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		       Revision History for MakeIndex

This is a reverse time-ordered history of changes to MakeIndex.

-----------------------------------------------------------------
[19-Oct-1991]
	Merged in small set of changes into mkind.c and mkind.h for
	IBM VM/CMS support.  Since there are no operational changes,
	and 2.11 has only been distributed to the beta test list,
	I'm leaving the version number at 2.11, and advancing the date.

[11-Sep-1991]
	Version 2.11 released by Nelson H.F. Beebe <beebe@math.utah.edu>

	This version incorporates feedback from test sites for 2.10,
	and importantly, replaces memory-gobbling fixed strings in the
	index entries with dynamically-allocated strings, reducing the
	storage per entry from 1844 bytes to 80 bytes + actual string
	lengths.  For details, see the new NOTES file.  The use of
	dynamic strings now lets MakeIndex 2.11 process all of the
	entries in test/b209f.idx; with MakeIndex 2.10 and earlier, 6
	were rejected because of long fields.

	Reorder two lines in doc/makeindex.l to avoid single quote at
	beginning of line, which nroff and troff then lose.

	Move typeout of version string in mkind.c to before parsing of
	style file; otherwise, MakeIndex can terminate with an error
	message before identifying itself.

	Correct argument parsing in mkind.c to check for a following
	argument before assuming it is there.

	Change long macro PUT_HEADER in genind.h to function
	put_header() in genind.c; it was too long for some compilers.

	Correct bad args to STY_ERROR2() in scanst.c (had LINE_MAX
	instead of LINEMAX).

	Correct array dimension in flush_line() in genind.c from
	tmp[LINE_MAX] to tmp[sizeof(buff)]; long index entries
	otherwise overwrote stack storage.

	Correct array dimension in mkind.c from pageno[STRING_MAX] to
	pageno[NUMBER_MAX].

	Correct array dimension in scanid.c from keyword[STRING_MAX]
	to keyword[ARRAY_MAX].

	Correct two array dimensions in genind.c from 2*STRING_MAX to
	2*ARGUMENT_MAX.

	Document array sizes xxx_MAX in mkind.h (note above corrections).

	Add more code in scanid.c to check for overflow of field[].  A
	case was found where overwriting occurred if an idx_escape is
	found when i == ARRAY_MAX - 1.  In this new version, the length
	is no longer ARRAY_MAX, but is passed as an additional argument
	to the function scan_field().

	In sortid.c, change type of idx_gc from `int' to `long' to avoid
	integer overflow or wraparound when there are more than 32767
	(or whatever the host INT_MAX value is) comparisons.

	Change two tests in scanid.c in scan_roman_lower() and
	scan_roman_upper() from "if (... && (new = ...))" to
	"if (... & ((new = ...) != 0))" to suppress compiler warnings on
	some systems about possible error in use of = instead of ==.

	Add test/b211a.idx to test MakeIndex with very long
	index fields near, at, and beyond the standard internal array
	dimensions.

	Add test/b211b.{idx,ist} to test MakeIndex with the German
	sort option.

	Add missing "level = i;" in genind.c; this fixes an obscure bug
	that is seen only when certain style files are used.  The
	test/b211b.idx file tests the fix.

	Lattice has gone out of business, so the files src/make-lc.bat
	and src/makefile.lc are in some sense obsolete, and will receive
	no further maintenance.  They are retained in the distribution
	for now because some sites may still be using that compiler.

	Revise scanid.c to permit idx_quote (by default, a quotation
	mark) to quote ANY input character in the first argument to
	the indexentry macro.  Revise sortid.c to use unsigned char
	data for sorting, removing architecture dependence.  This also
	requires a change in the TOLOWER and TOUPPER macros in mkind.h.
	This is an important extension to MakeIndex: it permits sort
	keys to be created for all ASCII characters, including braces
	and others that otherwise have significance to MakeIndex (by
	default, @, |, !).  It also permits the user to get characters
	1..255 into the actual field; this will be important for TeX
	3.0 which can support a 256-character set.  Character 0 cannot
	be easily supported, because it is a string terminator in C,
	the language in which MakeIndex is currently implemented.  A
	future extension might support an escape mechanism for it.
	Too bad MakeIndex was not originally designed to support
	C-like \ooo (octal) and \xhh (hexadecimal) escape sequences!
	The file test/b211e.idx tests the sorting and display of all
	characters in 1..255, and the file test/b211e.ltx typesets the
	test index.  Because Ctl-Z is an end-of-file marker in PC DOS
	text files, test/b211h.idx is derived from test/b211e.idx by
	removing the line with that character, and used in dosdiff.bat
	in place of b211e.  Note that MakeIndex collates space and the
	characters in 1..31 and 127..255 somewhat differently than
	ASCII.  The MakeIndex order is:

		punctuation characters (in ASCII order),
		digits,
		control characters (1..31),
		space (32),
		letters (ignoring case),
		characters 127 .. 255.

	In prepare_idx() in mkind.c, add a check for a NULL `head';
	this can arise if the input file is garbage (e.g. you type
	makeindex foo, meaning foo.idx, but a foo file already exists,
	and is used instead of foo.idx).  Without this check, a NULL
	pointer is subsequently dereferenced, with core dumps on some
	machines.  The problem really lies in process_index() in
	mkind.c, where idx_tc gets incremented before we know we have
	a valid entry, such that in main(), idx_gt gets set to 1, when
	`head' is still NULL.  It seems easier to catch this error in
	prepare_idx() instead of process_index().

	Add additional architecture-specific targets to Makefile
	to incorporate the compiler switches shown under the 2.10
	LOG file entry below.

	The book.idx file is still too big for a Turbo C 2.0 compiled
	version of MakeIndex 2.11 on MS DOS to handle.

	Fix several loops that called GET_CHAR() without checking
	for an EOF result (genind.c, mkind.c, mkind.h, scanid.c,
	scanst.h).

	Fix range handling error in compare_page() in sortid.c; the file
	test/b211f.idx tests that the fix is correct.

	Incorporate bug repairs from:

		Eberhard Mattes <mattes@azu.informatik.uni-stuttgart.de>

		Mark James <mark@bdblues.altair.fr>, <mark@nuri.inria.fr>

-----------------------------------------------------------------
[05-Jul-1991]
	Version 2.10 released by Nelson H.F. Beebe <beebe@math.utah.edu>

	Testing of this version has been carried out on these systems:

		===================================	=================
		System					Compile Defines
		===================================	=================
		Apollo DN/10000				-DOS_SYSV -U__STDC__
		DECstation Ultrix 4.2
		HP 375 (4.3BSD)
		HP 9000/720 (HP-UX, System V UNIX)	-DOS_SYSV
		HP 9000/850S (HP-UX, System V UNIX)	-DOS_SYSV
		IBM 3090/600S-VF AIX			-D_BSD
		IBM PC DOS
		IBM RS/6000 AIX 3.1
		NeXT Mach
		Silicon Graphics 4D-240			-DOS_SYSV
		Stardent 1520 UNIX Release 2.2
		SunOS 4.1.1 (BSD UNIX)
		VAX VMS 5.3
		===================================	=================

	This version addresses all outstanding bug reports that I am
	aware of, and brings the code completely up to the level of
	Standard C (ANSI X3.159-1989 Programming Language--C, ISO C
	1990).

	In test/, rename long filenames to shorter ones, and add
	several new test files, and a Makefile to automate the testing
	of a new version on UNIX.

	Add a README file with compilation instructions.

	In mkind.c, mkind.h, and scanst.c, rename LONG_MAX to
	ARRAY_MAX.  LONG_MAX is used in Standard C for the largest
	long integer.

	In mkind.h, drop IBM_PC_LATTICE.  There were no uses of it
	elsewhere in the code, and Lattice is no longer in business, and
	Microsoft C and Turbo C are now the major compilers on PC DOS
	(Waterloo and TopSpeed lag far behind).  Existing support for
	TOPS-20 will be retained for now, even though by the end of
	1991, there may not be any more TOPS-20 systems alive; ours was
	retired 31-Oct-1990, and the American Mathematical Society's on
	31-Mar-1991.

	In mkind.h, except in OS_PCDOS, increase STRING_MAX from 128 to
	256, and in genind.c, change dimensions of 2*LINE_MAX to
	2*STRING_MAX.  Anita Hoover <anita@brahms.udel.edu> reported a
	need for this.

	Fix sort bug reported by Andreas Brosig <brosig@gmdzi.gmd.de>
	and Ed Sznyter <ews@Pescadero.Stanford.EDU>.  This bug was
	introduced in sortid.c at version 2.8 by the fix for another
	bug.  The code in compare_page() did not handle the case where
	two entries were the same in index fields and page numbers, but
	differed in their encap fields.  The resulting incorrect
	comparison could then later cause bogus page ranges to be
	produced.  Test file b209e.idx has been included for future
	testing.  From version 2.10, bugs reported in version x.yy will
	have files test/bxyy*.idx (* = a, b, ...) that will be preserved
	for regression testing.

	In doc/, in the manual page file, makeindex.l, alphabetize
	command-line switch descriptions, correct some spelling errors,
	and add new descriptions.  Add a Makefile and targets to
	automatically create the .dvi, .hlp, .info, .ps, and .vms files,
	and to install and uninstall the manual pages.  The .hlp, .info,
	.ps, and .vms files will be included with the distribution since
	they can be generated only on some UNIX systems.

	In paper/, add a Makefile, and create LaTeX picture mode
	equivalent of fig1.ps, so that ind.tex can be formatted and
	printed at any TeX installation. Remove the old output
	PostScript file, ind.ps, saving 300KB of disk space, since it is
	no longer needed.

	Incorporate additional contributions from:

		Johannes Braams <braams@hlsdnl5.bitnet> (bug fixes for
		VAX VMS)

		Joachim Schrod <xitijsch@ddathd21.bitnet> (2.9.1
		changes)

		Rainer Schoepf <bk4@dhdurz1.bitnet> (more Atari TOS
		changes)

		Eberhard Mattes <mattes@azu.informatik.uni-stuttgart.de>
		(OS/2 Makefile and .def description file)

		Richard P. C. Rodgers <rodgers@maxwell.mmwb.ucsf.edu>
		(manual page additions)

------------------------------------------------------------------------
[22-Jun-1990]
	Version 2.9.1 by Joachim Schrod <xitijsch@ddathd21.bitnet>

	Testing carried out on:
		PC DOS          Microsoft C 5.1
		BSD             Sun OS 4.0 cc
				gcc 1.37.1
		System V R3     MUNIX cc
				IBM AIX/2 cc
				IBM AIX/370 cc

	Added difference between BSD (OS_BSD) and System V R3 (OS_SYSV).
	Deleted UNIX (OS_UNIX).

	There doesn't exist a single `UNIX' system, e.g. the naming of
	index/rindex versus strchr/strrchr may be called a `cultural
	difference'.

	Updated comments concerning the preprocessor constants to reflect
	the actual state of the source.

	Please note that the Atari port seems to be incorrect; look for
	FIXME in mkind.h.

	By the way, it is not mentioned what compiler is used on the
	Atari -- it is one that uses index/rindex.

-----------------------------------------------------------------
[12-Dec-1989]
	Version 2.9 released by Nelson H.F. Beebe <beebe@math.utah.edu>

	Testing carried out on:
		PC DOS		Microsoft C 5.0, Turbo C 2.0, Lattice C 6.02
		TOPS-20		KCC-20 and PCC-20
		UNIX		Sun OS 4.0.3 cc and gcc 1.36
		VAX ULTRIX-32	cc
		VAX VMS		VMS C 2.3

	Added support for Turbo C 2.0 and Lattice C 6.02 on IBM PC DOS.

	Although compilation and linking were successful with Lattice
	C, the executable produced a 'Not enough core...abort' message
	at run time under the D, L, and H memory models.  Replacing
	malloc(n) calls by halloc(1L,n) did not remove the problem;
	debugging statements (selected by defining DEBUG at compile
	time) showed that calls to malloc() and calloc() allocated
	less than 15KB before the abort.  Curiously, a separate little
	test program that allocated 1000-byte blocks with malloc() or
	calloc() could allocate over 55KB in the small memory model,
	and over 500KB in the large models, before aborting.  Thus, we
	conclude for now that Lattice C 6.02 is not usable for
	MakeIndex.

	Added ARGS macro to simplify function declarations in ANSI and
	pre-ANSI styles.

	Added missing definition of OS_XENIX in mkind.h.

	Moved declarations of static functions from mkind.h to relevant
	*.c files to remove compiler warnings about declared, but unused,
	objects.

	Removed a couple of unreachable break statements that raised
	compiler warnings.

	Use ANSI strchr/strrchr instead of K&R index/rindex; the former
	are #defined to the latter for systems that have only the old
	names.

	Fixed scan_arabic() in scanid.c to allow ARABIC_MAX digits,
	instead of one less than that, and fix condition on which the
	error message about too many Arabic digits is triggered.

	Repair widespread confusion between NUL (the character '\0'),
	and NULL (the pointer).  NUL is a user-definable name, while
	NULL is defined by the implementation; on segmented memory
	machines, pointers and integers need not be equivalent, so it
	may hold that NULL != NUL.  Previous versions of MakeIndex used
	NULL to mean both, and redefined NULL to be '\0'.  In general,
	NULL must be typecast to a pointer of the appropriate type,
	since under ANSI C, it will usually be defined to be something
	like (void*)0 or (void*)0L.

-----------------------------------------------------------------
[11-Nov-1989]
	Version 2.8 released by Pehong Chen <chen@renoir.berkeley.edu>.
	(1) ARABic_MAX changed from 4 to 5, duo to Sebastian Rahtz's
	    <spqr%ecs.southampton.ac.uk@NSFnet-Relay.AC.UK> report
	    on TeXhax #87 (9/17/1989).
	(2) A nasty sorting bug was fixed due to a report from
	    Martha Wershofen-Mersbach <GRZTEX%dbngmd21.bitnet@NET.BIO.NET>
	    of the German National Research Center For Computer Science (GMD).
	(3) Siemens BS2000 ported done by Andreas Brosig of the German
	    National Research Center For Computer Science (GMD).
	(4) German word ordering, the "-g" option contributed by Brosig.
	(5) Miscellaneous bug fixes by Brosig:
	    A. Blank compression routine ("-c") fixed.
	    B. The "-p" option now works for MSDOS and MVS.  Have to open
	       logfile in binary mode for OS_PCDOS and add OS_MVSXA to an
	       existing #if because fseek(...) does not work under MVS.
	    C. If an indexentry contains more than 2 IDX_LEVEL '!' or more
	       than 3 IDX_ACTUAL '@', MakeIndex would ignore this entry
	       and writes "Extra ... at position ..." to the transcript file.
	       This is now fixed.
	    D. If an indexentry is too long (> STRING_MAX), MakeIndex would
	       ignore it and write a message to the transcript file.
	       This is now fixed.
	    E. For MSDOS(OS_PCDOS) LONG_MAX is set back to 144
	       and STRING_MAX to 64.  Otherwise a core error will occur
	       in the case of a big IDX-file.

-----------------------------------------------------------------
[1-Oct-1988]
	Version 2.7 released by Pehong Chen <chen@orc.olivetti.com>.
	(1) Fixed a string printing bug reported by anita@brahms.udel.edu
	    through Leslie Lamport.  The string should be an argument
	    to the printf format, instead of the format itself.

-----------------------------------------------------------------
[14-Jul-1988]
	Version 2.6 released by Pehong Chen <chen@orc.olivetti.com>.
	(1) The documentation for UNIX man page makeindex.l went through
	    revision by Rick P. C. Rodgers of UCSF <rodgers@cca.ucsf.edu>.
	    Rick also provided a sample style file for MakeIndex to work
	    with troff (see the man page for details).
	(2) String length (LONG_MAX) was increased from 144 to 1024.
	(3) Fixed a letter heading bug.  It used to put the heading
	    below the first index entry.
	(4) Added a new feature, the terminating delimiter for page list.
	    This delim_t string is null by default.  It can be redefined
	    as a period if one would like a page list to be terminated
	    by a period, for example.  This delimeter has no effect
	    on an index entry which does not have any page number
	    associated with it.

-----------------------------------------------------------------
[14-Apr-1988]
	Version 2.5 released by Pehong Chen <phc@berkeley.edu>,
	with VAX/VMS extensions by
	    Charles Karney
	    Plasma Physics Laboratory  Phone:   +1 609 243 2607
	    Princeton University       MFEnet:  Karney@PPC.MFEnet
	    PO Box 451                 ARPAnet: Karney%PPC.MFEnet@NMFECC.ARPA
	    Princeton, NJ 08543-0451   Bitnet:  Karney%PPC.MFEnet@ANLVMS.Bitnet
	The file VMSmake.com for VAX/VMS users who don't have make.
	This version also includes a fix under XENIX by
	    Baron O.A. Grey 		UCLA Computer Science Department
	    baron@CS.UCLA.EDU		...!(ucbvax,ihnp4)!ucla-cs!baron

-----------------------------------------------------------------
[20-Mar-1988]
	Version 2.4 released by Pehong Chen <phc@berkeley.edu>,
	the ``official'' version of MakeIndex that enters public domain.

	* length() (originally defined in mkind.c) is replaced by
	the standard function strlen(), which in some C implementations
	is, or can be, expanded to in-line efficient hardware instructions
	(e.g.  Microsoft C and VAX Unix); I have not yet done this.

-----------------------------------------------------------------
[20-Jan-1988]
	Portable version 2.3 released by Nelson H.F. Beebe
	<beebe@math.utah.edu>.

	I spent 3 days implementing MakeIndex on Sun OS3.3 Unix
	(cc and gcc), TOPS-20 (KCC-20 and PCC-20 compilers), PC
	DOS (Microsoft C Version 5.0), and VAX VMS.  This was at
	times a frustrating experience, because the effort
	revealed a great many portability problems in the
	original code (from VAX Unix, I think), plus some genuine
	bugs in MakeIndex, plus a bug in each of two compilers
	(KCC-20 and PCC-20)!

	The changes for this version over 2.2 are exclusively bug
	fixes and portability enhancements.  Thanks to the
	original authors' careful design, no functionality
	changes are likely to be necessary.

	Besides getting the code working correctly on 4 systems
	and 6 compilers, I have made several passes over the code
	to reduce the lint complaints to a minimum, and remove
	all of the warnings produced by the IBM PC Microsoft C
	Version 5.0 compiler, which is the only one of the above
	systems which completely implements October 1986 draft
	ANSI C; the ANSI function prototype checking caught
	numerous problems.

	With these changes, I believe that we now have a version
	of MakeIndex that satisfies the important goal of TeX --
	the same input will produce identical output results on
	all machines, whether they be micros, minis, mainframes,
	or supercomputers.  This is true at least for the 6
	systems for which testing has been possible at Utah.

	Here is a summary of bug corrections and other changes:

	* Several routines fell off the end without returning a
	value, when the caller expected it; this was particularly
	hard to trace (2 days of effort--the code only failed on
	PCC-20, and work correctly with the other 4).

	* Equivalence of *short and *int was incorrectly assumed
	in one routine; this made the code dependent on the byte
	storage order (it works on the little-Endian VAX
	architecture, but will fail on big-Endian architectures
	(IBM et al)).

	* Equivalence of *int and *char was incorrectly assumed
	in the call to qsort(); the only one of the 6 compilers
	which uses a different format for *char values is KCC-20,
	and that feature caught this bug (the compiler didn't
	find it for me, but when the sort failed, I tracked it down).

	* Routines which do not return a value are now explicitly
	typed `void' instead of nothing or `int', and mkind.h has
	both K&R old-style and new ANSI style function
	declarations for all routines; the choice is made on the
	basis of the compiler and operating-system switch
	selections.

	* A single (incorrect) use of backslash-dot (\.) escape
	sequence in scanid.h has been reduced to dot (.).

	* exit() was called without a valid argument in mkind.h.

	* In several places, code of the form
		char c;
		while ((c = getchar()) != EOF)
	existed; this is incorrect and will fail on many machines
	when the EOF (== -1) value returned by getchar() is
	truncated to a byte value for storage in c, then extended
	to an integer again and compared with EOF.  The correct
	approach is to use "int c;" instead of "char c;".  Type
	declarations have been changed from "short" or "int" to
	"char" or vice versa in several places in order to
	achieve consistency, and explicit typecasts are used when
	data types are intentionally changed by assignment or
	argument association.

	* mkind.h now has a SHORTNAMES section to define short
	names for the 45 long ones which clash when reduced to 6
	characters (although KCC-20 and PCC-20 both handle long
	names, they produce assembly code output, and the
	assembler limits names to 6 case-insensitive chars).

	* File names have been reduced to 6 characters, allowing
	the source to be ported to all of the above systems
	without tedious file renaming.  The TOPS-20 LINK program
	also runs under TOPS-10, and because TOPS-10 has a
	6-character file name limit, LINK-20 does too, sigh...
	The executable is called makeindex on all systems except
	PC DOS, where the 8-character limit reduces it to
	makeindx.  Similarly, filenames with special characters
	(ind+ and ind-) have been renamed to portable names.

	* Reference to sys/file.h has been eliminated; it was
	only needed for the symbol R_OK passed to access().
	sys/file.h is missing from most non-Unix C
	implementations, while the value of R_OK (4) for access()
	is consistent for all but PCC-20, where only F_OK (0) is
	implemented.

	* Makefiles have been produced for each of the above
	systems (I have the same version of a public-domain make
	running on all of them).

	* A public version of qsort.c has been included in
	MakeIndex for two reasons.  First, some non-Unix C
	implementations lack it.  Second, quicksort is not a
	`stable' sorting algorithm; that is, the order of items
	with equal keys is not necessarily identical between the
	input and the output.  Different implementations of the
	sort algorithm in the host qsort() can therefore give
	different ordering in such cases (PCC-20 and KCC-20
	differed, which is how I caught this).  qsort is
	#define'd to qqsort for all systems, in order to avoid
	possible clashes with the standard library version (this
	happens with IBM PC Microsoft C and with VAX VMS).

	* Version 2.2 did not come with any documents containing
	index entries to test MakeIndex with.  I have taken the
	liberty of preparing an index for Leslie Lamport's
	article, ../doc/makeindex.tex for a test version,
	../test/test.tex.   This can be used both to test MakeIndex,
	as well as to illustrate the production of an index for
	new users (I'm using it in a class that I am teaching on
	LaTeX).  test.tex uses the showidx document style option
	to get the index entries displayed as marginal notes, and
	the index entries in test.tex have been carefully
	formatted  to always begin a line; that way, they can be
	easily extracted (e.g. by grep), so that one can see the
	original entries, the LaTeX output .idx file, and the
	MakeIndex output .ind file.

	* The bug fix for PCC-20 has been posted to the TOPS-20
	bulletin board; PCC-20 was developed at CS.UTAH.EDU, but
	we (SCIENCE.UTAH.EDU) now have their DEC-20, so I guess
	we have become the default PCC bug-fix site.  The bug in
	KCC-20's preprocessor has been reported to the KCC
	developers at SRI-NIC.ARPA but cannot be easily fixed
	until the draft ANSI C support in KCC-20 is complete; in
	the meantime, conditional compilation is used to provide
	alternate code which compiles correctly.

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[29-May-1987]
	Version 2.2 (5/29/1987) released by Pehong Chen <phc@berkeley.edu>.

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