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fix for uncompressed flatestream blocks

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sbarman 2011-06-23 09:41:59 -07:00
parent 3f2bbbe919
commit 18afc896f6
1 changed files with 13 additions and 7 deletions
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20
pdf.js
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@ -479,17 +479,17 @@ var FlateStream = (function() {
array[i++] = what; array[i++] = what;
} }
var bytes = this.bytes;
var bytesPos = this.bytesPos;
// read block header // read block header
var hdr = this.getBits(3); var hdr = this.getBits(3);
if (hdr & 1) if (hdr & 1)
this.eof = true; this.eof = true;
hdr >>= 1; hdr >>= 1;
var b;
if (hdr == 0) { // uncompressed block if (hdr == 0) { // uncompressed block
var bytes = this.bytes;
var bytesPos = this.bytesPos;
var b;
if (typeof (b = bytes[bytesPos++]) == "undefined") if (typeof (b = bytes[bytesPos++]) == "undefined")
error("Bad block header in flate stream"); error("Bad block header in flate stream");
var blockLen = b; var blockLen = b;
@ -502,18 +502,24 @@ var FlateStream = (function() {
if (typeof (b = bytes[bytesPos++]) == "undefined") if (typeof (b = bytes[bytesPos++]) == "undefined")
error("Bad block header in flate stream"); error("Bad block header in flate stream");
check |= (b << 8); check |= (b << 8);
if (check != (~this.blockLen & 0xffff)) if (check != (~blockLen & 0xffff))
error("Bad uncompressed block length in flate stream"); error("Bad uncompressed block length in flate stream");
this.codeBuf = 0;
this.codeSize = 0;
var bufferLength = this.bufferLength; var bufferLength = this.bufferLength;
var buffer = this.ensureBuffer(bufferLength + blockLen); var buffer = this.ensureBuffer(bufferLength + blockLen);
this.bufferLength = bufferLength + blockLen; var end = bufferLength + blockLen;
for (var n = bufferLength; n < blockLen; ++n) { this.bufferLength = end;
for (var n = bufferLength; n < end; ++n) {
if (typeof (b = bytes[bytesPos++]) == "undefined") { if (typeof (b = bytes[bytesPos++]) == "undefined") {
this.eof = true; this.eof = true;
break; break;
} }
buffer[n] = b; buffer[n] = b;
} }
this.bytesPos = bytesPos;
return; return;
} }