term% cat index.txt STRUCT(1) General Commands Manual STRUCT(1)
NAME
struct - structure Fortran programs
SYNOPSIS
struct [ option ] ... file
DESCRIPTION
Struct translates the Fortran program specified by file (standard input
default) into a Ratfor program. Wherever possible, Ratfor control con‐
structs 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 (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 speci‐
fied by a c, C, or * in column 1, and continuation lines are
specified by a nonzero, nonblank character in column 6. Nor‐
mally input is in the form accepted by f77(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 generalized 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.
-tn Make the nonzero integer n the lowest valued label in the output
program (default 10).
-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 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), ratfor(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 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 .
STRUCT(1)