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# How to manipulate integer overflow in hexadecimal.(Ur gent)

19 New Member
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1. \$tmp  = 0xc0211082;
2.  \$tmp1 = 0xc0000082;
3.
Hello friends,
I got doubt when i am converting negative hexadecimal to a decimal number.Please look at mentioned example below.
In the below example my question is when i am converting an hexadecimal to an decimal number i am getting integer overflow in hexadecimal? But the actual values of \$tmp & \$tmp1 in decimal is signed numbers i.e -1071574910,-1073741694 respectively.
How to manipulate this type of situations?
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1.  \$tmp  = 0xc0211082;
2.  \$tmp1 = 0xc0000082;
3.
4.  \$tmp2_dec = hex(\$tmp);
5.  \$tmp3_dec = hex(\$tmp1);
6.
7.  printf("Decimal Value tmp is %d \n",\$tmp);
8.  printf("Decimal Value tmp1 is %d \n",\$tmp1);
9.  printf("Decimal Value tmp2 is %d \n",\$tmp2_dec);
10.  printf("Decimal Value tmp3 is %d \n",\$tmp3_dec);
11.
12. if(\$tmp2_dec >0 && \$tmp3_dec >0){
13. print("Temporary values are greater than Zero \n");
14. }else {
15. print("Temporary values are less than zero \n");
16. }
17.
Thanks
Raghavendra
Nov 1 '08 #1
5 6384
4,059 Recognized Expert Specialist
As the hex() functions manpage explains:

To convert strings that might start with either 0, 0x, or 0b, see oct .

http://perldoc.perl.org/functions/oct.html
Nov 1 '08 #2
raghavendrap
19 New Member
Hello,

Thanks
Raghavendra
Nov 3 '08 #3
4,059 Recognized Expert Specialist

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1. \$tmp2_dec = oct('0xc0211082');
2. \$tmp3_dec = oct('0xc0000082');
3.
4. print "\$tmp2_dec   \$tmp3_dec\n";
5.
6. \$t2 = sprintf "%d", \$tmp2_dec;
7. \$t3 = sprintf "%d", \$tmp3_dec;
8.
9. print "\$t2 \$t3\n";
10.
11. printf ("Decimal Value tmp is %d \n",\$tmp2_dec);
12. printf("Decimal Value tmp1 is %d \n",\$tmp3_dec);
13.
14. if(\$t2 > 0 && \$t3 > 0){
15.    print("Temporary values \$t2 and \$t3 are greater than Zero \n");
16. }else {
17.    print("Temporary values \$t2 and \$t3 are less than zero \n");
18. }
Nov 3 '08 #4
raghavendrap
19 New Member
Thank you very much kevin
Can u please provide me some useful links of perl, i need to write automation script for assembly instructions & need to generate .asm file..

Thanks
Raghvendra
Nov 4 '08 #5