ANSI <--> K&R conversion utilities -- WANTED
Marshall Cline
cline at sun.soe.clarkson.edu
Tue May 30 07:10:59 AEST 1989
In all likelihood we'll all be living in the transition from K&R to ANSI-C
for a long while. Like most of us (probably), I've written a macro package
that converts prototypes for ANSI/K&R compatibility. However this is only
a partial fix. What I'd really like is a real program that filters a K&R
module and spits out an ANSI module (and another filter for the vise versa
operation). I can see a number of things this/these filter[s] would need
to do, including:
(1) Convert between K&R & ANSI prototypes in function _DEFINITIONS_. Ex:
ANSI: double myfunct(int i, int j) {...
K&R: double myfunct(i, j) {int i, j; ...
(2) Convert between K&R & ANSI prototypes in function _DECLARATIONS_. Ex:
ANSI: double myfunct(int i, int j);
K&R: double myfunct();
(3) In the case of "int" functions, many ANSI prototypes would have to be
added to the code before they are called (starting to get messy). Ex:
if "myfunct(x, y)" is called in the K&R code but isn't declared
previously, it could be assumed to return an "int", and its parameter
types could presumably be figured out, resulting in an ANSI prototype:
int myfunct(foo_t param1, bar_t param2);
(4) When converting from ANSI to K&R, the "automatic cast" facilities
provided by the prototypes would have to be changed to "explicit casts".
Ex: If "myfunct()" accepts a "long", and "i" is an "int", then the
ANSI code "myfunct(i)" would have to be translated to "myfunct((long)i)"
for the K&R compilers.
(5) In the reverse of (4), explicit casts to parameter types might be
removable when K&R code is translated to ANSI. See example just above.
(6) The names of the <standard> header files could be changed/added/removed.
(7) The variable argument schemes are different, so the code associated with
<varargs.h> and <stdarg.h> conversions could be made.
(8) ???Other required features???
Anyone written anything like this/these?
E-mail responses & I'll post a summary if there's enuf interest.
Marshall
--
________________________________________________________________
Marshall P. Cline ARPA: cline at sun.soe.clarkson.edu
ECE Department UseNet: uunet!sun.soe.clarkson.edu!cline
Clarkson University BitNet: BH0W at CLUTX
Potsdam, NY 13676 AT&T: (315) 268-6591
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