Changelog for lfinput.fs and lfinput-test.fs.

Unattributed changes are by the initial author, David N.
Williams.  The revision dates in the source files may be more
recent than the most recent date here, when only cosmetic
changes have been made.

Version 0.5.6
13Sep06 * Added S-LFINPUT-AFTER.  Untested.
14Sep06 * Added FILE-STACK-DEPTH, FILE-SP0!.  Untested.
	* Added EMPTY-LFINPUT.  Untested.
19Sep06 * Added REWIND-LFINPUT.  Fixed bug in EMPTY-LFINPUT and
	  tested both by successful use in an application.
 4Aug10 * Added missing DROP after LFREFILL in lfinput-test.fs.
21Aug21 * Renamed PFE as USE-PFE-PARSING in lfinput.fs.
	* Added USE-PFE-PARSING switch in lfinput-test.fs.

Version 0.5.5
24Aug06 * Adjusted for new parsing-strings.fs and
	  parsing-input.fs, 0.5.0, except the pfe version with
	  new names isn't ready yet.
25Aug06 * Renamed:
	  PARSE-LFIN	  as LFPARSE
	  EXHAUST-LFIN	  as EMPTY-LFPARSE-AREA
	  PARSE-LFIN-WORD as LFPARSE-NAME
	  NEXT-LFIN-WORD  as NEXT-LFINPUT-NAME
	  REFILL-LFIN	  as LFREFILL
	  LFBIN		  as LFPOS
27Aug06 * Fixed to include parsing.fs instead of
	  parsing-strings.fs

Version 0.5.4
 9Aug06 * Grouped file-stack words with save/restore words, all
	  to be compiled when MAX-FILE-DEPTH is greater than
	  one.  Modified lfinput-test.fs accordingly.

Version 0.5.3
30Jul06 * Reverted from LFIN-SOURCE, LFIN-PARSE-AREA@,
	  LFIN-PARSE-AREA! names to LFSOURCE, LFPARSE-AREA@,
	  LFPARSE-AREA!  Unfortunately, I can't avoid
	  name-flipping!  Did the same in lfinput-test.fs.
	* Restored LGPL.
	* Renamed the double cell file position LFBINPUT as
	  LFBIN.
	* Merged lfinput-pfe.fs into lfpinput.fs, with
	  conditional compilation.  Really too hard to maintain
	  two files.
	* Renamed FILE-SB as FILE-STACK.
31Jul06 * Conditional compilation for string extensions BL-SKIP,
	  BL-SCAN, SEPARATE, SAFTER, all of which are now in
	  parsing-ext.c.
 2Aug06 * Cleaned up lfinput-test.fs.

Version 0.5.2
17Dec04 * Added file stack words:
          MAX-FILE-DEPTH, FILE-SB, FILE-S0, FILE-SP,
          >FILE-STACK, FILE-STACK>, SAVE-LFIN, RESTORE-LFIN.
	* Started lfinput-test.fs
18Dec04 * Added LFBOL because it's awkward to track how many
          eols, if any, are read with a line.
        * Decided it's more straightforward for SAVE-LFIN to
          zero the lfib rather than to exhaust it.
        * Finished simple tests with lfinput-test.fs,
          lftest1.fs, lftest2.fs.
        * Renamed LFBOL as LFBINPUT, and made SAVE-LFIN update
          it to leave the lfinstream valid.
19Dec04 * Added a test to ensure that SAVE-LFIN ... RESTORE-LFIN
	  moves the file position to the beginning of the parse
	  area, which remains the same as before.
20Dec04 * Last revision to lfinput-test.fs.  We're not keeping
          old versions.

Version 0.5.1
14Dec04 * Extracted line-file stack words into lfinput-pfe.fs,
          leaving ANS only version in lfinput.fs.
        * Added string extensions that were C primitives in the
          pfe version:  BL-SKIP, BL-SCAN, SEPARATE, SAFTER,
          SFIRST-WORD, SPARSE-WORD.
        * Changed names LFSOURCE, LFPARSE-AREA@, LFPARSE-AREA!
          to LFIN-SOURCE, LFIN-PARSE-AREA@, LFIN-PARSE-AREA!.
        * Cleaned up PARSE-LFIN, added PARSE-LFIN-WORD,
          NEXT-LFIN-WORD.
        * Revised comments.
15Dec04 * Changed license from LGPL to UPDL.

Version 0.5.0
 6Oct04 * Start.  Puzzled by spec for READ-LINE.  Collected ANS
          Forth RFI and messages from c.l.f. thread "ANS
          READ-LINE question", from 7Jun99.
 7Oct04 * Understood the spec and verified that current pfe and
          Gforth obey it.  Implemented REFILL-LFIN, LFINS
          (line-file input stack), SAVE-LFIN, RESTORE-LFIN.  The
          stack currently requires our pfe xstacks module.
12Oct04 * Decided not to use READ-LINE's facility for line input
          of less than a line, because it interferes with the
          input stream analogy.
        * Added  LFSOURCE, LFPARSE-AREA@, LFPARSE-AREA!.  Also
          EXHAUST-LFIN commented out.
13Oct04 * Uncommented EXHAUST-LFIN, used in PARSE-LFIN.