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28 Commits

Author SHA1 Message Date
Brett Cannon 0b03f10afb Remove three unneeded variable assignments. 
Found using Clang's static analyzer.
 2010-05-05 20:20:19 +00:00
Mark Dickinson 8cd0a66a0f dtoa.c fix from upstream that fixes incorrectly rounded results for certain subnormals that are also halfway cases. 2010-01-23 21:25:53 +00:00
Mark Dickinson fc5290458d Issue #7743: Add checks for zero inputs to the lshift and mult functions; 
this fixes the first bug described in issue #7743.
 2010-01-23 20:48:56 +00:00
Mark Dickinson adcda3400f Issue #7743: Fix a potential incorrect rounding bug in dtoa.c (2nd bug 
in issue 7743).
 2010-01-22 17:04:07 +00:00
Mark Dickinson ca6ea56718 Additional explanatory comments for _Py_dg_strtod. 2010-01-20 21:23:25 +00:00
Mark Dickinson 1942806013 Don't try to put a value into a NULL pointer. 2010-01-20 18:02:41 +00:00
Mark Dickinson 4141d65fb7 Various dtoa.c cleanups. 1. Despagghetify _Py_dg_strtod parsing code 
and exit points.  2. Simplify bigcomp comparison loop.  3. Don't set
ERANGE on _Py_dg_strtod underflow (it was set inconsistently anyway).
4. Remove unused dsign field from BCinfo struct.
 2010-01-20 17:36:31 +00:00
Mark Dickinson 9481c576cd Issue #7632: When Py_USING_MEMORY_DEBUGGER is defined, disable the 
private memory allocation scheme in dtoa.c, along with a piece of code
that caches powers of 5 for future use.  This makes it easier to
detect dtoa.c memory leaks with Valgrind or similar tools.

Patch by Stefan Krah.
 2010-01-17 20:57:56 +00:00
Mark Dickinson 23df3d270d Issue #7632: Fix a memory leak in _Py_dg_strtod. 2010-01-17 13:37:57 +00:00
Mark Dickinson 18a818bc63 Fix multiple uses of variable 'L' in _Py_dg_strtod, where one use requires an unsigned long and the other a signed long. See also r77421. 2010-01-16 18:06:17 +00:00
Mark Dickinson 811ff822f8 Issue #7632: Fix one more case of incorrect rounding for str -> float 
conversion (see bug 5 in the issue tracker).
 2010-01-16 17:57:49 +00:00
Mark Dickinson 476279f18b Issue #7632: Fix a serious wrong output bug for string -> float conversion. 
Also remove some now unused variables, and add comments clarifying the
possible outputs of the parsing section of _Py_dg_strtod.  Thanks
Eric Smith for reviewing.
 2010-01-16 10:44:00 +00:00
Mark Dickinson f8747c1f12 Issue 7632: fix incorrect rounding for long input strings with values very close to a power of 2. (See Bug 4 in the tracker discussion.) 2010-01-14 14:40:20 +00:00
Mark Dickinson 50b60c612e Issue 7632: fix a dtoa.c bug (bug 6) causing incorrect rounding. Tests to follow. 2010-01-14 13:14:49 +00:00
Mark Dickinson 03774fac62 Fix off-by-one error introduced in r77483. I have a test for this, but it currently fails due to a different dtoa.c bug; I'll add the test once that bug is fixed. 2010-01-14 13:02:36 +00:00
Mark Dickinson d2a9940acb More dtoa.c cleanup; remove the need for bc.dplen, bc.dp0 and bc.dp1. 2010-01-13 22:20:10 +00:00
Mark Dickinson 02139d74ba Fix buggy comparison: LHS of comparison was being treated as unsigned. 2010-01-13 22:15:53 +00:00
Mark Dickinson 6e0d3d67fb Simplify and annotate the bigcomp function, removing unused special cases. 2010-01-13 20:55:03 +00:00
Mark Dickinson 5818e01253 Clarify that sulp expects a nonnegative input, but that +0.0 is fine. 2010-01-13 19:02:37 +00:00
Mark Dickinson b26d56ac18 Add comments explaining the role of the bigcomp function in dtoa.c. 2010-01-13 18:21:53 +00:00
Mark Dickinson 5ff4f279e6 Issue #7632: Fix a bug in dtoa.c that could lead to incorrectly-rounded results. 2010-01-12 22:55:51 +00:00
Mark Dickinson 8efef5ce9f Issue #7632: Fix a problem with _Py_dg_strtod that could lead to 
crashes in debug builds, for certain long numeric strings
corresponding to subnormal values.
 2010-01-12 22:23:56 +00:00
Mark Dickinson 0ca7452794 Change a variable type to avoid signed overflow; replace repeated '19999' constant by a define. 2010-01-11 17:15:13 +00:00
Mark Dickinson 5a0b399aa9 Remove unused BCinfo fields and an unused macro. 2010-01-10 13:06:31 +00:00
Mark Dickinson 2bcd177270 Fix typo in comment. 2010-01-04 21:32:02 +00:00
Mark Dickinson 52462c3185 Remove temporary define from r75653 2009-10-24 13:31:41 +00:00
Mark Dickinson fd42f30991 Temporary define to avoid build failure 2009-10-24 12:17:24 +00:00
Mark Dickinson bb28285ea2 Issue #7117: Prepare for backport of py3k float repr. 
Add the Python/dtoa.c file containing the main algorithms;
add corresponding include file and include in Python.h;
include license information for Python/dtoa.c;
add dtoa.c and dtoa.h to Makefile.
 2009-10-24 12:13:30 +00:00