• Tyro (26/26) Dec 21 2004 I have the following:
• Simon Buchan (15/41) Dec 21 2004 whats wrong with argptr = _argptr again?
• Tyro (6/41) Dec 21 2004 With every incrementation, I have modified argptr.
• Simon Buchan (20/31) Dec 21 2004 Hmm, I don't get it... how can you assign values to a void*, then
• Georg Wrede (7/48) Dec 22 2004 This really looks like using a wrench where

Tyro <ridimz_at yahoo.dot.com> writes:

I have the following:

void foo(...)
{
   void* argptr = _argptr;
   foreach(TypeInfo ti; _arguments)
   {  if(ti == typeid(char[]))
      { /* do something */
        argptr += (char[]).sizeof;}
      else if(ti == typeid(sometype))
      { /* do something else */
        argptr += (sometype).sizeof;}
   }
   /+
   At this point the pointer should be pointing
   just beyond the last argument. My question
   question is how do I get it back to where it
   was when I initially entered this function?

   I have tried decrementing the pointer with:
      foreach(TypeInfo ti; _arguments)
        if(ti == typeid(sometype))
          argptr -= sometype.sizeof;
   but that doesn't help at all.
   +/
}

thanks for your assistance.
Andrew

"Simon Buchan" <currently no.where> writes:

On Tue, 21 Dec 2004 06:24:54 -0500, Tyro <ridimz_at yahoo.dot.com> wrote:

 I have the following:

 void foo(...)
 {
    void* argptr = _argptr;
    foreach(TypeInfo ti; _arguments)
    {  if(ti == typeid(char[]))
       { /* do something */
         argptr += (char[]).sizeof;}
       else if(ti == typeid(sometype))
       { /* do something else */
         argptr += (sometype).sizeof;}
    }
    /+
    At this point the pointer should be pointing
    just beyond the last argument. My question
    question is how do I get it back to where it
    was when I initially entered this function?

    I have tried decrementing the pointer with:
       foreach(TypeInfo ti; _arguments)
         if(ti == typeid(sometype))
           argptr -= sometype.sizeof;
    but that doesn't help at all.
    +/
 }

 thanks for your assistance.
 Andrew

whats wrong with argptr = _argptr again?

-- 
"Unhappy Microsoft customers have a funny way of becoming Linux,
Salesforce.com and Oracle customers." - www.microsoft-watch.com:
"The Year in Review: Microsoft Opens Up"
--
"I plan on at least one critical patch every month, and I haven't been  
disappointed."
- Adam Hansen, manager of security at Sonnenschein Nath & Rosenthal LLP
(Quote from http://www.eweek.com/article2/0,1759,1736104,00.asp)
--
"It's been a challenge to "reteach or retrain" Web users to pay for  
content, said Pizey"
-Wired website: "The Incredible Shrinking Comic"

Tyro <ridimz_at yahoo.dot.com> writes:

Simon Buchan wrote:
 On Tue, 21 Dec 2004 06:24:54 -0500, Tyro <ridimz_at yahoo.dot.com> wrote:
 
 I have the following:

 void foo(...)
 {
    void* argptr = _argptr;
    foreach(TypeInfo ti; _arguments)
    {  if(ti == typeid(char[]))
       { /* do something */
         argptr += (char[]).sizeof;}
       else if(ti == typeid(sometype))
       { /* do something else */
         argptr += (sometype).sizeof;}
    }
    /+
    At this point the pointer should be pointing
    just beyond the last argument. My question
    question is how do I get it back to where it
    was when I initially entered this function?

    I have tried decrementing the pointer with:
       foreach(TypeInfo ti; _arguments)
         if(ti == typeid(sometype))
           argptr -= sometype.sizeof;
    but that doesn't help at all.
    +/
 }

 thanks for your assistance.
 Andrew

 
 
 whats wrong with argptr = _argptr again?
 

With every incrementation, I have modified argptr.
Therefore, simply assigning it the values of _argptr
will destroy the new values I've just assigned it.

I want to get back to the beginning of argptr which
now contains the new values I inserted.

"Simon Buchan" <currently no.where> writes:

On Tue, 21 Dec 2004 06:46:04 -0500, Tyro <ridimz_at yahoo.dot.com> wrote:

 Simon Buchan wrote:
 On Tue, 21 Dec 2004 06:24:54 -0500, Tyro <ridimz_at yahoo.dot.com>  
 wrote:


<snip>
   whats wrong with argptr = _argptr again?

 With every incrementation, I have modified argptr.
 Therefore, simply assigning it the values of _argptr
 will destroy the new values I've just assigned it.

 I want to get back to the beginning of argptr which
 now contains the new values I inserted.

Hmm, I don't get it... how can you assign values to a void*, then
want to move it back to the start? The ONLY information a void* holds
is its location, by definition.

Is what you want to create a new void* with the values of the args
memcpy'ed after it?

-- 
"Unhappy Microsoft customers have a funny way of becoming Linux,
Salesforce.com and Oracle customers." - www.microsoft-watch.com:
"The Year in Review: Microsoft Opens Up"
--
"I plan on at least one critical patch every month, and I haven't been  
disappointed."
- Adam Hansen, manager of security at Sonnenschein Nath & Rosenthal LLP
(Quote from http://www.eweek.com/article2/0,1759,1736104,00.asp)
--
"It's been a challenge to "reteach or retrain" Web users to pay for  
content, said Pizey"
-Wired website: "The Incredible Shrinking Comic"

Georg Wrede <Georg_member pathlink.com> writes:

In article <cq92dt$2noi$1 digitaldaemon.com>, Tyro says...
Simon Buchan wrote:
 On Tue, 21 Dec 2004 06:24:54 -0500, Tyro <ridimz_at yahoo.dot.com> wrote:
 
 I have the following:

 void foo(...)
 {
    void* argptr = _argptr;
    foreach(TypeInfo ti; _arguments)
    {  if(ti == typeid(char[]))
       { /* do something */
         argptr += (char[]).sizeof;}
       else if(ti == typeid(sometype))
       { /* do something else */
         argptr += (sometype).sizeof;}
    }
    /+
    At this point the pointer should be pointing
    just beyond the last argument. My question
    question is how do I get it back to where it
    was when I initially entered this function?

    I have tried decrementing the pointer with:
       foreach(TypeInfo ti; _arguments)
         if(ti == typeid(sometype))
           argptr -= sometype.sizeof;
    but that doesn't help at all.
    +/
 }

 thanks for your assistance.
 Andrew

 
 
 whats wrong with argptr = _argptr again?
 

With every incrementation, I have modified argptr.
Therefore, simply assigning it the values of _argptr
will destroy the new values I've just assigned it.

I want to get back to the beginning of argptr which
now contains the new values I inserted.

This really looks like using a wrench where
a hammer should be used. (Or the other way 'round.)

Instead of answering your question, maybe we should try
to find out _what_ and _why_ you are trying to do?

For example, if you want to change the strings, why
don't you copy them into another array?