rober@attila.WEITEK.COM (Don Rober) (08/25/90)
Does anyone know of an ANSI-to-K&R translator? Specifically, I need to
de-prototype thousands of lines of code and any mechanical translator
is less error-prone than I.
--
----------------------------------------------------------------------------
Don Rober UUCP: {pyramid}!weitek!rober
Weitek Corporation 1060 East Arques Sunnyvale, CA 94086ok@goanna.cs.rmit.oz.au (Richard A. O'Keefe) (08/26/90)
In article <907@attila.WEITEK.COM>, rober@attila.WEITEK.COM (Don Rober) writes: > Does anyone know of an ANSI-to-K&R translator? Specifically, I need to > de-prototype thousands of lines of code and any mechanical translator > is less error-prone than I. There is a set of patches to GCC, which you can get from the same places (such as prep.ai.mit.edu) that you can get GCC, that yield protoize/deprotoize or whatever they are called. I have a couple of m4 files I have been playing with, in order to go the other way. The rest of this message is a script. The m4 files have been written for the least capable version of m4 I could find. % cat classic.m4 # definitions for "Classic C" define(PROTO,`()') define(M4w, `ifelse(index($1,` '),-1,ifelse(index($1,`*'),-1,$1, `M4w(substr($1,incr(index($1,`*'))))'), `M4w(substr($1,incr(index($1,` '))))')')dnl define(_, `ifelse( $1,,`()', $2,,`(M4w($1)) $1;', $3,,`(M4w($1)`,' M4w($2)) $1; $2;', $4,,`(M4w($1)`,' M4w($2)`,' M4w($3)) $1; $2; $3;', $5,,`(M4w($1)`,' M4w($2)`,' M4w($3)`,' M4w($4)) $1; $2; $3; $4;', $6,,`(M4w($1)`,' M4w($2)`,' M4w($3)`,' M4w($4)`,' M4w($5)) $1; $2; $3; $4; $5;', $7,,`(M4w($1)`,' M4w($2)`,' M4w($3)`,' M4w($4)`,' M4w($5)`,' M4w($6)) $1; $2; $3; $4; $5; $6;', $8,,`(M4w($1)`,' M4w($2)`,' M4w($3)`,' M4w($4)`,' M4w($5)`,' M4w($6)`,' M4w($7)) $1; $2; $3; $4; $5; $6; $7;', $9,,`(M4w($1)`,' M4w($2)`,' M4w($3)`,' M4w($4)`,' M4w($5)`,' M4w($6)`,' M4w($7)`,' M4w($8)) $1; $2; $3; $4; $5; $6; $7; $8;', `errprint(Too many arguments)')')dnl % % cat ansi.m4 # definitions for "ANSI C" define(PROTO,`$1') define(_, `ifelse( $1,,`()', $2,,`($1)', $3,,`($1`,' $2)', $4,,`($1`,' $2`,' $3)', $5,,`($1`,' $2`,' $3`,' $4)', $6,,`($1`,' $2`,' $3`,' $4`,' $5)', $7,,`($1`,' $2`,' $3`,' $4`,' $5`,' $6)', $8,,`($1`,' $2`,' $3`,' $4`,' $5`,' $6`,' $7)', $9,,`($1`,' $2`,' $3`,' $4`,' $5`,' $6`,' $7`,' $8)', `errprint(Too many arguments)')')dnl % cat test.c # Example of a source file extern int scanf PROTO((char *, ...)); extern int printf PROTO((char *, ...)); extern void exit PROTO((int)); main _(int argc, char **argv) /* note the space before the underscore */ { double x; while (scanf("%lg", &x) == 1) printf("%g\n", x); exit(1); } % /bin/m4 classic.m4 test.c # produce the "Classic C" version of test.c extern int scanf (); extern int printf (); extern void exit (); main (argc, argv) int argc; char **argv; { double x; while (scanf("%lg", &x) == 1) printf("%g\n", x); exit(1); } % /bin/m4 ansi.m4 test.c # produce the "ANSI C" version of test.c extern int scanf (char *, ...); extern int printf (char *, ...); extern void exit (int); main (int argc, char **argv) { double x; while (scanf("%lg", &x) == 1) printf("%g\n", x); exit(1); } % exit Not foolproof, but rather fun. -- The taxonomy of Pleistocene equids is in a state of confusion.
peter@ficc.ferranti.com (Peter da Silva) (08/29/90)
The one problem with M4 is that it's got this annoying tendency to do replacements that aren't intended (what happens if you have a variable called "dnl"?). When I did a version of MACRO (m4 in Ratfor) for RSX, I made all the builtind start with "$". -- Peter da Silva. `-_-' +1 713 274 5180. 'U` peter@ferranti.com
thomas@uplog.se (Thomas Tornblom) (08/29/90)
In article <FRI5NYC@xds13.ferranti.com> peter@ficc.ferranti.com (Peter da Silva) writes:
The one problem with M4 is that it's got this annoying tendency to do
replacements that aren't intended (what happens if you have a variable
called "dnl"?). When I did a version of MACRO (m4 in Ratfor) for RSX, I
made all the builtind start with "$".
--
Peter da Silva. `-_-'
+1 713 274 5180. 'U`
peter@ferranti.com
If you're using system V m4 you can always redefine the m4 builtins to
something harmless:
define(`_m4_dnl', defn(`dnl'))dnl
undefine(`dnl')_m4_dnl
--
Real life: Thomas Tornblom Email: thomas@uplog.se
Snail mail: TeleLOGIC Uppsala AB Phone: +46 18 189406
Box 1218 Fax: +46 18 132039
S - 751 42 Uppsala, Swedenok@goanna.cs.rmit.oz.au (Richard A. O'Keefe) (08/29/90)
In article <FRI5NYC@xds13.ferranti.com>, peter@ficc.ferranti.com (Peter da Silva) writes: > The one problem with M4 is that it's got this annoying tendency to do > replacements that aren't intended (what happens if you have a variable > called "dnl"?). The M4 I *really* use is Ozan Yigit's PD version, modelled on Sys V M4. In System V M4 and the PD one, you can say define(M4__dnl,defn(`dnl'))undefine(`dnl')M4__dnl The files I posted are the totally stripped down BSD versions. -- You can lie with statistics ... but not to a statistician.
emcmanus@cs.tcd.ie (Eamonn McManus) (08/31/90)
peter@ficc.ferranti.com (Peter da Silva) writes: >The one problem with M4 is that it's got this annoying tendency to do >replacements that aren't intended (what happens if you have a variable >called "dnl"?). When I did a version of MACRO (m4 in Ratfor) for RSX, I >made all the builtind start with "$". Some versions of m4, System V for example, provide a builtin `defn'. The manual says: defn returns the quoted definition of its argument(s). It is useful for renaming macros, especially built-ins. Unfortunately, this is a lie. `defn' doesn't expand to anything if given a builtin as its argument. If it worked, you could rename all the m4 built-ins to begin with the string `m4' or some such. It ought to be quite easy to make defn work properly, for instance by having defn(`somebuiltin') expand to `m4builtin(something)'. Thus defn(`define') might expand to m4builtin(1), and m4builtin(1) would behave exactly like define: one could write m4builtin(1)(`foo', `bar'). Then only the word `m4builtin' would be reserved by m4. Other builtins could be renamed by a sequence like: define(`m4define', defn(`define')) undefine(`define') -- Eamonn McManus <emcmanus@cs.tcd.ie> <emcmanus%cs.tcd.ie@cunyvm.cuny.edu> Fingers are for fuguing.
emcmanus@cs.tcd.ie (Eamonn McManus) (09/03/90)
I wrote about System V m4:
> `defn' doesn't expand to anything if given a builtin as its argument.
and of course I was wrong. In fact it expands to a control character with
bit 7 set, which is why I hadn't seen anything when I'd tried it
interactively. This is a rather ugly approach, but I suppose it's faster
than what I suggested.
--
Eamonn McManus <emcmanus@cs.tcd.ie> <emcmanus%cs.tcd.ie@cunyvm.cuny.edu>
Fingers are for fuguing.