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Ok so you should use the functions of CPallini. They should work.
Greetings
Covean
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YOu may use ftell [^] and fseek [^]for the purpose.
Or you may use filelenght [^] (however you should pass a file descriptor to filelenght).
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Thanks. The idea I'm getting from you is to seek to the end of the file and use ftell() to give me the size. I believe that's what you are saying.
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You can do that, but that impliesm opening the file for (at least) read access. You could also use the _stat function.
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Never met this _stat function before. Which header file is its prototype and how do I use it?
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Based on what you told me I wrote the following function and it's working.
long get_file_size(FILE* fp)
{
fseek(fp, 0L, SEEK_END);
return (ftell(fp));
}
I checked the return value and compared with the size of a file read. It was correct. Thanxxx!
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You are welcome.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Dan_K wrote:
long get_file_size(FILE* fp)
{
fseek(fp, 0L, SEEK_END);
return (ftell(fp));
}
It was years ago i used these but didn't fseek() return the bytes, so:
long get_file_size(FILE* fp)
return (fseek(fp, 0L, SEEK_END));
Does the same? And wasn't Ftell() not enough?
long get_file_size(FILE* fp)
return (ftell(fp));
So this one does the same? Or I'm getting old?
Rozis
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Small FYI. If you are going to read a file entirely into memory, buffered I/O (i.e. fopen()) is redundant.) If you want to stay with the CRT, you are better off using the _open()/_filelength()/_read() functions. (I just use the raw Win32 calls, but all my work is highly Windows specific.)
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Hi All,
Can anyone provide me example for using zend library in vc++. I have to pass c++ object to php script is my requirement.
looking ahead for reply.
Thanks A Ton
Ash_VCPP
walking over water is just knowing where the stones are.....
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Hi,
there is a tool to generate wrappers to call C/C++ from PHP and other script languages called SWIG ( see: http://www.swig.org[^] ). I've used it a few times to generate wrappers for perl.
Hope this helps.
Frank
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Hi Frank,
Can i use Zend library to do the same because i have done some rnd on it. so if u know anything about it yhen please let me know.
Thanks A Ton
Ash_VCPP
walking over water is just knowing where the stones are.....
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Hi,
Now I use a driver (first part of the code) - no changes possible.
I have to use something like a message processing and because I'm unable to use an array of the internal buffers of the driver -> I use more then 10 function with the same code.
here is my code
I would like to use a vector of messages (message0, message1 ..).
any other ideea is welcome of grouping these data types.
thanks
<pre>// Gateway_array.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType0;
typedef union
{
unsigned char _c[8];
msgType0 msg0_0;
} buf0;
buf0 message0;
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType1;
typedef union
{
unsigned char _c[8];
msgType1 msg0_1;
} buf1;
buf1 message1;
/// ................................
/// UP is the Driver .. No changes possible
// X 8 times
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType;
typedef union
{
unsigned char _c[8];
msgType msg;
} type_array;
type_array Vector[2]; // i would like to use a vector like this one
int main(int argc, char* argv[])
{
Vector[0] = message0; //error when using it
return 0;
}
</pre>
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Why don't you define type_array as union of {buf1, .., buf8}?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Hi
with a union like this doesn't work either.
I get ..cannont convert buf0 to unsigned char.
typedef union
{
buf0 msg0;
buf1 msg1;
} type_Array;
type_Array Vector[]={message0 , message1};
if i put like this, works:
unsigned char x1;
unsigned char x2;
type_Array Vector[]={x1, x2};
//(this doesn't seem to be logic i should have here a vector of 8 unsigned chars)
so, the problem is
the compiler see message0 of type buf0, somehow cannot use union definition.
msgType0 and msgType1 are user defined types.
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Why you want to assign a unsigned char to a msgType0? It looks more reasonable something like
msgType0 msg;
unsigned char x = 0x20;
msg.signal0 = x;
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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yes, true
my problem is I cannot build the array with this code:
/// Driver
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType0;
typedef union
{
unsigned char _c[8];
msgType0 msg0_0;
} buf0;
buf0 message0;
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType1;
typedef union
{
unsigned char _c[8];
msgType1 msg0_1;
} buf1;
buf1 message1;
/// ................................
/// UP is the Driver .. No changed possible
// X 8 times
// seems logic to work with this code
typedef union
{
buf0 msg0;
buf1 msg1;
} type_Array;
type_Array Vector[]={message0 , message1};
so, I want to build an array of message0, message1....
not other data.
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hi
the ideea was ok. my sintax was not
this code is ok:
// diff types array.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType0;
typedef union
{
unsigned char _c[8];
msgType0 msg0_0;
} buf0;
buf0 message0;
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType1;
typedef union
{
unsigned char _c[8];
msgType1 msg0_1;
} buf1;
buf1 message1;
/// ................................
/// UP is the Driver .. No changed possible
// X 8 times
int main(int argc, char* argv[])
{
printf("Hello World!\n");
typedef union
{
buf0 msg0;
buf1 msg1;
} type_Array;
type_Array X1;
type_Array X2;
X1.msg0= message0;
X2.msg1= message1;
type_Array Vector[2];
Vector[0]= X1;
Vector[1]= X2;
return 0;
}
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hi
(again what I would like to have is an array of message0, message1...)
please give me a clue if any
I thought I solved it.. unfortunally I cannot refer the buffer I need.
I need message0._c[0] these buffer to refer to.
the only way is with sintax: Vector[0].msg0._c[0]=1; //ok // not usefull
i have to apppend .msg0 which is not usefull
// diff types array.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType0;
typedef union
{
unsigned char _c[8];
msgType0 msg0_0;
} buf0;
buf0 message0;
typedef struct
{
unsigned char signal7 : 8;
unsigned char signal6 : 8;
unsigned char signal5 : 8;
unsigned char signal4 : 8;
unsigned char signal3 : 8;
unsigned char signal2 : 8;
unsigned char signal1 : 8;
unsigned char signal0 : 8;
} msgType1;
typedef union
{
unsigned char _c[8];
msgType1 msg0_1;
} buf1;
buf1 message1;
/// ................................
/// UP is the Driver .. No changed possible
// X 8 times
int main(int argc, char* argv[])
{
printf("Hello World!\n");
union type_Array
{
buf0 msg0;
buf1 msg1;
} ;
type_Array X1;
type_Array X2;
X1.msg0= message0;
X2.msg1= message1;
type_Array Vector[2];
Vector[0]= X1;
Vector[1]= X2;
// what i would like to refer is this buffer message0._c[0]
message0._c[0]= 1;
Vector[0]._c[0]=1; //imposible to use because of refering msg0
//Vector[0].msg0._c[0]=1; //ok // not usefull
return 0;
}
modified on Thursday, January 21, 2010 11:34 AM
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Why isn't it useful?
A dirty trick would be
union type_Array
{
unsigned char _c[8];
buf0 msg0;
buf1 msg1;
} ;
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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isn't usefull either because I have to modify the driver. The upper section until // /// UP is the Driver .. No changes possible
// X 8 times
I cannot modify!
because of these individual buffers of the driver ... insted of writing a SINGLE! Processing message function - for all messaging (involving these individual buffers) (it is the same code) - I have a dozen function making same thing.
Inside them I refer to buffers like message0._c[(i=1,n)]= value; , next function message1._c[(i=1,n)]= value etc.
If i would have an ARRAY of message0, message1, I would write a single function.
with my previous code I would refer these buffers with Vector[0].msg0._c[0]=1; //ok // not usefull
But how do I put in the code line section msg0? the above line would be in a for.
Maybe I was more clear explaiing my problem this time.
I think the problem here is, basically I have a union inside a union.
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Is the following snippet of MFC code similar to the DoEvents() functionality in Visual Basic?
MSG msg;
if(PeekMessage(&msg, AfxGetMainWnd()->m_hWnd, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
---
![Beer | [beer]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/beer.gif) Hakuna-Matata
It means no worries for the rest of your days...
It's our problem free, Philosophy
![Jig | [Dance]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/jig.gif)
"I think my response was 'What idiot dreamed this up?'" -- Mary Ann Davidson, Oracle's chief security officer, in typical blunt manner, remembering her reaction to the company's scheme to brand its databases as "unbreakable."
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Its a long time ago I wrote a message loop but this looks good.
But do this in a while loop (because you should process all messages in the queue) till PeekMessage
returns 0 (so no more messages are available). And maybe you should process the WM_QUIT message.
Greetings
Covean
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I don't know about all details of the DoEvents in VB but this code is doing something similar: it allows you to let the UI not freeze even if you are doing lenghty calculations.
But everything should be explained quite in details in the article I gave you.
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