diff options
Diffstat (limited to 'generic/tclIOUtil.c')
| -rw-r--r-- | generic/tclIOUtil.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c index 92203cc..c60cd8e 100644 --- a/generic/tclIOUtil.c +++ b/generic/tclIOUtil.c @@ -17,7 +17,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclIOUtil.c,v 1.126 2005/11/27 02:33:49 das Exp $ + * RCS: @(#) $Id: tclIOUtil.c,v 1.127 2005/12/15 04:08:33 das Exp $ */ #include "tclInt.h" @@ -76,8 +76,19 @@ Tcl_Stat( # define OUT_OF_RANGE(x) \ (((Tcl_WideInt)(x)) < Tcl_LongAsWide(LONG_MIN) || \ ((Tcl_WideInt)(x)) > Tcl_LongAsWide(LONG_MAX)) +#if defined(__GNUC__) && __GNUC__ >= 2 +/* + * Workaround gcc warning of "comparison is always false due to limited range of + * data type" in this macro by checking max type size, and when necessary ANDing + * with the complement of ULONG_MAX instead of the comparison: + */ +# define OUT_OF_URANGE(x) \ + ((((Tcl_WideUInt)(~ (__typeof__(x)) 0)) > (Tcl_WideUInt)ULONG_MAX) && \ + (((Tcl_WideUInt)(x)) & ~(Tcl_WideUInt)ULONG_MAX)) +#else # define OUT_OF_URANGE(x) \ (((Tcl_WideUInt)(x)) > (Tcl_WideUInt)ULONG_MAX) +#endif /* * Perform the result-buffer overflow check manually. |