Adding integrated tile server

[simantics/district.git] / org.simantics.maps.server / node / node-v4.8.0-win-x64 / node_modules / npm / node_modules / fstream / lib / file-reader.js

diff --git a/org.simantics.maps.server/node/node-v4.8.0-win-x64/node_modules/npm/node_modules/fstream/lib/file-reader.js b/org.simantics.maps.server/node/node-v4.8.0-win-x64/node_modules/npm/node_modules/fstream/lib/file-reader.js
new file mode 100644 (file)
index 0000000..baa01f4
--- /dev/null
+++ b/org.simantics.maps.server/node/node-v4.8.0-win-x64/node_modules/npm/node_modules/fstream/lib/file-reader.js
@@ -0,0 +1,150 @@
+// Basically just a wrapper around an fs.ReadStream
+
+module.exports = FileReader
+
+var fs = require('graceful-fs')
+var inherits = require('inherits')
+var Reader = require('./reader.js')
+var EOF = {EOF: true}
+var CLOSE = {CLOSE: true}
+
+inherits(FileReader, Reader)
+
+function FileReader (props) {
+  // console.error("    FR create", props.path, props.size, new Error().stack)
+  var self = this
+  if (!(self instanceof FileReader)) {
+    throw new Error('FileReader must be called as constructor.')
+  }
+
+  // should already be established as a File type
+  // XXX Todo: preserve hardlinks by tracking dev+inode+nlink,
+  // with a HardLinkReader class.
+  if (!((props.type === 'Link' && props.Link) ||
+    (props.type === 'File' && props.File))) {
+    throw new Error('Non-file type ' + props.type)
+  }
+
+  self._buffer = []
+  self._bytesEmitted = 0
+  Reader.call(self, props)
+}
+
+FileReader.prototype._getStream = function () {
+  var self = this
+  var stream = self._stream = fs.createReadStream(self._path, self.props)
+
+  if (self.props.blksize) {
+    stream.bufferSize = self.props.blksize
+  }
+
+  stream.on('open', self.emit.bind(self, 'open'))
+
+  stream.on('data', function (c) {
+    // console.error('\t\t%d %s', c.length, self.basename)
+    self._bytesEmitted += c.length
+    // no point saving empty chunks
+    if (!c.length) {
+      return
+    } else if (self._paused || self._buffer.length) {
+      self._buffer.push(c)
+      self._read()
+    } else self.emit('data', c)
+  })
+
+  stream.on('end', function () {
+    if (self._paused || self._buffer.length) {
+      // console.error('FR Buffering End', self._path)
+      self._buffer.push(EOF)
+      self._read()
+    } else {
+      self.emit('end')
+    }
+
+    if (self._bytesEmitted !== self.props.size) {
+      self.error("Didn't get expected byte count\n" +
+        'expect: ' + self.props.size + '\n' +
+        'actual: ' + self._bytesEmitted)
+    }
+  })
+
+  stream.on('close', function () {
+    if (self._paused || self._buffer.length) {
+      // console.error('FR Buffering Close', self._path)
+      self._buffer.push(CLOSE)
+      self._read()
+    } else {
+      // console.error('FR close 1', self._path)
+      self.emit('close')
+    }
+  })
+
+  stream.on('error', function (e) {
+    self.emit('error', e)
+  })
+
+  self._read()
+}
+
+FileReader.prototype._read = function () {
+  var self = this
+  // console.error('FR _read', self._path)
+  if (self._paused) {
+    // console.error('FR _read paused', self._path)
+    return
+  }
+
+  if (!self._stream) {
+    // console.error('FR _getStream calling', self._path)
+    return self._getStream()
+  }
+
+  // clear out the buffer, if there is one.
+  if (self._buffer.length) {
+    // console.error('FR _read has buffer', self._buffer.length, self._path)
+    var buf = self._buffer
+    for (var i = 0, l = buf.length; i < l; i++) {
+      var c = buf[i]
+      if (c === EOF) {
+        // console.error('FR Read emitting buffered end', self._path)
+        self.emit('end')
+      } else if (c === CLOSE) {
+        // console.error('FR Read emitting buffered close', self._path)
+        self.emit('close')
+      } else {
+        // console.error('FR Read emitting buffered data', self._path)
+        self.emit('data', c)
+      }
+
+      if (self._paused) {
+        // console.error('FR Read Re-pausing at '+i, self._path)
+        self._buffer = buf.slice(i)
+        return
+      }
+    }
+    self._buffer.length = 0
+  }
+// console.error("FR _read done")
+// that's about all there is to it.
+}
+
+FileReader.prototype.pause = function (who) {
+  var self = this
+  // console.error('FR Pause', self._path)
+  if (self._paused) return
+  who = who || self
+  self._paused = true
+  if (self._stream) self._stream.pause()
+  self.emit('pause', who)
+}
+
+FileReader.prototype.resume = function (who) {
+  var self = this
+  // console.error('FR Resume', self._path)
+  if (!self._paused) return
+  who = who || self
+  self.emit('resume', who)
+  self._paused = false
+  if (self._stream) self._stream.resume()
+  self._read()
+}