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Autodocs
 Libraries:
 iffparse.library
  AllocIFF
  AllocLocalItem
  CloseClipboard
  CloseIFF
  CollectionChunk
  CollectionChunks
  CurrentChunk
  EntryHandler
  ExitHandler
  FindCollection
  FindLocalItem
  FindProp
  FindPropContext
  FreeIFF
  FreeLocalItem
  GoodID
  GoodType
  IDtoStr
  InitIFF
  InitIFFasClip
  InitIFFasDOS
  LocalItemData
  OpenClipboard
  OpenIFF
  ParentChunk
  ParseIFF
  PopChunk
  PropChunk
  PropChunks
  PushChunk
  ReadChunkBytes
  ReadChunkRecords
  SetLocalItemPurge
  StopChunk
  StopChunks
  StopOnExit
  StoreItemInContext
  StoreLocalItem
  WriteChunkBytes
  WriteChunkRecords
Include
GuruMeditation
Docs » Autodocs » iffparse.library » PushChunk

NAME

	PushChunk -- push a new context node on the context stack. (V36)

SYNOPSIS

	error = PushChunk(iff, type, id, size);
D0 A0 D0 D1 D2
LONG PushChunk(struct IFFHandle *, LONG, LONG, LONG);

FUNCTION

	Pushes a new context node on the context stack by reading it from the
stream if this is a read file, or by creating it from the passed
parameters if this is a write file. Normally this function is only
called in write mode, where the type and id codes specify the new
chunk to create. If this is a leaf chunk, i.e. a local chunk inside
a FORM or PROP chunk, then the type argument is ignored. If the size
is specified then the chunk writing functions will enforce this size.
If the size is given as IFFSIZE_UNKNOWN, the chunk will expand to
accommodate whatever is written into it.

INPUTS

	iff - pointer to IFFHandle structure.
type - chunk type specifier (ex. ILBM) (ignored for read mode or
leaf chunks).
id - chunk id specifier (ex. CMAP) (ignored for read mode).
size - size of the chunk to create or IFFSIZE_UNKNOWN (ignored for
read mode).

RESULT

	error - 0 if successful or an IFFERR_#? error code if not unsuccessful.

SEE ALSO

PopChunk(), WriteChunkRecords(), WriteChunkBytes(), <libraries/iffparse.h>

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