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author | Stephane Desneux <stephane.desneux@iot.bzh> | 2016-05-31 18:16:48 +0200 |
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committer | Stephane Desneux <stephane.desneux@iot.bzh> | 2016-05-31 18:16:48 +0200 |
commit | 5b1e6cc132f44262a873fa8296a2a3e1017b0278 (patch) | |
tree | 43b2cd54e2e300b399ff3f2af4458a2c4ed8a144 /afb-client/bower_components/jszip/lib/dataReader.js | |
parent | f7d2f9ac4168ee5064580c666d508667a73cefc0 (diff) | |
parent | 85ace9c1ce9a98e9b8a22f045c7dd752b38d9129 (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.js | 107 |
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 --- /dev/null +++ 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; |