Re: newbie question: how to read a string from a MemHandle?

2003-08-14 Thread Gearoid Murphy 
correction, should be
err = MemHandleResize(h, MemHandleSize(h)+(len+1));

From: Gearoid Murphy [EMAIL PROTECTED]
Reply-To: Palm Developer Forum [EMAIL PROTECTED]
To: Palm Developer Forum [EMAIL PROTECTED]
Subject: Re: newbie question: how to read a string from a MemHandle?
Date: Thu, 07 Aug 2003 11:10:16 +0100

 err = MemHandleResize(MemHandleSize(h)+(len+1));
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Re: newbie question: how to read a string from a MemHandle?

2003-08-14 Thread Gearoid Murphy 
I'm not sure what you are doing wrong.  As I see it to write the data to the 
handle you should be doing something like the following:

// global MemHandle
MemHandle h = NULL;
// Append data to whatever is already in handle
void WriteDataToHandle(Char *dataInP)
{
   Char *strP;
   Err err;
   UInt16 len = StrLen(dataInP);
   if (!h)
   {
h = MemHandleNew(len+1);
if (h)
{
 strP = (Char *)MemHandleLock(h);
 if (strP)
 {
   StrCopy(strP, dataInP);
   MemHandleUnlock(h);
 }
}
   }
   else
   {
 err = MemHandleResize(MemHandleSize(h)+(len+1));
 if (!err)
 {
  strP = (Char *)MemHandleLock(h);
  if (strP)
  {
// Append data
StrCat(strP, dataInP);
MemHandleUnlock(h);
  }
 }
   }
}
// Read data from handle
void ReadDataFromHandle()
{
Char *strP = NULL;
if (h)
{
  strP = (Char *)MemHandleLock(h);
  if (strP)
  {
DisplayStr(strP);
MemHandleUnlock(h);
  }
}
}
// Finally free handle
MemHandleFree(h);
Regards,

Ger

From: blaman [EMAIL PROTECTED]
Reply-To: Palm Developer Forum [EMAIL PROTECTED]
To: Palm Developer Forum [EMAIL PROTECTED]
Subject: Re: newbie question: how to read a string from a MemHandle?
Date: Thu, 7 Aug 2003 11:30:08 +0200
at first thanx for your reply. However, when i try to access strP my
programm crashes telling me it read memory from the memory manager data
structures. Any idea what i did wrong? i locked the handle to write it,
unlocked it, locked it again by
strP = (Char *)MemHandleLock(h);

accessed strP and it crashed.

Gearoid Murphy [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]

 Char *strP;

 strP = (Char *)MemHandleLock(h); // h is a MemHandle


 if (strP)
 {
 // Do stuff with strP
 }

 // Make sure to unlock MemHandle
 MemHandleUnlock(h);


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Re: newbie question: how to read a string from a MemHandle?

2003-08-14 Thread blaman 
at first thanx for your reply. However, when i try to access strP my
programm crashes telling me it read memory from the memory manager data
structures. Any idea what i did wrong? i locked the handle to write it,
unlocked it, locked it again by

strP = (Char *)MemHandleLock(h);

accessed strP and it crashed.

Gearoid Murphy [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]

 Char *strP;

 strP = (Char *)MemHandleLock(h); // h is a MemHandle


 if (strP)
 {
 // Do stuff with strP
 }

 // Make sure to unlock MemHandle
 MemHandleUnlock(h);




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Re: newbie question: how to read a string from a MemHandle?

2003-08-11 Thread Gearoid Murphy 
Char *strP;

strP = (Char *)MemHandleLock(h); // h is a MemHandle

if (strP)
{
// Do stuff with strP
}
// Make sure to unlock MemHandle
MemHandleUnlock(h);


From: blaman [EMAIL PROTECTED]
Reply-To: Palm Developer Forum [EMAIL PROTECTED]
To: Palm Developer Forum [EMAIL PROTECTED]
Subject: newbie question: how to read a string from a MemHandle?
Date: Thu, 7 Aug 2003 10:54:17 +0200
hi everbody, i am new to palm and its memoryhandles.

I receive a string and have to store it in a MemHandle, because i resize it
in a loop while receiving the data. However, i´ve got no idea how to read
the data from the handle, neither a normal (char*) cast, nor a sprintf
works. I´m sure it is pretty easy but i don´t know how to do it :o|
thanx in advance, Jan Pfluger



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