workbench/libs/iffparse/iffparse_intern.h

   1 /*
   2     Copyright © 1995-2006, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #ifndef IFFPARSE_INTERN_H
   7 #define IFFPARSE_INTERN_H
   8
   9 /* Include files */
  10
  11 #ifndef EXEC_TYPES_H
  12 #   include <exec/types.h>
  13 #endif
  14 #ifndef CLIB_ALIB_PROTOS_H
  15 #   include <clib/alib_protos.h>
  16 #endif
  17 #ifndef PROTO_EXEC_H
  18 #   include <proto/exec.h>
  19 #endif
  20 #ifndef PROTO_DOS_H
  21 #   include <proto/dos.h>
  22 #endif
  23 #ifndef PROTO_UTILITY_H
  24 #   include <proto/utility.h>
  25 #endif
  26 #ifndef PROTO_IFFPARSE_H
  27 #   include <proto/iffparse.h>
  28 #endif
  29 #ifndef LIBRARIES_IFFPARSE_H
  30 #   include <libraries/iffparse.h>
  31 #endif
  32 #ifndef EXEC_MEMORY_H
  33 #   include <exec/memory.h>
  34 #endif
  35 #ifndef EXEC_LIBRARIES_H
  36 #   include <exec/libraries.h>
  37 #endif
  38 #ifndef AROS_LIBCALL_H
  39 #   include <aros/libcall.h>
  40 #endif
  41 #ifndef DOS_DOS_H
  42 #   include <dos/dos.h>
  43 #endif
  44 #ifndef UTILITY_HOOKS_H
  45 #   include <utility/hooks.h>
  46 #endif
  47 #include <stdlib.h>
  48
  49 /* Some external stuff (iffparse_init.c) */
  50
  51
  52 struct IFFParseBase_intern; /* prerefrence */
  53
  54 /* Internal prototypes */
  55 LONG ReadStream      (struct IFFHandle *, APTR, LONG, struct IFFParseBase_intern *);
  56 LONG ReadStreamLong  (struct IFFHandle *, APTR, struct IFFParseBase_intern *);
  57 LONG WriteStream     (struct IFFHandle *, APTR, LONG, struct IFFParseBase_intern *);
  58 LONG WriteStreamLong (struct IFFHandle *, APTR, struct IFFParseBase_intern *);
  59 VOID PurgeLCI        (struct LocalContextItem *, struct IFFParseBase_intern *);
  60
  61 LONG PushContextNode (struct IFFHandle *, LONG ,LONG, LONG, LONG, struct IFFParseBase_intern *);
  62 VOID PopContextNode  (struct IFFHandle *, struct IFFParseBase_intern *);
  63 LONG GetChunkHeader  (struct IFFHandle *, struct IFFParseBase_intern *);
  64 LONG InvokeHandlers  (struct IFFHandle *, LONG, LONG, struct IFFParseBase_intern *);
  65 LONG SeekStream      (struct IFFHandle *, LONG, struct IFFParseBase_intern *);
  66
  67 /* Some system entry & exit handlers (hook funcs) ß*/
  68 LONG ExitContextFunc(struct Hook *, APTR, APTR);
  69 LONG StopFunc       (struct Hook *, APTR, APTR);
  70 LONG PropFunc       (struct Hook *, struct IFFHandle *, APTR);
  71 LONG CollectionFunc (struct Hook *, struct IFFHandle *, APTR);
  72
  73 /* A system purge hook for purging the LCIs installed by PropChunk and CollectionChunk */
  74 IPTR CollectionPurgeFunc (struct Hook *, struct LocalContextItem *, ULONG);
  75 IPTR PropPurgeFunc       (struct Hook *, struct LocalContextItem *, ULONG);
  76
  77 /* Buffer functions */
  78 struct BufferList * AllocBuffer (ULONG, struct IFFParseBase_intern *);
  79 VOID                FreeBuffer  (struct BufferList *, struct IFFParseBase_intern *);
  80
  81 struct BufferNode * AllocBufferNode (struct BufferList *, struct IFFParseBase_intern *);
  82
  83 LONG WriteToBuffer  (struct BufferList *, UBYTE *, LONG, struct IFFParseBase_intern *);
  84 BOOL SeekBuffer     (struct BufferList *, LONG);
  85
  86 BOOL BufferToStream (struct BufferList *, struct IFFHandle *, struct IFFParseBase_intern *);
  87
  88 /* StreamHandler hooks */
  89
  90 IPTR DOSStreamHandler  (struct Hook *, struct IFFHandle *, struct IFFStreamCmd *);
  91 IPTR ClipStreamHandler (struct Hook *, struct IFFHandle *, struct IFFStreamCmd *);
  92 IPTR BufStreamHandler  (struct Hook *, struct IFFHandle *, struct IFFStreamCmd *);
  93
  94 /* Message port help functions */
  95
  96 BOOL InitPort  (struct MsgPort *, struct Task *, struct IFFParseBase_intern *);
  97 VOID ClosePort (struct MsgPort *, struct IFFParseBase_intern *);
  98
  99
 100 /* Buffered stream install/deinstall */
 101 LONG InitBufferedStream (struct IFFHandle*, struct IFFParseBase_intern *);
 102 LONG ExitBufferedStream (struct IFFHandle*, struct IFFParseBase_intern *);
 103
 104 /* Endian conversion */
 105 LONG SwitchIfLittleEndian(LONG);
 106
 107 /* Private flags */
 108
 109 #define IFFF_NEWFILE        (1L << 16)
 110 #define IFFF_OPEN           (1L << 19)
 111
 112 /*
 113     The different states the parser can be in.
 114     Chose values so that the compiler easily can create a jump table
 115 */
 116 #define IFFSTATE_COMPOSITE  0
 117 #define IFFSTATE_PUSHCHUNK  1
 118 #define IFFSTATE_ATOMIC     2
 119 #define IFFSTATE_SCANEXIT   3
 120 #define IFFSTATE_EXIT       4
 121 #define IFFSTATE_POPCHUNK   5
 122
 123 /* Size of one tile of a buffer to use in buffering of chunks */
 124 #define BUFFERNODESIZE      10000
 125
 126 /* Size of buffer fake a forward seek with Read()s */
 127 #define SEEKBUFSIZE         10000
 128
 129
 130 /************************/
 131 /* Internal structures  */
 132 /************************/
 133
 134 /* Structure for maintaing a list of buffers for buffering */
 135 struct BufferList
 136 {
 137     struct MinList bl_ListHeader;
 138
 139     /* The size of each buffer */
 140     ULONG bl_BufferNodeSize;
 141
 142     /* The current position of the Write/Seek pointer */
 143
 144     /* A buffer node */
 145     struct BufferNode * bl_CurrentNode;
 146     /* An offset pointer into that particular node. */
 147     ULONG bl_CurrentOffset;
 148     /*
 149         The number of the current buffernode (the number in the list).
 150         First buffenode is number 1 (not 0)
 151     */
 152     ULONG bl_CurrentNodeNum;
 153
 154     /* Number of bytes written to the bufferlist */
 155     ULONG bl_BufferSize;
 156
 157     /* Number of nodes in the list */
 158
 159 };
 160
 161 /*
 162     One node in the bufferlist.
 163     Contains a pointer to the buffer - tile itself
 164 */
 165
 166 struct BufferNode
 167 {
 168     struct MinNode bn_Node;
 169     UBYTE        * bn_BufferPtr;
 170
 171 };
 172
 173
 174 /*
 175     Internal version of a ContextNode. Contains a list of
 176     LocalContextItems.
 177 */
 178 struct IntContextNode
 179 {
 180     struct ContextNode CN;
 181     struct MinList     cn_LCIList;
 182
 183     /* True if this chunk is a FORM, LIST or CAT */
 184     BOOL               cn_Composite;
 185 };
 186
 187 #define GetIntCN(cn)   ((struct IntContextNode *)(cn))
 188 #define GetCN(cn)      (&GetIntCN(cn)->CN))
 189
 190
 191 /*
 192     Internal version of the IffHandle data structure. Contains quite a bit
 193     of useful information, eg the current context etc.
 194 */
 195
 196
 197 struct IntIFFHandle
 198 {
 199     struct IFFHandle IH;
 200
 201     /* The default context node is built-in into the iffhandle */
 202     struct IntContextNode iff_DefaultCN;
 203
 204     /* A linkedlist simulated stack with context nodes */
 205     struct MinList iff_CNStack;
 206
 207     /* containd the state in which the parser currently is */
 208     ULONG iff_CurrentState;
 209
 210     /*
 211         The context depth at which we have started buffering.
 212         0 if no buffering is needed.
 213     */
 214     ULONG iff_BufferStartDepth;
 215
 216     /* Here InitIff store it's parameters */
 217     struct Hook * iff_StreamHandler;
 218
 219     /*
 220         Entrys to preserve the StreamHandler, stream  and the stream flags
 221         whenever the buffering streamhandle is inserted
 222     */
 223
 224     struct Hook * iff_PreservedHandler;
 225     LONG          iff_PreservedFlags;
 226     IPTR          iff_PreservedStream;
 227 };
 228 #define GetIntIH(ih) ((struct IntIFFHandle *)(ih))
 229 #define GetIH(ih)    (&GetIntIH(ih)->IH)
 230
 231 /*
 232     Internal version of the LocalContextItem structure. Contains
 233     the dataSize and a Hook for purging...
 234 */
 235
 236 struct IntLocalContextItem
 237 {
 238     struct LocalContextItem LCI;
 239
 240     struct Hook * lci_PurgeHook;
 241     UBYTE       * lci_UserData;
 242     ULONG         lci_UserDataSize;
 243 };
 244
 245 #define GetIntLCI(lci) ((struct IntLocalContextItem *)(lci))
 246 #define GetLCI(lci)    (&GetIntLCI(lci)->LCI)
 247
 248 /* LocalItem data in IFFLCI_ENTRY/EXITHANDLER LCIs */
 249
 250 struct HandlerInfo
 251 {
 252     struct Hook * hi_Hook;
 253     APTR          hi_Object;
 254 };
 255
 256
 257 /* LocalItem data inside IFFLCI_PROP LCIs */
 258 struct CIPtr
 259 {
 260     struct CollectionItem * FirstCI;
 261 };
 262
 263
 264
 265 /* Usefull macros */
 266 #define TopChunk( iff ) (struct ContextNode*)GetIntIH(iff)->iff_CNStack.mlh_Head
 267 #define RootChunk(iff) (struct ContextNode*)GetIntIH(iff)->iff_CNStack.mlh_TailPred
 268
 269 struct IFFParseBase_intern
 270 {
 271     struct Library    lib;
 272
 273     struct Hook       stophook;
 274     struct Hook       prophook;
 275     struct Hook       collectionhook;
 276     struct Hook       doshook;
 277     struct Hook       cliphook;
 278     struct Hook       bufhook;
 279     struct Hook       collectionpurgehook;
 280     struct Hook       proppurgehook;
 281     struct Hook       exitcontexthook;
 282 };
 283
 284 #define IPB(ipb)        ((struct IFFParseBase_intern *)ipb)
 285
 286 //void  dprintf(const char *, ...) __attribute__ ((format (printf, 1, 2)));
 287 void    dprintf(const char *, ...);
 288
 289
 290 #define DEBUG_ALLOCIFF(x)               ;
 291 #define DEBUG_ALLOCLOCALITEM(x)         ;
 292 #define DEBUG_ALLOCBUFFER(x)            ;
 293 #define DEBUG_WRITETOBUFFER(x)          ;
 294 #define DEBUG_SEEKBUFFER(x)             ;
 295 #define DEBUG_BUFFERTOSTREAM(x)         ;
 296 #define DEBUG_INITBUFFEREDSTREAM(x)     ;
 297 #define DEBUG_EXITBUFFEREDSTREAM(x)     ;
 298 #define DEBUG_BUFSTREAMHANDLER(x)       ;
 299 #define DEBUG_DOSSTREAMHANDLER(x)       ;
 300 #define DEBUG_READCHUNKRECORDS(x)       ;
 301 #define DEBUG_WRITECHUNKRECORDS(x)      ;
 302 #define DEBUG_INITIFFAS(x)              ;
 303 #define DEBUG_INITIFF(x)                ;
 304 #define DEBUG_SETLOCALEITEMPURGE(x)     ;
 305 #define DEBUG_PROPHOOKS(x)              ;
 306
 307 #define DEBUG_COLLECTIONCHUNK(x)        ;
 308 #define DEBUG_COLLECTIONCHUNKS(x)       ;
 309 #define DEBUG_FINDCOLLECTION(x)         ;
 310 #define DEBUG_FINDLOCALITEM(x)          ;
 311 #define DEBUG_FINDPROP(x)               ;
 312 #define DEBUG_POPCHUNK(x)               ;
 313 #define DEBUG_PROPCHUNK(x)              ;
 314 #define DEBUG_PROPCHUNKS(x)             ;
 315 #define DEBUG_PUSHCHUNK(x)              ;
 316 #define DEBUG_READCHUNKBYTES(x)         ;
 317 #define DEBUG_STOPCHUNK(x)              ;
 318 #define DEBUG_STOPCHUNKS(x)             ;
 319 #define DEBUG_STOPONEXIT(x)             ;
 320 #define DEBUG_STOREITEMINCONTEXT(x)     ;
 321 #define DEBUG_STORELOCALITEM(x)         ;
 322 #define DEBUG_WRITECHUNKBYTES(x)        ;
 323
 324 #define dmkid(id) ((id) >> 24) & 0xff, ((id) >> 16) & 0xff, ((id) >> 8) & 0xff, (id) & 0xff
 325
 326 #endif /* IFFPARSE_INTERN_H */