Aucbvax.2275
fa.unix-wizards
utzoo!duke!decvax!ucbvax!saks@LL-XN
Tue Jul 14 11:41:47 1981
lint and enumerated types
From: Joft Saks <SAKS@LL-XN>
For some reason or another, our lint does not seem to like some things about
enumerated types. I have included below two (unrelated) C-source files which
use enumerated types.
Note that in the first, I have used the feature which allows one to set a
particular value in the enum - list. (Let's forget for a moment any qualms
we may have about said feature.) Applications of lint to this program yield
the following message:
"puterr.c", line 35: warning: nonportable character comparison
Applications of lint to the second program yield the message:
stuff value used inconsistently "test.c"(12) :: "test.c"(20)
Ken Schroder (schroder at ll-asg) thinks older versions of lint may have trouble
with functions which return enumerated types. If anyone else has encountered
troubles, or has some ideas/suggestions/comments/anything at all useful to say
about this, please let me know. Many thanks.
--------------------------------------------------------------------------------
puterr.c
--------
/*
* print an error message
*/
#include <STDIO.H>
typedef enum
{
ERRNONE = -1,
ERRNOTFOUND,
ERRNOTPLAIN,
ERRDIRACC,
ERRNAMELONG,
ERRREADACC,
ERRWRITEACC,
ERRCHNGSACC,
ERRDIFFEXEC
}
tpserror;
tpserror puterr(e, progname, s)
tpserror e;
char *progname, *s;
{
static char *format[] =
{
"%s: can't find %s\n",
"%s: %s is special file or directory\n",
"%s: can't access containing directory %s\n",
"%s: file name too long %s\n",
"%s: no read privileges on %s\n",
"%s: no write privileges on %s\n",
"%s: can't access changes file for %s\n",
"%s: can't execute 'diff' for %s\n"
};
if (e != ERRNONE)
fprintf(stderr, format[(int)e], progname, s);
return (e);
}
--------------------------------------------------------------------------------
test.c:
-------
#include <STDIO.H>
typedef enum
{
RED,
GREEN,
BLUE
}
color;
color stuff()
{
return (RED);
}
main()
{
if (stuff() == RED)
fprintf(stderr, "stuff == RED\n");
else
fprintf(stderr, "stuff != RED\n");
exit(0);
}
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