static bool string_sort_predicate(const wcstring& d1, const wcstring& d2)
{
return wcsfilecmp(d1.c_str(), d2.c_str()) < 0;
}
int wcsfilecmp( const wchar_t *a, const wchar_t *b )
{
CHECK( a, 0 );
CHECK( b, 0 );
if( *a==0 )
{
if( *b==0)
return 0;
return -1;
}
if( *b==0 )
{
return 1;
}
int secondary_diff=0;
if( iswdigit( *a ) && iswdigit( *b ) )
{
wchar_t *aend, *bend;
long al;
long bl;
int diff;
errno = 0;
al = wcstol( a, &aend, 10 );
bl = wcstol( b, &bend, 10 );
if( errno )
{
/*
Huuuuuuuuge numbers - fall back to regular string comparison
*/
return wcscmp( a, b );
}
diff = al - bl;
if( diff )
return diff>0?2:-2;
secondary_diff = (aend-a) - (bend-b);
a=aend-1;
b=bend-1;
}
else
{
int diff = towlower(*a) - towlower(*b);
if( diff != 0 )
return (diff>0)?2:-2;
secondary_diff = *a-*b;
}
int res = wcsfilecmp( a+1, b+1 );
if( abs(res) < 2 )
{
/*
No primary difference in rest of string.
Use secondary difference on this element if found.
*/
if( secondary_diff )
{
return secondary_diff>0?1:-1;
}
}
return res;
}
/**
Wrapper for wcsfilecmp
*/
static int str_cmp( const void *a, const void *b )
{
wchar_t *c= *((wchar_t **)a);
wchar_t *d= *((wchar_t **)b);
return wcsfilecmp( c, d );
}