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| author | dgp <dgp@users.sourceforge.net> | 2006-07-26 21:56:34 (GMT) |
|---|---|---|
| committer | dgp <dgp@users.sourceforge.net> | 2006-07-26 21:56:34 (GMT) |
| commit | 420e232f0fb6221fb1473b08681d9b2a76804690 (patch) | |
| tree | 725277dd32485ba803542bc6c6d9cfbdf15557c8 /generic/tclExecute.c | |
| parent | 7bef47d44562d1078457fd681f39a40e54d43897 (diff) | |
| download | tcl-420e232f0fb6221fb1473b08681d9b2a76804690.zip tcl-420e232f0fb6221fb1473b08681d9b2a76804690.tar.gz tcl-420e232f0fb6221fb1473b08681d9b2a76804690.tar.bz2 | |
* generic/tclExecute.c: Corrected flawed overflow detection in
* tests/expr.test: INST_EXPON that caused [expr 2**64]
to return 0 instead of the same value as [expr 1<<64].
Diffstat (limited to 'generic/tclExecute.c')
| -rw-r--r-- | generic/tclExecute.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/generic/tclExecute.c b/generic/tclExecute.c index 0870219..5e12c95 100644 --- a/generic/tclExecute.c +++ b/generic/tclExecute.c @@ -12,7 +12,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclExecute.c,v 1.239 2006/07/21 10:47:18 msofer Exp $ + * RCS: @(#) $Id: tclExecute.c,v 1.240 2006/07/26 21:56:34 dgp Exp $ */ #include "tclInt.h" @@ -4858,7 +4858,7 @@ TclExecuteByteCode( w2 /= 2; for (; w2>Tcl_LongAsWide(1) ; w1*=w1,w2/=2) { wasNegative = (wResult < 0); - if (w1 < 0) { + if (w1 <= 0) { goto overflow; } if (w2 & 1) { @@ -4869,6 +4869,9 @@ TclExecuteByteCode( } } wasNegative = (wResult < 0); + if (w1 <= 0) { + goto overflow; + } wResult *= w1; if (wasNegative != (wResult < 0)) { goto overflow; |