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reddsik
2017-03-26 13:00:19 +02:00
commit c85716f60e
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libami/iffparse.c Normal file
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#include "libami.h"
#include "alloc.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef AMIGAOS
static LONG callIFFHook(struct IFFHandle *iff, LONG cmd, APTR buf, LONG nby)
{
struct IFFStreamCmd c;
c.sc_Command = cmd;
c.sc_Buf = buf;
c.sc_NBytes = nby;
if(iff->iff_Hook == NULL)
return IFFERR_NOHOOK;
else
return iff->iff_Hook->h_SubEntry(iff->iff_Hook, iff, &c);
}
LONG ReadChunkBytes( struct IFFHandle *iff, APTR buf, long numBytes );
LONG WriteChunkBytes( struct IFFHandle *iff, APTR buf, long numBytes );
LONG ReadChunkRecords( struct IFFHandle *iff, APTR buf, long bytesPerRecord,
long numRecords );
LONG WriteChunkRecords( struct IFFHandle *iff, APTR buf, long bytesPerRecord,
long numRecords );
LONG PushChunk( struct IFFHandle *iff, long type, long id, long size );
LONG PopChunk( struct IFFHandle *iff );
LONG EntryHandler( struct IFFHandle *iff, long type, long id, long position,
struct Hook *handler, APTR object );
LONG ExitHandler( struct IFFHandle *iff, long type, long id, long position,
struct Hook *handler, APTR object );
LONG PropChunk( struct IFFHandle *iff, long type, long id );
LONG PropChunks( struct IFFHandle *iff, LONG *propArray, long numPairs );
LONG StopChunk( struct IFFHandle *iff, long type, long id );
LONG StopChunks( struct IFFHandle *iff, LONG *propArray, long numPairs );
LONG CollectionChunk( struct IFFHandle *iff, long type, long id );
LONG CollectionChunks( struct IFFHandle *iff, LONG *propArray,
long numPairs );
LONG StopOnExit( struct IFFHandle *iff, long type, long id );
struct StoredProperty *FindProp( struct IFFHandle *iff, long type, long id );
struct CollectionItem *FindCollection( struct IFFHandle *iff, long type,
long id );
struct ContextNode *FindPropContext( struct IFFHandle *iff );
struct ContextNode *CurrentChunk( struct IFFHandle *iff );
struct ContextNode *ParentChunk( struct ContextNode *contextNode );
struct LocalContextItem *AllocLocalItem( long type, long id, long ident,
long dataSize );
APTR LocalItemData( struct LocalContextItem *localItem );
void SetLocalItemPurge( struct LocalContextItem *localItem,
struct Hook *purgeHook );
void FreeLocalItem( struct LocalContextItem *localItem );
struct LocalContextItem *FindLocalItem( struct IFFHandle *iff, long type,
long id, long ident );
LONG StoreLocalItem( struct IFFHandle *iff, struct LocalContextItem *localItem,
long position );
void StoreItemInContext( struct IFFHandle *iff,
struct LocalContextItem *localItem,
struct ContextNode *contextNode );
LONG GoodID( long id );
LONG GoodType( long type );
STRPTR IDtoStr( long id, STRPTR buf );
void InitIFF( struct IFFHandle *iff, long flags, struct Hook *streamHook )
{
iff->iff_Flags = flags;
iff->iff_Hook = streamHook;
}
struct IFFHandle *AllocIFF( void )
{
return (struct IFFHandle *)calloc(1, sizeof(struct IFFHandle));
}
LONG OpenIFF( struct IFFHandle *iff, long rwMode )
{
return callIFFHook(iff, IFFCMD_INIT, NULL, 0);
}
LONG ParseIFF( struct IFFHandle *iff, long control )
{
return IFFERR_NOHOOK;
}
void CloseIFF( struct IFFHandle *iff )
{
callIFFHook(iff, IFFCMD_CLEANUP, NULL, 0);
}
void FreeIFF( struct IFFHandle *iff )
{
free(iff);
}
#else
static ULONG __saveds __asm hllDispatch(register __a0 struct Hook *hook,
register __a2 APTR object,
register __a1 APTR message)
{
return ((ULONG (*)(struct Hook *, APTR, APTR))hook->h_SubEntry)
(hook, object, message);
}
#endif
static ULONG iffFileHook(struct Hook *hook, APTR object, APTR message)
{
struct IFFStreamCmd *cmd = (struct IFFStreamCmd *)message;
switch(cmd->sc_Command) {
case IFFCMD_INIT:
return 0;
case IFFCMD_CLEANUP:
close(((struct IFFHandle *)object)->iff_Stream);
return 0;
case IFFCMD_READ:
return IFFERR_READ;
case IFFCMD_WRITE:
return IFFERR_WRITE;
case IFFCMD_SEEK:
return IFFERR_SEEK;
}
return 0;
}
LONG OpenIFFasFile( struct IFFHandle *iff, char *fn, char *mode )
{
static struct Hook hook =
#ifdef AMIGAOS
{ { 0, 0 }, hllDispatch, iffFileHook, 0 };
#else
{ { 0, 0 }, 0, iffFileHook, 0 };
#endif
int m, fd;
LONG r;
if((fd = open(fn, (strchr(mode, 'w')==NULL? O_RDONLY :
(O_WRONLY|O_TRUNC|O_CREAT)), 0666))<0)
return IFFERR_READ;
iff->iff_Stream = fd;
InitIFF( iff, (strchr(mode, 'w')==NULL? (m=IFFF_READ|IFFF_RSEEK) :
(m=IFFF_WRITE|IFFF_RSEEK)), &hook );
if((r=OpenIFF( iff, m ))!=0) {
close(fd);
return r;
}
return 0;
}