| 244 | |
| 245 | |
| 246 | inline void ModelPPM::UpdateModel() |
| 247 | { |
| 248 | RARPPM_STATE fs = *FoundState, *p = NULL; |
| 249 | RARPPM_CONTEXT *pc, *Successor; |
| 250 | uint ns1, ns, cf, sf, s0; |
| 251 | if (fs.Freq < MAX_FREQ/4 && (pc=MinContext->Suffix) != NULL) |
| 252 | { |
| 253 | if (pc->NumStats != 1) |
| 254 | { |
| 255 | if ((p=pc->U.Stats)->Symbol != fs.Symbol) |
| 256 | { |
| 257 | do |
| 258 | { |
| 259 | p++; |
| 260 | } while (p->Symbol != fs.Symbol); |
| 261 | if (p[0].Freq >= p[-1].Freq) |
| 262 | { |
| 263 | _PPMD_SWAP(p[0],p[-1]); |
| 264 | p--; |
| 265 | } |
| 266 | } |
| 267 | if (p->Freq < MAX_FREQ-9) |
| 268 | { |
| 269 | p->Freq += 2; |
| 270 | pc->U.SummFreq += 2; |
| 271 | } |
| 272 | } |
| 273 | else |
| 274 | { |
| 275 | p=&(pc->OneState); |
| 276 | p->Freq += (p->Freq < 32); |
| 277 | } |
| 278 | } |
| 279 | if ( !OrderFall ) |
| 280 | { |
| 281 | MinContext=MaxContext=FoundState->Successor=CreateSuccessors(TRUE,p); |
| 282 | if ( !MinContext ) |
| 283 | goto RESTART_MODEL; |
| 284 | return; |
| 285 | } |
| 286 | *SubAlloc.pText++ = fs.Symbol; |
| 287 | Successor = (RARPPM_CONTEXT*) SubAlloc.pText; |
| 288 | if (SubAlloc.pText >= SubAlloc.FakeUnitsStart) |
| 289 | goto RESTART_MODEL; |
| 290 | if ( fs.Successor ) |
| 291 | { |
| 292 | if ((byte*) fs.Successor <= SubAlloc.pText && |
| 293 | (fs.Successor=CreateSuccessors(FALSE,p)) == NULL) |
| 294 | goto RESTART_MODEL; |
| 295 | if ( !--OrderFall ) |
| 296 | { |
| 297 | Successor=fs.Successor; |
| 298 | SubAlloc.pText -= (MaxContext != MinContext); |
| 299 | } |
| 300 | } |
| 301 | else |
| 302 | { |
| 303 | FoundState->Successor=Successor; |
nothing calls this directly
no test coverage detected