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Code Issues Releases Wiki Activity

Make bitstreams pushable

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codedread 2018-01-21 01:49:17 -08:00
parent 26d06e8d3b
commit 5b10c1a986
3 changed files with 132 additions and 32 deletions
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11
io/bytestream.js
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@ -13,7 +13,6 @@ var bitjs = bitjs || {};
bitjs.io = bitjs.io || {};
// TODO: Add method for pushing bits (multiple arrays) and have tests.
// TODO: Add method for tee-ing off the stream with tests.
/**
* This object allows you to peek and consume bytes as numbers and strings
@ -41,7 +40,7 @@ bitjs.io.ByteStream = class {
* Returns how many bytes are currently in the stream left to be read.
* @private
*/
getBytesLeft_() {
getNumBytesLeft_() {
const bytesInCurrentPage = (this.bytes.byteLength - this.ptr);
return this.pages_.reduce((acc, arr) => acc + arr.length, bytesInCurrentPage);
}
@ -78,7 +77,7 @@ bitjs.io.ByteStream = class {
// TODO: Throw an error if n > 4.
if (this.getBytesLeft_() < num) {
if (this.getNumBytesLeft_() < num) {
throw 'Error! Overflowed the byte stream while peekNumber()! n=' + num +
', ptr=' + this.ptr + ', bytes.length=' + this.bytes.length;
}
@ -157,7 +156,7 @@ bitjs.io.ByteStream = class {
return new Uint8Array();
}
const totalBytesLeft = this.getBytesLeft_();
const totalBytesLeft = this.getNumBytesLeft_();
if (num > totalBytesLeft) {
throw 'Error! Overflowed the byte stream! n=' + num + ', ptr=' + this.ptr +
', bytes.length=' + this.bytes.length;
@ -204,7 +203,7 @@ bitjs.io.ByteStream = class {
return '';
}
const totalBytesLeft = this.getBytesLeft_();
const totalBytesLeft = this.getNumBytesLeft_();
if (num > totalBytesLeft) {
throw 'Error! Overflowed the byte stream while peekString()! n=' + num +
', ptr=' + this.ptr + ', bytes.length=' + this.bytes.length;
@ -243,7 +242,7 @@ bitjs.io.ByteStream = class {
*/
push(ab) {
if (!(ab instanceof ArrayBuffer)) {
throw 'Error! push() called with an invalid ArrayBuffer object';
throw 'Error! ByteStream.push() called with an invalid ArrayBuffer object';
}
this.pages_.push(new Uint8Array(ab));