Configring node js.

node_modules/jszip/lib/reader/DataReader.js

@@ -0,0 +1,116 @@
+'use strict';
+var utils = require('../utils');
+
+function DataReader(data) {
+    this.data = data; // type : see implementation
+    this.length = data.length;
+    this.index = 0;
+    this.zero = 0;
+}
+DataReader.prototype = {
+    /**
+     * Check that the offset will not go too far.
+     * @param {string} offset the additional offset to check.
+     * @throws {Error} an Error if the offset is out of bounds.
+     */
+    checkOffset: function(offset) {
+        this.checkIndex(this.index + offset);
+    },
+    /**
+     * Check that the specified index will not be too far.
+     * @param {string} newIndex the index to check.
+     * @throws {Error} an Error if the index is out of bounds.
+     */
+    checkIndex: function(newIndex) {
+        if (this.length < this.zero + newIndex || newIndex < 0) {
+            throw new Error("End of data reached (data length = " + this.length + ", asked index = " + (newIndex) + "). Corrupted zip ?");
+        }
+    },
+    /**
+     * Change the index.
+     * @param {number} newIndex The new index.
+     * @throws {Error} if the new index is out of the data.
+     */
+    setIndex: function(newIndex) {
+        this.checkIndex(newIndex);
+        this.index = newIndex;
+    },
+    /**
+     * Skip the next n bytes.
+     * @param {number} n the number of bytes to skip.
+     * @throws {Error} if the new index is out of the data.
+     */
+    skip: function(n) {
+        this.setIndex(this.index + n);
+    },
+    /**
+     * Get the byte at the specified index.
+     * @param {number} i the index to use.
+     * @return {number} a byte.
+     */
+    byteAt: function(i) {
+        // see implementations
+    },
+    /**
+     * Get the next number with a given byte size.
+     * @param {number} size the number of bytes to read.
+     * @return {number} the corresponding number.
+     */
+    readInt: function(size) {
+        var result = 0,
+            i;
+        this.checkOffset(size);
+        for (i = this.index + size - 1; i >= this.index; i--) {
+            result = (result << 8) + this.byteAt(i);
+        }
+        this.index += size;
+        return result;
+    },
+    /**
+     * Get the next string with a given byte size.
+     * @param {number} size the number of bytes to read.
+     * @return {string} the corresponding string.
+     */
+    readString: function(size) {
+        return utils.transformTo("string", this.readData(size));
+    },
+    /**
+     * Get raw data without conversion, <size> bytes.
+     * @param {number} size the number of bytes to read.
+     * @return {Object} the raw data, implementation specific.
+     */
+    readData: function(size) {
+        // see implementations
+    },
+    /**
+     * Find the last occurence of a zip signature (4 bytes).
+     * @param {string} sig the signature to find.
+     * @return {number} the index of the last occurence, -1 if not found.
+     */
+    lastIndexOfSignature: function(sig) {
+        // see implementations
+    },
+    /**
+     * Read the signature (4 bytes) at the current position and compare it with sig.
+     * @param {string} sig the expected signature
+     * @return {boolean} true if the signature matches, false otherwise.
+     */
+    readAndCheckSignature: function(sig) {
+        // see implementations
+    },
+    /**
+     * Get the next date.
+     * @return {Date} the date.
+     */
+    readDate: function() {
+        var dostime = this.readInt(4);
+        return new Date(Date.UTC(
+        ((dostime >> 25) & 0x7f) + 1980, // year
+        ((dostime >> 21) & 0x0f) - 1, // month
+        (dostime >> 16) & 0x1f, // day
+        (dostime >> 11) & 0x1f, // hour
+        (dostime >> 5) & 0x3f, // minute
+        (dostime & 0x1f) << 1)); // second
+    }
+};
+module.exports = DataReader;