOW_SIZE);
return { 'status' : this.OK, 'data' : d.dest };