ref: c8b187f9db503465460d8bafa2d7a758bbcf59ca
dir: /liblogfs/groupset.c/
#include "logfsos.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 == nil) 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; }