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ratfor(1) General Commands Manual ratfor(1)


ratfor77 - ratfor preprocessor for fortran77


ratfor [-l n] [-C] [-o output] input


user sets starting label n
specify output file, otherwise it is stdout
keep comments in (useful for compiler directives)


Ratfor has the following syntax:

prog:   stat

prog stat stat: if (...) stat
if (...) stat else stat
while (...) stat
repeat stat
repeat stat until (...)
for (...;...;...) stat
do ... stat
switch (intexpr) { case val[,val]: stmt ... default: stmt }
break n
next n
return (...)
digits stat
{ prog } or [ prog ] or $( prog $)
anything unrecognizable

where stat is any Fortran or Ratfor statement, and intexpr is an expression that resolves into an integer value. A statement is terminated by an end-of-line or a semicolon. The following translations are also performed.

< .lt. <= .le.
== .eq.
!= .ne. ^= .ne. ~= .ne.
>= .ge. > .gt.
| .or. & .and.
! .not. ^ .not. ~ .not.

Integer constants in bases other that decimal may be specified as n%dddd... where n is a decimal number indicating the base and dddd... are digits in that base. For bases > 10, letters are used for digits above 9. Examples: 8%77, 16%2ff, 2%0010011. The number is converted the equivalent decimal value using multiplication; this may cause sign problems if the number has too many digits.

String literals ("..." or '...') can be continued across line boundaries by ending the line to be continued with an underline. The underline is not included as part of the literal. Leading blanks and tabs on the next line are ignored; this facilitates consistent indentation.

include file

will include the named file in the input.

define (name,value) or
define name value

defines name as a symbolic parameter with the indicated value. Names of symbolic parameters may contain letters, digits, periods, and underline character but must begin with a letter (e.g. B.FLAG). Upper case is not equivalent to lower case in parameter names.

string name "character string" or
string name(size) "character string"

defines name to be an integer array long enough to accomodate the ascii codes for the given character string, one per word. The last word of name is initialized to the symbolic parameter EOS, and indicates the end of string.


ratfor, fortran, preprocessor, fortran77, ratfor77, spp