enum and C preprocessor Post: 302556287

8 More Discussions You Might Find Interesting

1. Programming

what is the base type of enum

helo i have asked in exam what that what is the base type of enum options are given bewlo (1) long int (2) short int (3) signed int (4) unsigned int can u tell me what is the exact answer from the above option Regards, Amit

2. IP Networking

DNS ENUM RR interpretation

Hi Guys, This is really really urgent. Am looking out for some quick answers. I'm developing a DNS Resolver client that interprets DNS Query repsonses & pass on the needful to DNS applications. When an ENUM query(modified to an nslookup naptr query) is issued & an NAPTR RR(Resource Record)...

3. Programming

Preprocessor

Hi, Anyone please explain the functionality of ## in c. I didn't get the following preprocessor directives, # define LL(x) x ## LL # define LL(x) x ## i64 Thanks, Naga:cool:

4. Programming

enum in c++

#include <iostream> #include <stdio.h> using namespace std; typedef struct A { enum a{ red,blue,green}a; }obj11; obj11 obj1; int main() { //obj1.a=red; // how to set variable ? cout<<"sizeof struct is n"<<sizeof(obj1); cout<<"obj1.a is"<<obj1.a; if...

5. Programming

Preprocessor FILE for Debugging

Hi, Just wondering if it is possible to trim the file path output by __FILE__ preprocessor in my debugging line. Let's say my main.cpp file is found in C:\User\MyName\SystemA\Mod1\SubMod2\Test\main.cpp for __FILE__, I just want the filename - main.cpp to be printed, instead of the entire...

6. Programming

C- trying to code a 'spare array'; 'enum' fauled.

I am trying to implement a spare array in C that would be referenced by regular integers. Right away: define array for maximum possible index elements completely is not what I trying to get!!! It should be a construction that would have just 2 elements if I need to have just two indexes, like...

7. Programming

Mixed enum types - coverity defect

Hi All, I came across this error "MIXING ENUM TYPES" when I run my C program against the Coverity Tool. I've made many search relating to the error, but I didnt find the exact solution. Can anyone help me to overcome this.? Thanks in Advance.!!

8. Programming

Use #if not defined with OR boolean logic in preprocessor directives

I am currently using Linux CentOS and programming in FORTRAN 90 using Portland 7.1 compiler. I am able to set in the preprocessor directives a flag called TEST. when I go to use logic in my code i can write #ifdef TEST execute something #endif Furthermore, if I want to negate the...

LEARN ABOUT DEBIAN

bup-margin

bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
       entries.  This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.

       For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45.  That  means  a  46-bit
       hash  would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
       its first 46 bits.

       The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects.  Since SHA-1 hashes have 160 bits,
       that  leaves 115 bits of margin.  Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
       with far fewer objects.

       If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see	if
       you're getting dangerously close to 160 bits.

OPTIONS

       --predict
	      Guess  the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
	      from the guess.  This is potentially useful for tuning an interpolation search algorithm.

       --ignore-midx
	      don't use .midx files, use only .idx files.  This is only really useful when used with --predict.

EXAMPLE

	      $ bup margin
	      Reading indexes: 100.00% (1612581/1612581), done.
	      40
	      40 matching prefix bits
	      1.94 bits per doubling
	      120 bits (61.86 doublings) remaining
	      4.19338e+18 times larger is possible

	      Everyone on earth could have 625878182 data sets
	      like yours, all in one repository, and we would
	      expect 1 object collision.

	      $ bup margin --predict
	      PackIdxList: using 1 index.
	      Reading indexes: 100.00% (1612581/1612581), done.
	      915 of 1612581 (0.057%)

SEE ALSO

       bup-midx(1), bup-save(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-margin(1)