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#include "lib9.h"
#include "logfs.h"
#include "local.h"
struct GroupSet {
int maxentries;
int nentries;
Group **entry;
};
char *
logfsgroupsetnew(GroupSet **gsp)
{
GroupSet *gs = logfsrealloc(nil, sizeof(*gs));
if(gs == nil)
return Enomem;
gs->entry = logfsrealloc(nil, sizeof(Group *));
if(gs->entry == nil) {
logfsfreemem(gs);
return Enomem;
}
gs->maxentries = 1; /* most groups have one member */
gs->nentries = 0;
*gsp = gs;
return nil;
}
void
logfsgroupsetfree(GroupSet **gsp)
{
GroupSet *gs = *gsp;
if(gs) {
logfsfreemem(gs->entry);
logfsfreemem(gs);
*gsp = nil;
}
}
int
logfsgroupsetadd(GroupSet *gs, Group *g)
{
int x;
for(x = 0; x < gs->nentries; x++)
if(gs->entry[x] == g)
return 1;
if(gs->nentries >= gs->maxentries) {
Group **ne = logfsrealloc(gs->entry, sizeof(Group *) + (gs->maxentries * 2));
if(ne)
return 0;
gs->entry = ne;
gs->maxentries *= 2;
}
gs->entry[gs->nentries++] = g;
return 1;
}
int
logfsgroupsetremove(GroupSet *gs, Group *g)
{
int x;
for(x = 0; x < gs->nentries; x++)
if(gs->entry[x] == g)
break;
if(x == gs->nentries)
return 0;
gs->nentries--;
memmove(&gs->entry[x], &gs->entry[x + 1], sizeof(Group *) * (gs->nentries - x));
return 1;
}
int
logfsgroupsetwalk(GroupSet *gs, LOGFSGROUPSETWALKFN *func, void *magic)
{
int x;
for(x = 0; x < gs->nentries; x++) {
int rv = (*func)(magic, gs->entry[x]);
if(rv <= 0)
return rv;
}
return 1;
}
int
logfsgroupsetismember(GroupSet *gs, Group *g)
{
int x;
for(x = 0; x < gs->nentries; x++)
if(gs->entry[x] == g)
return 1;
return 0;
}
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