/* produce a sparse image file */
int make_sparse_image(FILE *fp, Bit64u sec)
{
Bit64u numpages;
sparse_header_t header;
size_t sizesofar;
size_t padtopagesize;
memset(&header, 0, sizeof(header));
header.magic = htod32(SPARSE_HEADER_MAGIC);
header.version = htod32(SPARSE_HEADER_VERSION);
header.pagesize = htod32((1 << 10) * 32); // Use 32 KB Pages - could be configurable
numpages = (sec / (dtoh32(header.pagesize) / 512)) + 1;
header.numpages = htod32((Bit32u)numpages);
if (numpages != dtoh32(header.numpages))
{
fclose (fp);
fatal ("ERROR: The disk image is too large for a sparse image!");
// Could increase page size here.
// But note this only happens at 128 Terabytes!
}
if (fwrite(&header, sizeof(header), 1, fp) != 1)
{
fclose (fp);
fatal ("ERROR: The disk image is not complete - could not write header!");
}
fileset(fp, 0xff, 4 * dtoh32(header.numpages));
sizesofar = SPARSE_HEADER_SIZE + (4 * dtoh32(header.numpages));
padtopagesize = dtoh32(header.pagesize) - (sizesofar & (dtoh32(header.pagesize) - 1));
fileset(fp, 0, padtopagesize);
return 0;
}
searchnum(int num,char *name)
{
SCRN *lp;
char *p;
p = name;
while((p = strchr(p,'/')) != NULL) *p= '\\';
if(lng != ASM && strcmp(name,editfile[edfile].filename)) fileset(name,OFF);
for(lp = editfile[edfile].topline;lp->num != num;lp= lp->fwd) {
if(lp == NULL) {
msg("Illegal error file <illegal line number>\a");
return(NG);
}
}
line= lp;
curposy= disset((lastdisplay-widbase)/2);
curposx= 0;
return(OK);
}
