strtod is not C99-compatible

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strtod is not C99-compatible
\ Ramiro Polla (1 May 2008)
. \ Brian Dessent (1 May 2008)
. . \ Ramiro Polla (1 May 2008)
. . . \ Ramiro Polla (1 May 2008)
. . . . \ Keith Marshall (2 May 2008)
. . . . . \ Ramiro Polla (2 May 2008)
. . . . . . \ Keith Marshall (2 May 2008)
. . . . . . . \ Chris Sutcliffe (3 May 2008)
. . . . . . . . \ Danny Smith (4 May 2008)
. . . . . . . . . \ Ramiro Polla (6 May 2008)
. . \ Charles Wilson (1 May 2008)
. \ Brian Dessent (1 May 2008)

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Subject:	strtod is not C99-compatible
Group:	Mingw-users
From:	Ramiro Polla
Date:	1 May 2008

Hello,

According to [0], strtod() should be able to parse hexadecimal numbers.
But in Windows[1], it doesn't.

This simple test program:
#include <stdlib.h>
#include <stdio.h>

int main()
{
const char *string = "0x00800000";
char *end;
double value;

value = strtod(string, &end);

printf("string \"%s\"\n", string);
printf("end \"%s\"\n", end);
printf("value %f\n", value);

return 0;
}

should print:
string "0x00800000"
end ""
value 8388608.000000

but instead it prints:
string "0x00800000"
end "x00800000"
value 0.000000

Is it possible that a function to replace strtod() with a C99-compliant
implementation be made the same way it was done with snprintf? And then
one would have to call _strtod to get the original MSVCRT version.

Ramiro Polla
[0] http://www.opengroup.org/onlinepubs/000095399/functions/strtod.html
[1] http://msdn.microsoft.com/en-us/library/kxsfc1ab(vs.71).aspx

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