On 2014-09-08 20.52, Junio C Hamano wrote:
> There are these two functions in dir.c that has only a handful of
> callers outside:
>
> int strcmp_icase(const char *a, const char *b);
> int strncmp_icase(const char *a, const char *b, size_t count);
>
> How many of you would think these are about comparing two strings in
> a case-insensitive way?
>
> If you raised your hand (like I did), you were wrong. These do
> comparison case-insensitively only on a case-insensitive filesystem,
> and hence calling it makes sense only for pathnames you grabbed out
> of the filesystem via readdir() (or the user gave us, intending to
> name paths).
>
> To avoid confusion, I think they should be renamed to stress the
> fact that these are about comparing *PATHS*. As I always say, I am
> bad at naming things and good suggestions are appreciated.
>
> FYI, there are names I thought about and haven't managed to convince
> myself that they are good.
>
> A good name for the non-n variant may be "compare_paths()", but that
> is used in "combine-diff.c". "compare_pathnames()" may be a
> compromise.
>
> However, either of these makes it hard to come up with a
> corresponding name for the "n" (counted) variant. The best I could
> do was "compare_pathnames_counted()", but a nice similarity to
> strcmp()/strncmp() pair is lost.
>
> pathnamecmp()/pathnamencmp() perhaps?
>
> I dunno.
And then we have this in name-hash.c:
(Which may explain the "icase" suffix ?)
static int same_name(const struct cache_entry *ce, const char *name, int namelen, int icase)
{
int len = ce_namelen(ce);
/*
* Always do exact compare, even if we want a case-ignoring comparison;
* we do the quick exact one first, because it will be the common case.
*/
if (len == namelen && !memcmp(name, ce->name, len))
return 1;
if (!icase)
return 0;
return slow_same_name(name, namelen, ce->name, len);
}
-----------
static int slow_same_name(const char *name1, int len1, const char *name2, int len2)
{
if (len1 != len2)
return 0;
while (len1) {
unsigned char c1 = *name1++;
unsigned char c2 = *name2++;
len1--;
if (c1 != c2) {
c1 = toupper(c1);
c2 = toupper(c2);
if (c1 != c2)
return 0;
}
}
return 1;
}
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