Messages in this thread | | | Date | Mon, 19 Feb 2007 14:03:13 +0100 | From | "Francis Moreau" <> | Subject | Re: memparse(), simple_strtoul() prototypes... |
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Hi,
On 2/19/07, H. Peter Anvin <hpa@zytor.com> wrote: > Francis Moreau wrote: > > Hi, > > > > I must miss something... > > > > Looking at these prototypes > > > > unsigned long simple_strtoul(const char *cp, char **endp,unsigned int base) > > unsigned long long memparse (char *ptr, char **retptr) > > > > I'm really wondering why not all parameters are not all 'const'. None > > of these functions modify any pointer containts. And simple_strtoul() > > ends up doing sometghing like: > > > > if (endp) > > *endp = (char *)cp; > > > > Could anyone shed some light ? > > The C standard behaves like that, too, mostly because C doesn't have a > way to say "X is const iff Y is const" (unlike C++, btw.) >
hm, I don't get your point. I understand why we cast 'cp' into a (char *) but that's not my point. My point is why aren't all function parameters are not const ?
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