Function to find all logical partitions' information reading their partition entry

/* ***** check for active partition ***** */

if(*sec==se && *no_par==0) /*if primary partition */
{
*sec=se=0;
for(active_offset=446;active_offset<=494;active_offset+=16)
{
active_par=buffer[active_offset];

if(active_par==0x80) /* check for active partition */
break;
else
active_pos++; /* position of active partition */
}

/* for extended partition */

for(active_offset=450;active_offset<=511;active_offset+=16)
{
active_par=buffer[active_offset];

if(active_par==0x05 | active_par==0x0F)
/*check for extended partition */
break;
else
extended_pos++; /*position of extended partition */
}

if(active_pos==4)
active_pos=1;

if(extended_pos==4)
extended_pos=1;

partloc1=0x1C0+extended_pos*16;

}
else
{
active_pos=0;
extended_pos=1;
partloc1=0x1D0;

if(se_p!=0)
{
*sec=se=se_p; /*starting of extended partition */
}
}

/* Relative Sectors in partition */

relative_sec= *(unsigned long *)(buffer+454+active_pos*16);

/* Number of Sectors in Partition */

no_sectors=*(long *)(buffer+458+active_pos*16);

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