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Infomagic - Games of Daze (Summer 1995) (Disc 1 of 2).iso
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lld_blob.c
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C/C++ Source or Header
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1995-03-14
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3KB
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132 lines
/* =======================================================================
LLD_BLOB.c Generic Doubly Linked Lists for Binary Large OBjects.
Linked Lists for variable size data-items.
This is a 'front end' for the generic LLD module.
v1.00 94-08-11
_____ This version is Public Domain.
/_|__| A.Reitsma, Delft, The Netherlands.
/ | \ --------------------------------------------------------------- */
#include <stdlib.h> /* for malloc() */
#include "lld.h" /* the generic LLD functions ... */
#include "lld_blob.h" /* also includes portable.h if necessary */
struct BlobDesc
{
void * data ; /* 'data' can be obtained by LLDnodePtr() ! */
unsigned size ;
};
#define ERR_MEMORY -1
/* ---- LL blob system mangement -------------------------------------- */
int LLDblobCreate( void )
{
return LLDcreate( sizeof( struct BlobDesc ));
}
/* ---- LL blob node mangement ---------------------------------------- */
int LLDblobInsert( int List, void * Source, unsigned Size )
{ /* insert _BEFORE_ current node */
struct BlobDesc Blob ;
Blob.size = Size ;
Blob.data = malloc( Size );
if( NULL == Blob.data )
{
return ERR_MEMORY ;
}
memcpy( Blob.data, Source, Size );
LLDnodeInsertFrom( List, & Blob );
return LIST_NO_PROBLEMS ;
}
int LLDblobAdd( int List, void * Source, unsigned Size )
{ /* insert _AFTER_ current node */
struct BlobDesc Blob ;
Blob.size = Size ;
Blob.data = malloc( Size );
if( NULL == Blob.data )
{
return ERR_MEMORY ;
}
memcpy( Blob.data, Source, Size );
LLDnodeAddFrom( List, & Blob );
return LIST_NO_PROBLEMS ;
}
int LLDblobPrepend( int List, void * Source, unsigned Size )
{ /* insert as first node */
struct BlobDesc Blob ;
Blob.size = Size ;
Blob.data = malloc( Size );
if( NULL == Blob.data )
{
return ERR_MEMORY ;
}
memcpy( Blob.data, Source, Size );
LLDnodePrependFrom( List, & Blob );
return LIST_NO_PROBLEMS ;
}
int LLDblobAppend( int List, void * Source, unsigned Size )
{ /* insert as last node */
struct BlobDesc Blob ;
Blob.size = Size ;
Blob.data = malloc( Size );
if( NULL == Blob.data )
{
return ERR_MEMORY ;
}
memcpy( Blob.data, Source, Size );
LLDnodeAppendFrom( List, & Blob );
return LIST_NO_PROBLEMS ;
}
void LLDblobDelete( int List )
{
struct BlobDesc Blob ;
LLDnodeDataTo( List, & Blob );
free( Blob.data );
LLDnodeDelete( List );
return ;
}
/* ---- stored data management ---------------------------------------- */
unsigned LLDblobData( int List, void * Destination )
{
struct BlobDesc Blob ;
LLDnodeDataTo( List, & Blob );
if( NULL != Destination )
memcpy( Destination, Blob.data, Blob.size );
return Blob.size ; /* size needed for blob */
}
/* ==== LLD_BLOB.c end =============================================== */