IP lister... - C / C++ / MFC Discussion Boards

Jens Doose13-May-04 3:46

13-May-04 3:46

If your using MFC one of the more common mistakes is that there is no command handler yet. In that case MFC grayes all the unavailable menu commands.

Jens

Re: Dymanic windows

Marcos Vinícius13-May-04 4:51

Marcos Vinícius

13-May-04 4:51

But, why is it unavailable? I can't just put a Message_Map in my class that handle the App MenuBar and that will enable the MenuItens?

Take a look in my last thread posted:
Menu at runtime (dynamic menu)

Thanks.

Marcos Vinícius

Newbie DLL Question

Hagiel9-May-04 4:37

Hagiel

9-May-04 4:37

okay here it goes ...

my app crashes cause of a DLL (coded correctly)
my DLL is accessing to a file, only to read ...
isn't it allowed to a dll to read a file? how to fix it ?

is there maybe another error?
Its a simply Win32 dll with CPP, Header and Def file
and my app is a console app (MFC apps crash too)

the debugger links me to "output.c"

if i write other console apps it crashes too ...

can any1 help me?

int main(int argc, char* argv[])<br />
{<br />
	if (argc < 2)<br />
	{<br />
		printf ("Usage is: <CharFile> \n");<br />
		getchar();<br />
		return 1;<br />
	}<br />
	char * output = "";<br />
	char hash[5] = "abcd"; // Some Decoding hash<br />
	char * outputfile = "";<br />
	sprintf(outputfile,"%s.txt",argv[1]);<br />
	FILE * fp = fopen(argv[1],"r");<br />
	FILE * f = fopen(outputfile,"wt");<br />
<br />
	if (!fp)<br />
	{<br />
		printf ("Error opening file %s\n", argv[1]);<br />
		getchar();<br />
		return 2;<br />
	}<br />
	int findex = 0;<br />
	unsigned char d;<br />
	while (!feof(fp)) <br />
	{<br />
        int c = fgetc(fp);<br />
        if (c == EOF) break;<br />
        unsigned char k = (hash[findex % 4] + findex) % 256;<br />
        d = c ^ (k | 0x80);<br />
		findex++;<br />
		output += (char) d;<br />
		fprintf(f,(const char *) d);<br />
	}<br />
	fclose(fp);	<br />
	fclose(f);<br />
	return 0;<br />
}

How to move caret around in characters in an Edit control?

Gary Shen9-May-04 4:33

Gary Shen

9-May-04 4:33

How can I move the caret in an CEdit control forward or backward in characters, not in coordinates?

SmileAgain

Re: How to move caret around in characters in an Edit control?

Ravi Bhavnani9-May-04 6:24

Ravi Bhavnani

9-May-04 6:24

Perhaps CEdit::SetSel (nCharPos, nCharPos, TRUE) ?

/ravi

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Splitter window question

Chakrdeep9-May-04 3:15

Chakrdeep

9-May-04 3:15

Hi,

I want to create the following splitters.

1. ParentSplitter - 2 cols and 1 row (vertical split)
- derives from CFrameWnd-SDI based
- 1st pane has a class derived from CTreeView (so this will be SDI-based)
- 2nd pane should be ChildSplitter

2. ChildSplitter - 2 rows and 1 col (horizontal split)
- derives from CMDIChildWnd-MDI based
- 1st pane and 2nd pane will derive from CFormView

So basically I want the parent to be SDI-based as its 1st pane (the TreeView) is SDI-based but its 2nd pane needs to be a MDI-based splitter. this application should look more or less like visual studio 6 having a tree on the left pane and double-clicking on a file should open a new window on the right pane ...

Can this be done? .. or is there any work-around for this concept .. If so can anyone plz guide me ...

thanks a lot

Re: Splitter window question

Ravi Bhavnani9-May-04 4:22

Ravi Bhavnani

9-May-04 4:22

I faked this by creating a standard MDI app, using a docking window for the tree view. My "tree view" is actually a dialog template that houses a tab control, which displays various views (tree, list) of the open "project". It seems you're trying to do the same thing.

/ravi

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IP lister...

S^nyp9-May-04 3:03

S^nyp

9-May-04 3:03

I made a simple prog in console that listed ALL the ip's that are possible... don't ask, and I stumbled onto a problem, I was storing those ip's into a txt file, but when the ip's were only on 1.0.0.0 the txt file was aproximatly 200mb, you know .2gb, anyways does anyone know how to make that file smaller or is that the smallest I can get?

Actual Linux Penguins were harmed in the creation of this message.

Re: IP lister...

Andrew Walker9-May-04 3:25

Andrew Walker

9-May-04 3:25

There are a few ways I can think of, but it's hard without more information.

1. Don't store it as text, save them as binary groups of four bytes
2. Only store the changes between each digit (0.0.0.[x0, x1, .. x254, x255], 0.0.1.[x0, x1, .. x254, x255], ...)
3. Don't save them at all, just generate them on the fly, this would be ideal but it depends on your situation.

If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.

Rudyard Kipling

Re: IP lister...

Ravi Bhavnani9-May-04 4:25

Ravi Bhavnani

9-May-04 4:25

Snyp wrote:
ALL the ip's that are possible...

I second Andrew's suggestion: there's no need to store these on disk - simply generate them on the fly.

/ravi

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Re: IP lister...

S^nyp9-May-04 4:28

S^nyp

9-May-04 4:28

I just wanted to do this for fun, to see what and how large it would be, I have a 30 gig hard drive and I calculated the document to come out aproximatly 50 gigs!!!! Big Grin | :-D

Actual Linux Penguins were harmed in the creation of this message.

Re: IP lister...

Paul Ranson10-May-04 1:13

Paul Ranson

10-May-04 1:13

You know there are 4 billion of them, generating them is like counting from 0-0xffffffff. Uncompressed binary storage would require 16GB.

But making a computer count from 0-4 billion seems rather pointless.

Paul

Re: IP lister...

David Crow10-May-04 3:23

David Crow

10-May-04 3:23

Paul Ranson wrote:
But making a computer count from 0-4 billion seems rather pointless.

That reminds me of the time I had two computers: a Commodore 64 (which had a clock speed of 1.02 MHz), and a 12 MHz AT-Compatible PC. I used to code up identical (sorting) programs in basic and watch them run. Yes it was pointless, and I never understood why the C64 never won at least a few times! It just didn't seem fair.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: IP lister...

David Crow10-May-04 3:18

David Crow

10-May-04 3:18

Unless you actually needed them for something, there are 2³² possible addresses, but not all of those are valid. Assuming each address is 15 bytes, you could store 13,981,013 within a 200MB file.

However, since an IP address is also a 32-bit value, you could store it as a 32-bit value instead. Now that 200MB file can store 52,428,800 addresses.

for (unsigned int x = 0; x < UINT_MAX; x++)
    fwrite(&x, sizeof(x), 1, ...);

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Memory allocation

Luis Ricardo9-May-04 2:06

Luis Ricardo

9-May-04 2:06

Hi, i want an article about memory allocation. What the best way to allocate memory in:
1. COM+;
2. COM;
3. Multithread enviroment ( COM e COM+);
5. i should use new and delete when ? heap ? malloc ?;
6. console aplication;
7. C and C++.

thanks for help.

Convert to UCS-2 ..

rasha20038-May-04 23:11

rasha2003

8-May-04 23:11

Hi all ..

How i can convert string "arabic" to UCS-2 encoding ?

Best Regards,
Rasha

Re: Convert to UCS-2 ..

Michael Dunn9-May-04 5:51

Michael Dunn

9-May-04 5:51

That depends on what encoding the source string is using. If it's in the ANSI code page, use MultiByteToWideChar()

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
You cannot truly appreciate Dilbert unless you've read it in the original Klingon.

Re: Convert to UCS-2 ..

rasha20039-May-04 8:20

rasha2003

9-May-04 8:20

no i am going to use Unicode character-coding where each char stored in 2 byte so i load my string like that :

wchar_t * pwszMyString = "This is my wide character string";

then if i am going to use MultiByteToWideChar() which code page i have to use to convert the string to UCS2 coding ? Blush | :O

Re: Convert to UCS-2 ..

Michael Dunn9-May-04 20:11

Michael Dunn

9-May-04 20:11

When you write:
wchar_t * pwszMyString = L"This is my wide character string";
(notice the L before the literal) that is already UCS-2.

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
You cannot stop me with paramecium alone!

Re: Convert to UCS-2 ..

rasha200310-May-04 5:09

rasha2003

10-May-04 5:09

ok until now i got the UCS-2 then how i can get the hex representation for each charachter in 2 byte ,, like
A
|
00 61
i tride that for english it works but in arabic like
ب
|
06 28 ( the right value i should have )

insted of this value i am getting
00 C8

this mean it keep using 1 byte as i think ? what is the logic i can use to get the correct value? Confused | :confused:

about allocator

vividtang8-May-04 21:16

vividtang

8-May-04 21:16

allocator is abstract to me,how do you understand it?please explain some for it,thanks
in addition,please look:(1) list<int> c1;
(2) list<int> c2(5,3);
(3) list<int> c3(3,1,c2.get_allocator());
my question:
A.(1) and (2) use the default allocator to construct list?
B. if A is yes,then (3) still use the default allocator only chaging a showing form.
C.if A,B are yes,then only we ourselves define allocator ,that way,if write get_allocator is really useful.
if i said above has wrong ,please rectify,thx! Roll eyes | :rolleyes:

Re: about allocator

toxcct9-May-04 5:54

toxcct

9-May-04 5:54

A -> YES.
B -> YES.
C : ... i don't know more about allocators, but if anybody here could answer about the aim of user defined allocators, that would help...

TOXCCT >>> GEII power

Newbie string question

MikeUofPhx8-May-04 17:00

MikeUofPhx

8-May-04 17:00

I am using fgets to get a character array, and then looping through to split it into words by spaces with strtok. For the next step, I am creating a control structure based upon those words. I seem to be able to get the first word but not the next using _strnicmp. It doesn't reuturn 0 when there is a match. I am assuming there is some control character involved that I'm not seeing. Part of the byte is that it has to be C (not C++) and use any non-standard libraries.

So, my question is - how do I do that
and 2, isn't tjhere a better way like a case statement with strings?

I would appreciate any help I can get. Thanks.

Here's the code I have so far:

<br />
// Text Adventure-Console.cpp : Defines the entry point for the console application.<br />
<br />
#include <stdio.h><br />
#include <stdlib.h><br />
#include <string.h><br />
#include <mbstring.h><br />
<br />
//Variables - global//<br />
<br />
char waitkey [10];<br />
char *pch;<br />
//enum directions {//<br />
<br />
// Defenitions - global //<br />
struct map {<br />
	char *name;<br />
	char *description;<br />
	int north;<br />
	int south;<br />
	int west;<br />
	int east;<br />
	int up;<br />
	int down;<br />
	int other;<br />
}; //Define the Map structure//<br />
struct map my_map[20] = {<br />
	{"Location0", "Dummy Location", 0,0,0,0,0,0,0},<br />
	{"Location1", "Admissions", 2,0,0,0,0,0,0},<br />
	{"Location2", "Lovely Lounge", 3,1,0,0,0,0,0},<br />
	{"Location3", "Main Hallway", 3,1,0,0,0,0,0},<br />
	{"Location4", "TV Room", 0,0,0,0,0,0,0},<br />
	{"Location5", "Mess Hall", 0,0,0,0,0,0,0},<br />
	{"Location6", "Crafts Room", 0,0,0,0,0,0,0},<br />
	{"Location7", "Therapy Room", 0,0,0,0,0,0,0},<br />
	{"Location8", "Padded Cell", 0,0,0,0,0,0,0},<br />
	{"Location9", "Mike's Room", 0,0,0,0,0,0,0},<br />
	{"Location10", "Nurse's Station", 0,0,0,0,0,0,0},<br />
	{"Location11", "Group Therapy Room", 0,0,0,0,0,0,0},<br />
	{"Location12", "Fenced Patio", 0,0,0,0,0,0,0},<br />
	{"Location13", "Showers", 0,0,0,0,0,0,0},<br />
	{"Location14", "Violent Ward", 0,0,0,0,0,0,0},<br />
	{"Location15", "Honest Politician's Ward", 0,0,0,0,0,0,0},<br />
	{"Location16", "Depressed College Student's Ward", 0,0,0,0,0,0,0},<br />
	{"Location17", "Phone Booth", 0,0,0,0,0,0,0},<br />
	{"Location18", "Secret Ritual Room", 0,0,0,0,0,0,0},<br />
	{"Location19", "Psychiatrist's Lounge", 0,0,0,0,0,0,0}<br />
	}; // Instantiate map structure with 19 "Rooms" as my map - 0 is a dummy//<br />
<br />
//Set current room//<br />
int current_room = 1;<br />
<br />
int main(int argc, char* argv[])<br />
{	<br />
//Display current room//<br />
printf("*** Josh's fantastic escape from the C Sanitarium for burnt out Coderz ***\n");<br />
printf("\n\n");<br />
printf("LOCATION     : %s\n", my_map[current_room].name);<br />
printf("DESCRIPTION  : %s\n",my_map[current_room].description);<br />
printf("WHAT'S HERE  :\n");<br />
printf("VISIBLE EXITS:");<br />
<br />
//What exits are visible?//<br />
if (my_map[current_room].north >= 1)<br />
    {<br />
        printf("North ");<br />
    }<br />
<br />
if (my_map[current_room].south >= 1)<br />
    {<br />
        printf(" South ");<br />
    }<br />
if (my_map[current_room].west >= 1)<br />
    {<br />
        printf(" West ");<br />
    }<br />
if (my_map[current_room].east >= 1)<br />
    {<br />
        printf(" East ");<br />
    }<br />
if (my_map[current_room].up >= 1)<br />
    {<br />
        printf(" Up ");<br />
    }<br />
if (my_map[current_room].down >= 1)<br />
    {<br />
        printf(" Down ");<br />
    }<br />
if (my_map[current_room].other >= 1)<br />
    {<br />
        printf(" Other ");<br />
    }<br />
printf("\n");<br />
//What would you like to do?//<br />
printf("\nWhat would you like to do?\n");<br />
char user_command[250];<br />
//Want whole sentence with EOL and secure buffer, so I go through the whole baloney here//<br />
fgets(user_command, sizeof(user_command), stdin);<br />
fflush(stdin); //Get rid of overflow above buffer limit//<br />
printf("\n");<br />
//Process Command//<br />
//Split in to words//<br />
 char *words[11];<br />
 int wordnumber = 0;<br />
char *pch;<br />
 pch = strtok (user_command, " ");<br />
 //Load the first word//<br />
 words[wordnumber]=pch;<br />
 //Load each additional word into words[]//<br />
 while ((pch != NULL) && (wordnumber < 10))// and word # is acceptable - add later//<br />
 {<br />
	 wordnumber++;<br />
	 words[wordnumber]=pch;<br />
	 pch = strtok (NULL, " ,.");<br />
 }<br />
//loop through//<br />
int count;<br />
 for(count=1;count<=wordnumber;count++)<br />
{<br />
	//Get last character, strcomp with enter, chomp<br />
	printf("**%s**\n",words[count]);<br />
}<br />
// //<br />
<br />
int result;<br />
char go[] = "go";<br />
result = _strnicmp(words[0], go, 2 );<br />
<br />
if (result==0)<br />
{<br />
	printf("You want to go somewhere\n");<br />
	//They're going - what direction?//<br />
	char north[] = "north";<br />
	char south[] = "south";<br />
	char west[] = "West";<br />
	char east[] = "east";<br />
	char up[] = "up";<br />
	char down[] = "down";<br />
	char other[] = "other";<br />
<br />
	int result;<br />
	result = _strnicmp(words[1], north, 5 );<br />
		if (result==0)<br />
		{<br />
		printf("You want to go north\n");<br />
		}<br />
	result = _strnicmp(words[1], south, 5 );<br />
		if (result==0)<br />
		{<br />
		printf("You want to go south\n");<br />
		}<br />
	result = _strnicmp(words[1], west, 4 );<br />
		if (result==0)<br />
		{<br />
		printf("You want to go west\n");<br />
		}<br />
	result = _strnicmp(words[1],east, 4 );<br />
		if (result==0)<br />
		{<br />
		printf("You want to go east\n");<br />
		}<br />
	result = _strnicmp(words[1], up, 2 );<br />
		if (result==0)<br />
		{<br />
		printf("You want to go up\n");<br />
		}<br />
	result = _strnicmp(words[1], down, 4 );<br />
		if (result==0)<br />
		{<br />
		printf("You want to go down\n");<br />
		}<br />
	result = _strnicmp(words[1], other, 5 );<br />
		if (result==0)<br />
		{<br />
		printf("You want to go north\n");<br />
		}<br />
}<br />
char blow[]="blow";<br />
result = _strnicmp(words[0], blow, 4 );<br />
if (result==0)<br />
{<br />
	printf("blow");<br />
}<br />
<br />
<br />
	return 0;<br />
}<br />

Re: Newbie string question

Anonymous8-May-04 20:27

Anonymous

8-May-04 20:27

You almost had it right! The problem lies in the organization of your while loop. Try this instead:

//Load each additional word into words[]//
while ((pch != NULL) && (wordnumber < 10))// and word # is acceptable - add later
{
     ++wordnumber;
     pch = strtok (NULL, " ,.");
     words[wordnumber]=pch;
} //loop through//

Regards,

Re: Newbie string question

John R. Shaw8-May-04 22:13

John R. Shaw

8-May-04 22:13

I to tired to study your code but I have the following comments:

First you need to use if else statments, because once a test has been passed there in no need for more testing. Second the comments are C++ comments, which start wit "//" and do not end with anything, although you are ending them with "//"; your comments in C should start with "/*" and end with "*/
".

Now you need to understand how strtok works!

while ((pch != NULL) && (wordnumber < 10))// and word # is acceptable - add later//
{
wordnumber++;
words[wordnumber]=pch;
pch = strtok (NULL, " ,.");
}

What strtock does is set a global pointer to the start of your string on the first call. When it finds a dilimeter it temporaraly replaceses it with a '\0' character and returns a pointer to the start of the token. On the next call it restores the delimiter, and sets the global pointer to the start of the next token (if any). It then looks for the next delimiter and repeats the process.

Note: The first argument is not a constant, what that means is it is changing the string (temporarily). If I typed in a string like so, "north south east west" then your code would produce the following strings:
1) "north south east west"
2) "south east west"
3) "east west"
4) "west"

To understand string functions, just sit down and recreate them!

I was going to write a quick strtok function to show you but it is after 4 AM here and my mind told me where I could put that idea (best not repeated here).

Good Luck!

INTP

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