Class: XDRScanner (in SunRPC)

• Inheritance
• Description
• Class protocol
  • initialization
• Instance protocol
  • accessing
  • initialization
  • private
  • reading next token
  • specials

Inheritance:

   Object
   |
   +--Scanner
      |
      +--SunRPC::XDRScanner

Package:

stx:goodies/communication

Category:

Net-Communication-SunRPC-XDR_IDL

Version:

rev: 1.12 date: 2017/11/18 09:52:03

user: cg

file: SunRPC_XDRScanner.st directory: goodies/communication

module: stx stc-classLibrary: communication

Author:

Claus Gittinger

Description:

scanner for XDR-definition files - provides token scanning functionality
for the XDRParser. (normally not used by its own).
XDR is the IDL of SunRPC.

Class protocol:

 initialize

(comment from inherited method)
initialize the classes defaults. Typically, these are changed
later in the 'private.rc' file.

 setupActions

initialize the scanners actionTables - these are used to dispatch
into scanner methods as characters are read

usage example(s):

XDRScanner setupActions

 update: something with: parameter from: changedObject

bug work-around (compiled cheap blocks loose their code)

Instance protocol:

 newSource: aStringOrStream

 source

 initialize

initialize the scanner

 checkForKeyword: string

check if string is a keyword (as opposed to an identifier).

 isCommentCharacter: ch

return true, if ch is the comment-start character

 pushBack: aToken

 skipForClosing: closingToken with: openingToken

 nextCharacter

a single quote has been scanned; scan the character-string (caring for quotes).
TODO: C-escapes; \0xx; \0xxx

 nextEq

'=' has been read - look for another '='

 nextGT

'>' has been read - look for another '>'

 nextLT

'<' has been read - look for another '<'

 nextMinus

'-' has been read - look for another '-'

 nextNumber

a digit has been read; scan a number (0xfoo / 0octal / decimal or float).
if specialFloat is true, return float value as hi.low (for version numbers)

 nextPlus

'+' has been read - look for another '+'

 nextSlash

'/' has been read - next could be:
'/' - EOL comment
'*' - regular comment

 nextString

a doubled quote has been scanned; scan the string (caring for doubled quotes

 nextToken

return the next token from my source-stream

 readingStream: aStream do: aBlock

 restOfLine