24ddc71998-03-28Henrik Grubbström (Grubba) #include "global.h"
fc33451997-10-02Fredrik Hübinette (Hubbe) #include "cyclic.h"
5aad932002-08-15Marcus Comstedt RCSID("$Id: cyclic.c,v 1.6 2002/08/15 14:49:20 marcus Exp $");
24ddc71998-03-28Henrik Grubbström (Grubba) 
fc33451997-10-02Fredrik Hübinette (Hubbe) #define CYCLIC_HASH_SIZE 4711 CYCLIC *cyclic_hash[CYCLIC_HASH_SIZE];
545ca81997-10-07Fredrik Hübinette (Hubbe) static void low_unlink_cyclic(CYCLIC *c)
fc33451997-10-02Fredrik Hübinette (Hubbe) {
c7241b2000-08-10Henrik Grubbström (Grubba)  size_t h;
fc33451997-10-02Fredrik Hübinette (Hubbe)  CYCLIC **p;
c7241b2000-08-10Henrik Grubbström (Grubba)  h=(ptrdiff_t)c->id;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33;
c7241b2000-08-10Henrik Grubbström (Grubba)  h|=(ptrdiff_t)c->a;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33;
c7241b2000-08-10Henrik Grubbström (Grubba)  h|=(ptrdiff_t)c->b;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33;
c7241b2000-08-10Henrik Grubbström (Grubba)  h|=(ptrdiff_t)c->th;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33; h%=CYCLIC_HASH_SIZE; for(p=cyclic_hash+h;*p;p=&(p[0]->next)) { if(c == *p) { *p=c->next; return; } }
5aad932002-08-15Marcus Comstedt  Pike_fatal("Unlink cyclic on lost cyclic struct.\n");
fc33451997-10-02Fredrik Hübinette (Hubbe) }
545ca81997-10-07Fredrik Hübinette (Hubbe) void unlink_cyclic(CYCLIC *c) { UNSET_ONERROR(c->onerr); low_unlink_cyclic(c); }
fc33451997-10-02Fredrik Hübinette (Hubbe) void *begin_cyclic(CYCLIC *c, void *id, void *th, void *a, void *b) {
c7241b2000-08-10Henrik Grubbström (Grubba)  size_t h;
14bb592000-05-06Fredrik Hübinette (Hubbe)  void *ret=0;
fc33451997-10-02Fredrik Hübinette (Hubbe)  CYCLIC *p;
c7241b2000-08-10Henrik Grubbström (Grubba)  h=(ptrdiff_t)id;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33;
c7241b2000-08-10Henrik Grubbström (Grubba)  h|=(ptrdiff_t)a;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33;
c7241b2000-08-10Henrik Grubbström (Grubba)  h|=(ptrdiff_t)b;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33;
c7241b2000-08-10Henrik Grubbström (Grubba)  h|=(ptrdiff_t)th;
fc33451997-10-02Fredrik Hübinette (Hubbe)  h*=33; h%=CYCLIC_HASH_SIZE; for(p=cyclic_hash[h];p;p=p->next)
14bb592000-05-06Fredrik Hübinette (Hubbe)  {
fc33451997-10-02Fredrik Hübinette (Hubbe)  if(a == p->a && b==p->b && id==p->id)
14bb592000-05-06Fredrik Hübinette (Hubbe)  { ret=p->ret; break; } }
fc33451997-10-02Fredrik Hübinette (Hubbe) 
c7241b2000-08-10Henrik Grubbström (Grubba)  c->ret=(void *)(ptrdiff_t)1;
fc33451997-10-02Fredrik Hübinette (Hubbe)  c->a=a; c->b=b; c->id=id; c->th=th; c->next=cyclic_hash[h]; cyclic_hash[h]=c;
545ca81997-10-07Fredrik Hübinette (Hubbe)  SET_ONERROR(c->onerr, low_unlink_cyclic, c);
14bb592000-05-06Fredrik Hübinette (Hubbe)  return ret;
fc33451997-10-02Fredrik Hübinette (Hubbe) }