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- #ifndef IFF_IFFPARSE_H
- #define IFF_IFFPARSE_H
- /*
- ** $Filename: libraries/iffparse.h $
- ** $Release: 2.04 Includes, V37.4 $
- ** $Revision: 33.1 $
- ** $Date: 90/11/20 $
- **
- ** Structure definitions for the all new good nifty IFF code.
- **
- ** (C) Copyright 1989-1991 Commodore-Amiga Inc., Stuart Ferguson, and
- ** Leo L. Schwab
- ** All Rights Reserved
- */
-
- #ifndef EXEC_TYPES_H
- #include <exec/types.h>
- #endif
- #ifndef EXEC_LISTS_H
- #include <exec/lists.h>
- #endif
- #ifndef EXEC_PORTS_H
- #include <exec/ports.h>
- #endif
- #ifndef DEVICES_CLIPBOARD_H
- #include <devices/clipboard.h>
- #endif
-
- /*
- * Struct associated with an active IFF stream.
- * "iff_Stream" is a value used by the client's read/write/seek functions -
- * it will not be accessed by the library itself and can have any value
- * (could even be a pointer or a BPTR).
- */
- struct IFFHandle {
- ULONG iff_Stream;
- ULONG iff_Flags;
- LONG iff_Depth; /* Depth of context stack. */
- /* There are private fields hiding here. */
- };
-
- /*
- * Bit masks for "iff_Flags" field.
- */
- #define IFFF_READ 0L /* read mode - default */
- #define IFFF_WRITE 1L /* write mode */
- #define IFFF_RWBITS (IFFF_READ | IFFF_WRITE) /* read/write bits */
- #define IFFF_FSEEK (1L<<1) /* forward seek only */
- #define IFFF_RSEEK (1L<<2) /* random seek */
- #define IFFF_RESERVED 0xFFFF0000L /* Don't touch these bits. */
-
- /*
- * When the library calls your stream handler, you'll be passed a pointer
- * to this structure as the "message packet".
- */
- struct IFFStreamCmd {
- LONG sc_Command; /* Operation to be performed (IFFCMD_) */
- APTR sc_Buf; /* Pointer to data buffer */
- LONG sc_NBytes; /* Number of bytes to be affected */
- };
-
- /*
- * A node associated with a context on the iff_Stack. Each node
- * represents a chunk, the stack representing the current nesting
- * of chunks in the open IFF file. Each context node has associated
- * local context items in the (private) LocalItems list. The ID, type,
- * size and scan values describe the chunk associated with this node.
- */
- struct ContextNode {
- struct MinNode cn_Node;
- LONG cn_ID;
- LONG cn_Type;
- LONG cn_Size; /* Size of this chunk */
- LONG cn_Scan; /* # of bytes read/written so far */
- /* There are private fields hiding here. */
- };
-
- /*
- * Local context items live in the ContextNode's. Each class is identified
- * by its lci_Ident code and has a (private) purge vector for when the
- * parent context node is popped.
- */
- struct LocalContextItem {
- struct MinNode lci_Node;
- ULONG lci_ID,
- lci_Type,
- lci_Ident;
- /* There are private fields hiding here. */
- };
-
- /*
- * StoredProperty: a local context item containing the data stored
- * from a previously encountered property chunk.
- */
- struct StoredProperty {
- LONG sp_Size;
- UBYTE *sp_Data;
- };
-
- /*
- * Collection Item: the actual node in the collection list at which
- * client will look. The next pointers cross context boundaries so
- * that the complete list is accessable.
- */
- struct CollectionItem {
- struct CollectionItem *ci_Next;
- LONG ci_Size;
- UBYTE *ci_Data;
- };
-
- /*
- * Structure returned by OpenClipboard(). You may do CMD_POSTs and such
- * using this structure. However, once you call OpenIFF(), you may not
- * do any more of your own I/O to the clipboard until you call CloseIFF().
- */
- struct ClipboardHandle {
- struct IOClipReq cbh_Req;
- struct MsgPort cbh_CBport;
- struct MsgPort cbh_SatisfyPort;
- };
-
- /*
- * IFF return codes. Most functions return either zero for success or
- * one of these codes. The exceptions are the read/write functions which
- * return positive values for number of bytes or records read or written,
- * or a negative error code. Some of these codes are not errors per sae,
- * but valid conditions such as EOF or EOC (End of Chunk).
- */
- #define IFFERR_EOF -1L /* Reached logical end of file */
- #define IFFERR_EOC -2L /* About to leave context */
- #define IFFERR_NOSCOPE -3L /* No valid scope for property */
- #define IFFERR_NOMEM -4L /* Internal memory alloc failed*/
- #define IFFERR_READ -5L /* Stream read error */
- #define IFFERR_WRITE -6L /* Stream write error */
- #define IFFERR_SEEK -7L /* Stream seek error */
- #define IFFERR_MANGLED -8L /* Data in file is corrupt */
- #define IFFERR_SYNTAX -9L /* IFF syntax error */
- #define IFFERR_NOTIFF -10L /* Not an IFF file */
- #define IFFERR_NOHOOK -11L /* No call-back hook provided */
- #define IFF_RETURN2CLIENT -12L /* Client handler normal return*/
-
- #define MAKE_ID(a,b,c,d) \
- ((ULONG) (a)<<24 | (ULONG) (b)<<16 | (ULONG) (c)<<8 | (ULONG) (d))
-
- /*
- * Universal IFF identifiers.
- */
- #define ID_FORM MAKE_ID('F','O','R','M')
- #define ID_LIST MAKE_ID('L','I','S','T')
- #define ID_CAT MAKE_ID('C','A','T',' ')
- #define ID_PROP MAKE_ID('P','R','O','P')
- #define ID_NULL MAKE_ID(' ',' ',' ',' ')
-
- /*
- * Ident codes for universally recognized local context items.
- */
- #define IFFLCI_PROP MAKE_ID('p','r','o','p')
- #define IFFLCI_COLLECTION MAKE_ID('c','o','l','l')
- #define IFFLCI_ENTRYHANDLER MAKE_ID('e','n','h','d')
- #define IFFLCI_EXITHANDLER MAKE_ID('e','x','h','d')
-
- /*
- * Control modes for ParseIFF() function.
- */
- #define IFFPARSE_SCAN 0L
- #define IFFPARSE_STEP 1L
- #define IFFPARSE_RAWSTEP 2L
-
- /*
- * Control modes for StoreLocalItem().
- */
- #define IFFSLI_ROOT 1L /* Store in default context */
- #define IFFSLI_TOP 2L /* Store in current context */
- #define IFFSLI_PROP 3L /* Store in topmost FORM or LIST */
-
- /*
- * "Flag" for writing functions. If you pass this value in as a size
- * to PushChunk() when writing a file, the parser will figure out the
- * size of the chunk for you. (Chunk sizes >= 2**31 are forbidden by the
- * IFF specification, so this works.)
- */
- #define IFFSIZE_UNKNOWN -1L
-
- /*
- * Possible call-back command values. (Using 0 as the value for IFFCMD_INIT
- * was, in retrospect, probably a bad idea.)
- */
- #define IFFCMD_INIT 0 /* Prepare the stream for a session */
- #define IFFCMD_CLEANUP 1 /* Terminate stream session */
- #define IFFCMD_READ 2 /* Read bytes from stream */
- #define IFFCMD_WRITE 3 /* Write bytes to stream */
- #define IFFCMD_SEEK 4 /* Seek on stream */
- #define IFFCMD_ENTRY 5 /* You just entered a new context */
- #define IFFCMD_EXIT 6 /* You're about to leave a context */
- #define IFFCMD_PURGELCI 7 /* Purge a LocalContextItem */
-
- /* Backward compatibility. Don't use these in new code. */
- #define IFFSCC_INIT IFFCMD_INIT
- #define IFFSCC_CLEANUP IFFCMD_CLEANUP
- #define IFFSCC_READ IFFCMD_READ
- #define IFFSCC_WRITE IFFCMD_WRITE
- #define IFFSCC_SEEK IFFCMD_SEEK
-
- #endif
-