Sha256: c939c7a04855c135053ad9353c8d47c4f5eb783e0ede526899f964ce906337ef
Contents?: true
Size: 1.94 KB
Versions: 105
Compression:
Stored size: 1.94 KB
Contents
function CircularBuffer(capacity) {
var readPoint = 0;
var writePoint = 0;
var buffer = new Array(capacity);
return {
read: function () {
if (isBufferEmpty()) { throw new BufferEmptyException(); }
var data = buffer[readPoint];
buffer[readPoint] = null;
updateReadPoint();
return data;
},
write: function (data) {
updateBuffer(data, function () {
if (isBufferFull()) { throw new BufferFullException(); }
buffer[writePoint] = data;
});
},
forceWrite: function (data) {
updateBuffer(data, function () {
if (isBufferFull()) { updateReadPoint(); }
buffer[writePoint] = data;
});
},
clear: function () {
readPoint = 0;
writePoint = 0;
buffer = new Array(capacity);
},
isFull: function () {
return isBufferFull();
},
isEmpty: function () {
return isBufferEmpty();
}
};
function isBufferEmpty() {
return buffer.every(isEmpty);
}
function isBufferFull() {
return buffer.filter(isFull).length === capacity;
}
function updateBuffer(data, callback) {
if (isEmpty(data)) { return; }
callback();
updateWritePoint();
}
function updateWritePoint() {
writePoint = (writePoint + 1) % capacity;
}
function updateReadPoint() {
readPoint = (readPoint + 1) % capacity;
}
function isFull(data) {
return !isEmpty(data);
}
function isEmpty(data) {
return !data;
}
}
function BufferEmptyException() {
this.name = 'BufferEmptyException';
this.message = 'Buffer is empty.';
}
function BufferFullException() {
this.name = 'BufferFullException';
this.message = 'Buffer is full.';
}
module.exports = {
circularBuffer: function (capacity) {
return new CircularBuffer(capacity);
},
bufferEmptyException: function () {
return new BufferEmptyException();
},
bufferFullException: function () {
return new BufferFullException();
}
};
Version data entries
105 entries across 105 versions & 1 rubygems