Johannes Schindelin <johannes.schinde...@gmx.de> writes:
> However, if we had to change the lookup such that it uses an array always,
> we would have to introduce a function to initialize the struct, always, in
> particular we would have to find a place to call that initialization
> function in, say, builtin/fsck.c (actually, in every code path that calls
> into the fsck machinery).
You would need to call a function to "initialize" the table if you
support customization by reading the configuration files anyway. I
am not sure why you think finding such a place is hard. Puzzled.
Also I suspect that you can tell the compiler to initialize the
array in place with default values, perhaps like this?
-- >8 --
#include <stdio.h>
/* sorted by the default severity (lowest impact first) */
#define EVENT_LIST(F) \
F(EVENT_A), \
F(EVENT_B), \
F(EVENT_C), \
F(EVENT_D)
#define ID_(event) ID_ ## event
enum event_id {
EVENT_LIST(ID_)
};
enum severity_level {
severity_info, severity_warn, severity_error
};
/* below this one are INFO */
#define FIRST_WARN_EVENT_ID ID_EVENT_B
/* below this one are WARN */
#define FIRST_ERROR_EVENT_ID ID_EVENT_C
#define STRING_(s) #s
#define DESC_(event) \
{ \
ID_ ## event, \
STRING_(event), \
(ID_ ## event < FIRST_WARN_EVENT_ID \
? severity_info \
: ID_ ## event < FIRST_ERROR_EVENT_ID \
? severity_warn \
: severity_error) \
}
struct event_config {
enum event_id id;
const char * name;
enum severity_level level;
} event[] = {
EVENT_LIST(DESC_)
};
int main(int ac, char **av)
{
int i;
for (i = 0; i < sizeof(event) / sizeof(event[0]); i++) {
printf("%d, %s, %d\n",
event[i].id, event[i].name, event[i].level);
}
return 0;
}
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