!Wednesday, 02/28/79 14:30:47
*Dan
$rf
#Syntax to allow continuation of quoted literals
#     "continued literal_
#        "rest of literal"
#
#Changed  profile  mechanism  to  generate  executable  subroutine
#t$init instead of block data.
!Wednesday, 02/28/79 14:32:55
*Dan
$history.sh
#Addition of 'history' command.
!Thursday, 03/01/79 11:49:10
*Perry
$publish.r
#Added name of author to news index.  Truncated seconds from  time
#stamp in news index.
!Sunday, 03/04/79 15:25:44
*Dan
$ld
#Added -g option and a symbol definition for KP$LS.
!Sunday, 03/04/79 15:30:57
*Dan
$sh, getarg, ld
#Changed argument handling:
#   - 'Getarg'  extract  arguments  directly  from  shell's linked
#     string space.  Pointers are placed in the  common  block  in
#     argv  and  the first 32 words of buf.  Argument 0 is now ac-
#     cessible through 'getarg'.  Argc is 1 when no arguments  are
#     specified.
#   - 'Sh' now copies argument points into argv.  Buf is not used.
#   - 'Ld'  includes  the  symbol  definition  for  kp$ls  so that
#     programs using  'getarg'  from  the  unshared  library  will
#     correctly access the linked string space.
!Sunday, 03/04/79 15:32:14
*Dan
$sh
#The  search  rule mechanism now replaces the metacharacter "&" in
#the search rule elements with  the  search  target,  rather  than
#unconditionally appending the search target.
!Sunday, 03/04/79 18:45:06
*Dan
$ld
#Added -e option to specify default segment number.
!Sunday, 03/04/79 19:08:06
*Dan
$sh
#Fixed  'getnet':   did  not  set function value if it did not see
#EOF.
!Sunday, 03/04/79 21:52:43
*Dan
$term_type, e
#Added 'term_type' shell function  to  print  out  'se'-compatible
#terminal type.
!Sunday, 03/04/79 21:54:11
*Dan
$sh
#Fixed  bug  in  the  initialization of std_port_tbl in the common
#areas which resulted in the erroneous redirection  of  the  first
#function in a command line immediately following a pipe.
!Sunday, 03/04/79 21:55:44
*Dan
$ld, vswtlb, nvswtlb, sswtlb
#Changed default shared library name to 'vswtlb', default unshared
#library name to 'nvswtlb'.  'Sswtlb' will no longer be supported.
!Thursday, 03/15/79 20:09:40
*Dan
$rf.r
#Added  code to detect declarations at other than level 1 of nest-
#ing and print an error message.  Message indicates missing  brace
#or paren in last routine.
!Monday, 03/19/79 12:19:16
*Allen
$stacc
#Added    'stacc'    to    /bin,    stacc.r   and   stacc.com   to
#/swtsrc/cmn_progs.
!Friday, 03/30/79 14:31:33
*Paul
$mail, to
#An updated version of the function  'vfyusr'  (which  checks  the
#validity  of  a  login name) was added.  The new version searches
#/extra/users for the name instead  of  searching  /system/passwd,
#since the latter file may not exist at all installations.  'Mail'
#and 'to' have been recompiled with the new routine.
!Friday, 03/30/79 14:39:02
*Paul
$swtlib
#Added 'vfyusr' to the standard SWT library.
!Friday, 04/13/79 18:06:00
*Perry
$All
#Version  6  of Software Tools Subsystem frozen; distribution tape
#created.
!Thursday, 04/19/79 19:05:15
*Perry
$fixdot
#Changed "badusage" label to conform to new label syntax.
!Friday, 04/20/79 10:36:35
*Perry
$dnum
#'Dnum' command added to generate and  interpret  Primos  physical
#disk numbers.  Source code added to /swtsrc/std_progs.
!Tuesday, 04/24/79 09:18:21
*Perry
$swt
#Fixed the bug that prevented 'swt' from creating a .vars file for
#a new user.  Rewrote the subroutine that prompts the user for his
#Subsystem  password (non-Ga.  Tech installations only) so that it
#preserves the terminal configuration word.
!Friday, 04/27/79 11:34:42
*Allen
$hp
#Resurrected 'hp' by using 'stacc' to  produce  a  quick-and-dirty
#version.   Arithmetic,  logical, and stack print/delete operators
#included, but looping and conditional  operators  omitted.   'Hp'
#installed in /bin and news article published.
!Friday, 04/27/79 11:38:10
*Tom
$shell
#'Save' internal command added to force level 1 shell variables to
#be written to the .vars file.
!Tuesday, 05/01/79 19:31:02
*Perry
$se
#Bugs fixed:
#   - All problems associated with improper updating of the screen
#     after it has been split.
#   - Improper  updating  of  the screen when changing line 1 of a
#     file less than one screenful long.
#   - Substitution of the last line in the file  for  the  current
#     line when garbage collection occurs during a 's' or 't' com-
#     mand.
#     
#New features:
#   - Arbitrary tab stops.
#   - Inline character scans.
#   - Ability to enter ASCII control characters using the ESC key.
#   - Inline appends, changes and insertions.
#   - Global appends, changes and insertions.
!Saturday, 05/12/79 19:51:37
*Perry
$se
#Fixed  the  bug that caused 'se' to go into an infinite loop when
#using the inline character  scan  control  characters.   Added  a
#feature  to save the last character scanned for; if the same scan
#control character is hit twice in a row, the last character scan-
#ned for is used for the scan.  Modified append mode  to  position
#the  window  more intelligently when the text being entered wraps
#from the bottom row to the top row.  Reinstated clearing  of  the
#row  below  the  command  row in append mode.  Fixed the bug that
#caused the current line to be incorrect after doing an  "e"  com-
#mand on a non-existent or unreadable file.
!Saturday, 05/12/79 23:22:37
*Perry
$getkwd
#Rewritten for new argument handling protocols.  Now uses 'getarg'
#to fetch arguments instead of accessing them directly from a com-
#mon block.
!Monday, 05/14/79 09:53:54
*Perry
$punch, typo, sw$in, sw$out
#The  'punch'  and 'typo' commands have been removed from the Sub-
#system, as have the library routines 'sw$in' and 'sw$out'.
!Friday, 05/18/79 10:50:03
*Perry
$open.r
#Fixed 'open' so that it attempts to allocate an i/o buffer before
#it attempts to open the file.  If no buffer space  is  available,
#the  file  is  not  opened.   The  fact  that  it performed these
#operations in the reverse order  was  the  reason  that  'mktemp'
#would  occasionally  create 99 temporary files in /temp and still
#return an error.
#
#This change is to source code only; the library has not yet  been
#recompiled.
!Friday, 05/18/79 11:02:08
*Perry
$mt
#'Mt' command for handling unlabeled magnetic tapes added to /bin.
#Source code added to /swtsrc/cmn_progs, manual entry written, and
#news article published.
!Friday, 05/18/79 11:41:04
*Paul
$file
#'File'  command  to  check  on attributes of files added to /bin.
#Reference manual entry added  to  online  documentation.   Source
#code placed in /swtsrc/std_progs.
!Friday, 05/18/79 14:05:57
*Perry
$fcopy
#The  subroutine  'fcopy'  has  been modified to do a fast, binary
#file copy when the input and output files are both disk files.
!Wednesday, 06/13/79 15:20:01
*Allen
$swtlib
#Added six routines for simple symbol table  management:   mktabl,
#rmtabl, lookup, enter, delete, and st$lu.
!Thursday, 06/21/79 14:33:13
*Allen
$stacc
#Installed first production version of 'stacc' in /bin.
#
#Changes from bootstrap version include:
#
#   - Rewriting of parser portion in 'stacc'.
#   - Addition of simple error recovery code.
#   - Rewriting of output routines to provide indented output code
#     and elimination of unused 'case' alternatives.
#   - Introduction  of  the  equals  sign (=) into terminal symbol
#     declarations, allowing two terminals to  be  interchangeable
#     (have the same lexical representation).
#   - Introduction of the "no advance" construct (a period after a
#     terminal  symbol)  which  prevents the automatic call to the
#     lexical analyzer after matching a terminal symbol.
#   - Change of the "action" character from sharp (#) to bang (!).
#   - Introduction of Ratfor-style comments, preceded by  a  sharp
#     sign (#) and continuing to the end of the line on which they
#     appear.
#   - Single  characters  enclosed  in single or double quotes may
#     now be used as terminal symbols.   They  are  replaced  with
#     their  Prime  ASCII  values,  and  so may be matched against
#     characters returned by Subsystem I/O routines.
#   - Terminal symbol definitions are output to standard output  2
#     rather than standard output 1.
#   - Definitions  for  the  three  parser  states  are now output
#     automatically.
#
#Reference manual entry updated.
!Thursday, 06/21/79 16:20:51
*Allen
$swtsrc
#Created  /swtsrc/stacc_progs  to  hold  Subsystem  programs  that
#require 'stacc' to be rebuilt.  Proper modifications were made to
#the  build_procedures.  /swtsrc/special_progs/hp.u was destroyed,
#since 'hp' now is properly assigned to stacc_progs.
#
#Conventions for programs in stacc_progs:
#
#   - The Ratfor code for a program using a 'stacc' parser  is  in
#     the file "program.r"
#   - The   'stacc'   code   for   the   parser  is  in  the  file
#     "program.stacc"
#   - The output  of  'stacc'  will  be  directed  to  two  files,
#     "program.stacc.r"  and "program.stacc.defs", which should be
#     'include'd in the Ratfor code as necessary.
#   - Any common block include files needed by the program  should
#     be in "program.com"
!Friday, 06/22/79 14:48:11
*Perry
$hd
#Changed  default  mfd password to "XXXXXX" for compatibility with
#unmodified Primos systems.
!Tuesday, 07/17/79 09:07:54
*Perry
$apl
#Added Ren Frame's APL interpreter to the Subsystem.  Source  code
#placed  in  '/swtsrc/special_progs/apl.u',  binary in '/bin/apl';
#all applicable build_procedures updated.  Reference manual  entry
#not yet available -- in preparation from Ren's thesis.  Installa-
#tion not yet announced in news.
!Monday, 07/30/79 15:30:09
*Dan
$os
#Corrected  bug  that  cause  a blank page to appear when the 66th
#line on a page was not blank.  'Os' should not  generate  a  page
#eject when the paper is positioned to the first line of a page.
!Monday, 07/30/79 21:22:01
*Dan
$swt
#Fixed  password  handling  (again) to work properly on unmodified
#Primos.  The array 'passwd' in the profile is now set to  EOS  if
#no password is specified.
!Monday, 07/30/79 21:24:36
*Dan
$getvdn
#New  subroutine.   This  subprogram  takes a file name as one ar-
#gument and returns the full path  name  (including  password)  of
#that file in a user's variables directory.
!Monday, 07/30/79 21:27:12
*Dan
$fmt
#Modified  'fmt' so that it doesn't die whan a margin greater than
#MAXLINE - 3 is requested.  Incidentally, 'mktl' will make a title
#as large as (right margin value) + 2 without checking.
!Tuesday, 07/31/79 12:33:05
*Dan
$term
#Modified to take ASCII mnemonics for  erase  and  kill  character
#settings.
!Thursday, 08/02/79 13:57:50
*Allen
$fmt
#Changed  linear  searches  used in formatter for looking up func-
#tions and commands to  calls  on  symbol  table  routines.   Also
#replaced  "if...else  if...else  if" chains with case statements.
#Measured 11% reduction in CPU time for  new  version.   Installed
#new version, wrote news article.
!Thursday, 08/02/79 17:38:29
*Allen
$rf
#Removed  Jack's  strange  hashing  algorithm  from  the  'define'
#processor in Ratfor, replaced it with calls to the  symbol  table
#routines.   Also  used  symbol  table routines to effect key word
#lookup in 'lex'.  Measured performance improvements ranging  from
#2% to 15%; improvement seems to be greatest in small programs.
!Sunday, 08/05/79 12:26:07
*Allen
$se
#Rearranged  subroutines  in  'se'  in  hopes of providing greater
#locality of reference.
#
#Technique used:  compiled 'se' with profile option, then profiled
#several editing sessions consisting only of one editing operation
#(e.g.  file reading,  file  writing,  appending,  global  search,
#etc.).   Then  clustered  those routines with highest call counts
#for each operation.
#
#Source directory "/swtsrc/special_progs/se.u" was also rearranged
#somewhat, in particular each subprogram was placed in a  separate
#file in the subdirectory "source".
!Wednesday, 08/08/79 14:32:35
*Perry
$fmt
#Fixed  'options'  procedure  to  eliminate infinite loop when "-"
#specified as first file name.  Any unrecognized options  are  now
#treated as file names.
!Wednesday, 08/08/79 18:10:56
*Perry 
$getarg
#Made getarg honor the third (length) parameter passed to it which
#it previously did not do.
!Wednesday, 08/08/79 18:15:19
*Allen
$fmt
#Made  several  modifications  to  'fmt'  to increase speed.  Most
#notable include replacing calls to 'putch' with calls to 'putlin'
#and  serializing  some  complex   conditionals.    Achieved   ap-
#proximately 30% improvement in speed.
!Thursday, 08/09/79 15:16:10
*Dan
$fcopy
#Replaced  "fast"  version with old version because the former did
#not take into account the state of the Subsystem I/O buffers.
!Thursday, 08/09/79 15:31:21
*Dan
$all
#Software Tools Subsystem Version 6 Release Tape made.
