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+                   Log of Changes Made to CFITSIO
+
+
+Version 2.501 - 2 December 2004
+
+  New Routines:
+  
+   - added fits_open_diskfile and fits_create_diskfile routines that simply
+     open or create a FITS file with a specified name.  CFITSIO does not
+     try to parse the name using the extended filename syntax.
+     
+   - 2 new C functions, CFITS2Unit and CUnit2FITS, were added to convert
+     between the C fitsfile pointer value and the Fortran unit number.
+     These functions may be useful in mixed language C and Fortran programs.   
+   
+  Enhancements:
+  
+   - added the ability to recognize and open a compressed FITS file
+     (compressed with gzip or unix compress) on the stdin standard input
+     stream.
+  
+   - Craig Markwardt (GSFC) provided 2 more lexical parser functions:
+     accum(x) and seqdiff(x) that compute the cummulative sum and the
+     sequential difference of the values of x.
+  
+   - modified putcole.c and putcold.c so that when writing arrays of
+     pixels to the FITS image or column that contain null values, and
+     there are also numerical overflows when converting some of the
+     non-null values to the FITS values, CFITSIO will now ignore the
+     overflow error until after all the data have been written. Previously,
+     in some circumstances CFITSIO would have simply stopped writing any
+     data after the first overflow error.     
+      
+   - modified fitsio2.h to try to eliminate compiler warning messages
+     on some platforms about the use of 'long long' constants when 
+     defining the value of LONGLONG_MAX (whether to use L or LL
+     suffix).
+
+   - modified region.c to support 'physical' regions in addition to
+     'image', 'fk4', etc.
+
+   - modified ffiurl (input filename parsing routine) to increase the 
+     maximum allowed extension number that can be specified from 9999 
+     to 99999 (e.g. 'myfile.fits+99999')
+
+  Bug Fixes:
+  
+   - added check to fits_create_template to force it to start with
+     the primary array in the template file, in case an extension
+     number was specified as part of the template FITS file name.
+      
+Version 2.500 - 28 & 30 July 2004
+
+  New Routine:  
+  
+   - fits_file_exists tests whether the specified input file, or a 
+     compressed version of the file, exists on disk.
+
+  Enhancements:
+
+   - modified the way CFITSIO reads and writes data in COMPLEX ('C') and
+     DBLCOMPLEX 'M' columns.  Now, in all cases, when referring to the
+     number of elements in the vector, or the value of the offset to a 
+     particular element within the vector, CFITSIO considers each pair of
+     numbers (the imaginary and real parts) as a single element instead of
+     treating each single number as an element. In particular, this changes
+     the behavior of fits_write_col_null when writing to complex columns.  
+     It also changes the length of the 'nullarray' vector in the
+     fits_read_colnull routine;  it is now only 1/2 as long as before.
+     Each element of the nullarray is set = 1 if either the real or 
+     imaginary parts of the corresponding complex value have a null
+     value.(this change was added to version 2.500 on 30 July).
+
+   - Craig Markwardt, at GSFC, provided a number of significant enhancements
+     to the CFITSIO lexical parser that is used to evaluate expressions:
+     
+       - the parser now can operate on bit columns ('X') in a similar
+         way as for other numeric columns (e.g., 'B' or 'I' columns)
+	 
+       - range checking has been implemented, so that the following 
+         conditions return a Null value, rather than returning an error:
+	 divide by zero, sqrt(negative),  arccos(>1), arcsin(>1),
+	 log(negative), log10(negative)
+	 
+       - new vector functions:  MEDIAN, AVERAGE, STDDEV, and 
+         NVALID (returns the number of non-null values in the vector)
+
+       - all the new functions (and SUM, MIN and MAX) ignore null values
+       
+   - modified the iterator to support variable-length array columns
+
+   - modified configure to support AIX systems that have flock in a non-
+     standard location.
+     
+   - modified configure to remove the -D_FILE_OFFSET_BITS flag when running
+     on Mac Darwin systems.  This caused conflicts with the Fortran
+     wrappers, and should only be needed in any case when using CFITSIO
+     to read/write FITS files greater than 2.1 GB in size.
+
+   - modified fitsio2.h to support compilers that define LONG_LONG_MAX.
+
+   - modified ffrsim (resize an existing image) so that it supports changing
+     the datatype to an unsigned integer image using the USHORT_IMG and
+     ULONG_IMG definitions.
+
+   - modified the disk file driver (drvrfile.c) so that if an output
+     file is specified when opening an ordinary file (e.g. with the syntax
+     'myfile.fits(outputfile.fits)' then it will make a copy of the file,
+     close the original file and open the copy.  Previously, the
+     specified output file would be ignored unless the file was compressed.
+
+   - modified f77_wrap.h and f77_wrap3.c to support the Fortran wrappers
+     on 64-bit AMD Opteron machines
+
+  Bug fixes:
+
+   - made small change to ffsrow in eval_f.c to avoid potential array 
+     bounds overflow.
+     
+   - made small change to group.c to fix problem where an 'int' was
+     incorrectly being cast to a 'long'.
+
+   - corrected a memory allocation error in the new fits_hdr2str routine
+     that was added in version 2.48
+
+   - The on-the-fly row-selection filtering would fail with a segfault
+     if the length of a table row (NAXIS1 value) was greater than
+     500000 bytes.  A small change to eval_f.c was required to fix this.
+
+Version 2.490 - 11 February 2004
+
+  Bug fixes:
+
+  - fixed a bug that was introduced in the previous release, which caused
+    the CFITSIO parser to no longer move to a named extension when opening
+    a FITS file, e.g., when opening myfile.fit[events] CFITSIO would just
+    open the primary array instead of moving to the EVENTS extension.
+
+  - new group.c file from the INTEGRAL Science Data Center.  It fixes
+    a problem when you attach a child to a parent and they are both
+    is the same file, but, that parent contains groups in other files.
+    In certain cases the attach would not happen because it seemed that
+    the new child was already in the parent group.
+
+  - fixed bug in fits_calculator_rng when performing a calculation
+    on a range of rows in a table, so that it does not reset the
+    value in all the other rows that are not in the range = 0.
+
+  - modified fits_write_chksum so that it updates the TFORMn 
+    keywords for any variable length vector table columns BEFORE 
+    calculating the CHECKSUM values.  Otherwise the CHECKSUM
+    value is invalidated when the HDU is subsequently closed.
+
+Version 2.480 - 28 January 2004
+
+  New Routines:
+
+  - fits_get_img_equivtype - just like fits_get_img_type, except in
+    the case of scaled integer images, it returns the 'equivalent' 
+    data type that is necessary to store the scaled data values.  
+
+  - fits_hdr2str copies all the header keywords in the current HDU
+    into a single long character string.  This is a convenient method
+    of passing the header information to other subroutines.
+    The user may exclude any specified keywords from the list.
+
+  Enhancements:
+
+  - modified the filename parser so that it accepts extension
+    names that begin with digits, as in 'myfile.fits[123TEST]'.
+    In this case CFITSIO will try to open the extension with
+    EXTNAME = '123TEST' instead of trying to move to the 123rd
+    extension in the file.
+
+  - the template keyword parser now preserves the comments on the
+    the mandatory FITS keywords if present, otherwise a standard
+    default comment is provided.
+
+  - modified the ftp driver file (drvrnet.c) to overcome a timeout
+    or hangup problem caused by some firewall software at the user's
+    end (Thanks to Bruce O'Neel for this fix).
+
+  - modified iraffits.c to incorporate Doug Mink's latest changes to
+    his wcstools library routines.  The biggest change is that now
+    the actual image dimensions, rather than the physically stored
+    dimensions, are used when converting an IRAF file to FITS.
+
+  Bug fixes:
+
+  - when writing to ASCII FITS tables, the 'elemnum' parameter was
+    supposed to be ignored if it did not have the default value of 1.
+    In some cases however setting elemnum to a value other than 1 
+    could cause the wrong number of rows to be produced in the output
+    table.
+
+  - If a cfitsio calculator expression was imported from a text file
+    (e.g. using the extended filename syntax 'file.fits[col @file.calc]')
+    and if any individual lines in that text file were greater than 
+    255 characters long, then a space character would be inserted
+    after the 255th character.  This could corrupt the line if the space
+    was inserted within a column name or keyword name token.
+
+Version 2.480beta  (used in the FTOOLS 5.3 release, 1 Nov 2003)
+
+  New Routines:
+
+  - fits_get_eqcoltype - just like fits_get_coltype, except in the
+    case of scaled integer columns, it returns the 'equivalent' 
+    data type that is necessary to store the scaled data values.  
+
+  - fits_split_names - splits an input string containing a comma or
+    space delimited list of names (typically file names or column
+    names) into individual name tokens.
+
+  Enhancements:
+
+  - changed fhist in histo.c so that it can make histograms of ASCII
+    table columns as well as binary table columns (as long as they
+    contain numeric data).
+
+  Bug fixes:
+
+  - removed an erroneous reference to listhead.c in makefile.vcc, that is
+    used to build the cfitsio dll under Windows.  This caused a 'main'
+    routine to be added to the library, which causes problems when linking
+    fortran programs to cfitsio under windows.
+
+  - if an error occurs when opening for a 2nd time (with ffopen) a file that
+    is already open (e.g., the specified extension doesn't exist), and
+    if the file had been modified before attempting to reopen it, then
+    the modified buffers may not get written to disk and the internal
+    state of the file may become corrupted.  ffclos was modified to
+    always set status=0 before calling ffflsh if the file has been 
+    concurrently opened more than once.
+
+Version 2.470 - 18 August 2003
+
+  Enhancements:
+
+  - defined 'TSBYTE' to represent the 'signed char' datatype (similar to
+    'TBYTE' that represents the 'unsigned char' datatype) and added
+    support for this datatype to all the routines that read or write
+    data to a FITS image or table.   This was implemented by adding 2
+    new C source code files to the package: getcolsb.c and putcolsb.c.
+
+  - Defined a new '1S' shorthand data code for a signed byted column in
+    a binary table.  CFITSIO will write TFORMn = '1B' and
+    TZEROn = -128 in this case, which is the convention used to
+    store signed byte values in a 'B' type column.
+
+  - in fitsio2.h, added test of whether  `__x86_64__` is defined, to 
+    support the new AMD Opteron 64-bit processor
+
+  - modified configure to not use the -fast compiler flag on Solaris
+    platforms when using the proprietary Solaris cc compilar.  This
+    flag causes compilation problems in eval_y.c (compiler just
+    hangs forever).
+
+  Bug fixes:
+
+  - In the special case of writing 0 elements to a vector table column
+    that contains 0 rows, ffgcpr no longer adds a blank row to the table.
+    
+  - added error checking code for cases where a ASCII string column
+    in a binary table is greater than 28800 characters wide, to avoid
+    going into an infinite loop.
+
+  - the fits_get_col_display_width routine was incorrectly returning
+    width = 0 for a 'A' binary table column that did not have an 
+    explicit vector length character.
+
+Version 2.460 - 20 May 2003
+
+  Enhancements:
+
+  - modified the HTTP driver in drvrnet.c so that CFITSIO can read
+    FITS files via a proxy HTTP server.  (This code was contributed by
+    Philippe Prugniel, Obs. de Lyon).  To use this feature, the 
+    'http_proxy' environment variable must be defined with the
+    address (URL) and port number of the proxy server, i.e.,
+      > setenv http_proxy http://heasarc.gsfc.nasa.gov:3128
+    will use port 3128 on heasarc.gsfc.nasa.gov
+
+  - suppressed some compiler warnings by casting a variable of 
+    type 'size_t' to type 'int' in fftkey (in fitscore.c) and
+    iraftofits and irafrdimge (in iraffits.c).
+
+Version 2.450 - 30 April 2003
+
+  Enhancements:
+
+  - modified the WCS keyword reading routine (ffgics) to support cases
+    where some of the CDi_j keywords are omitted (with an assumed 
+    value = 0).
+
+  - Made a change to http_open_network in drvrnet.c to add a 'Host: '
+    string to the open request.  This is required by newer HTTP 1.1
+    servers (so-called virtual servers).
+
+  - modified ffgcll (read logical table column) to return the illegal
+    character value itself if the FITS file contains a logical value that is
+    not equal to T, F or zero.  Previously it treated this case the
+    same as if the FITS file value was = 0.
+
+  - modified fits_movnam_hdu (ffmnhd) so that it will move to a tile-
+    compressed image (that is stored in a binary table) if the input
+    desired HDU type is BINARY_TBL as well as if the HDU type = IMAGE_HDU.
+
+  Bug fixes:
+
+  - in the routine that checks the data fill bytes (ffcdfl), the call
+    to ffmbyt should not ignore an EOF error when trying to read the bytes.
+    This is a little-used routine that is not called by any other CFITSIO
+    routine.
+
+  - fits_copy_file was not reporting an error if it hit the End Of File
+    while copying the last extension in the input file to the output file.
+
+  - fixed inconsistencies in the virtual file column filter parser
+    (ffedit_columns) to properly support expressions which create or
+    modify a keyword, instead of a column.  Previously it was only possible
+    to modify keywords in a table extension (not an image), and the 
+    keyword filtering could cause some of the table columns to not
+    get propagated into the virtual file.  Also, spaces are now
+    allowed within the specified keyword comment field.
+
+  - ffdtyp was incorrectly returning the data type of FITS keyword
+    values of the form '1E-09' (i.e., an exponential value without
+    a decimal point) as integer rather than floating point.
+
+  - The enhancement in the previous 2.440 release to allow more files to be
+    opened at one time introduced a bug: if ffclos is called with
+    a non-zero status value, then any subsequent call to ffopen will likely
+    cause a segmentation fault.  The fits_clear_Fptr routine was modified
+    to fix this.
+
+  - rearranged the order of some computations in fits_resize_img so as
+    to not exceed the range of a 32-bit integer when dealing with 
+    large images.
+
+  - the template parser routine, ngp_read_xtension, was testing for
+    "ASCIITABLE" instead of "TABLE" as the XTENSION value of an ASCII
+    table, and it did not allow for optional trailing spaces in the IMAGE"
+    or "TABLE" string value.
+
+Version 2.440 - 8 January 2003
+
+  Enhancements:
+
+  - modified the iterator function, ffiter, to operate on random
+    groups files.
+
+  - decoupled the NIOBUF (= 40) parameter from the limit on the number
+    FITS files that can be opened, so that more files may be opened
+    without the overhead of having to increase the number of NIOBUF
+    buffers.  A new NMAXFILES parameter is defined in fitsio2.h which sets
+    the maximum number of opened FITS files.  It is set = 300 by default.
+    Note however, that the underlying compiler or operating system may
+    not allow this many files to be opened at one time.
+
+  - updated the version of cfortran.h that is distributed with CFITSIO from 
+    version 3.9 to version 4.4.  This required changes to f77_wrap.h
+    and f77_wrap3.c.  The original cfortran.h v4.4 file was modified
+    slightly to support CFITSIO and ftools (see comments in the header
+    of cfortran.h).
+
+  - modified ffhist so that it copies all the non-structural keywords from
+    the original binary table header to the binned image header.
+
+  - modified fits_get_keyclass so that it recognizes EXTNAME =
+    COMPRESSED_IMAGE as a special tile compression keyword.
+
+  - modified Makefile.in to support the standard --prefix convention
+    for specifying the install target directory.
+
+  Bug fixes:
+
+  - in fits_decompress_img, needed to add a call to ffpscl to turn
+    off the BZERO and BSCALE scaline when reading the compressed image.
+
+Version 2.430 - 4 November 2002
+
+  Enhancements:
+
+  - modified fits_create_hdu/ffcrhd so that it returns without doing
+    anything and does not generate an error if the current HDU is 
+    already an empty HDU.  There is no need in this case to append
+    a new empty HDU to the file.
+
+  - new version of group.c (supplied by B. O'Neel at the ISDC) fixes 2
+    limitations:  1 - Groups now have 256 characters rather than 160
+    for the path lengths in the group tables. - ISDC SPR 1720.  2 -
+    Groups now can have backpointers longer than 68 chars using the long
+    string convention. - ISDC SPR 1738.
+
+  - small change to f77_wrap.h and f77_wrap3.c to support the fortran
+    wrappers on SUN solaris 64-bit sparc systems (see also change to v2.033)
+
+  - small change to find_column in  eval_f.c to support unsigned long
+    columns in binary tables (with TZEROn = 2147483648.0)
+
+  - small modification to cfortran.h to support Mac OS-X, (Darwin)
+
+  Bug fixes:
+
+  - When reading tile-compress images, the BSCALE and BZERO scaling
+    keywords were not being applied, if present.
+
+  - Previous changes to the error message stack code caused the
+    tile compressed image routines to not clean up spurious error
+    messages properly.
+
+  - fits_open_image was not skipping over null primary arrays.
+
+Version 2.420 - 19 July 2002
+
+  Enhancements:
+
+  - modified the virtual filename parser to support exponential notation
+    when specifing the min, max or binsize in a binning specifier, as in:
+    myfile.fits[binr X=1:10:1.0E-01, Y=1:10:1.0E-01]
+
+  - removed the limitation on the maximum number of HDUs in a FITS file 
+    (limit used to be 1000 HDUs per file).  Now any number of HDUs
+    can be written/read in a FITS file. (BUT files that have huge numbers
+    of HDUs can be difficult to manage and are not recommended);
+
+  - modified grparser.c to support HIERARCH keywords, based on 
+    code supplied by Richard Mathar (Max-Planck)
+
+  - moved the ffflsh (fits_flush_buffer) from the private to the
+    public interface, since this routine may be useful for some  
+    applications.  It is much faster than ffflus.
+
+  - small change to the definition of OFF_T in fitsio.h to support
+    large files on IBM AIX operating systems.
+
+  Bug fixes:
+
+  - fixed potential problem reading beyond array bounds in ffpkls.  This
+    would not have affected the content of any previously generated FITS
+    files.
+
+  - in the net driver code in drvrnet.c, the requested protocol string
+    was changed from "http/1.0" to "HTTP/1.0" to support apache 1.3.26.
+
+  - When using the virtual file syntax to open a vector cell in a binary
+    table as if it were a primary array image, there was a bug
+    in fits_copy_image_cell which garbled the data if the vector
+    was more than 30000 bytes long.
+
+  - fixed problem that caused fits_report_error to crash under Visual
+    C++ on Windows systems.  The fix is to use the '/MD' switch
+    on the cl command line, or, in Visual Studio, under project
+    settings / C++ select use runtime library multithreaded DLL
+
+  - modified ffpscl so it does not attempt to reset the scaling values
+    in the internal structure if the image is tile-compressed.
+
+  - fixed multiple bugs in mem_rawfile_open which affected the case
+    where a raw binary file is read and converted on the fly into
+    a FITS file.
+
+  - several small changes to group.c to suppress compiler warnings.
+
+Version 2.410 - 22 April 2002 (used in the FTOOLS 5.2 release)
+
+  New Routines:
+
+  - fits_open_data behaves similarly to fits_open_file except that it
+    also will move to the first HDU containing significant data if
+    and an explicit HDU name or number to open was not specified.
+    This is useful for automatically skipping over a null primary
+    array when opening the file.
+
+  - fits_open_table and fits_open_image behaves similarly to 
+    fits_open_data, except they move to the first table or image
+    HDU in the file, respectively.
+
+  - fits_write_errmark and fits_clear_errmark routines can be use
+    to write an invisible marker to the CFITSIO error stack, and
+    then clear any more recent messages on the stack, back to 
+    that mark.  This preserves any older messages on the stack.
+
+  - fits_parse_range utility routine parses a row list string
+    and returns integer arrays giving the min and max row in each
+    range.
+
+  - fits_delete_rowrange deletes a specified list of rows or row
+    ranges.
+
+  - fits_copy_file copies all or part of the HDUs in the input file
+    to the output file.
+
+  - added fits_insert_card/ffikey to the publicly defined set
+    of routines (previously, it was a private routine).
+
+  Enhancements:
+
+  - changed the default numeric display format in ffgkys from 'E' format
+    to 'G' format, and changed the format for 'X' columns to a 
+    string of 8 1s or 0s representing each bit value.
+
+  - modified ffflsh so the system 'fflush' call is not made in cases
+    where the file was opened with 'READONLY' access.
+
+  - modified the output filename parser so the "-.gz", and "stdout.gz"
+    now cause the output file to be initially created in memory,
+    and then compressed and written out to the stdout stream when
+    the file is closed.
+
+  - modified the routines that delete rows from a table to also 
+    update the variable length array heap, to remove any orphaned
+    data from the heap.
+
+  - modified ffedit_columns so that wild card characters may be
+    used when specifying column names in the 'col' file filter
+    specifier (e.g.,  file.fits[col TIME; *RAW] will create a
+    virtual table contain only the TIME column and any other columns
+    whose name ends with 'RAW').
+
+  - modified the keyword classifier utility, fits_get_keyclass, to
+    support cases where the input string is just the keyword name,
+    not the entire 80-character card.
+
+  - modified configure.in and configure to see if a proprietary
+    C compiler is available (e.g. 'cc'), and only use 'gcc' if not.
+
+  - modified ffcpcl (copy columns from one table to another) so that
+    it also copies any WCS keywords related to that column.
+
+  - included an alternate source file that can be used to replace
+    compress.c, which is distributed under the GNU General Public
+    License.  The alternate file contains non-functional stubs for
+    the compression routines, which can be used to make a version of
+    CFITSIO that does not have the GPL restrictions (and is also less
+    functional since it cannot read or write compressed FITS files).
+
+  - modifications to the iterator routine (ffiter) to support writing
+    tile compressed output images.
+
+  - modified ffourl to support the [compress] qualifier when specifying
+    the optional output file name. E.g., file.fit(out.file[compress])[3]
+
+  - modified imcomp_compress_tile to fully support implicit data type
+    conversion when writing to tile-compressed images.  Previously,
+    one could not write a floating point array to an integer compressed
+    image.
+
+  - increased the number of internal 2880-byte I/O buffers allocated
+    by CFITSIO from 25 to 40, in recognition of the larger amount
+    of memory available on typical machines today compared with
+    a few years ago.  The number of buffers can be set by the user
+    with the NIOBUF parameter in fitsio2.h.  (Setting this too large
+    can actually hurt performance).
+
+  - modified the #if statements in fitsio2.h, f77_wrap.h and f77_wrap1.c
+    to support the new Itanium 64-bit Intel PC.
+
+  - a couple minor modifications to fitsio.h needed to support the off_t
+    datatype on debian linux systems.
+
+  - increased internal buffer sizes in ffshft and ffsrow to improve
+    the I/O performance.
+
+  Bug fixes:
+
+  - fits_get_keyclass could sometimes try to append to an unterminated 
+    string, causing an overflow of a string array.   
+
+  - fits_create_template no longer worked because of improvements made
+    to other routines.  Had to modify ffghdt to not try to rescan
+    the header keywords if the file is still empty and contains no
+    keywords yet.
+
+  - ffrtnm, which returns the root filename, sometimes did not work 
+    properly when testing if the 'filename+n' convention was used for
+    specifying an extension number.
+
+  - fixed minor problem in the keyword template parsing routine, ffgthd
+    which in rare cases could cause an improperly terminated string to
+    be returned.
+
+  - the routine to compare 2 strings, ffcmps, failed to find a match 
+    in comparing strings like "*R" and "ERROR" where the match occurs
+    on the last character, but where the same matching character occurs
+    previously in the 2nd string.
+
+  - the region file reading routine (ffrrgn) did not work correctly if
+    the region file (created by POW and perhaps other programs) had an
+    'exclude' region (beginning with a '-' sign) as the first region 
+    in the file.  In this case all points outside the excluded region
+    should be accepted, but in fact no points were being accepted
+    in this case.
+
+Version 2.401 - 28 Jan 2002
+
+  - added the imcopy example program to the release (and Makefile)
+
+  Bug fixes:
+
+  - fixed typo in the imcompress code which affected compression
+    of 3D datacubes.
+
+  - made small change to fficls (insert column) to allow colums with
+    TFORMn = '1PU' and '1PV' to be inserted in a binary table.  The
+    'U' and 'V' are codes only used within CFITSIO to represent unsigned
+    16-bit and 32-bit integers; They get replaced by '1PI' and '1PJ'
+    respectively in the FITS table header, along with the appropriate
+    TZEROn keyword.
+
+Version 2.400 - 18 Jan 2002
+
+  (N.B.: Application programs must be recompiled, not just relinked 
+     with the new CFITSIO library because of changes made to fitsio.h)
+
+  New Routines:
+
+  - fits_write_subset/ffpss writes a rectangular subset (or the whole
+    image) to a FITS image.
+
+  - added a whole new family of routines to read and write arrays of 
+    'long long' integers (64-bit) to FITS images or table columns.  The
+    new routine names all end in 'jj':  ffpprjj, ffppnjj, ffp2djj,
+    ffp3djj, ffppssjj, ffpgpjj, ffpcljj, ffpcnjj. ffgpvjj, ffgpfjj,
+    ffg2djj, ffg3djj, ffgsvjj, ffgsfjj, ffggpjj, ffgcvjj, and ffgcfjj.
+
+  - added a set of helper routines that are used in conjunction with
+    the new support for tiled image compression.  3 routines set the
+    parameters that should be used when CFITSIO compresses an image:
+        fits_set_compression_type
+        fits_set_tile_dim
+        fits_set_noise_bits
+
+      3 corresponding routines report back the current settings:
+        fits_get_compression_type
+        fits_get_tile_dim
+        fits_get_noise_bits
+
+  Enhancements:
+
+  - major enhancement was made to support writing to tile-compressed
+    images.  In this format, the image is divided up into a rectangular
+    grid of tiles, and each tile of pixels is compressed individually
+    and stored in a row of a variable-length array column in a binary
+    table.  CFITSIO has been able to transparently read this compressed
+    image format ever since version 2.1.  Now all the CFITSIO image
+    writing routines also transparently support this format.  There are
+    2 ways to force CFITSIO to write compressed images: 1) call the
+    fits_set_compression_type routine before writing the image header
+    keywords, or 2), specify that the image should be compressed when
+    entering the name of the output FITS file, using a new extended
+    filename syntax.  (examples: "myfile.fits[compress]" will use the
+    default compression parameters, and "myfile.fits[compress GZIP
+    100,100] will use the GZIP compression algorithm with 100 x 100
+    pixel tiles.
+
+  - added new driver to support creating output .gz compressed fits
+    files.  If the name of the output FITS file to be created ends with
+    '.gz' then CFITSIO will initially write the FITS file in memory and
+    then, when the FITS file is closed, CFITSIO will gzip the entire
+    file before writing it out to disk.
+
+  - when over-writing vectors in a variable length array in a binary
+    table, if the new vector to be written is less than or equal to
+    the length of the previously written vector, then CFITSIO will now
+    reuse the existing space in the heap, rather than always appending
+    the new array to the end of the heap.
+
+  - modified configure.in to support building cfitsio as a dynamic 
+    library on Mac OS X. Use 'make shared' like on other UNIX platforms,
+    but a .dylib file will be created instead of .so.  If installed in a 
+    nonstandard location, add its location to the DYLD_LIBRARY_PATH 
+    environment variable so that the library can be found at run time.
+
+  - made various modifications to better support the  8-byte long integer
+    datatype on more platforms.  The 'LONGLONG' datatype is typedef'ed
+    to equal 'long long' on most Unix platforms and MacOS, and equal
+    to '__int64' on Windows machines.
+
+  - modified configure.in and makefile.in to better support cases 
+    where the system has no Fortran compiler and thus the f77 wrapper
+    routines should not be compiled.
+
+  - made small modification to eval.y and eval_y.f to get rid of warning
+    on some platforms about redefinition of the 'alloca'.
+
+  Bug fixes:
+
+  - other recent bug fixes in ffdblk (delete blocks) caused ffdhdu (delete
+    HDU) to fail when trying to replace the primary array with a null
+    primary array.
+
+  - fixed bug that prevented inserting a new variable length column
+    into a table that already contained variable length data.
+
+  - modified fits_delete_file so that it will delete the file even if
+    the input status value is not equal to zero.
+
+  - in fits_resize_image, it was sometimes necessary to call ffrdef to
+    force the image structure to be defined.
+
+  - modified the filename parser to support input files with names like:
+    "myfile.fits.gz(mem://tmp)" in which the url type is specified for
+    the output file but not for the input file itself.  This required
+    modifications to ffiurl and ffrtnm.
+
+Version 2.301 -   7 Dec 2001
+
+  Enhancements:
+
+   - modified the http file driver so that if the filename to be opened
+     contains a '?' character (most likely a cgi related string) then it
+     will not attempt to append a .gz or .Z as it would normally do.
+
+   - added support for the '!' clobber character when specifying
+     the output disk file name in CFITSIO's extended filename syntax, e.g.,
+     'http://a.b.c.d/myfile.fits.gz(!outfile.fits)'
+
+   - added new device driver which is used when opening a compressed FITS
+     file on disk by uncompressing it into memory with READWRITE
+     access.  This happens when specifying an output filename
+     'mem://'.
+
+   - added 2 other device drivers to open http and ftp files in memory
+     with write access.
+
+   - improved the error trapping and reporting in cases where program
+     attempts to write to a READONLY file (especially in cases where the
+    'file' resides in memory, as is the case when opening an ftp or http
+     file.
+
+   - modified the extended filename parser so that it is does not confuse
+     the bracket character '[' which is sometimes used in the root name
+     of files of type 'http://', as the start of an extname or row filter
+     expression.  If the file is of type 'http://', the parser now
+     checks to see if the last character in the extended file name is
+     a ')' or ']'.  If not, it does not try to parse the file name
+     any further.
+
+   - improved the efficiency when writing FITS files in memory, by
+     initially allocating enough memory for the entire HDU when it is
+     created, rather than incrementally reallocing memory 2880 bytes
+     at a time (modified ffrhdu and mem_truncate).  This change also
+     means that the program will fail much sooner if it cannot allocate
+     enough memory to hold the entire FITS HDU.
+
+  Bug fixes:
+
+   - There was an error in the definition of the Fortran ftphtb wrapper
+     routine (writes required ASCII table header keywords) that caused
+     it to fail on DEC OSF and other platforms where sizeof(long) = 8.
+
+Version 2.300 - 23 Oct 2001
+
+  New Routines:
+
+   - fits_comp_img and fits_decomp_img are now fully supported and
+     documented.  These routine compress and decompress, respective,
+     a FITS image using a new algorithm in which the image is first
+     divided into a grid of rectangular tiles, then the compressed byte
+     stream from each tile is stored in a row of a binary table.
+     CFITSIO can transparently read FITS images stored in this
+     compressed format.  Compression ratios of 3 - 6 are typically
+     achieved.  Large compression ratios are achieved for floating
+     point images by throwing away non-significant noise bits in the
+     pixel values.
+
+   - fits_test_heap tests the integrity of the binary table heap and
+     returns statistics on the amount of unused space in the heap and
+     the amount of space that is pointed to by more than 1 descriptor.
+
+   - fits_compress_heap which will reorder the arrays in the binary
+     table heap, recovering any unused space.
+
+  Enhancements:
+
+   - made substantial internal changes to the code to support FITS
+     files containing 64-bit integer data values.  These files have
+     BITPIX = 64 or TFORMn = 'K'.  This new feature in CFITSIO is
+     currently only enabled if SUPPORT_64BIT_INTEGERS is defined = 1 in
+     the beginning of the fitsio2.h file.  By default support for
+     64-bit integers is not enabled.
+
+   - improved the ability to read and return a table column value as a
+     formatted string by supporting quasi-legal TDISPn values which
+     have a lowercase format code letter, and by completely ignoring
+     other unrecognizable TDISPn values.  Previously, unrecognized
+     TDISPn values could cause zero length strings to be returned.
+
+   - made fits_write_key_longstr more efficient when writing keywords
+     using the long string CONTINUE convention.  It previously did not
+     use all the available space on each card when the string to be
+     written contained many single quote characters.
+
+   - added a new "CFITSIO Quick Start Guide" which provides all the
+     basic information needed to write C programs using CFITSIO.
+
+   - updated the standard COMMENT keywords that are written at the 
+     beginning of every primary array to refer to the newly published
+     FITS Standard document in Astronomy and Astrophysics.
+     Note: because of this change, any FITS file created with this
+     version of CFITSIO will not be identical to the same file written
+     with a previous version of CFITSIO.
+
+   - replaced the 2 routines in pliocomp.c with new versions provided by
+     D Tody and N Zarate.  These routines compress/uncompress image pixels
+     using the IRAF pixel list compression algorithm.
+
+   - modified fits_copy_hdu so that when copying a Primary Array
+     to an Image extension, the COMMENT cards which give the reference
+     to the A&A journal article about FITS are not copied.  In the
+     inverse case the COMMENT keywords are inserted in the header.
+     
+   - modified configure and Makefile.in to add capability to build a
+     shared version of the CFITSIO library.  Type 'make shared' or 
+     'make libcfitsio.so' to invoke this option.
+
+   - disabled some uninformative error messages on the error stack:
+       1) when calling ffclos (and then ffchdu) with input status > 0
+       2) when ffmahd tries to move beyond the end of file.
+     The returned status value remains the same as before, but the
+     annoying error messages no longer get written to the error stack.
+
+   - The syntax for column filtering has been modified so that
+     if one only specifies a list of column names, then only those
+     columns will be copied into the output file.  This provides a simple
+     way to make a copy of a table containing only a specified list of
+     columns.  If the column specifier explicitly deletes a column, however,
+     than all the other columns will be copied to the filtered input
+     file, regardless of whether the columns were listed or not.
+     Similarly, if the expression specifies only a column to be modified
+     or created, then all the other columns in the table will be
+     copied.
+
+      mytable.fit[1][col Time;Rate]  - only the Time and Rate
+        columns will be copied to the filtered input file.
+
+      mytable.fit[1][col -Time ] - all but the Time column are copied
+        to the filtered input file.
+
+      mytable.fit[1][col Rate;-Time] - same as above.
+
+   - changed a '#if defined' statement in f77_wrap.h and f77_wrap1.c 
+     to support the fortran wrappers on 64-bit IBM/RS6000 systems
+
+   - modified group.c so that when attaching one group (the child) to 
+     another (the parent), check in each file for the existence of a 
+     pointer to the other before adding the link. This is to prevent
+     multiple links from forming under all circumstances.
+
+   - modified the filename parser to accept 'STDIN', 'stdin', 
+     'STDOUT' and 'stdout' in addition to '-' to mean read the
+     file from standard input or write to standard output.
+
+   - Added support for reversing an axis when reading a subsection
+     of a compressed image using the extended filename syntax, as in
+     myfile.fits+1[-*, *] or myfile.fits+1[600:501,501:600]
+
+   - When copying a compressed image to a uncompressed image, the
+     EXTNAME keyword is no longer copied if the value is equal to
+     'COMPRESSED_IMAGE'.
+
+   - slight change to the comment field of the DATE keyword to reflect
+     the fact that the Unix system date and time is not true UTC time.
+
+  Bug fixes:
+
+   - fits_write_key_longstr was not writing the keyword if a null
+     input string value was given.
+
+   - writing data to a variable length column, if that binary table is not
+     the last HDU in the FITS file, might overwrite the following HDU.
+     Fixed this by changing the order of a couple operations in ffgcpr.
+
+   - deleting a column from a table containing variable length columns
+     could cause the last few FITS blocks of the file to be reset = 0.
+     This bug occurred as a result of modifications to ffdblk in v2.202.
+     This mainly affects users of the 'compress_fits' utility
+     program.
+
+   - fixed obscure problem when writing bits to a variable length 'B' 
+     column.
+
+   - when reading a subsection of an image, the BSCALE and BZERO pixel
+     scaling may not have been applied when reading image pixel values
+     (even though the scaling keywords were properly written in the
+     header).
+
+   - fits_get_keyclass was not returning 'TYP_STRUCT_KEY' for the
+     END keyword.
+
+Version 2.204 - 26 July 2001 
+
+  Bug fixes:
+
+   - Re-write of fits_clean_url in group.c to solve various problems
+     with invalid bounds checking.
+
+Version 2.203 -  19 July 2001 (version in FTOOLS v5.1)
+
+  Enhancements:
+
+   - When a row selection or calculator expression is written in
+     an external file (and read by CFITSIO with the '@filename' syntax)
+     the file can now contain comment lines.  The comment line must
+     begin with 2 slash characters as the first 2 characters on the
+     line.  CFITSIO will ignore the entire line when reading the
+     expression.
+
+  Bug fixes:
+
+   - With previous versions of CFITSIO, the pixel values in a FITS
+     image could be read incorrectly in the following case: when
+     opening a subset of a FITS image (using the
+     'filename.fits[Xmin:Xmax,Ymin:Ymax]' notation) on a PC linux, PC
+     Windows, or DEC OSF machine (but not on a SUN or Mac).  This
+     problem only occurs when reading more than 8640 bytes of data
+     (2160 4-byte integers) at a time, and usually only occurs if the
+     reading program reads the pixel data immediately after opening the
+     file, without first reading any header keywords.  This error would
+     cause strips of zero valued pixels to appear at semi-random
+     positions in the image, where each strip usually would be 2880
+     bytes long.  This problem does not affect cases where the input
+     subsetted image is simply copied to a new output FITS file.
+
+
+Version 2.202 -  22 May 2001
+
+  Enhancements:
+
+   - revised the logic in the routine that tests if a point is
+     within a region:  if the first region is an excluded region,
+     then it implicitly assumes a prior include region covering
+     the entire detector.  It also now supports cases where a 
+     smaller include region is within a prior exclude region.
+
+   - made enhancement to ffgclb (read bytes) so that it can
+     also read values from a logical column, returning an array
+     of 1s and 0s.  
+
+   - defined 2 new grouping error status values (349, 350) in 
+     cfitsio.h and made minor changes to group.c to use these new
+     status values.
+
+   - modified fits_open_file so that if it encounters an error while
+     trying to move to a user-specified extension (or select a subset
+     of the rows in an input table, or make a histogram of the
+     column values) it will close the input file instead of leaving
+     it open.
+
+   - when using the extended filename syntax to filter the rows in
+     an input table, or create a histogram image from the values in
+     a table column, CFITSIO now writes HISTORY keywords in the 
+     output file to document the filtering expression that was used.
+
+  Bug fixes:
+
+   - ffdblk (called by ffdrow) could overwrite the last FITS block(s) in 
+     the file in some cases where one writes data to a variable length
+     column and then calls ffdrow to delete rows in the table.  This
+     bug was similar to the ffiblk bug that was fixed in v2.033.
+
+   - modified fits_write_col_null to fix a problem which under unusual
+     circumstances would cause a End-of-File error when trying to
+     read back the value in an ASCII string column, after initializing
+     if by writing a null value to it. 
+
+   - fixed obscure bug in the calculator function that caused an
+     error when trying to modify the value of a keyword in a HDU
+     that does not have a NAXIS2 keyword (e.g., a null primary array).
+
+   - the iterator function (in putcol.c) had a bug when calculating
+     the optimum number rows to process in the case where the table
+     has very wide rows (>33120 bytes) and the calculator expression
+     involves columns from more than one FITS table.  This could
+     cause an infinite loop in calls to the ffcalc calculator function.
+
+   - fixed bug in ffmvec, which modifies the length of an 
+     existing vector column in a binary table.  If the vector
+     was reduced in length, the FITS file could sometimes be left
+     in a corrupted state, and in all cases the values in the remaining
+     vector elements of that column would be altered.
+
+   - in drvrfile.c, replaced calls to fsetpos and fgetpos with
+     fseek and ftell (or fseeko and ftello) because the fpos_t
+     filetype used in fsetpos is incompatible with the off_t
+     filetype used in fseek, at least on some platforms (Linux 7.0).
+     (This fix was inserted into the V2.201 release on April 4).
+
+   - added "#define fits_write_pixnull ffppxn" to longnam.h
+
+Version 2.201 - 15 March 2001
+
+  Enhancements
+
+   - enhanced the keyword reading routines so that they will do
+     implicit datatype conversion from a string keyword value
+     to a numeric keyword value, if the string consist of a
+     valid number enclosed in quotes.  For example, the keyword
+     mykey = '37.5' can be read by ffgkye.
+
+   - modified ffiimg so that it is possible to insert a new
+     primary array at the beginning of the file.  The original
+     primary array is then converted into an IMAGE extension.
+
+   - modified ffcpdt (copy data unit) to support the case where 
+     the data unit is being copied between 2 HDUs in the same file.
+
+   - enhanced the fits_read_pix and fits_read_pixnull routines so
+     that they support the tiled image compression format that the
+     other image reading routines also support.
+
+   - modified the Extended File Name syntax to also accept a 
+     minus sign (-) as well as an exclamation point (!) as
+     the leading character when specifying a column or or keyword
+     to be deleted, as in [col -time] will delete the TIME column.
+
+   - now completely support reading subimages, including pixel
+     increments in each dimension, for tile-compressed images
+     (where the compressed image tiles are stored in a binary
+      table).
+
+  Bug fixes:
+
+   - fixed confusion in the use of the fpos_t and off_t datatypes
+     in the fgetpos and fsetpos routines in drvrfile.c which caused
+     problems with the Windows VC++ compiler.  (fpos_t is not 
+     necessarily identical to off_t)
+
+   - fixed a typo in the fits_get_url function in group.c which 
+     caused problems when determining the relative URL to a compressed
+     FITS file.
+
+   - included fitsio.h in the shared memory utility program,
+     smem.c, in order to define OFF_T. 
+
+   - fixed typo in the datatype of 'nullvalue' in ffgsvi, which caused
+     attempts to read subsections of a short integer tiled compressed
+     image to fail with a bus error.    
+
+   - fixed bug in ffdkey which sometimes worked incorrectly if one 
+     tried to delete a nonexistent keyword beyond the end of the header.
+
+   - fixed problem in fits_select_image_section when it writes a dummy
+     value to the last pixel of the section.  If the image contains
+     scaled integer pixels, then in some cases the pixel value could end
+     up out of range.
+
+   - fixed obscure bug in the ffpcn_ family of routines which gave
+     a floating exception when trying to write zero number of pixels to
+     a zero length array  (why would anyone do this?)
+
+Version 2.200 - 26 Jan 2001
+
+  Enhancements
+
+   - updated the region filtering code to support the latest region
+     file formats that are generated by the POW, SAOtng and ds9
+     programs.  Region positions may now be given in HH:MM:SS.s,
+     DD:MM:SS.s format, and region sizes may be given arcsec or arcmin
+     instead of only in pixel units.  Also changed the logic so that if
+     multiple 'include' regions are specified in the region file, they
+     are ORed together, instead of ANDed, so that the filtering keeps
+     points that are located within any of the 'include' regions, not
+     just the intersection of the regions.
+
+   - added support for reading raw binary data arrays by converting
+     them on the fly into virtual FITS files.
+
+   - modified ffpmsg, which writes error messages to CFITSIO's internal
+     error stack, so that messages > 80 characters long will be wrapped
+     around into multiple 80 character messages, instead of just
+     being truncated at 80 characters.
+
+   - modified the CFITSIO parser so that expression which involve
+     scaled integer columns get cast to double rather than int.
+
+   - Modified the keyword template parsing routine, ffgthd, to
+     support the HIERARCH keyword.
+
+   - modified ffainit and ffbinit so that they don't unnecessarily
+     allocate 0 bytes of memory if there are no columns (TFIELDS = 0)
+     in the table that is being opened.
+
+   - modified fitsio2.h to support NetBSD on Alpha OSF platforms
+     (NetBSD does not define the '__unix__' symbol).
+
+   - changed the way OFF_T is defined in fitsio.h for greater
+     portability.
+
+   - changed drvrsmem.c so it is compiled only when HAVE_SHMEM_SERVICES
+     is defined in order to removed the conditional logic from the Makefile
+
+   - reorganized the CFITSIO User's guide to make it
+     clearer and easier for new users to learn the basic routines.
+
+   - fixed ffhdef (which reserves space for more header keywords) so
+     that is also updates the start position of the next HDU.  This
+     affected the offset values returned by ffghof.
+
+Version 2.100 - 18 Oct 2000
+
+  Enhancements
+
+   - made substantial modification to the code to support Large files,
+     i.e., files larger than 2**31 bytes = 2.1GB.  FITS files up to
+     6 terabytes in size may now be read and written on platforms
+     that support Large files (currently only Solaris).
+
+   - modified ffpcom and ffphis, which write COMMENT and HISTORY 
+     keywords, respectively, so that they now use columns 9 - 80, 
+     instead of only columns 11 - 80.  Previously, these routines
+     avoided using columns 9 and 10, but this is was unnecessarily
+     restrictive.
+
+   - modified ffdhdu so that instead of refusing to delete the 
+     primary array, it will replace the current primary array 
+     with a null primary array containing the bare minimum of
+     required keywords and no data.
+
+  New Routines
+
+   - fits_read_pix, fits_read_pixnull, fits_read_subset, and fits_write_pix
+     routines were added to enable reading and writing of Large images,
+     with more than 2.1e9 pixels.  These new routines are now recommended
+     as the basic routines for reading and writing all images.
+
+   - fits_get_hduoff returns the byte offset in the file to
+     the start and end of the current HDU.  This routine replaces the
+     now obsolete fits_get_hduaddr routine;  it uses 'off_t' instead of
+     'long' as the datatype of the arguments and can support offsets
+     in files greater than 2.1GB in size.
+
+  Bug fixes:
+
+   - fixed bug in fits_select_image_section that caused an integer
+     overflow when reading very large image sections (bigger than
+     8192 x 8192 4-byte pixels).
+
+   - improved ffptbb, the low-level table writing routine, so that 
+     it will insert additional rows in the table if the table is
+     not already big enough.  Previously it would have just over-
+     written any HDUs following the table in the FITS file.
+
+   - fixed a bug in the  fits_write_col_bit/ffpclx routine which
+     could not write to a bit 'X' column if that was the first column
+     in the table to be written to.  This bug would not appear if
+     any other datatype column was written to first.
+
+   - nonsensible (but still formally legal) binary table TFORM values
+     such as '8A15', or '1A8' or 'A8' would confuse CFITSIO and cause it
+     to return a 308 error.  When parsing the TFORMn = 'rAw' value,
+     the ffbnfm routine has been modified to ignore the 'w' value in cases 
+     where w > r.
+
+   - fixed bug in the blsearch routine in iraffits.c which sometimes
+     caused an out-of-bounds string pointer to be returned when searching
+     for blank space in the header just before the 'END' keyword.
+
+   - fixed minor problem in ffgtcr in group.c, which sometimes failed
+     while trying to move to the end of file before appending a
+     grouping table.
+
+   - on Solaris, with Sun CC 5.0, one must check for '__unix' rather
+     than '__unix__' or 'unix' as it's symbol.  Needed to modify this
+     in drvrfile.c in 3 places.
+
+   - in ffextn, the FITS file would be left open if the named
+     extension doesn't exist, thus preventing the file from being
+     opened again later with write access.
+
+   - fixed bug in ffiimg that would cause attempts to insert a new
+     image extension following a table extension, and in front of any
+     other type of extension, to fail.
+
+Version 2.037 - 6 July 2000
+
+  Enhancements
+
+   - added support in the extended filename syntax for flipping
+     an image along any axis either by specifying a starting 
+     section pixel number greater than the ending pixel number,
+     or by using '-*' to flip the whole axis.  Examples:
+     "myfile.fits[1:100, 50:10]" or "myfile.fits[-*,*]".
+
+   - when reading a section of an image with the extended filename
+     syntax (e.g. image.fits[1:100:2, 1:100:2), any CDi_j WCS keywords
+     will be updated if necessary to transfer the world coordinate
+     system from the imput image to the output image section.
+
+   - on UNIX platforms, added support for filenames that begin
+     with "~/" or "~user/".  The "~" symbol will get expanded
+     into a string that gives the user's home directory.
+
+   - changed the filename parser to support disk file names that
+     begin with a minus sign.  Previously, the leading minus sign would
+     cause CFITSIO to try to read/write the file from/to stdin/stdout.
+
+   - modified the general fits_update_key routine, which writes
+     or updates a keyword value, to use the 'G' display format
+     instead of the 'E' format for floating point keyword values.
+     This will eliminate trailing zeros from appearing in the value.
+
+   - added support for the "-CAR" celestial coordinate projection
+     in the ffwldp and ffxypx routines.  The "-CAR" projection is
+     the default simplest possible linear projection.
+
+   - added new fits_create_memfile/ffimem routine to create a new
+     fits file at a designated memory location.
+
+   - ported f77_wrap.h and f77_wrap1.c so that the Fortran interface
+     wrappers work correctly on 64-bit SGI operating systems.  In this
+     environment, C 'long's  are 8-bytes long, but Fortran 'integers'
+     are still only 4-bytes long, so the words have to be converted
+     by the wrappers.
+
+   - minor modification to cfortran.h to automatically detect when it
+     is running on a linux platform, and then define f2cFortran in that
+     case.  This eliminates the need to define -Df2cFortran on the
+     command line.
+
+   - modified group.c to support multiple "/" characters in
+     the path name of the file to be opened/created.
+
+   - minor modifications to the parser (eval.y, eval_f.c, eval_y.c)
+     to a) add the unary '+' operator, and b) support copying the
+     TDIMn keyword from the input to the output image under certain
+     circumstances.
+
+   - modified the lexical parser in eval_l.y and eval_l.c to
+     support #NULL and #SNULL constants which act to set the
+     value to Null.  Support was also added for the C-conditional
+     expression: 'boolean ? trueVal : falseVal'.
+
+   - small modification to eval_f.c to write an error message to
+     the error stack if numerical overflow occurs when evaluating
+     an expression.
+
+   - configure and configure.in now support the egcs g77 compiler
+     on Linux platforms.
+
+  Bug fixes:
+
+   - fixed a significant bug when using the extended filename binning
+     syntax to generate a 2-dimensional image from a histogram of the
+     values in 2 table columns.  This bug would cause table events that
+     should have been located in the row just below the bottom row of
+     the image (and thus should have been excluded from the histogram)
+     to be instead added into the first row of the image.  Similarly,
+     the first plane of a 3-D or 4-D data cube would include the events
+     that should have been excluded as falling in the previous plane of
+     the cube.
+
+   - fixed minor bug when parsing an extended filename that contains
+     nested pairs of square brackets (e.g., '[col newcol=oldcol[9]]').
+
+   - fixed bug when reading unsigned integer values from a table or
+     image with fits_read_col_uint/ffgcvuk.  This bug only occurred on
+     systems like Digital Unix (now Tru64 Unix) in which 'long'
+     integers are 8 bytes long, and only when reading more than 7200
+     elements at a time.  This bug would generally cause the program to
+     crash with a segmentation fault.
+
+   - modified ffgcpr to update 'heapstart' as well as 'numrows' when
+     writing more rows beyond the end of the table.  heapstart
+     is needed to calculate if more space needs to be inserted in the
+     table when inserting columns into the table.
+
+   - modified fficls (insert column), ffmvec, ffdrow and ffdcol to 
+     not use the value of the NAXIS2 keyword as the number of rows
+     in the table, and instead use the value that is stored in
+     an internal structure, because the keyword value may not
+     be up to date.
+
+   - Fixed bug in the iterator function that affected the handling
+     of null values in string columns in ASCII and binary tables.
+
+   - Reading a subsample of pixels in very large images, (e.g., 
+     file = myfile.fits[1:10000:10,1:10000:10],  could cause a
+     long integer overflow (value > 2**31) in the computation of the
+     starting byte offset in the file, and cause a return error status
+     = 304 (negative byte address).  This was fixed by changing the
+     order of the arithmetic operations in calculating the value of
+     'readptr' in the ffgcli, ffgclj, ffgcle, ffgcld, etc. routines.
+
+   - In version 2.031, a fix to prevent compressed files from being
+     opened with write privilege was implemented incorrectly.  The fix
+     was intended to not allow a compressed FITS file to be opened
+     except when a local uncompressed copy of the file is being
+     produced (then the copy is opened with write access), but in fact
+     the opposite behavior occurred:  Compressed files could be opened
+     with write access, EXCEPT when a local copy is produced.   This
+     has been fixed in the mem_compress_open and file_compress_open
+     routines.
+
+   - in iraffits.c, a global variable called 'val' caused multiply
+     defined symbols warning when linking cfitsio and IRAF libraries.
+     This was fixed by making 'val' a local variable within the
+     routine.
+
+Version 2.036 - 1 Feb 2000
+
+   - added 2 new generic routines, ffgpf and ffgcf which are analogous
+     to ffgpv and ffgcv but return an array of null flag values instead
+     of setting null pixels to a reserved value.
+
+   - minor change to eval_y.c and eval.y to "define alloca malloc"
+     on all platforms, not just VMS.
+
+   - added support for the unsigned int datatype (TUINT) in the
+     generic ffuky routine and changed ffpky so that unsigned ints
+     are cast to double instead of long before being written to 
+     the header. 
+
+   - modified ffs2c so that if a null string is given as input then
+     a null FITS string (2 successive single quotes) will be returned.
+     Previously this routine would just return a string with a single
+     quote, which could cause an illegal keyword record to be written.
+
+   - The file flush operation on Windows platforms apparently
+     changes the internal file position pointer (!) in violation of the
+     C standard.  Put a patch into the file_flush routine to explicitly
+     seek back to the original file position.
+
+   - changed the name of imcomp_get_compressed_image_parms to
+     imcomp_get_compressed_image_par to not exceed the 31 character
+     limit on some compilers.
+
+   - modified the filename parser (which is used when moving to a
+     named HDU) to support EXTNAME values which contain embedded blanks.
+
+   - modified drvrnet.c to deal with ftp compressed files better so
+     that even fits files returned from cgi queries which have the wrong
+     mime types and/or wrong types of file names should still decompress.
+
+   - modified ffgics to reduce the tolerance for acceptable skewness
+     between the axes, and added a new warning return status = 
+     APPROX_WCS_KEY in cases where there is significant skewness
+     between the axes.
+
+   - fixed bug in ffgics that affected cases where the first coordinate
+     axis was DEC, not RA, and the image was a mirror image of the sky.
+
+   - fixed bug in ffhist when trying to read the default binning
+     factor keyword, TDBIN.
+
+   - modified ffhist so that is correctly computes the rotation angle
+     in a 2-D image if the first histogram column has a CROTA type
+     keyword but the 2nd column does not.
+
+   - modified ffcpcl so that it preserves the comment fields on the
+     TTYPE and TFORM keywords when the column is copied to a new file.
+
+   - make small change to configure.in to support FreeBSD Linux 
+     by setting CFLAGS = -Df2cFortran instead of -Dg77Fortran. Then
+     regenerated configure with autoconf 2.13 instead of 2.12.     
+
+Version 2.035 - 7 Dec 1999 (internal release only, FTOOLS 5.0.2)
+
+   - added new routine called fits_get_keyclass/ffgkcl that returns
+     the general class of the keyword, e.g., required structural 
+     keyword, WCS keyword, Comment keyword, etc.  15 classes of
+     keywords have been defined in fitsio.h
+
+   - added new routine called fits_get_img_parm/ffgipr that is similar
+     to ffgphd but it only return the bitpix, naxis, and naxisn values.
+
+   - added 3 new routines that support the long string keyword
+     convention: fits_insert_key_longstr, fits_modify_key_longstr
+     fits_update_key_longstr.
+
+   - modified ffgphd which reads image header keywords to support
+     the new experimental compressed image format.
+
+   - when opening a .Z compressed file, CFITSIO tries to allocate
+     memory equal to 3 times the file size, which may be excessive
+     in some cases.  This was changed so that if the allocation fails,
+     then CFITSIO will try again to allocate only enough memory
+     equal to 1 times the file size.  More memory will be allocated
+     later if this turns out to be too small.
+
+   - improved the error checking in the fits_insert_key routine
+     to check for illegal characters in the keyword.
+
+Version 2.034 - 23 Nov 1999
+
+   - enhanced support for the new 'CD' matrix world coordinate system
+     keywords in the ffigics routine.  This routine has been enhanced
+     to look for the new 'CD' keywords, if present, and convert them
+     back to the old CDELTn and CROTAn values, which are then returned.  
+     The routine will also swap the WCS parameters for the 2 axes if
+     the declination-like axis is the first WCS axis.
+
+   - modified ffphbn in putkey.c to support the 'U' and 'V" TFORM characters
+     (which represent unsigned short and unsigned int columns) in variable
+     length array columns.  (previously only supported these types in
+     fixed length columns).
+
+   - added checks when reading gzipped files to detect unexpected EOF.
+     Previously, the 'inflate_codes' routine would just sit in an infinite 
+     loop if the file ended unexpectedly.
+
+   - modified fits_verify_chksum/ffvcks so that checksum keywords with
+     a blank value string are treated as undefined, the same as
+     if the keyword did not exist at all.
+
+   - fixed ffghtb and ffghbn so that they return the extname value 
+     in cases where there are no columns in the table.
+
+   - fixed bug in the ffgtwcs routine (this is a little utility 
+     routine to aid in interfacing to Doug Mink's WCS routines);
+     it was not correctly padding the length of string-valued keywords
+     in the returned string.
+
+   - fixed bug in 'iraffits.c' that prevented Type-2 IRAF images from
+     being correctly byte-swapped on PCs and DEC-OSF machines.
+
+   - fixed tiny memory leak in irafncmp in iraffits.c.  Only relevant when
+     reading IRAF .imh files.
+
+   - fixed a bug (introduced in version 2.027) that caused the keyword
+     reading routines to sometimes not find a matching keyword if the
+     input name template used the '*' wildcard as the last character.
+     (e.g., if input name = 'COMMENT*' then it would not find the
+     'COMMENT' keywords.  (It would have found longer keywords like
+     'COMMENTX' correctly). The fix required a minor change to ffgcrd
+     in getkey.c
+
+   - modified the routine (ffswap8) that does byteswapping of
+     double precision numbers.  Some linux systems have reported floating
+     point exceptions because they were trying to interpret the bytes
+     as a double before the bytes had been swapped.
+
+   - fixed bug in the calculation of the position of the last byte
+     in the string of bits to be read in ffgcxuk and ffgcxui.  This
+     bug generally caused no harm, but could cause the routine to
+     exit with an invalid error message about trying to read
+     beyond the size of the field.
+
+   - If a unix machine did not have '__unix__', 'unix', or  '__unix'
+     C preprocessor symbols defined, then CFITSIO would correctly open
+     one FITS file, but would not correctly open subsequent files. Instead
+     it would think that the same file was being opened multiple times.
+     This problem has only been seen on an IBM/AIX machine. The fits_path2url
+     and fits_url2path routines in group.c were modified to fix the problem.
+
+   - fixed bug in group.c, which affected WINDOWS platforms only, that 
+     caused programs to go into infinite loop when trying to open
+     certain files.
+
+   - the ftrsim Fortran wrapper routine to ffrsim was not defined
+     correctly, which caused the naxis(2) value to be passed incorrectly
+     on Dec OSF machines, where sizeof(long) != sizeof(int).
+
+Version 2.033 - 17 Sept 1999
+
+   - New Feature: enhanced the row selection parser so that comparisons
+     between values in different rows of the table are allowed, and the
+     string comparisons with <, >, <=, and >= are supported.
+
+   - added new routine the returns the name of the keyword in the
+     input keyword record string.  The name is usually the first
+     8 characters of the record, except if the HIERARCH convention
+     is being used in which case the name may be up to 67 characters
+     long.
+
+   - added new routine called fits_null_check/ffnchk that checks to
+     see if the current header contains any null (ASCII 0) characters.
+     These characters are illegal in FITS headers, but they go undetected
+     by the other CFITSIO routines that read the header keywords.
+
+   - the group.c file has been replaced with a new version as supplied
+     by the ISDC.  The changes are mainly to support partial URLs and
+     absolute URLs more robustly.  Host dependent directory paths are
+     now converted to true URLs before being read from/written to
+     grouping tables.
+
+   - modified ffnmhd slightly so that it will move to the first extension
+     in which either the EXTNAME or the HDUNAME keyword is equal to the
+     user-specified name.  Previously, it only checked for HDUNAME if
+     the EXTNAME keyword did not exist.
+
+   - made small change to drvrnet.c so that it uncompress files 
+     which end in .Z and .gz just as for ftp files.
+
+   - rewrote ffcphd (copy header) to handle the case where the
+     input and output HDU are in the same physical FITS file.
+
+   - fixed bug in how long string keyword values (using the CONTINUE
+     convention) were read.  If the string keyword value ended in an
+     '&' character, then fits_read_key_longstr, fits_modify_key_str,
+     and fits_delete_key would interpret the following keyword as
+     a continuation, regardless of whether that keyword name was
+     'CONTINUE' as required by this convention.  There was also a bug
+     in that if the string keyword value was all blanks, then 
+     fits_modify_key_str could in certain unusual cases think
+     that the keyword ended in an '&' and go into an infinite loop.
+
+   - modified ffgpv so that it calls the higher level ffgpv_ routine
+     rather than directly calling the lower level ffgcl_ routine. This
+     change is needed to eventually support reading compressed images.
+
+   - added 3 new routines to get the image datatype, image dimensions,
+     and image axes length.  These support the case where the image is
+     compressed and stored in a binary table.
+
+   - fixed bug in ffiblk that could sometimes cause it to insert a
+     new block in a file somewhere in the middle of the data, instead
+     of at the end of the HDU.  This fortunately is a rare problem,
+     mainly only occurring in certain cases when  inserting rows in a binary 
+     table that contains variable length array data (i.e., has a heap).
+
+   - modified fits_write_tdim so that it double checks the TFORMn
+     value directly if the column repeat count stored in the internal
+     structure is not equal to the product of all the dimensions.
+
+   - fixed bug that prevented ffitab or ffibin from inserting a new
+     table after a null primary array (can't read NAXIS2 keyword).
+     Required a small change to ffrdef.
+
+   - modified testprog.c so that it will continue to run even if
+     it cannot open or process the template file testprog.tpt.
+
+   - modified the logic in lines 1182-1185 of grparser.c so that
+     it returns the correct status value in case of an error.
+
+   - added test in fitsio2.h to see if __sparcv9 is defined; this
+     identifies a machine running Solaris 7 in 64-bit mode where
+     long integers are 64 bits long.
+
+Version 2.032 - 25 May 1999
+
+   - the distribution .tar file was changed so that all the files
+     will be untarred into a  subdirectory by default instead of
+     into the current directory.
+
+   - modified ffclos so that it always frees the space allocated by
+     the fptr pointer, even when another fptr points to the same file.
+
+   - plugged a potential (but rare in practice) memory leak in ffpinit
+
+   - fixed bug in all the ffp3d_ and ffg3d_ routines in cases where
+     the data cube that has been allocated in memory has more planes
+     than the data cube in the FITS file.
+
+   - modified drvrsmem.c so that it allocates a small shared
+     memory segment only if CFITSIO tries to read or write a
+     FITS file in shared memory.  Previously it always allocated
+     the segment whether it was needed or not.  Also, this small
+     segment is removed if 0 shared memory segments remain in 
+     the system.
+
+   - put "static" in front of 7 DECLARE macros in compress.c
+     because these global variables were causing conflicts with other
+     applications programs that had variables with the same names.
+
+   - modified ffasfm to return datatype = TDOUBLE instead of TFLOAT
+     if the ASCII table column has TFORMn = 'Ew.d' with d > 6.
+
+   - modified the column reading routines to a) print out the offending
+     entry if an error occurs when trying to read a numeric ASCII table
+     column, and b) print out the column number that had the error
+     (the messages are written to CFITSIOs error stack)
+
+   - major updates to the Fortran FITSIO User's Guide to include many
+     new functions that have been added to CFITSIO in the past year.
+
+   - modified fitsio2.h so that the test for __D_FLOAT etc. is only
+     made on Alpha VMS machines, to avoid syntax errors on some other
+     platforms.
+
+   - modified ffgthd so that it recognizes a floating point value
+     that uses the 'd' or 'D' exponent character.
+
+   - removed the range check in fftm2s that returned an error if
+     'decimals' was less than zero.  A negative value is OK and is
+     used to return only the date and not the time in the string.
+
+Version 2.031 - 31 Mar 1999
+
+   - moved the code that updates the NAXIS2 and PCOUNT keywords from
+     ffchdu into the lower lever ffrdef routine.  This ensures that
+     other routines which call ffrdef will correctly update these 2
+     keywords if required.  Otherwise, for instance, calling 
+     fits_write_checksum before closing the HDU could cause the NAXIS2
+     keyword (number of rows in the table) to not be updated.
+
+   - fixed bug (introduced in version 2.030) when writing null values
+     to a primary array or image extension.  If trying to set more
+     than 1 pixel to null at a time, then typically only 1 null would
+     be written.  Also fixed related bug when writing null values to
+     rows in a table that are beyond the currently defined size of the
+     table (the size of the table was not being expanded properly).
+
+   - enhanced the extended filename parser to support '*' in image
+     section specifiers, to mean use the whole range of the axis.
+     myfile.fits[*,1:100] means use the whole range of the first
+     axis and pixels 1 to 100 in the second axis.  Also supports
+     an increment, as in myfile.fits[*:2, *:2] to use just the
+     odd numbered rows and columns.
+
+   - modified fitscore.c to set the initial max size of the header, when
+     first reading it, to the current size of the file, rather than to 
+     2 x 10**9 to avoid rare cases where CFITSIO ends up writing a huge 
+     file to disk.
+
+   - modified file_compress_open so that it will not allow a compressed
+     FITS file to be opened with write access.  Otherwise, a program
+     could write to the temporary copy of the uncompressed file, but
+     the modification would be lost when the program exits.
+
+Version 2.030 - 24 Feb 1999
+
+   - fixed bug in ffpclu when trying to write a null value to a row
+     beyond the current size of the table (wouldn't append new rows
+     like it should).
+
+   - major new feature:  enhanced the routines that read ASCII string
+     columns in tables so that they can read any table column, including
+     logical and numeric valued columns.  The column values are returned
+     as a formatted string.  The format is determined by the TDISPn
+     keyword if present, otherwise a default format based on the
+     datatype of the column is used.
+
+  -  new routine:  fits_get_col_display_width/ffgcdw returns the length
+     of the formatted strings that will be returned by the routines that
+     read table columns as strings. 
+
+   - major new feature:  added support for specifying an 'image section'
+     when opening an image:  e.g,  myfile.fits[1:512:2,2:512:2] to 
+     open a 256x256 pixel image consisting of the odd columns and the 
+     even numbered rows of the input image.
+
+   - added supporting project files and instructions for building 
+     CFITSIO under Windows NT with the Microsoft Visual C++ compiler.
+
+   - changed the variable 'template' to 'templt' in testprog.c since
+     it conflicted with a reserved word on some compilers.
+
+   - modified group.c to conditionally include sys/stat.h only on
+     unix platforms
+
+   - fixed bug in the ffiter iterator function that caused it to always
+     pass 'firstn' = 1 to the work function when reading from the
+     primary array or IMAGE extension. It worked correctly for tables.
+
+   - fixed bug in the template header keyword parser (ffgthd) in cases
+     where the input template line contains a logical valued keyword
+     (T or F) without any following comment string.  It was previously
+     interpreting this as a string-valued keyword.
+
+   - modified ffrhdu that reads and opens a new HDU, so that it
+     ignores any leading blank characters in the XTENSION name, e.g.,
+     XTENSION= '  BINTABLE' will not cause any errors, even though
+     this technically violates the FITS Standard.
+
+   - modified ffgtbp that reads the required table keywords to make
+     it more lenient and not exit with an error if the THEAP keyword
+     in binary tables cannot be read as an integer.  Now it will
+     simply ignore this keyword if it cannot be read.
+
+   - added test for 'WIN32' as well as '__WIN32__' in fitsio2.h,
+     eval.l and eval_l.c in a preprocessor statement.
+
+   - changed definition of strcasecmp and strncasecmp in fitsio2.h,
+     eval.l and eval_l.c to conform to the function prototypes under
+     the Alpha VMS v7.1 compiler.
+
+   - corrected the long function names in longnam.h for the new WCS 
+     utility functions in wcssubs.c
+
+Version 2.029 - 11 Feb 1999
+
+   - fixed bug in the way NANs and underflows were being detected on
+     VAX and Alpha VMS machines.
+
+   - enhanced the filename parser to distinguish between a VMS-style
+     directory name (e.g.  disk:[directory]myfile.fits) and a CFITSIO
+     filter specifier at the end of the name.
+
+   - modified ffgthd to support the HIERARCH convention for keyword
+     names that are longer than 8 characters or contain characters
+     that would be illegal in standard FITS keyword names.
+
+   - modified the include statements in grparser.c so that malloc.h 
+     and memory.h are only included on the few platforms that really
+     need them.
+
+   - modified the file_read routine in drvrfile.c to ignore the last
+     record in the FITS file it it only contains a single character that
+     is equal to 0, 10 or 32.  Text editors sometimes append a character
+     like this to the end of the file, so CFITSIO will ignore it and
+     treat it as if it had reached the end of file.
+
+   - minor modifications to fitsio.h to help support the ROOT environment.
+
+   - installed new version of group.c and group.h; the main change
+     is to support relative paths (e.g.  "../filename") in the URLs
+
+   - modified the histogramming routines so that it looks for the
+     default preferred column axes in a keyword of the form
+     CPREF = 'Xcol, Ycol'
+     instead of separate keywords of the form
+     CPREF1 = 'Xcol'
+     CPREF2 = 'Ycol'
+
+   - fixed bug so that if the binning spec is just a single integer,
+     as in  [bin 4] then this will be interpreted as meaning to make
+     a 2D histogram using the preferred or default axes, with the
+     integer taken as the binning factor in both axes.
+
+Version 2.028 - 27 Jan 1999
+
+   - if the TNULLn keyword value was outside the range of a 'I' or 'B'
+     column, an overflow would occur when setting the short or char 
+     to the TNULLn value, leading to incorrect values being flagged as
+     being undefined.  This has been fixed so that CFITSIO will ignore
+     TNULLn values that are beyond the range of the column data type.
+
+   - changed a few instances of the string {"\0"} to {'\0'} in the
+     file groups.c
+
+   - installed new version of the grparser.c file from the ISDC
+
+   - added new WCS support routines (in wcssub.c) which make it easier
+     to call Doug Mink's WCSlib routines for converting between plate
+     and sky coordinates.   The CFITSIO routines themselves never
+     call a WCSlib routine, so CFITSIO is not dependent on WCSlib.
+
+   - modified  ffopen so that if you use the extended filename
+     syntax to both select rows in a table and then bin columns into
+     a histogram, then CFITSIO will simply construct an array listing
+     the good row numbers to be used when making the histogram,
+     instead of making a whole new temporary FITS file containing
+     the selected rows.
+
+   - modified ffgphd which parses the primary array header keywords
+     when opening a file, to not choke on minor format errors in 
+     optional keywords.  Otherwise, this prevents CFITSIO from
+     even opening the file.
+
+   - changed a few more variable declarations in compress.c from global
+     to static.
+
+Version 2.027 - 12 Jan 1999
+
+   - modified the usage of the output filename specifier so that it,
+       a) gives the name of the binned image, if specified, else,
+       b) gives the name of column filtered and/or row filtered table, if 
+          specified, else
+       c) is the name for a local copy of the ftp or http file, else,
+       d) is the name for the local uncompressed version of the compressed
+          FITS file, else,
+       e) the output filename is ignored.
+
+   - fixed minor bug in ffcmps, when comparing 2 strings while using
+     a '*' wild card character.
+
+   - fixed bug in ftgthd that affected cases where the template string
+     started with a minus sign and contained 2 tokens (to rename a
+     keyword).
+
+   - added support for the HIERARCH keyword convention for reading 
+     and writing keywords longer than 8 characters or that contain
+     ASCII characters not allowed in normal FITS keywords. 
+
+   - modified the extended filename syntax to support opening images
+     that are contained in a single cell of a binary table with syntax:
+     filename.fits[extname; col_name(row_expression)]
+
+Version 2.026 - 23 Dec 1998
+
+   - modified the group parser to:
+     a) support CFITSIO_INCLUDE_FILES environment variable, which can
+     point to the location of template files, and, 
+     b) the FITS file parameter passed to the parser no longer has to point
+     to an empty file.  If there are already HDUs in the file, then the
+     parser appends new HDUs to the end of the file.
+
+   - make a small change to the drvrnet.c file to accommodate creating
+     a static version of the CFITSIO library.
+
+   - added 2 new routines to read consecutive bits as an unsigned integer 
+     from a Bit 'X' or Byte 'B' column (ffgcxui and ffgcxuk).
+
+   - modified the logic for determining histogram boundaries in ffhisto
+     to add one more bin by default, to catch values that are right on
+     the upper boundary of the histogram, or are in the last partial bin.
+
+   - modified cfitsio2.h to support the new Solaris 7 64-bit mode operating
+     system.
+
+   - Add utility routine, CFits2Unit, to the Fortran wrappers which searches
+     the gFitsFiles array for a fptr, returning its element (Fortran unit
+     number), or allocating a new element if one doesn't already
+     exists... for C calling Fortran calling CFITSIO.
+
+   - modified configure so that it does not use the compiler optimizer
+     when using gcc 2.8.x on Linux
+
+   - (re)added the fitsio.* documentation files that describe the
+     Fortran-callable FITSIO interface to the C routines.
+
+   - modified the lexical parser in eval_f.c to fix bug in null detections
+     and bug in ffsrow when nrows = 0.
+
+   - modified ffcalc so that it creates a TNULLn keyword if appropriate 
+     when a new column is created.  Also fixed detection of OVERFLOWs
+     so that it ignores null values.
+
+   - added hyperbolic trig and rounding functions to
+     the lexical parser in the eval* files.
+
+   - improved error message that gets written when the group number is
+     out of range when reading a 'random groups' array.
+
+   - added description of shared memory, grouping, and template parsing
+     error messages to ffgerr and to the User's Guide.  Moved the error
+     code definitions from drvsmem.h to fitsio.h.
+
+   - modified grparser.c to compile correctly on Alpha/OSF machines
+
+   - modified drvrnet.c to eliminate compiler warnings
+
+   - Modified Makefile.in to include targets for building all the sample
+     programs that are included with CFITSIO.
+
+Version 2.025 - 1 Dec 1998
+
+   - modified ffgphd and ffgtbp so that they ignores BLANK and TNULLn keywords
+     that  do not have a valid integer value.  Also, any error while reading
+     the BSCALE, BZERO, TSCALn, or TZEROn keywords will be ignored.  
+     Previously, CFITSIO would have simply refused to read an HDU that had 
+     such an invalid keyword.
+
+   - modified the parser in eval_f.c to accept out of order times in GTIs
+
+   - updated cfitsio_mac.sit.hqx to fix bad target parameters for Mac's
+     speed test program
+
+   - modified template parser in grparser.c to: 1) not write GRPNAME keyword
+     twice, and 2) assign correct value for EXTVERS keyword.
+
+   - fixed minor bugs in group.c; mainly would only affect users of the
+     INTEGRAL Data Access Layer.
+
+   - temporarily removed the prototype for ffiwcs from fitsio.h until
+     full WCS support is added to CFITSIO in the near future.
+
+   - modified the HTTP driver to send a User-Agent string:
+     HEASARC/CFITSIO/<version number>
+
+   - declared local variables in compress.c as 'static' to avoid
+     conflicts with other libraries.
+
+Version 2.024 - 9 Nov 1998
+
+   - added new function fits_url_type which returns the driver prefix string
+     associated with a particular FITS file pointer.
+
+Version 2.023 - 1 Nov 1998 - first full release of CFITSIO 2.0
+
+   - slightly modified the way real keyword values are formatted, to ensure
+     that it includes a decimal point.  E.g.,  '1.0E-09' instead of '1E-09'
+
+   - added new function to support template files when creating new FITS files.
+
+   - support the TCROTn WCS keyword in tables, when reading the WCS keywords.
+
+   - modified the iterator to support null values in logical columns in
+     binary tables.
+
+   - fixed bug in iterator to support null values in integer columns in
+     ASCII tables.
+
+   - changed the values for FLOATNULLVALUE and DOUBLENULLVALUE to make them
+     less likely to duplicate actual values in the data.
+
+   - fixed major bug when freeing memory in the iterator function.  It caused
+     mysterious crashes on a few platforms, but had no effect on most others.
+
+   - added support for reading IRAF format image (.imh files)
+
+   - added more error checking to return an error if the size of the FITS
+     file exceeds the largest value of a long integer (2.1 GB on 32-bit
+     platforms).
+
+   - CFITSIO now will automatically insert space for additional table rows
+     or add space to the data heap, if one writes beyond the current end
+     of the table or heap.  This prevents any HDUs which might follow
+     the current HDU from being overwritten.  It is thus no longer necessary
+     to explicitly call fits_insert_rows before writing new rows of data
+     to the FITS file.
+
+   - CFITSIO now automatically keeps track of the number of rows that have
+     been written to a FITS table, and updates the NAXIS2 keyword accordingly
+     when the table is closed.  It is no longer necessary for the application
+     program to updated NAXIS2.  
+
+   - When reading from a FITS table, CFITSIO will now return an error if the
+     application tries to read beyond the end of the table. 
+
+   - added 2 routines to get the number of rows or columns in a table.
+
+   - improved the undocumented feature that allows a '20A' column to be
+     read as though it were a '20B' column by fits_read_col_byt.  
+
+   - added overflow error checking when reading keywords.  Previously, the
+     returned value could be silently truncated to the maximum allowed value
+     for that data type.  Now an error status is returned whenever an 
+     overflow occurs.
+
+   - added new set of routines dealing with hierarchical groups of files.
+     These were provided by Don Jennings of the INTEGRAL Science Data Center.
+
+   - added new URL parsing routines.
+
+   - changed the calling sequence to ffghad (get HDU address) from
+     ffghad(fitsfile *fptr, > long *headstart, long *dataend) to
+     ffghad(fitsfile *fptr, > long *headstart, long datastart, 
+            long *dataend, int *status) 
+
+   - major modification to support opening the same FITS file more
+     than once.  Now one can open the same file multiple times and
+     read and write simultaneously to different HDUs within the file.
+     fits_open_file automatically detects if the file is already opened.
+
+   - added the ability to clobber/overwrite an existing file
+     with the same name when creating a new output file.  Just
+     preceed the output file name with '!' (an exclamation mark)
+
+   - changed the ffpdat routine which writes the DATE keyword
+     to use the new 'YYYY-MM-DDThh:mm:ss' format.
+
+   - added several new routines to create or parse the new date/time
+     format string.
+
+   - changed ifdef for DECFortran in f77_wrap.h and f77_wrap1.c:
+     expanded to recognize Linux/Alpha
+
+   - added new lexical parsing routines (from Peter Wilson):
+     eval_l.c, eval_y.c, eval_f.c, eval_defs.h, and eval_tab.h.
+     These are used when doing on-the-fly table row selections.
+
+   - added new family of routines to support reading and writing
+     'unsigned int' data type values in keywords, images or tables.
+
+   - restructured all the putcol and getcol routines to provide
+     simpler and more robust support for machines which have
+     sizeof(long) = 8.  Defined a new datatype INT32BIT which is
+     always 32 bits long (platform independent) and is used internally
+     in CFITSIO when reading or writing BITPIX = 32 images or 'J'
+     columns.  This eliminated the need for specialize routines like
+     ffswaplong, ffunswaplong, and ffpacklong.
+
+   - overhauled cfileio.c (and other files) to use loadable drivers for
+     doing data I/O to different devices.  Now CFITSIO support network 
+     access to ftp:// and http:// files, and to shared memory files.
+
+   - removed the ffsmem routine and replaced it with ffomem.  This will
+     only affect software that reads an existing file in core memory.
+     (written there by some other process).
+
+   - modified all the ffgkn[] routines (get an array of keywords) so
+     that the 'nfound' parameter is = the number of keywords returned,
+     not the highest index value on the returned keywords.  This makes
+     no difference if the starting index value to look for = 1.
+     This change is not backward compatible with previous versions
+     of CFITSIO, but is the way that FITSIO behaved.
+
+   - added new error code = 1 for any application error external
+     to CFITSIO.  Also reports "unknown error status" if the
+     value doesn't match a known CFITSIO error.
+
+Version 1.42 - 30 April 1998 (included in FTOOLS 4.1 release)
+
+   - modified the routines which read a FITS float values into
+     a float array, or read FITS double values into a double array,
+     so that the array value is also explicitly set in addition
+     to setting the array of flag values, if the FITS value is a NaN.
+     This ensures that no NaN values get passed back to the calling
+     program, which can cause serious problems on some platforms (OSF).
+
+   - added calls to ffrdef at the beginning of the insert
+     or delete rows or columns routines in editcol.c to make sure
+     that CFITSIO has correctly initialized the HDU information.
+
+   - added new routine ffdrws to delete a list of rows in a table
+
+   - added ffcphd to copy the header keywords from one hdu to another
+
+   - made the anynul parameter in the ffgcl* routines optional
+     by first checking to see if the pointer is not null before
+     initializing it.
+
+   - modified ffbinit and ffainit to ignore minor format
+     errors in header keywords so that cfitsio can at least
+     move to an extension that contains illegal keywords.
+
+   - modified all the ffgcl* routines to simply return without
+     error if nelem = 0.
+
+   - added check to ffclose to check the validity of the fitsfile
+     pointer before closing it.  This should prevent program crashes
+     when someone tries to close the same file more than once.
+
+   - replaced calls to strcmp and strncmp with macros FSTRCMP and
+     FSTRNCMP in a few places to improve performance when reading
+     header keywords (suggested by Mike Noble)
+
+  Bug Fixes:
+
+   - fixed typo in macro definition of error 504 in the file fitsio.h.
+
+   - in ffopen, reserved space for 4 more characters in the input
+     file name in case a '.zip' suffix needs to be added.
+
+   - small changes to ffpclx to fix problems when writing bit (X) data
+     columns beyond the current end of file.
+
+   - fixed small bug in ffcrhd where a dummy pointer was not initialized
+
+   - initialized the dummy variable in ffgcfe and ffgcfd which
+     was causing crashes under OSF in some cases.
+
+   - increased the length of the allocated string ffgkls by 2
+     to support the case of reading a numeric keyword as a string
+     which doesn't have the enclosing quote characters.
+
+Version 1.4 - 6 Feb 1998 
+
+   - major restructuring of the CFITSIO User's Guide
+
+   - added the new 'iterator' function.  The fortran wrapper is
+     in f77_iter.c for now.
+
+   - enhanced ffcrtb so that it writes a dummy primary array
+     if none currently exists before appending the table.
+
+   - removed the ffgcl routine and replaced it with ffgcvl 
+
+   - modified ffpcnl to just take a single input null value instead
+     of an entire array of null value flags.
+
+   - modified ffcmps and ffgnxk so that, for example, the string 'rate' 
+     is not considered a match to the string 'rate2', and 'rate*'
+     is a match to the string 'rate'.
+
+   - modified ffgrsz to also work with images, in which case
+     it returns the optimum number of pixels to process at
+     one time.
+
+   - modified ffgthd to support null valued keywords
+
+   - added a new source file 'f77_wrap.c' that includes all the
+     Fortran77 wrapper routines for calling CFITSIO.  This will
+     eventually replace the Fortran FITSIO library.
+
+   - added new routines:
+     ffppn - generic write primary array with null values
+     ffpprn - write null values to primary array
+
+     ffuky - 'update' a keyword value, with any specified datatype.
+
+     ffrprt - write out report of error status and error messages
+     ffiter - apply a user function iteratively to all the rows of a table
+     ffpkyc - write complex-valued keyword
+     ffpkym - write double complex-valued keyword
+     ffpkfc - write complex-valued keyword in fixed format
+     ffpkfm - write double complex-valued keyword in fixed format
+
+     ffgkyc - read complex-valued keyword
+     ffgkym - read double complex-valued keyword
+
+     ffmkyc - modify complex-valued keyword
+     ffmkym - modify double complex-valued keyword
+     ffmkfc - modify complex-valued keyword in fixed format
+     ffmkfm - modify double complex-valued keyword in fixed format
+
+     ffukyc - update complex-valued keyword
+     ffukym - update double complex-valued keyword
+     ffukfc - update complex-valued keyword in fixed format
+     ffukfm - update double complex-valued keyword in fixed format
+
+     ffikyc - insert complex-valued keyword
+     ffikym - insert double complex-valued keyword
+     ffikfc - insert complex-valued keyword in fixed format
+     ffikfm - insert double complex-valued keyword in fixed format
+
+     ffpktp - write or modify keywords using ASCII template file
+     ffcpcl - copy a column from one table to another
+     ffcpky - copy an indexed keyword from one HDU to another
+     ffpcnl - write logical values, including nulls, to binary table
+     ffpcns - write string values,  including nulls, to table
+     ffmnhd - move to HDU with given exttype, EXTNAME and EXTVERS values
+     ffthdu - return the total number of HDUs in the file
+     ffghdt - return the type of the  CHDU
+     ffflnm - return the name of the open FITS file
+     ffflmd - return the mode of the file (READONLY or READWRITE)
+
+   - modified ffmahd and ffmrhd (to move to a new extension) so that
+     a null pointer may be given for the returned HDUTYPE argument.
+
+   - worked around a bug in the Mac CWpro2 compiler by changing all
+     the statements like "#if BYTESWAPPED == TRUE" to "if BYTESWAPPED".
+
+   - modified ffitab (insert new ASCII table) to allow tables with
+     zero number of columns
+
+   - modified Makefile.in and configure to define the -Dg77Fortran
+     CFLAGS variable on Linux platforms.  This is needed to 
+     compile the new f77_wrap.c file (which includes cfortran.h)
+
+  Bug Fixes:
+
+   - fixed small bug in ffgrz (get optimum row size) which sometimes
+     caused it to return slightly less than the maximum optimum size.
+     This bug would have done no harm to application programs.
+
+   - fixed bug in ffpclk and ffgclk to add an 'else' case
+     if size of int is not equal to size of short or size of long.
+
+   - added test to ffgkls to check if the input string is not null before
+     allocating memory for it.
+
+Version 1.32 - 21 November 1997 (internal release only)
+
+   - fixed bug in the memory deallocation (free) statements
+     in the ffopen routine in the cfileio.c file.
+
+   - modified ffgphd to tolerate minor violations of the FITS 
+     standard in the format of the XTENSION = 'IMAGE   '
+     keyword when reading FITS files.  Extra trailing spaces
+     are now allowed in the keyword value.  (FITS standard
+     will be changed so that this is not a violation).
+
+Version 1.31 - 4 November 1997 (internal release only)
+
+  Enhancements:
+
+   - added support for directly reading compressed FITS files
+     by copying the algorithms from the gzip program. This 
+     supports the Unix compress, gzip and pkzip algorithms.
+
+   - modified ffiimg, ffitab, and ffibin (insert HDUs into
+     a FITS file) so that if the inserted HDU is at the end of
+     the FITS file, then it simply appends a new empty HDU
+     and writes the required keywords.  This allows space
+     to be reserved for additional keywords in the header
+     if desired.
+
+   - added the ffchfl and ffcdfl routines to check the header and
+     data fill values, for compatibility with the Fortran FITSIO
+     library.
+
+   - added the ffgsdt routine to return the system date
+     for compatibility with the Fortran FITSIO library.
+
+   - added a diagnostic error message (written to the error stack)
+     if the routines that read data from image or column fail.
+
+   - modified ffgclb so that it simply copies the bytes from 
+     an ASCII 'nA' or 'An' format column into the user's byte
+     array.  Previously, CFITSIO would return an error when 
+     trying to read an 'A' column with ffgclb.
+
+   - modified ffpclb so that it simply copies the input array 
+     of bytes to an ASCII 'nA' or 'An' format column.
+     Previously, CFITSIO would return an error when 
+     trying to write to an 'A' column with ffpclb.
+
+  Bug Fixes:
+
+   - ffgkls was allocating one too few bytes when reading continued
+     string keyword values. 
+
+   - in testprog.c added code to properly free the memory that
+     had been allocated for string arrays.
+
+   - corrected typographical errors in the User's Guide.
+
+Version 1.30 - 11 September 1997
+
+   - major overhaul to support reading and writing FITS files
+     in memory.   The new routines fits_set_mem_buff and 
+     fits_write_mem_buff have been added to initialize and
+     copy out the memory buffer, respectively.
+
+   - added support for reading FITS files piped in on 'stdin'
+     and piped out on 'stdout'.  Just specify the file name as '-'
+     when opening or creating the FITS file.
+
+   - added support for 64-bit SGI IRIX machines.  This required
+     adding routines to pack and unpack 32-bit integers into
+     64-bit integers.
+
+   - cleaned up the code that supports G_FLOAT and IEEE_FLOAT
+     on Alpha VMS systems.  Now, the type of float is determined
+     at compile time, not run time.
+
+  Bug Fixes:
+
+   - replaced the malloc calls in the error message stack routines
+     with a static fixed size array.  The malloc's cause more
+     problems than they solved, and were prone to cause memory
+     leaks if users don't clear the error message stack when
+     closing the FITS file.
+
+   - when writing float or double keywords, test that the value
+     is not a special IEEE value such as a NaN.  Some
+     compilers would write the string 'NaN' in this case into
+     the output value string.
+
+   - fixed bug in ffiblk, to ignore EOF status return if it is
+     inserting blocks at the end of the file.
+
+   - removed the 'l' from printf format string that is constructed
+     in the ffcfmt routine.  This 'l' is non-standard and causes problems
+     with the Metrowerks compiler on a Mac.
+
+   - the default null value in images was mistakenly being set
+     equal to NO_NULL = 314, rather than NULL_UNDEFINED = 1234554321
+     in the ffgphd routine.
+
+   - check status value in ffgkls to make sure the keyword exists
+     before allocating memory for the value string.
+
+   - fixed the support for writing and reading unsigned long integer
+     keyword values in ffpky and ffgky by internally treating
+     the values as doubles.  This required changes to ffc2r and
+     ffc2d as well.
+
+   - added explicit cast to 'double' in one place in putcolb.c and
+     6 places in pubcolui.c, to get rid of warning messages issued
+     by one compiler.
+
+   - in ffbinit and ffainit, it is necessary to test that tfield > 0
+     before trying to allocate memory with calloc.  Otherwise, some
+     compilers return a null pointer which CFITSIO interprets to 
+     mean the memory allocation failed.
+
+   - had to explicitly cast the null buffer pointer to a char
+     pointer (cptr = (char *)buffer;) in 4 places in the buffers.c
+     file to satisfy a picky C++ compiler.
+
+   - changed the test for an ALPHA VMS system to see if
+     '__VMS' is defined, rather than 'VMS'.  The latter
+     is not defined by at least one C++ compiler.
+
+   - modified ffpcls so that it can write a null string to
+     a variable length string column, without going into
+     an infinite loop.
+
+   - fixed bug in ffgcfl that caused the 'next' variable to be
+     incremented twice.
+
+   - fixed bug in ffgcpr that caused it write 2x the number of
+     complex elements into the descriptor when writing to
+     a complex or double complex variable length array column.
+
+   - added call to ffrdef at the end of ffrsim to ensure that
+     the internal structures are updated to correspond to the
+     modified header keywords
+
+Version 1.25 - 7 July 1997
+
+   - improved the efficiency of the ffiblk routine, when inserting
+     more than one block into the file.
+
+   - fixed bug in ffwend that in rare instances caused the beginning
+     of the following extension to be overwritten by blank fill.
+
+   - added new routine to modify the size of an existing primary
+     array or image extension: fits_resize_img/ffrsim.
+
+   - added support for null-valued keywords, e.g., keywords that
+     have no defined value.  These keywords have an equal sign and
+     space in columns 9-10, but have not value string.  Example:
+     KEYNAME =                      / null-valued keyword
+     Support for this feature required the following changes:
+       - modified ffpsvc to return a null value string without error
+       - modified ffc2[ilrd] to return error VALUE_UNDEFINED in this case
+       - modified ffgkn[sljed] to continue reading additional keywords
+         even if one or more keywords have undefined values.
+       - added 4 new routines:  ffpkyu, ffikyu, ffmkyu, ffukyu to
+         write, insert, modify, or update an undefined keyword
+
+   - a new makefile.os2 file was added, for building CFITSIO
+     on OS/2 systems.
+
+   - modified ffgtkn so that if it finds an unexpected keyword
+     name, the returned error status = BAD_ORDER instead of
+     NOT_POS_INT.
+
+   - added 2 new routines, fits_write_key_unit/ffpunt and
+     fits_read_key_unit/ffgunt to write/read the physical
+     units of a keyword value.  These routines use a local
+     FITS convention for storing the units in square brackets
+     following the '/' comment field separator, as in:
+     VELOCITY=                   12 / [km/s] orbit speed 
+     The testprog.c program was modified to test these
+     new routines.
+
+   - in the test of Alpha OSF/1 machines in fitsio2.h,
+     change 'defined(unix)' to 'defined(__unix__)' which
+     appears to be a more robust test.
+
+   - remove test for linux environment variable from fitsio2.h
+
+Version 1.24 - 2 May 1997
+
+   - fixed bug in ffpbyt that incorrectly computed the current
+     location in the FITS file when writing > 10000 bytes.
+
+   - changed the datatype of the 'nbytes' parameter in ffpbyt 
+     from 'int' to 'long'.   Made corresponding datatype change
+     to some internal variables in ffshft.
+
+   - changed '(unsigned short *)' to '(short *)' in getcolui.c, and
+     changed '(unsigned long *)'  to '(long *)'  in getcoluj.c, to
+     work around problem with the VAX/VMS cc compiler.
+
+Version 1.23 - 24 April 1997
+
+   - modified ffcins and ffdins (in editcol.c) to simply return 
+     without error if there are no (zero) rows in the table.
+
+Version 1.22 - 18 April 1997
+
+   - fixed bug in ffgcpr that caused it to think that all values were
+     undefined in ASCII tables columns that have TNULLn = '        '
+     (i.e., the TNULLn keyword value is a string of blanks.
+
+   - fixed bug in the ffgcl[bdeijk,ui,uj] family of routines
+     when parsing a numeric value in an ASCII table.  The
+     returned values would have the decimal place shifted to
+     the left if the table field contained an explicit decimal
+     point followed by blanks.  Example:  in an F5.2 column,
+     the value '16.  ' would be returned as 0.16.  If the
+     trailing zeros were present, then cfitsio returned the
+     correct value (e.g.,  '16.00' returns 16.).
+
+   - fixed another bug in the ffgcl[bdeijk,ui,uj] family of routines
+     that caused them to misread values in an ASCII table in rows
+     following an undefined value when all the values were read
+     at once in a single call to the routine.
+
+Version 1.21 - 26 March 1997
+
+   - added general support for reading and writing unsigned integer
+     keywords, images, and binary table column values.
+
+   - fixed bug in the way the column number was used in ffgsve and
+     similar routines.  This bug caused cfitsio to read (colnum - 1)
+     rather than the desired column.
+
+   - fixed a bug in ftgkls that prevented it from reading more than one
+     continuation line of a long string keyword value.
+
+   - fixed the definition of fits_write_longwarn in longnam.h
+
+Version 1.20 - 29 Jan 1997
+
+   - when creating a binary table with variable length vector columns, if the
+     calling routine does not specify a value for the maximum length of
+     the vector (e.g.,  TFORMn = '1PE(400)')  then cfitsio will automatically
+     calculate the maximum value and append it to the TFORM value
+     when the binary table is first closed.
+
+   - added the set of routines to do coordinate system transformations
+
+   - added support for wildcards ('*', '?', and '#') in the input
+     keyword name when reading, modifying, or deleting keywords.
+
+   - added new general keyword reading routine, ffgnxk, to return
+     the next keyword whose name matches a list of template names,
+     but does not match any names on a second template list.
+
+   - modified ftgrec so that it simply moves to the beginning
+     of the header if the input keyword number = 0
+
+   - added check in ffdelt to make sure the input fits file pointer is
+     not already null
+
+   - added check in ffcopy to make sure the output HDU does not
+     already contain any keywords (it must be empty).
+
+   - modified ffgcls so that it does not test if each string column
+     value equals the null string value if the null string value
+     is longer than the width of the column.
+
+   - fixed bug in ftgtdm that caused it to fail if the TDIMn 
+     keyword did not exist in the FITS file
+
+   - modified testprog.c to include tests of keyword wildcards
+     and the WCS coordinate transformation routines.
+
+   - added a test for 'EMX' in fitsio2.h so that cfitsio builds 
+     correctly on a PC running OS/2.
+
+Version 1.11 - 04 Dec 1996
+
+   - modified the testprog.c program that is included with the
+     distribution, so that the output FITS file is identical to
+     that produced by the Fortran FITSIO test program.
+
+   - changed all instances of the 'extname' variable to 'extnm'
+     to avoid a conflict with the -Dextname switch in cfortran.h
+     on HP machines.
+
+   - in all the routines like ffi4fi1, which convert an array
+     of values to integers just prior to writing them to the FITS
+     file, the integer value is now rounded to the nearest integer
+     rather than truncated. (ffi4fi1, ffi4fi2, ffi4fi4, etc)
+
+   - changed ffgcfl (and hence ffgcl) so that the input value
+     of the logical array element is not changed if the corresponding
+     FITS value is undefined.
+
+   - in ffgacl, the returned value of TBCOL was off by 1 (too small)
+
+   - fixed the comment of EXTNAME keyword to read 'binary table'
+     instead of 'ASCII table' in the header of binary tables.
+
+Version 1.101 - 17 Nov 1996
+
+   - Made major I/O efficiency improvements by adding internal buffers
+     rather than directly reading or writing to disk.  Access to 
+     columns in binary tables is now 50 - 150 times faster.  Access to
+     FITS image is also slightly faster.
+
+   - made significant speed improvements when reading numerical data
+     in FITS ASCII tables by writing my own number parsing routines
+     rather than using the sscanf C library routine.  This change
+     requires that the -lm argument now be included when linking
+     a program that calls cfitsio (under UNIX).
+
+   - regrouped the source files into logically related sets of routines.
+     The Makefile now runs much faster since every single routine is
+     not split into a separate file.
+
+   - now use the memcpy function, rather than a 'for' loop in several
+     places for added efficiency
+
+   - redesigned the low-level binary table read and write routines
+     (ffpbytoff and ffgbytoff) for greater efficiency.
+
+   - added a new error status: 103 = too many open FITS files.
+
+   - added a 'extern "C"' statement around the function prototypes
+     in fitsio.h, to support use of cfitsio by C++ compilers.
+
+   - fixed routines for writing or reading fixed-length substrings
+     within a binary table ASCII column, with TFORM values of
+     of the form 'rAw' where 'r' is the total width of the ASCII
+     column and 'w' is the width of a substring within the column.
+
+   - no longer automatically rewrite the END card and following fill
+     values if they are already correct.
+
+   - all the 'get keyword value and comment' routines have been changed 
+     so that the comment is not returned if the input pointer is NULL.
+
+   - added new routine to return the optimum number of tables rows
+     that should be read or written at one time for optimum efficiency.
+
+   - modified the way numerical values in ASCII tables are parsed so
+     that embedded spaces in the value are ignored, and implicit
+     decimal points are now supported.   (e.g, the string '123E 12'
+     in a 'E10.2' format column will be interpreted as 1.23 * 10**12).
+
+   - modified ffpcl and ffgcl to support binary table columns of
+     all datatype (added logical, bit, complex, and double complex)
+
+   - when writing numerical data to ASCII table columns, the ffpcl_
+     routines now return an overflow error if a value is too large
+     to be expressed in the column format.
+
+   - closed small memory leak in ffpcls.
+
+   - initialized the 'incre' variable in ffgcpr to eliminate compiler warning.
+
+Version 1.04 - 17 Sept 1996
+
+   - added README.MacOS and cfitsio_mac.sit.hqx to the distribution
+     to support the Mac platforms.
+
+   - fixed bug in ffpdfl that caused an EOF error (107) when a program
+     creates a new extension that is an exact multiple of 2880 bytes long,
+     AND the program does not write a value to the last element
+     in the table or image.
+
+   - fixed bug in all the ffgsf* and ffgcv* routines which caused
+     core dumps when reading null values in a table.
+
+Version 1.03 - 20 August 1996
+
+   - added full support for reading and writing the C 'int'
+     data type.  This was a problem on Alpha/OSF where short,
+     int, and long datatypes are 2, 4, and 8 bytes long, respectively.
+
+   - cleaned up the code in the byte-swapping routines.
+
+   - renamed the file 'longname.h' to 'longnam.h' to avoid conflict
+     with a file with the same name in another unrelated package.
+
+Version 1.02 - 15 August 1996
+
+   - ffgtbp was not correctly reading the THEAP keyword, hence would
+     not correctly read variable length data in binary tables if
+     the heap was not at the default starting location (i.e., 
+     starting immediately after the fixed length table).
+
+   - now force the cbuff variable in ffpcl_ and ffgcl_ to be
+     aligned on a double word boundary.  Non-alignment can
+     cause program to crash on some systems.
+
+Version 1.01 - 12 August 1996
+
+   - initial public release