Return to NEWS CVS log

Up to [CSRG BSD Unix] / 41BSD / lib / libI77uc

Annotation of 41BSD/lib/libI77uc/NEWS, revision 1.1

1.1     ! root        1:        Update info on the f77 I/O lib.
        !             2: 
        !             3: 01 Feb, 1980
        !             4:    All instances of:
        !             5:        if(!init) f_init();
        !             6:    have been removed. f_init() is called from main.c on startup in the new
        !             7:    libF77.a .
        !             8: 
        !             9: 01 Feb, 1980
        !            10:    Backspace now allows non-seek files to reset the EOF flag.
        !            11: 
        !            12: 20 Mar, 1980
        !            13:    The way SIGINT is handled in libF77/main.c has been changed.
        !            14:    If the signal is not SIG_DFL, it is left alone as otherwise the
        !            15:    program will be killed if run in the background and the user types DEL.
        !            16:    The signal trap that used to be in the I/O lib has been removed.
        !            17: 
        !            18: 20 Mar, 1980
        !            19:    The ANSI fortran standard requires that I/O routines return to the caller
        !            20:    on any error condition if iostat= is specified even if no err= or end=
        !            21:    trap is specified. The implication of this is that the program must
        !            22:    be prepared to deal with ALL I/O errors if iostat= is specified.
        !            23:    If only one trap is specified, end= for example, the program must test the
        !            24:    iostat variable for positive/non-zero after the I/O call since return
        !            25:    will occur on any error. This seems awkward and I've chosen to make this
        !            26:    feature optional. I am interested in other views on this.
        !            27:    
        !            28:    In the current version of the compiler (using the modified io.c),
        !            29:    iostat= is used only to return status information from
        !            30:    I/O calls but does not itself cause return on any I/O error. Only
        !            31:    the traps, err= and end=, will cause a return/branch, and only for
        !            32:    the specified trap(s).
        !            33:    
        !            34:    This feature has been made a compile time option in the current version
        !            35:    of (modified) io.c It implements the standard correctly if compiled
        !            36:    with -DKOSHER or -DIOSRETURN. Otherwise it executes as currently
        !            37:    implemented.
        !            38: 
        !            39: 18 Apr, 1980
        !            40:    As originally implemented the '$' specification caused a NULL to be
        !            41:    output (inplace of the \n) Actually NULL's should never appear in the
        !            42:    formatted output streams. Therefore in "sfe.c" in x_putc() and pr_put()
        !            43:    add      if (c)      before the instances of      putc(c,cf)
        !            44: 
        !            45: 12 May, 1980
        !            46:    Spaces (ASCII 040) do not have significance in FORMAT statements except
        !            47:    within strings. In order to accomodate old programs that may have
        !            48:    arbitrary occurances of spaces, all spaces are now ignored. Thus the
        !            49:    format ( 1 0 X , 1 2 F 1 0 . 4 / ) is accepted.
        !            50: 
        !            51: 12 May, 1980
        !            52:    A bug in handling partially filled "unformatted direct" records has been
        !            53:    fixed by ensuring that all records are complete when written. The bug was
        !            54:    that the last record of such a file would cause EOF if a read was attempted
        !            55:    for a full record. Existing files of this form should be "fixed" by
        !            56:    reading and rewriting the last record using the new version of libI77.a
        !            57: 
        !            58: 12 May, 1980
        !            59:    BACKSPACE will now open a default file (fort.N) if the specified logical
        !            60:    unit is not open. REWIND and other I/O already did this. CLOSE and
        !            61:    ENDFILE do not open a default file.
        !            62: 
        !            63: 07 Oct, 1980
        !            64:    List directed input now terminates properly on a slash and flushes to
        !            65:    either slash or newline, whichever comes first. List directed input now
        !            66:    properly converts wierd forms such as 3.-4 and 5+3. It now returns an
        !            67:    error if the repeat count is negative.
        !            68: 
        !            69:    Several type definitions were changed/added to accomodate 11/70's.
        !            70: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.