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authorStephane Desneux <stephane.desneux@iot.bzh>2016-05-31 18:16:48 +0200
committerStephane Desneux <stephane.desneux@iot.bzh>2016-05-31 18:16:48 +0200
commit5b1e6cc132f44262a873fa8296a2a3e1017b0278 (patch)
tree43b2cd54e2e300b399ff3f2af4458a2c4ed8a144 /afb-client/bower_components/jszip/lib/dataReader.js
parentf7d2f9ac4168ee5064580c666d508667a73cefc0 (diff)
parent85ace9c1ce9a98e9b8a22f045c7dd752b38d9129 (diff)
Merge afb-client
Diffstat (limited to 'afb-client/bower_components/jszip/lib/dataReader.js')
-rw-r--r--afb-client/bower_components/jszip/lib/dataReader.js107
1 files changed, 107 insertions, 0 deletions
diff --git a/afb-client/bower_components/jszip/lib/dataReader.js b/afb-client/bower_components/jszip/lib/dataReader.js
new file mode 100644
index 0000000..22e8cb3
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+++ b/afb-client/bower_components/jszip/lib/dataReader.js
@@ -0,0 +1,107 @@
+'use strict';
+var utils = require('./utils');
+
+function DataReader(data) {
+ this.data = null; // type : see implementation
+ this.length = 0;
+ this.index = 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 specifed 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 < 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
+ },
+ /**
+ * Get the next date.
+ * @return {Date} the date.
+ */
+ readDate: function() {
+ var dostime = this.readInt(4);
+ return new Date(
+ ((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;