cafe-grader-web

Location: cafe-grader-web/node_modules/restructure/src/DecodeStream.coffee

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Commit Description:
change logger to be limited by file size
Commit Description:
change logger to be limited by file size
References:
r839:ac14dcf5dad7 algo
File last commit:
r789:8cd7e8db7e38 default
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Action:
node_modules/restructure/src/DecodeStream.coffee | 67 lines | 1.4 KiB | text/coffeescript | CoffeeScriptLexer |
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try iconv = require 'iconv-lite'
class DecodeStream
constructor: (@buffer) ->
@pos = 0
@length = @buffer.length
@TYPES =
UInt8: 1
UInt16: 2
UInt24: 3
UInt32: 4
Int8: 1
Int16: 2
Int24: 3
Int32: 4
Float: 4
Double: 8
for key of Buffer.prototype when key.slice(0, 4) is 'read'
do (key) =>
bytes = @TYPES[key.replace(/read|[BL]E/g, '')]
this::[key] = ->
ret = @buffer[key](@pos)
@pos += bytes
return ret
readString: (length, encoding = 'ascii') ->
switch encoding
when 'utf16le', 'ucs2', 'utf8', 'ascii'
return @buffer.toString(encoding, @pos, @pos += length)
when 'utf16be'
buf = new Buffer(@readBuffer(length))
# swap the bytes
for i in [0...buf.length - 1] by 2
byte = buf[i]
buf[i] = buf[i + 1]
buf[i + 1] = byte
return buf.toString('utf16le')
else
buf = @readBuffer length
if iconv
try
return iconv.decode(buf, encoding)
return buf
readBuffer: (length) ->
return @buffer.slice(@pos, @pos += length)
readUInt24BE: ->
return (@readUInt16BE() << 8) + @readUInt8()
readUInt24LE: ->
return @readUInt16LE() + (@readUInt8() << 16)
readInt24BE: ->
return (@readInt16BE() << 8) + @readUInt8()
readInt24LE: ->
return @readUInt16LE() + (@readInt8() << 16)
module.exports = DecodeStream