static int StateCompressAcb(struct BurnArea *pba)
{
// Set the data as the next available input
Zstr.next_in=(unsigned char *)pba->Data;
Zstr.avail_in=pba->nLen;
CompGo(0); // Compress this Area
Zstr.avail_in=0;
Zstr.next_in=NULL;
return 0;
}
// Compress a state using deflate
int StateCompress(unsigned char **pDef,int *pnDefLen,int bAll)
{
int nRet=0;
void *NewMem=NULL;
memset(&Zstr,0,sizeof(Zstr));
Comp=NULL;
nCompLen=0;
nCompFill=0; // Begin with a zero-length buffer
nRet=CompEnlarge(8*1024);
if (nRet!=0)
{
return 1;
}
nRet=deflateInit(&Zstr,Z_DEFAULT_COMPRESSION);
BurnAcb=StateCompressAcb; // callback our function with each area
BurnAreaScan(8|1,NULL); // scan nvram, read (from driver -> compress)
if (bAll)
{
BurnAreaScan(4|1,NULL); // scan volatile ram, read (from driver -> compress)
}
// Finish off
CompGo(1);
nRet=deflateEnd(&Zstr);
// Size down
NewMem=realloc(Comp,nCompFill);
if (NewMem!=NULL)
{
Comp=(unsigned char *)NewMem;
nCompLen=nCompFill;
}
// Return the buffer
if (pDef !=NULL)
{
*pDef =Comp;
}
if (pnDefLen!=NULL)
{
*pnDefLen=nCompFill;
}
return 0;
}
// Compress a state using deflate
int BurnStateCompress(unsigned char** pDef, int* pnDefLen, int bAll)
{
void* NewMem = NULL;
memset(&Zstr, 0, sizeof(Zstr));
Comp = NULL; nCompLen = 0; nCompFill = 0; // Begin with a zero-length buffer
if (CompEnlarge(8 * 1024)) {
return 1;
}
deflateInit(&Zstr, Z_DEFAULT_COMPRESSION);
BurnAcb = StateCompressAcb; // callback our function with each area
if (bAll) BurnAreaScan(ACB_FULLSCAN | ACB_READ, NULL); // scan all ram, read (from driver <- decompress)
else BurnAreaScan(ACB_NVRAM | ACB_READ, NULL); // scan nvram, read (from driver <- decompress)
// Finish off
CompGo(1);
deflateEnd(&Zstr);
// Size down
NewMem = realloc(Comp, nCompFill);
if (NewMem) {
Comp = (unsigned char*)NewMem;
nCompLen = nCompFill;
}
// Return the buffer
if (pDef) {
*pDef = Comp;
}
if (pnDefLen) {
*pnDefLen = nCompFill;
}
return 0;
}
