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Polished ungzip crc32 check

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This commit is contained in:
Vitaly Puzrin 2014-03-13 23:43:30 +04:00
parent 1d91d3b187
commit 21c21df425
1 changed files with 4 additions and 3 deletions
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7
lib/zlib/inflate.js
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@ -1356,8 +1356,8 @@ function inflate(strm, flush) {
while (bits < 32) { while (bits < 32) {
if (have === 0) { break inf_leave; } if (have === 0) { break inf_leave; }
have--; have--;
hold += input[next++] << bits; // Use '|' insdead of '+' to make sure that result is signed
hold >>>= 0; hold |= input[next++] << bits;
bits += 8; bits += 8;
} }
//===// //===//
@ -1371,7 +1371,8 @@ function inflate(strm, flush) {
} }
_out = left; _out = left;
if ((state.flags ? hold : ZSWAP32(hold) >>> 0) !== state.check >>> 0) { // NB: crc32 stored as signed 32-bit int, ZSWAP32 returns signed too
if ((state.flags ? hold : ZSWAP32(hold)) !== state.check) {
strm.msg = 'incorrect data check'; strm.msg = 'incorrect data check';
state.mode = BAD; state.mode = BAD;
break; break;