Uwe Bonnes schrieb:
>>>>>> "Louis" == Louis Lenders <[EMAIL PROTECTED]> writes:
>
> Louis> Hi, i filed a bug ( bug 4337) and looks like there's a bug in
> Louis> atof. Is there a difference between linux' atof and msvcrt's one?
> Louis> Even following simple program (from msdn) yields wrong results:
> Louis> // crt_atof.c #include <stdlib.h> #include <stdio.h>
>
> Louis> int main( void ) { char *s; double x; int i; long l;
>
> Louis> s = " -2309.12E-15"; /* Test of atof */ x = atof( s ); printf(
> Louis> "atof test: \"%s\"; float: %e\n", s, x );
>
> Louis> s = "7.8912654773d210"; /* Test of atof */ x = atof( s );
> Louis> printf( "atof test: \"%s\"; float: %e\n", s, x );
>
> Louis> s = " -9885 pigs"; /* Test of atoi */ i = atoi( s ); printf(
> Louis> "atoi test: \"%s\"; integer: %d\n", s, i );
>
> Louis> s = "98854 dollars"; /* Test of atol */ l = atol( s ); printf(
> Louis> "atol test: \"%s\"; long: %ld\n", s, l ); } the exponent value in
> Louis> float x are wrong. Thanks
>
>
> Not atof() is the cause of your bug, but printf().
> I entered your sample into the test suite to show the correct behaviour of
> wine's implementation of atof. The printf() test has already a todo for the
> incorrect exponent output.
quoted from msdn[1]:
---
The string argument to atof and _wtof has the following form:
[whitespace] [sign] [digits] [.digits] [ {d | D | e | E }[sign]digits
---
Which means that '7.8912654773d210' is the same as '7.8912654773e210'.
But on linux we have(quoted from 'man strtod'):
-----
A decimal number consists of a nonempty sequence of decimal digits pos-
sibly containing a radix character (decimal point, locale dependent,
usually ``.''), optionally followed by a decimal exponent. A decimal
exponent consists of an ``E'' or ``e'', followed by an optional plus or
minus sign, followed by a non-empty sequence of decimal digits, and
indicates multiplication by a power of 10.
----
It doesn't parse 'd' or 'D' as exponent.
Seems to be a "MS-only extension" to the standard :p
[1]
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_atof.2c_.atoi.2c_._atoi64.2c_.atol.asp
