Re: [Qemu-devel] [PATCH 1/4] strtosz(): use unsigned char and switch to qemu_isspace()

[Markus Armbruster <armbru@redhat.com>]

Jes Sorensen <Jes.Sorensen@redhat.com> writes:

> On 01/24/11 17:10, Markus Armbruster wrote:
>> Jes.Sorensen@redhat.com writes:
>> 
>>> From: Jes Sorensen <Jes.Sorensen@redhat.com>
>>>
>>> isspace() behavior is undefined for signed char.
>>>
>>> Bug pointed out by Eric Blake, thanks!
>>>
>>> Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
>>> ---
>>>  cutils.c |    7 ++++---
>>>  1 files changed, 4 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/cutils.c b/cutils.c
>>> index 4d2e27c..a067cf4 100644
>>> --- a/cutils.c
>>> +++ b/cutils.c
>>> @@ -294,7 +294,8 @@ int fcntl_setfl(int fd, int flag)
>>>  int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix)
>>>  {
>>>      int64_t retval = -1;
>>> -    char *endptr, c, d;
>>> +    char *endptr;
>>> +    unsigned char c, d;
>>>      int mul_required = 0;
>>>      double val, mul, integral, fraction;
>>>  
>> 
>> I doubt this hunk is still needed.
>
> It isn't strictly due to qemu_toupper() but it is prettier to match the
> real behavior of pure toupper() anyway.

Frequent casting between signed and unsigned has been shown to cause
headaches in laboratory rats.