protocol.c

   1 #include "quakedef.h"
   2
   3 // this is 88 bytes (must match entity_state_t in protocol.h)
   4 entity_state_t defaultstate =
   5 {
   6         // ! means this is not sent to client
   7         0,//double time; // ! time this state was built (used on client for interpolation)
   8         {0,0,0},//float netcenter[3]; // ! for network prioritization, this is the center of the bounding box (which may differ from the origin)
   9         {0,0,0},//float origin[3];
  10         {0,0,0},//float angles[3];
  11         0,//int effects;
  12         0,//unsigned int customizeentityforclient; // !
  13         0,//unsigned short number; // entity number this state is for
  14         0,//unsigned short modelindex;
  15         0,//unsigned short frame;
  16         0,//unsigned short tagentity;
  17         0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
  18         0,//unsigned short viewmodelforclient; // !
  19         0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
  20         0,//unsigned short nodrawtoclient; // !
  21         0,//unsigned short drawonlytoclient; // !
  22         0,//unsigned short traileffectnum;
  23         {0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
  24         ACTIVE_NOT,//unsigned char active; // true if a valid state
  25         0,//unsigned char lightstyle;
  26         0,//unsigned char lightpflags;
  27         0,//unsigned char colormap;
  28         0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
  29         255,//unsigned char alpha;
  30         16,//unsigned char scale;
  31         0,//unsigned char glowsize;
  32         254,//unsigned char glowcolor;
  33         0,//unsigned char flags;
  34         0,//unsigned char internaleffects; // INTEF_FLAG1QW and so on
  35         0,//unsigned char tagindex;
  36         {32, 32, 32},//unsigned char colormod[3];
  37         {32, 32, 32},//unsigned char glowmod[3];
  38 };
  39
  40 // LadyHavoc: I own protocol ranges 96, 97, 3500-3599
  41
  42 struct protocolversioninfo_s
  43 {
  44         int number;
  45         protocolversion_t version;
  46         const char *name;
  47 }
  48 protocolversioninfo[] =
  49 {
  50         { 3504, PROTOCOL_DARKPLACES7 , "DP7"},
  51         { 3503, PROTOCOL_DARKPLACES6 , "DP6"},
  52         { 3502, PROTOCOL_DARKPLACES5 , "DP5"},
  53         { 3501, PROTOCOL_DARKPLACES4 , "DP4"},
  54         { 3500, PROTOCOL_DARKPLACES3 , "DP3"},
  55         {   97, PROTOCOL_DARKPLACES2 , "DP2"},
  56         {   96, PROTOCOL_DARKPLACES1 , "DP1"},
  57         {   15, PROTOCOL_QUAKEDP     , "QUAKEDP"},
  58         {   15, PROTOCOL_QUAKE       , "QUAKE"},
  59         {   28, PROTOCOL_QUAKEWORLD  , "QW"},
  60         {  250, PROTOCOL_NEHAHRAMOVIE, "NEHAHRAMOVIE"},
  61         {10000, PROTOCOL_NEHAHRABJP  , "NEHAHRABJP"},
  62         {10001, PROTOCOL_NEHAHRABJP2 , "NEHAHRABJP2"},
  63         {10002, PROTOCOL_NEHAHRABJP3 , "NEHAHRABJP3"},
  64         {    0, PROTOCOL_UNKNOWN     , NULL}
  65 };
  66
  67 protocolversion_t Protocol_EnumForName(const char *s)
  68 {
  69         int i;
  70         for (i = 0;protocolversioninfo[i].name;i++)
  71                 if (!strcasecmp(s, protocolversioninfo[i].name))
  72                         return protocolversioninfo[i].version;
  73         return PROTOCOL_UNKNOWN;
  74 }
  75
  76 const char *Protocol_NameForEnum(protocolversion_t p)
  77 {
  78         int i;
  79         for (i = 0;protocolversioninfo[i].name;i++)
  80                 if (protocolversioninfo[i].version == p)
  81                         return protocolversioninfo[i].name;
  82         return "UNKNOWN";
  83 }
  84
  85 protocolversion_t Protocol_EnumForNumber(int n)
  86 {
  87         int i;
  88         for (i = 0;protocolversioninfo[i].name;i++)
  89                 if (protocolversioninfo[i].number == n)
  90                         return protocolversioninfo[i].version;
  91         return PROTOCOL_UNKNOWN;
  92 }
  93
  94 int Protocol_NumberForEnum(protocolversion_t p)
  95 {
  96         int i;
  97         for (i = 0;protocolversioninfo[i].name;i++)
  98                 if (protocolversioninfo[i].version == p)
  99                         return protocolversioninfo[i].number;
 100         return 0;
 101 }
 102
 103 void Protocol_Names(char *buffer, size_t buffersize)
 104 {
 105         int i;
 106         if (buffersize < 1)
 107                 return;
 108         buffer[0] = 0;
 109         for (i = 0;protocolversioninfo[i].name;i++)
 110         {
 111                 if (i > 1)
 112                         strlcat(buffer, " ", buffersize);
 113                 strlcat(buffer, protocolversioninfo[i].name, buffersize);
 114         }
 115 }
 116
 117 void Protocol_UpdateClientStats(const int *stats)
 118 {
 119         int i;
 120         // update the stats array and set deltabits for any changed stats
 121         for (i = 0;i < MAX_CL_STATS;i++)
 122         {
 123                 if (host_client->stats[i] != stats[i])
 124                 {
 125                         host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
 126                         host_client->stats[i] = stats[i];
 127                 }
 128         }
 129 }
 130
 131 // only a few stats are within the 32 stat limit of Quake, and most of them
 132 // are sent every frame in svc_clientdata messages, so we only send the
 133 // remaining ones here
 134 static const int sendquakestats[] =
 135 {
 136 // quake did not send these secrets/monsters stats in this way, but doing so
 137 // allows a mod to increase STAT_TOTALMONSTERS during the game, and ensures
 138 // that STAT_SECRETS and STAT_MONSTERS are always correct (even if a client
 139 // didn't receive an svc_foundsecret or svc_killedmonster), which may be most
 140 // valuable if randomly seeking around in a demo
 141 STAT_TOTALSECRETS, // never changes during game
 142 STAT_TOTALMONSTERS, // changes in some mods
 143 STAT_SECRETS, // this makes svc_foundsecret unnecessary
 144 STAT_MONSTERS, // this makes svc_killedmonster unnecessary
 145 STAT_VIEWHEIGHT, // sent just for FTEQW clients
 146 STAT_VIEWZOOM, // this rarely changes
 147 -1,
 148 };
 149
 150 void Protocol_WriteStatsReliable(void)
 151 {
 152         int i, j;
 153         if (!host_client->netconnection)
 154                 return;
 155         // detect changes in stats and write reliable messages
 156         // this only deals with 32 stats because the older protocols which use
 157         // this function can only cope with 32 stats,
 158         // they also do not support svc_updatestatubyte which was introduced in
 159         // DP6 protocol (except for QW)
 160         for (j = 0;sendquakestats[j] >= 0;j++)
 161         {
 162                 i = sendquakestats[j];
 163                 // check if this bit is set
 164                 if (host_client->statsdeltabits[i >> 3] & (1 << (i & 7)))
 165                 {
 166                         host_client->statsdeltabits[i >> 3] -= (1 << (i & 7));
 167                         // send the stat as a byte if possible
 168                         if (sv.protocol == PROTOCOL_QUAKEWORLD)
 169                         {
 170                                 if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
 171                                 {
 172                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestat);
 173                                         MSG_WriteByte(&host_client->netconnection->message, i);
 174                                         MSG_WriteByte(&host_client->netconnection->message, host_client->stats[i]);
 175                                 }
 176                                 else
 177                                 {
 178                                         MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestatlong);
 179                                         MSG_WriteByte(&host_client->netconnection->message, i);
 180                                         MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
 181                                 }
 182                         }
 183                         else
 184                         {
 185                                 // this could make use of svc_updatestatubyte in DP6 and later
 186                                 // protocols but those protocols do not use this function
 187                                 MSG_WriteByte(&host_client->netconnection->message, svc_updatestat);
 188                                 MSG_WriteByte(&host_client->netconnection->message, i);
 189                                 MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
 190                         }
 191                 }
 192         }
 193 }
 194
 195 entity_state_t *EntityFrame4_GetReferenceEntity(entityframe4_database_t *d, int number)
 196 {
 197         if (d->maxreferenceentities <= number)
 198         {
 199                 int oldmax = d->maxreferenceentities;
 200                 entity_state_t *oldentity = d->referenceentity;
 201                 d->maxreferenceentities = (number + 15) & ~7;
 202                 d->referenceentity = (entity_state_t *)Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
 203                 if (oldentity)
 204                 {
 205                         memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
 206                         Mem_Free(oldentity);
 207                 }
 208                 // clear the newly created entities
 209                 for (;oldmax < d->maxreferenceentities;oldmax++)
 210                 {
 211                         d->referenceentity[oldmax] = defaultstate;
 212                         d->referenceentity[oldmax].number = oldmax;
 213                 }
 214         }
 215         return d->referenceentity + number;
 216 }
 217
 218 void EntityFrame4_AddCommitEntity(entityframe4_database_t *d, const entity_state_t *s)
 219 {
 220         // resize commit's entity list if full
 221         if (d->currentcommit->maxentities <= d->currentcommit->numentities)
 222         {
 223                 entity_state_t *oldentity = d->currentcommit->entity;
 224                 d->currentcommit->maxentities += 8;
 225                 d->currentcommit->entity = (entity_state_t *)Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
 226                 if (oldentity)
 227                 {
 228                         memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
 229                         Mem_Free(oldentity);
 230                 }
 231         }
 232         d->currentcommit->entity[d->currentcommit->numentities++] = *s;
 233 }
 234
 235 entityframe4_database_t *EntityFrame4_AllocDatabase(mempool_t *pool)
 236 {
 237         entityframe4_database_t *d;
 238         d = (entityframe4_database_t *)Mem_Alloc(pool, sizeof(*d));
 239         d->mempool = pool;
 240         EntityFrame4_ResetDatabase(d);
 241         return d;
 242 }
 243
 244 void EntityFrame4_FreeDatabase(entityframe4_database_t *d)
 245 {
 246         int i;
 247         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 248                 if (d->commit[i].entity)
 249                         Mem_Free(d->commit[i].entity);
 250         if (d->referenceentity)
 251                 Mem_Free(d->referenceentity);
 252         Mem_Free(d);
 253 }
 254
 255 void EntityFrame4_ResetDatabase(entityframe4_database_t *d)
 256 {
 257         int i;
 258         d->referenceframenum = -1;
 259         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 260                 d->commit[i].numentities = 0;
 261         for (i = 0;i < d->maxreferenceentities;i++)
 262                 d->referenceentity[i] = defaultstate;
 263 }
 264
 265 int EntityFrame4_AckFrame(entityframe4_database_t *d, int framenum, int servermode)
 266 {
 267         int i, j, found;
 268         entity_database4_commit_t *commit;
 269         if (framenum == -1)
 270         {
 271                 // reset reference, but leave commits alone
 272                 d->referenceframenum = -1;
 273                 for (i = 0;i < d->maxreferenceentities;i++)
 274                 {
 275                         d->referenceentity[i] = defaultstate;
 276                 // if this is the server, remove commits
 277                         for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
 278                                 commit->numentities = 0;
 279                 }
 280                 found = true;
 281         }
 282         else if (d->referenceframenum == framenum)
 283                 found = true;
 284         else
 285         {
 286                 found = false;
 287                 for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
 288                 {
 289                         if (commit->numentities && commit->framenum <= framenum)
 290                         {
 291                                 if (commit->framenum == framenum)
 292                                 {
 293                                         found = true;
 294                                         d->referenceframenum = framenum;
 295                                         if (developer_networkentities.integer >= 3)
 296                                         {
 297                                                 for (j = 0;j < commit->numentities;j++)
 298                                                 {
 299                                                         entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
 300                                                         if (commit->entity[j].active != s->active)
 301                                                         {
 302                                                                 if (commit->entity[j].active == ACTIVE_NETWORK)
 303                                                                         Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
 304                                                                 else
 305                                                                         Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
 306                                                         }
 307                                                         *s = commit->entity[j];
 308                                                 }
 309                                         }
 310                                         else
 311                                                 for (j = 0;j < commit->numentities;j++)
 312                                                         *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
 313                                 }
 314                                 commit->numentities = 0;
 315                         }
 316                 }
 317         }
 318         if (developer_networkentities.integer >= 1)
 319         {
 320                 Con_Printf("ack ref:%i database updated to: ref:%i commits:", framenum, d->referenceframenum);
 321                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 322                         if (d->commit[i].numentities)
 323                                 Con_Printf(" %i", d->commit[i].framenum);
 324                 Con_Print("\n");
 325         }
 326         return found;
 327 }
 328
 329 void EntityFrame4_CL_ReadFrame(void)
 330 {
 331         int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
 332         entity_state_t *s;
 333         entityframe4_database_t *d;
 334         if (!cl.entitydatabase4)
 335                 cl.entitydatabase4 = EntityFrame4_AllocDatabase(cls.levelmempool);
 336         d = cl.entitydatabase4;
 337         // read the number of the frame this refers to
 338         referenceframenum = MSG_ReadLong(&cl_message);
 339         // read the number of this frame
 340         framenum = MSG_ReadLong(&cl_message);
 341         CL_NewFrameReceived(framenum);
 342         // read the start number
 343         enumber = (unsigned short) MSG_ReadShort(&cl_message);
 344         if (developer_networkentities.integer >= 10)
 345         {
 346                 Con_Printf("recv svc_entities num:%i ref:%i database: ref:%i commits:", framenum, referenceframenum, d->referenceframenum);
 347                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 348                         if (d->commit[i].numentities)
 349                                 Con_Printf(" %i", d->commit[i].framenum);
 350                 Con_Print("\n");
 351         }
 352         if (!EntityFrame4_AckFrame(d, referenceframenum, false))
 353         {
 354                 Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
 355                 skip = true;
 356         }
 357         d->currentcommit = NULL;
 358         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 359         {
 360                 if (!d->commit[i].numentities)
 361                 {
 362                         d->currentcommit = d->commit + i;
 363                         d->currentcommit->framenum = framenum;
 364                         d->currentcommit->numentities = 0;
 365                 }
 366         }
 367         if (d->currentcommit == NULL)
 368         {
 369                 Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
 370                 skip = true;
 371         }
 372         done = false;
 373         while (!done && !cl_message.badread)
 374         {
 375                 // read the number of the modified entity
 376                 // (gaps will be copied unmodified)
 377                 n = (unsigned short)MSG_ReadShort(&cl_message);
 378                 if (n == 0x8000)
 379                 {
 380                         // no more entities in this update, but we still need to copy the
 381                         // rest of the reference entities (final gap)
 382                         done = true;
 383                         // read end of range number, then process normally
 384                         n = (unsigned short)MSG_ReadShort(&cl_message);
 385                 }
 386                 // high bit means it's a remove message
 387                 cnumber = n & 0x7FFF;
 388                 // if this is a live entity we may need to expand the array
 389                 if (cl.num_entities <= cnumber && !(n & 0x8000))
 390                 {
 391                         cl.num_entities = cnumber + 1;
 392                         if (cnumber >= cl.max_entities)
 393                                 CL_ExpandEntities(cnumber);
 394                 }
 395                 // add one (the changed one) if not done
 396                 stopnumber = cnumber + !done;
 397                 // process entities in range from the last one to the changed one
 398                 for (;enumber < stopnumber;enumber++)
 399                 {
 400                         if (skip || enumber >= cl.num_entities)
 401                         {
 402                                 if (enumber == cnumber && (n & 0x8000) == 0)
 403                                 {
 404                                         entity_state_t tempstate;
 405                                         EntityState_ReadFields(&tempstate, EntityState_ReadExtendBits());
 406                                 }
 407                                 continue;
 408                         }
 409                         // slide the current into the previous slot
 410                         cl.entities[enumber].state_previous = cl.entities[enumber].state_current;
 411                         // copy a new current from reference database
 412                         cl.entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
 413                         s = &cl.entities[enumber].state_current;
 414                         // if this is the one to modify, read more data...
 415                         if (enumber == cnumber)
 416                         {
 417                                 if (n & 0x8000)
 418                                 {
 419                                         // simply removed
 420                                         if (developer_networkentities.integer >= 2)
 421                                                 Con_Printf("entity %i: remove\n", enumber);
 422                                         *s = defaultstate;
 423                                 }
 424                                 else
 425                                 {
 426                                         // read the changes
 427                                         if (developer_networkentities.integer >= 2)
 428                                                 Con_Printf("entity %i: update\n", enumber);
 429                                         s->active = ACTIVE_NETWORK;
 430                                         EntityState_ReadFields(s, EntityState_ReadExtendBits());
 431                                 }
 432                         }
 433                         else if (developer_networkentities.integer >= 4)
 434                                 Con_Printf("entity %i: copy\n", enumber);
 435                         // set the cl.entities_active flag
 436                         cl.entities_active[enumber] = (s->active == ACTIVE_NETWORK);
 437                         // set the update time
 438                         s->time = cl.mtime[0];
 439                         // fix the number (it gets wiped occasionally by copying from defaultstate)
 440                         s->number = enumber;
 441                         // check if we need to update the lerp stuff
 442                         if (s->active == ACTIVE_NETWORK)
 443                                 CL_MoveLerpEntityStates(&cl.entities[enumber]);
 444                         // add this to the commit entry whether it is modified or not
 445                         if (d->currentcommit)
 446                                 EntityFrame4_AddCommitEntity(d, &cl.entities[enumber].state_current);
 447                         // print extra messages if desired
 448                         if (developer_networkentities.integer >= 2 && cl.entities[enumber].state_current.active != cl.entities[enumber].state_previous.active)
 449                         {
 450                                 if (cl.entities[enumber].state_current.active == ACTIVE_NETWORK)
 451                                         Con_Printf("entity #%i has become active\n", enumber);
 452                                 else if (cl.entities[enumber].state_previous.active)
 453                                         Con_Printf("entity #%i has become inactive\n", enumber);
 454                         }
 455                 }
 456         }
 457         d->currentcommit = NULL;
 458         if (skip)
 459                 EntityFrame4_ResetDatabase(d);
 460 }
 461
 462 qboolean EntityFrame4_WriteFrame(sizebuf_t *msg, int maxsize, entityframe4_database_t *d, int numstates, const entity_state_t **states)
 463 {
 464         prvm_prog_t *prog = SVVM_prog;
 465         const entity_state_t *e, *s;
 466         entity_state_t inactiveentitystate;
 467         int i, n, startnumber;
 468         sizebuf_t buf;
 469         unsigned char data[128];
 470
 471         // if there isn't enough space to accomplish anything, skip it
 472         if (msg->cursize + 24 > maxsize)
 473                 return false;
 474
 475         // prepare the buffer
 476         memset(&buf, 0, sizeof(buf));
 477         buf.data = data;
 478         buf.maxsize = sizeof(data);
 479
 480         for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 481                 if (!d->commit[i].numentities)
 482                         break;
 483         // if commit buffer full, just don't bother writing an update this frame
 484         if (i == MAX_ENTITY_HISTORY)
 485                 return false;
 486         d->currentcommit = d->commit + i;
 487
 488         // this state's number gets played around with later
 489         inactiveentitystate = defaultstate;
 490
 491         d->currentcommit->numentities = 0;
 492         d->currentcommit->framenum = ++d->latestframenumber;
 493         MSG_WriteByte(msg, svc_entities);
 494         MSG_WriteLong(msg, d->referenceframenum);
 495         MSG_WriteLong(msg, d->currentcommit->framenum);
 496         if (developer_networkentities.integer >= 10)
 497         {
 498                 Con_Printf("send svc_entities num:%i ref:%i (database: ref:%i commits:", d->currentcommit->framenum, d->referenceframenum, d->referenceframenum);
 499                 for (i = 0;i < MAX_ENTITY_HISTORY;i++)
 500                         if (d->commit[i].numentities)
 501                                 Con_Printf(" %i", d->commit[i].framenum);
 502                 Con_Print(")\n");
 503         }
 504         if (d->currententitynumber >= prog->max_edicts)
 505                 startnumber = 1;
 506         else
 507                 startnumber = bound(1, d->currententitynumber, prog->max_edicts - 1);
 508         MSG_WriteShort(msg, startnumber);
 509         // reset currententitynumber so if the loop does not break it we will
 510         // start at beginning next frame (if it does break, it will set it)
 511         d->currententitynumber = 1;
 512         for (i = 0, n = startnumber;n < prog->max_edicts;n++)
 513         {
 514                 if (PRVM_serveredictfunction((&prog->edicts[n]), SendEntity))
 515                         continue;
 516                 // find the old state to delta from
 517                 e = EntityFrame4_GetReferenceEntity(d, n);
 518                 // prepare the buffer
 519                 SZ_Clear(&buf);
 520                 // entity exists, build an update (if empty there is no change)
 521                 // find the state in the list
 522                 for (;i < numstates && states[i]->number < n;i++);
 523                 // make the message
 524                 s = states[i];
 525                 if (s->number == n)
 526                 {
 527                         // build the update
 528                         EntityState_WriteUpdate(s, &buf, e);
 529                 }
 530                 else
 531                 {
 532                         inactiveentitystate.number = n;
 533                         s = &inactiveentitystate;
 534                         if (e->active == ACTIVE_NETWORK)
 535                         {
 536                                 // entity used to exist but doesn't anymore, send remove
 537                                 MSG_WriteShort(&buf, n | 0x8000);
 538                         }
 539                 }
 540                 // if the commit is full, we're done this frame
 541                 if (msg->cursize + buf.cursize > maxsize - 4)
 542                 {
 543                         // next frame we will continue where we left off
 544                         break;
 545                 }
 546                 // add the entity to the commit
 547                 EntityFrame4_AddCommitEntity(d, s);
 548                 // if the message is empty, skip out now
 549                 if (buf.cursize)
 550                 {
 551                         // write the message to the packet
 552                         SZ_Write(msg, buf.data, buf.cursize);
 553                 }
 554         }
 555         d->currententitynumber = n;
 556
 557         // remove world message (invalid, and thus a good terminator)
 558         MSG_WriteShort(msg, 0x8000);
 559         // write the number of the end entity
 560         MSG_WriteShort(msg, d->currententitynumber);
 561         // just to be sure
 562         d->currentcommit = NULL;
 563
 564         return true;
 565 }