init

node_modules/qrcode/lib/core/numeric-data.js

@@ -0,0 +1,43 @@
+const Mode = require('./mode')
+
+function NumericData (data) {
+  this.mode = Mode.NUMERIC
+  this.data = data.toString()
+}
+
+NumericData.getBitsLength = function getBitsLength (length) {
+  return 10 * Math.floor(length / 3) + ((length % 3) ? ((length % 3) * 3 + 1) : 0)
+}
+
+NumericData.prototype.getLength = function getLength () {
+  return this.data.length
+}
+
+NumericData.prototype.getBitsLength = function getBitsLength () {
+  return NumericData.getBitsLength(this.data.length)
+}
+
+NumericData.prototype.write = function write (bitBuffer) {
+  let i, group, value
+
+  // The input data string is divided into groups of three digits,
+  // and each group is converted to its 10-bit binary equivalent.
+  for (i = 0; i + 3 <= this.data.length; i += 3) {
+    group = this.data.substr(i, 3)
+    value = parseInt(group, 10)
+
+    bitBuffer.put(value, 10)
+  }
+
+  // If the number of input digits is not an exact multiple of three,
+  // the final one or two digits are converted to 4 or 7 bits respectively.
+  const remainingNum = this.data.length - i
+  if (remainingNum > 0) {
+    group = this.data.substr(i)
+    value = parseInt(group, 10)
+
+    bitBuffer.put(value, remainingNum * 3 + 1)
+  }
+}
+
+module.exports = NumericData