32v 1m struct

STRUCT(1) UNIX Programmer's Manual STRUCT(1)

NAME

    struct - structure Fortran programs

SYNOPSIS

    struct [ option ] ...  file

DESCRIPTION

    _S_t_r_u_c_t translates the Fortran program specified by _f_i_l_e
    (standard input default) into a Ratfor program.  Wherever
    possible, Ratfor control constructs replace the original
    Fortran.  Statement numbers appear only where still neces-
    sary.  Cosmetic changes are made, including changing Holler-
    ith strings into quoted strings and relational operators
    into symbols (.e.g. ".GT." into ">").  The output is
    appropriately indented.

    The following options may occur in any order.

    -s   Input is accepted in standard format, i.e.  comments
         are specified by a c, C, or * in column 1, and con-
         tinuation lines are specified by a nonzero, nonblank
         character in column 6.  Normally input is in the form
         accepted by _f_7_7(1)

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

    -a   Turn sequences of else ifs 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 gen-
         eralized form of switch statement does not occur in
         Ratfor.

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

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

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

    -c_n  Increment successive labels in the output program by

         the nonzero integer _n (default 1).

    -e_n  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 oth-
         erwise the loop would have exits to several places
         including the segment, and the segment can be reached
         only from the loop.  `Small' is close to, but not equal
         to, the number of statements in the code segment.
         Values of n under 10 are suggested.

FILES

    /tmp/struct*
    /usr/lib/struct/*

SEE ALSO

    f77(1)

BUGS

    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 pro-
    gram will not be a valid Ratfor program.
    The labels generated cannot go above 32767.
    If you get a goto without a target, try -e .