Update of bug #13805 (project freeciv):
Assigned to: None => mbook
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Follow-up Comment #1:
This patch is good, but you can reduce references to the
global variable 'settings' even more by using helper
functions to get a setting pointer from a setting id:
struct settings_s *setting_by_number(int id)
{
if (!(0 <= id && id < SETTINGS_NUM) {
return NULL;
}
return settings + id;
}
(The expression 'settings + id' is the same as
'&settings[id]', since ptr[x] == *(ptr + x)).
To get the "id" from a setting pointer, you use
pointer arithmetic again:
int setting_number(const struct setting_s *op)
{
if (!op) {
return -1;
}
return op - settings;
}
Some description of pointer arithmetic is here
http://en.wikipedia.org/wiki/Pointer_arithmetic#C_and_C.2B.2B
if you are unfamiliar with the concept.
Ideally we would want to completely remove the extern
reference to 'settings' from settings.h.
Good job using git. :)
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算数授業に行きましょうか。
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