struct(1) — UTek W2.3



STRUCT(1)               COMMAND REFERENCE               STRUCT(1)



NAME
     struct - structure FORTRAN programs

SYNOPSIS
     struct [ -a ][ -b ][ -cn ][ -en ][ -i ][ -n ][ -s ][ -tn ]
     filename

DESCRIPTION
     Struct translates the FORTRAN program specified by filename
     (standard input default) into a Ratfor program.  Wherever
     possible, Ratfor control constructs replace the original
     FORTRAN.  Statement numbers appear only where still
     necessary.  Cosmetic changes are made, including changing
     Hollerith strings into quoted strings and relational
     operators into symbols (for example, .GT. into >).  The
     output is appropriately indented.

OPTIONS
     -a   Turn sequences of else-if's into a non-Ratfor switch of
          the form


          switch
               {    case pred1: code
                    case pred2: code
                    case pred3: code
                    default: code
               }

          The case predicates are tested in order; the code
          appropriate to only one case is executed.  This
          generalized form of switch statement does not occur in
          Ratfor.

     -b   Generate goto's instead of multilevel break statements.

     -cn  Increment successive labels in the output program by
          the nonzero integer n (default 1).

     -en  If n is 0 (default), place code within a loop only if
          it can lead to an iteration of the loop.  If n is
          nonzero, admit a small code segments to a loop if
          otherwise the loop would have exits to several places
          including the segment, and the segment can be reached
          only from the loop.  Small is near, but not equal to,
          the number of statements in the code segment.  Values
          of n under 10 are suggested.

     -i   Do not turn computed goto statements into switches.
          (Ratfor does not turn switches back into computed goto
          statements.)




Printed 10/17/86                                                1



STRUCT(1)               COMMAND REFERENCE               STRUCT(1)



     -n   Generate goto's instead of multilevel next statements.

     -s   Input is accepted in standard format; for example,
          comments are specified by a c, C, or * in column one,
          and continuation lines are specified by a nonzero,
          nonblank character in column six.  Normally input is in
          the form accepted by f77(1).

     -tn  Make the nonzero integer n the lowest valued label in
          the output program (default 10).

FILES
     /tmp/struct*             Temporary storage

     /usr/lib/struct/*        Various optional programs

CAVEATS
     Struct knows FORTRAN 66 syntax, but not full FORTRAN 77.

     If an input FORTRAN program contains identifiers, which are
     reserved words in Ratfor, the structured version of the
     program will not be a valid Ratfor program.

     The labels generated cannot go above 32767.

     If you get a goto without a target, try -e.

SEE ALSO
     f77(1).


























Printed 10/17/86                                                2

%%index%%
na:72,71;
sy:143,290;
de:433,629;
op:1062,1522;2728,580;
fi:3308,188;
ca:3496,461;
se:3957,95;
%%index%%000000000128

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