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Update comic reader js

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This commit is contained in:
Ozzieisaacs
2019-06-17 19:48:17 +02:00
parent e67d707867
commit cd546eb6d4
9 changed files with 311 additions and 292 deletions
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42
cps/static/js/io/bitstream.js Normal file → Executable file
View File

@@ -8,6 +8,9 @@
* Copyright(c) 2011 Google Inc.
* Copyright(c) 2011 antimatter15
*/
/* global bitjs, Uint8Array */
var bitjs = bitjs || {};
bitjs.io = bitjs.io || {};
@@ -30,20 +33,20 @@ bitjs.io = bitjs.io || {};
* @param {ArrayBuffer} ab An ArrayBuffer object or a Uint8Array.
* @param {boolean} rtl Whether the stream reads bits from the byte starting
* from bit 7 to 0 (true) or bit 0 to 7 (false).
* @param {Number} opt_offset The offset into the ArrayBuffer
* @param {Number} opt_length The length of this BitStream
* @param {Number} optOffset The offset into the ArrayBuffer
* @param {Number} optLength The length of this BitStream
*/
bitjs.io.BitStream = function(ab, rtl, opt_offset, opt_length) {
bitjs.io.BitStream = function(ab, rtl, optOffset, optLength) {
if (!ab || !ab.toString || ab.toString() !== "[object ArrayBuffer]") {
throw "Error! BitArray constructed with an invalid ArrayBuffer object";
}
var offset = opt_offset || 0;
var length = opt_length || ab.byteLength;
var offset = optOffset || 0;
var length = optLength || ab.byteLength;
this.bytes = new Uint8Array(ab, offset, length);
this.bytePtr = 0; // tracks which byte we are on
this.bitPtr = 0; // tracks which bit we are on (can have values 0 through 7)
this.peekBits = rtl ? this.peekBits_rtl : this.peekBits_ltr;
this.peekBits = rtl ? this.peekBitsRtl : this.peekBitsLtr;
};
@@ -57,8 +60,8 @@ bitjs.io = bitjs.io || {};
* @param {boolean=} movePointers Whether to move the pointer, defaults false.
* @return {number} The peeked bits, as an unsigned number.
*/
bitjs.io.BitStream.prototype.peekBits_ltr = function(n, movePointers) {
if (n <= 0 || typeof n != typeof 1) {
bitjs.io.BitStream.prototype.peekBitsLtr = function(n, movePointers) {
if (n <= 0 || typeof n !== typeof 1) {
return 0;
}
@@ -77,12 +80,13 @@ bitjs.io = bitjs.io || {};
if (bytePtr >= bytes.length) {
throw "Error! Overflowed the bit stream! n=" + n + ", bytePtr=" + bytePtr + ", bytes.length=" +
bytes.length + ", bitPtr=" + bitPtr;
return -1;
// return -1;
}
var numBitsLeftInThisByte = (8 - bitPtr);
var mask;
if (n >= numBitsLeftInThisByte) {
var mask = (BITMASK[numBitsLeftInThisByte] << bitPtr);
mask = (BITMASK[numBitsLeftInThisByte] << bitPtr);
result |= (((bytes[bytePtr] & mask) >> bitPtr) << bitsIn);
bytePtr++;
@@ -90,7 +94,7 @@ bitjs.io = bitjs.io || {};
bitsIn += numBitsLeftInThisByte;
n -= numBitsLeftInThisByte;
} else {
var mask = (BITMASK[n] << bitPtr);
mask = (BITMASK[n] << bitPtr);
result |= (((bytes[bytePtr] & mask) >> bitPtr) << bitsIn);
bitPtr += n;
@@ -118,8 +122,8 @@ bitjs.io = bitjs.io || {};
* @param {boolean=} movePointers Whether to move the pointer, defaults false.
* @return {number} The peeked bits, as an unsigned number.
*/
bitjs.io.BitStream.prototype.peekBits_rtl = function(n, movePointers) {
if (n <= 0 || typeof n != typeof 1) {
bitjs.io.BitStream.prototype.peekBitsRtl = function(n, movePointers) {
if (n <= 0 || typeof n !== typeof 1) {
return 0;
}
@@ -138,7 +142,7 @@ bitjs.io = bitjs.io || {};
if (bytePtr >= bytes.length) {
throw "Error! Overflowed the bit stream! n=" + n + ", bytePtr=" + bytePtr + ", bytes.length=" +
bytes.length + ", bitPtr=" + bitPtr;
return -1;
// return -1;
}
var numBitsLeftInThisByte = (8 - bitPtr);
@@ -198,19 +202,19 @@ bitjs.io = bitjs.io || {};
* @return {Uint8Array} The subarray.
*/
bitjs.io.BitStream.prototype.peekBytes = function(n, movePointers) {
if (n <= 0 || typeof n != typeof 1) {
if (n <= 0 || typeof n !== typeof 1) {
return 0;
}
// from http://tools.ietf.org/html/rfc1951#page-11
// "Any bits of input up to the next byte boundary are ignored."
while (this.bitPtr != 0) {
while (this.bitPtr !== 0) {
this.readBits(1);
}
var movePointers = movePointers || false;
var bytePtr = this.bytePtr,
bitPtr = this.bitPtr;
var bytePtr = this.bytePtr;
// bitPtr = this.bitPtr;
var result = this.bytes.subarray(bytePtr, bytePtr + n);
@@ -230,4 +234,4 @@ bitjs.io = bitjs.io || {};
return this.peekBytes(n, true);
};
})();
})();

21
cps/static/js/io/bytebuffer.js
View File

@@ -8,6 +8,9 @@
* Copyright(c) 2011 Google Inc.
* Copyright(c) 2011 antimatter15
*/
/* global bitjs, Uint8Array */
var bitjs = bitjs || {};
bitjs.io = bitjs.io || {};
@@ -20,7 +23,7 @@ bitjs.io = bitjs.io || {};
* @constructor
*/
bitjs.io.ByteBuffer = function(numBytes) {
if (typeof numBytes != typeof 1 || numBytes <= 0) {
if (typeof numBytes !== typeof 1 || numBytes <= 0) {
throw "Error! ByteBuffer initialized with '" + numBytes + "'";
}
this.data = new Uint8Array(numBytes);
@@ -55,14 +58,14 @@ bitjs.io = bitjs.io || {};
*/
bitjs.io.ByteBuffer.prototype.writeNumber = function(num, numBytes) {
if (numBytes < 1) {
throw 'Trying to write into too few bytes: ' + numBytes;
throw "Trying to write into too few bytes: " + numBytes;
}
if (num < 0) {
throw 'Trying to write a negative number (' + num +
') as an unsigned number to an ArrayBuffer';
throw "Trying to write a negative number (" + num +
") as an unsigned number to an ArrayBuffer";
}
if (num > (Math.pow(2, numBytes * 8) - 1)) {
throw 'Trying to write ' + num + ' into only ' + numBytes + ' bytes';
throw "Trying to write " + num + " into only " + numBytes + " bytes";
}
// Roll 8-bits at a time into an array of bytes.
@@ -85,12 +88,12 @@ bitjs.io = bitjs.io || {};
*/
bitjs.io.ByteBuffer.prototype.writeSignedNumber = function(num, numBytes) {
if (numBytes < 1) {
throw 'Trying to write into too few bytes: ' + numBytes;
throw "Trying to write into too few bytes: " + numBytes;
}
var HALF = Math.pow(2, (numBytes * 8) - 1);
if (num >= HALF || num < -HALF) {
throw 'Trying to write ' + num + ' into only ' + numBytes + ' bytes';
throw "Trying to write " + num + " into only " + numBytes + " bytes";
}
// Roll 8-bits at a time into an array of bytes.
@@ -112,10 +115,10 @@ bitjs.io = bitjs.io || {};
for (var i = 0; i < str.length; ++i) {
var curByte = str.charCodeAt(i);
if (curByte < 0 || curByte > 255) {
throw 'Trying to write a non-ASCII string!';
throw "Trying to write a non-ASCII string!";
}
this.insertByte(curByte);
}
};
})();
})();

20
cps/static/js/io/bytestream.js
View File

@@ -8,6 +8,9 @@
* Copyright(c) 2011 Google Inc.
* Copyright(c) 2011 antimatter15
*/
/* global bitjs, Uint8Array */
var bitjs = bitjs || {};
bitjs.io = bitjs.io || {};
@@ -19,13 +22,13 @@ bitjs.io = bitjs.io || {};
* out of an ArrayBuffer. In this buffer, everything must be byte-aligned.
*
* @param {ArrayBuffer} ab The ArrayBuffer object.
* @param {number=} opt_offset The offset into the ArrayBuffer
* @param {number=} opt_length The length of this BitStream
* @param {number=} optOffset The offset into the ArrayBuffer
* @param {number=} optLength The length of this BitStream
* @constructor
*/
bitjs.io.ByteStream = function(ab, opt_offset, opt_length) {
var offset = opt_offset || 0;
var length = opt_length || ab.byteLength;
bitjs.io.ByteStream = function(ab, optOffset, optLength) {
var offset = optOffset || 0;
var length = optLength || ab.byteLength;
this.bytes = new Uint8Array(ab, offset, length);
this.ptr = 0;
};
@@ -40,8 +43,9 @@ bitjs.io = bitjs.io || {};
*/
bitjs.io.ByteStream.prototype.peekNumber = function(n) {
// TODO: return error if n would go past the end of the stream?
if (n <= 0 || typeof n != typeof 1)
if (n <= 0 || typeof n !== typeof 1) {
return -1;
}
var result = 0;
// read from last byte to first byte and roll them in
@@ -105,7 +109,7 @@ bitjs.io = bitjs.io || {};
* @return {Uint8Array} The subarray.
*/
bitjs.io.ByteStream.prototype.peekBytes = function(n, movePointers) {
if (n <= 0 || typeof n != typeof 1) {
if (n <= 0 || typeof n !== typeof 1) {
return null;
}
@@ -135,7 +139,7 @@ bitjs.io = bitjs.io || {};
* @return {string} The next n bytes as a string.
*/
bitjs.io.ByteStream.prototype.peekString = function(n) {
if (n <= 0 || typeof n != typeof 1) {
if (n <= 0 || typeof n !== typeof 1) {
return "";
}