Re: Truncate a string
Thank's so much, I am looking for WinDrawTruncChars exactly. Geoffrey -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: NONEDITABLE field.
How did your user manage to input the data into noneditable field? Rudla "Abid Velshi" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Hi All, > > Does anybody know of any problems that might occur if one were to obtain a > text pointer from a NONEDITABLE field? > > I seem to be getting the string "\n\b" from a field which the user has > inputted numeric data. The function which I use to obtain this string is: > > FldGetTextPtr() > > Using the same function, I am able to obtain text from an EDITABLE field. > > Any help would be much appreciated. > > Thanks, > Abid > > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: EvtEventAvail problem
It is generated repeatedly.
The loop, as it is written bellow, never ends.
Meanwhile, I solved the problem by using EvtGetEvent(&event, 0), which works
correctly.
I would however still like to know, if this is some bug in OS, or if i do
not understand the
API correctly.
Rudla
"Tim Kostka" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Are you saying the penUpEvent is being generated repeatedly or just once
> before the start of the loop? If it's just generated once, your device
> should go into snooze after one pass of the loop, and thus no problem.
>
> --
> Tim Kostka
> http://www.nuprograms.com
>
>
> "Rudla Kudla" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > Hi,
> >
> > a have problem with EvtEventAvail.
> > I read data from serial port and have Form with Cancel button open.
> > I want to cancel the reading, when the button is pressed.
> >
> > I test, if there is an event using EvtEventAvail.
> > If it is a perform SysHandleEvent and possibly FrmHandleEvent.
> >
> > Code for the progress function follows.
> >
> > It works OK on POSE. At real device (m515), it seems, that there is
ALWAYS
> > some event (event.eType == 2)
> > (Seems like penUp).
> >
> > How should I solve this problem?
> >
> > Rudla
> >
> > static Err CheckReadProgress(UInt32 bytes_to_now) /*
> >
> > Purpose:
> >
> > Serial port PortReadData progress function.
> >
> > Returns cancel, if the user pushed some button.
> >
> > */{
> >
> > UInt16 event_limit;
> >
> > UInt8 buffer[100];
> >
> > EventType event;
> >
> >
> > StrPrintF(buffer, "S:%ld", bytes_to_now);
> >
> > WinDrawChars(buffer, StrLen(buffer), 0,12);
> >
> > event_limit = 5;
> >
> > while (event_limit-- > 0 && EvtEventAvail()) {
> >
> > EvtGetEvent(&event, evtWaitForever);
> >
> >
> > ReportSubmessageInt("Event: %ld", event.eType);
> >
> >
> > if (event.eType == ctlSelectEvent) {
> >
> > return ErrUserCancel;
> >
> > }
> >
> > if (!SysHandleEvent(&event)) {
> >
> > FrmDispatchEvent(&event);
> >
> > }
> >
> > }
> >
> > return 0;
> >
> > }
> >
> >
> >
>
>
>
--
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Re: Truncate a string
At 11:12 PM 8/25/2004, you wrote: Hi all, May I ask if there are any existing API to truncate a string when the string is too long, like this: This is a very very very long string ==> This is a very very ... I know I can use StrLen and StrNCopy to do the same things, but I suspected there must be some exsiting APIs to do this. Hmmm... how do define too long? There are APIs to draw a truncated string on the screen -- WinDrawTruncChars comes to mind. To find the number of characters that can fit in a horizontal width, FntCharsInWidth is also useful. -- Ben Combee, DTS technical lead, PalmSource, Inc. "Combee on Palm OS" weblog: http://palmos.combee.net/ Palm OS Dev Fourm Archives: http://news.palmos.com/read/all_forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Truncate a string
At 09:12 PM 8/25/2004, "Geoffrey" <[EMAIL PROTECTED]> wrote: Hi all, May I ask if there are any existing API to truncate a string when the string is too long, like this: This is a very very very long string ==> This is a very very ... I know I can use StrLen and StrNCopy to do the same things, but I suspected there must be some exsiting APIs to do this. Can anyone give me some hints? Well, there's WinDrawTruncChars for just doing the ellipsis. If you're also interested in finding a line break, there is FntWordWrap. Various other Palm OS functions deal with this problem from different angles. And don't forget the humble ChrHorizEllipsis, the "right" way of getting your hands on an ellipsis character. -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: C++ Templates.
At 07:06 PM 8/25/2004, UCS308 wrote: I have some source code that implements Observer Notifier in C++ making heavy use of templates. While trying to compile it I get a lot (hundreds) of errors. I cannot tell if this is a compiler issue, configuration issue, or if it is just too hard for Codewarrior. Everything compiles well on Windows. Does anybody have any experience with Templates on CodeWarrior 9.0 ( I am using 9.2) for the the Palm? Would you be willing to take the source ( 1 example file, 1 header) and see if you can get it to compile? I am not asking you to fix broken code, just tell me if this should compile under 9.2 I generally find the CodeWarrior C++ compiler to be more standard-compliant (and capable) than, say, Visual C++. We use templates moderately extensively in our Palm code. Yes, I would be willing to see whether it compiles on my system. Greg Lutz NearSpace, Inc. -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Truncate a string
Hi all, May I ask if there are any existing API to truncate a string when the string is too long, like this: This is a very very very long string ==> This is a very very ... I know I can use StrLen and StrNCopy to do the same things, but I suspected there must be some exsiting APIs to do this. Can anyone give me some hints? Cheers, Geoffrey -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
C++ Templates.
I have some source code that implements Observer Notifier in C++ making heavy use of templates. While trying to compile it I get a lot (hundreds) of errors. I cannot tell if this is a compiler issue, configuration issue, or if it is just too hard for Codewarrior. Everything compiles well on Windows. Does anybody have any experience with Templates on CodeWarrior 9.0 ( I am using 9.2) for the the Palm? Would you be willing to take the source ( 1 example file, 1 header) and see if you can get it to compile? I am not asking you to fix broken code, just tell me if this should compile under 9.2 Thanks. -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Changing the name of the project
Thank you! I've found it! -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Changing the name of the project
At 07:58 PM 8/25/2004, you wrote: Thank you for your answer. I work with the CodeWarrior and the consturctor and still couldn't find where to change it... It's in the application resource settings that Constructor shows at the bottom of the resource hierarchy window for your .rsrc file. -- Ben Combee, DTS technical lead, PalmSource, Inc. "Combee on Palm OS" weblog: http://palmos.combee.net/ Palm OS Dev Fourm Archives: http://news.palmos.com/read/all_forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Changing the name of the project
Thank you for your answer. I work with the CodeWarrior and the consturctor and still couldn't find where to change it... Thank you in advanced for your help. Merav -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Unable to HotSync
August 25 Hi all, I am unable to HotSync from my m100 to desktop.Hotsync Log on m100 reads "HotSync operation was terminated.Some of you data was not backed up. An application on the PC failed to respond to a confimation query.The application may need to be restarted." HotSync log on desktop reads "HotSync error:An application failed to respond to a HotSync notification." How do I correct this to HotSync. Thanks in advance Aamir -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
NONEDITABLE field.
Hi All, Does anybody know of any problems that might occur if one were to obtain a text pointer from a NONEDITABLE field? I seem to be getting the string "\n\b" from a field which the user has inputted numeric data. The function which I use to obtain this string is: FldGetTextPtr() Using the same function, I am able to obtain text from an EDITABLE field. Any help would be much appreciated. Thanks, Abid -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Error : the file 'Windows.h' cannot be opened
At 04:59 PM 8/25/2004, you wrote:
Hello,
While trying to use the WinScreenMode () function on the Palm Emulator
with 4.2 ROM, I am getting the following error:
"Error : the file 'Windows.h' cannot be opened"
You mean when trying to compile your program, right?
You don't need to manually include , since it's pulled in by
. However, it seems likely that your project is misconfigured
and pulling in the wrong set of header files. Make sure your system access
paths include
{Compiler}Palm OS Support
{Compiler}CW for Palm OS Support
in that order, and before any other paths. Remove any path that is just
{Compiler}
as that is really inefficient and can pull in things you don't want.
-- Ben Combee, DTS technical lead, PalmSource, Inc.
"Combee on Palm OS" weblog: http://palmos.combee.net/
Palm OS Dev Fourm Archives: http://news.palmos.com/read/all_forums/
--
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Error : the file 'Windows.h' cannot be opened
Hello, While trying to use the WinScreenMode () function on the Palm Emulator with 4.2 ROM, I am getting the following error: "Error : the file 'Windows.h' cannot be opened" I am using Code Warrior. Any idea what my mistake is? Thanks, Jenni -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Palm V serial woes
Palm claims "true RS-232 levels" on most of their palms, but the V i have produces only about +/-5V. Is there a reference for exact level outputs per device. Does anyone have experience with the BTW, the device im connected to requires port power derived from DTR||RTS and RX||RTS. Ive found the V does provide power on these pins at +5V and -3V respectively. The V simply is not driving the optocouplers of the device hard enough. Works find with an emulator on the PC... thanks for any input. -bill -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Changing the name of the project
At 03:16 PM 8/25/2004, you wrote: Hello, I think I've done with the development! and now I would like the icon to have another name instead of "MyProject", can I do that? Alter the icon name resource. What tool are you using? If it's CodeWarrior, this is either specified in your main .rsrc file, in your .rcp file, or in the Palm OS 68K Project pref panel. -- Ben Combee, DTS technical lead, PalmSource, Inc. "Combee on Palm OS" weblog: http://palmos.combee.net/ Palm OS Dev Fourm Archives: http://news.palmos.com/read/all_forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
transfering pdb file to desktop
Hi guys, Can anyone tell me how I can transfer a database (pdb) file from the device to my desktop? I tried to play with the Hotsync options but couldn't find the clue! Thanks, Keyur. -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
palmgear activities
does anyone notice how palmgear is ripping developers off? an example. they have this go for the gold 25% off if you purchase 2 or more titles for them. this is great for customers but not for developers. it appears to me that the 25% is taken off directly from the developer and then palmgear applies their 30% - 40% commission. -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Changing the name of the project
Hello, I think I've done with the development! and now I would like the icon to have another name instead of "MyProject", can I do that? Thank you for all your help, Merav -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
palm game programming books?
Are there not any good palm game programming books availble somewhere. There is one palm game prog. book but its average user rating on amazon is like 1 star. Anybody have any recommendations for books or even internet resources? Thanks, Geoff -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: stack overflow error
[EMAIL PROTECTED] wrote: I have done the MemPtrNew function: ComDB *myData = (ComDB*) MemPtrNew (sizeof(ComDB)); StrCopy(myData->com1, "test"); then...code to save the records *snip* MemPtrFree(myData); When I run the program on POSE, the following message pops up. "MyProgram just read from memory location 0x000392E2 which is a in Memory Mgr data stuctures. These data structures include things like the headers preceding each block in heap, as well as the heap header itself. Such an access usually means that an application allocated a buffer (possibly with MemPtrNew) that wasn't large enough for its purpose. When the application then tries to write data to the buffer, it writes off the end of the buffer, accessing the start of the buffer following it in memory. " Then i click continue and i see that the data has been saved on myAlert. I guess I didnt have an error. But is this message warning me of an error? or is it only informational? Once you allocate the memory you then have to make sure that all of your reads/writes stay within the bounds of that allocated memory. Let's suppose that your structure contains nothing but the following: Char com1[4]; When allocating the structure, you have only set aside enough room for 4 bytes. The subsequent StrCopy command will copy 5 bytes (4 characters and a NULL at the end) to the structure, so it has then just written 4 characters to myData->com1 (OK), but it also wrote the trailing NULL outside of the structure (bad). This will give you the error message, and it may or may not crash the device. Check to make sure that all your reads/writes stay within the bounds. Bob. -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: stack overflow error
I have done the MemPtrNew function: ComDB *myData = (ComDB*) MemPtrNew (sizeof(ComDB)); StrCopy(myData->com1, "test"); then...code to save the records *snip* MemPtrFree(myData); When I run the program on POSE, the following message pops up. "MyProgram just read from memory location 0x000392E2 which is a in Memory Mgr data stuctures. These data structures include things like the headers preceding each block in heap, as well as the heap header itself. Such an access usually means that an application allocated a buffer (possibly with MemPtrNew) that wasn't large enough for its purpose. When the application then tries to write data to the buffer, it writes off the end of the buffer, accessing the start of the buffer following it in memory. " Then i click continue and i see that the data has been saved on myAlert. I guess I didnt have an error. But is this message warning me of an error? or is it only informational? -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Updating currupted PRCs
Hi folks! I wrote a updater system by FTP for PalmOS. I have a server where I put all the programs I want to update and the client using a PalmModem connect to it by FTP. The problem occours when the connection falls down while a downloading was performing, the PRC got corrupted in the client´s machine and, sometimes, we have to hard reset the machine to back normal. So, I need a way to doesn´t accept a corrupted PRC even we lost the downloading. Does anyone have any idea? Thanks Ricardo -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Treo 600 Simulator "Missing PhoneLib" errors
Wow. Completely missed that. Many thanks, Ben. Perhaps that could be added the docs (which I really did spend an excruciating amount of time searching for this). My suggestion would be in the "Treo 600 Developer Guide" Ch.29: "Debugging the Treoo 600 Smartphone by palmOne" section: "Treo 600 by palmOne version of the Palm-Simulator" as this is the section which addresses differences between this version of the simulators and others. (If you forward an enhancement request email address, I'll submit a request.) Thanks again. -- PS to Nikolai: Thank you for pointer and witty insight. I am obviously very stupid. I should not have expected to find something like this in an updated version of the "Treo 600 Developer Guide". I should not have expected to find it in something as unrelated as a document named "simulator usage notes.txt" or "TestingWithSimulator.pdf" I should instead read in detail a document named "Treo600_Simulator_History.txt" that directs me to the "Treo 600 Developer Guide" for more information before mentioning this feature. Thank heavens there is a support forum like this for doltish morons like myself. - On 2004-08-24 17:29:50 -0400, Ben Combee <[EMAIL PROTECTED]> said: At 03:59 PM 8/24/2004, you wrote: > My apologies if this is obvious or has been answered before. > > When starting up a Treo 600 emulator (Verizon CDMA Debug), a series of error messages > about the missing phone library are output by the Simulator: >e.g. > "Error getting Phone Library", > "Phone Lib failed to load". > > I understand that Treo600s have their own implementation of Phone Library (as well as > other libraries), so, You need to right click on the simulator, change the radio type to CDMA, and reboot the sim. -- Ben Combee, DTS technical lead, PalmSource, Inc. "Combee on Palm OS" weblog: http://palmos.combee.net/ Palm OS Dev Fourm Archives: http://news.palmos.com/read/all_forums/ -- == Will Rogers[EMAIL PROTECTED] == -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: nilEvent Timing
Edan, >in your loop you can call TimGetSeconds and compare it ... Correct. I was trying to elaborate a little, because to me this: >I force nil events to happen so I can get accurate timing. >just use: EvtSetNullEventTick implies that the nilEvents would then yield accurate timing without doing any other tests. Doug -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: nilEvent Timing
Doug, I agree with you.. but in your loop you can call TimGetSeconds and compare it with the last time it was in the loop and then you can only act on the events that take place every second or every 2 seconds.. you only need to make sure that you set the null events resolution to less than or equal to the number of seconds you want to act upon. as I said.. i dont know if this is the best way.. but it worked for me. Edan -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: big object allocation (was MTWK::__LoadAndRelocate__ problem)
Just fixed it useing :
#include "MemGlue.h"
void *operator new(UInt32 size) {
void *ptr = MemGluePtrNew(size);
MemSet(ptr, 0, size);
return ptr;
}
- Original Message -
From: "Chris Apers" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, August 25, 2004 4:22 PM
Subject: Re: big object allocation (was MTWK::__LoadAndRelocate__ problem)
> Ok, i found the problem, i'm allocation a big object (71k)
> with the new operator and it failed.
>
> Any way to allocate a big object (override the new operator)
> with all constructor call ?
>
> Thanks a lot
> Chris
>
>
> - Original Message -
> From: "Chris Apers" <[EMAIL PROTECTED]>
> To: "Palm Developer Forum" <[EMAIL PROTECTED]>
> Sent: Wednesday, August 25, 2004 2:58 PM
> Subject: MTWK::__LoadAndRelocate__ problem
>
>
> > Hi,
> >
> > When i run my program i have a :
> > Invalid read from 4F18
> >
> > The debugger stack shows :
> > __Startup__
> > MTWK::__LoadAndRelocate__(unsigned char,__opaque*)
> >
> > Source :
> > ...
> > ...
> > 03298038: 2F0Amove.l a2,-(a7)
> > 0329803A: 4E4Ftrap #15
> > 0329803C: A022sysTrapMemHandleUnlock
> > 0329803E: 584Faddq.w #4,a7
> > 03298040: 7010moveq#16,d0
> > 03298042: D880add.ld0,d4
> > 03298044: 5246addq.w #1,d6
> > 03298046: 2044movea.l d4,a0
> > 03298048: 4AA80004tst.l4(a0)
> > stop > 0329804C: 66D6bne.s
> MTWK::__LoadAndRelocate__(unsigned
> > char,_opaque*)+0x1b74 (0x3298024); 0x03298024
> > 0329804E: 4CDF0CF8movem.l (a7)+,d3-d7/a2-a3
> > 03298052: 4E5Eunlk a6
> > 03298054: 4E75rts
> >
> > Any idea ? Thanks !
> > Chris
> >
> > --
> > For information on using the Palm Developer Forums, or to unsubscribe,
> please see http://www.palmos.com/dev/support/forums/
> >
>
> --
> For information on using the Palm Developer Forums, or to unsubscribe,
please see http://www.palmos.com/dev/support/forums/
>
--
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Re: big object allocation (was MTWK::__LoadAndRelocate__ problem)
Somebody else has probably said this already, but why are you allocating a 71Kb object to start with? That must be one ugly looking object. Wouldn't it be better to look at breaking down the object into smaller parts rather than trying to use non-standard memory allocation to get round the problem? AFAIK, it is possible to use Feature memory on more recent PalmOS versions to allocate larger chunks, but that wouldn't be portable to older handhelds. Just my £0.02, Ben Roe Chris Apers wrote: Ok, i found the problem, i'm allocation a big object (71k) with the new operator and it failed. Any way to allocate a big object (override the new operator) with all constructor call ? Thanks a lot Chris - Original Message - From: "Chris Apers" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[EMAIL PROTECTED]> Sent: Wednesday, August 25, 2004 2:58 PM Subject: MTWK::__LoadAndRelocate__ problem Hi, When i run my program i have a : Invalid read from 4F18 The debugger stack shows : __Startup__ MTWK::__LoadAndRelocate__(unsigned char,__opaque*) Source : ... ... 03298038: 2F0Amove.l a2,-(a7) 0329803A: 4E4Ftrap #15 0329803C: A022sysTrapMemHandleUnlock 0329803E: 584Faddq.w #4,a7 03298040: 7010moveq#16,d0 03298042: D880add.ld0,d4 03298044: 5246addq.w #1,d6 03298046: 2044movea.l d4,a0 03298048: 4AA80004tst.l4(a0) stop > 0329804C: 66D6bne.s MTWK::__LoadAndRelocate__(unsigned char,_opaque*)+0x1b74 (0x3298024); 0x03298024 0329804E: 4CDF0CF8movem.l (a7)+,d3-d7/a2-a3 03298052: 4E5Eunlk a6 03298054: 4E75rts Any idea ? Thanks ! Chris -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: big object allocation (was MTWK::__LoadAndRelocate__ problem)
Ok, i found the problem, i'm allocation a big object (71k) with the new operator and it failed. Any way to allocate a big object (override the new operator) with all constructor call ? Thanks a lot Chris - Original Message - From: "Chris Apers" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[EMAIL PROTECTED]> Sent: Wednesday, August 25, 2004 2:58 PM Subject: MTWK::__LoadAndRelocate__ problem > Hi, > > When i run my program i have a : > Invalid read from 4F18 > > The debugger stack shows : > __Startup__ > MTWK::__LoadAndRelocate__(unsigned char,__opaque*) > > Source : > ... > ... > 03298038: 2F0Amove.l a2,-(a7) > 0329803A: 4E4Ftrap #15 > 0329803C: A022sysTrapMemHandleUnlock > 0329803E: 584Faddq.w #4,a7 > 03298040: 7010moveq#16,d0 > 03298042: D880add.ld0,d4 > 03298044: 5246addq.w #1,d6 > 03298046: 2044movea.l d4,a0 > 03298048: 4AA80004tst.l4(a0) > stop > 0329804C: 66D6bne.s MTWK::__LoadAndRelocate__(unsigned > char,_opaque*)+0x1b74 (0x3298024); 0x03298024 > 0329804E: 4CDF0CF8movem.l (a7)+,d3-d7/a2-a3 > 03298052: 4E5Eunlk a6 > 03298054: 4E75rts > > Any idea ? Thanks ! > Chris > > -- > For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: stack overflow error
John, the important thing to remember it that when you define a structure like... ComDB abc; ...it sets aside enough STACK space to hold the whole structure when your program tries to run. In fact, if you declare other instances of this structure in a whole bunch of places then the stack usage will grow and grow. The problem is that the stack size is dependant on the device, and it is a small fraction of the total available memory. If, instead, you do what Jan suggsests, and only declare a pointer to the structure (*abc), then the stack only holds the pointer, which is just a 4-byte address. Then, at runtime, you have to dynamically allocate enough memory to hold the structure. This is the MemPtrNew command. This dynamic allocation uses the data heap, and it is usually capable of holding much larger structures, depending on how much stuff is already loaded on the device. Does that make sense? Bob. Jan Slodicka wrote: 1. How can I decrease the stack usage for this function. How would I use the MemPtrNew to allocate it in the heap instead of the stack? Instead of ComDB abc ; use ComDB *abc = (ComDB*)MemPtrNew( sizeof(ComDB) ) ; ... MemPtrFree( abc ) ; 2. yes - as above -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
RE: [spam] stack overflow error
> 2. Also, this is the struct that I think is causing the stack overflow. It
is in the SaveFormDoCommand that I try to fill it up with data. I believe
that
> if I can reduce its stack usage, my problem is solved. Can aI lso use
MemPtrNew to allocate this struct in the heap instead of the stack? If so,
how can I
> go about it?
> typedef struct{
> char com1[30];
> ** snip **
> char com60[30];
> char com61[30];
> } ComDB;
I'm just guessing here being a Palm newbie, but since the usual C API way is
to do:
ComDB * mysavestruct = (ComDB*)malloc(sizeof(ComDB));
Then therefore the MemPtrNew way would be:
ComDB * mysavestruct = (ComDB*)MemPtrNew(sizeof(ComDB));
You'd access the variables using the -> operator i.e.
mysavestruct->com1[0]=0;
instead of:
mysavestruct.com1[0]=0;
If I'm wrong, I hope someone puts me right 'cos I'm bound to come across
this shortly.
Doesn't malloc() work in Palm like on all the other API sets?
Mark
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Re: stack overflow error
1. How can I decrease the stack usage for this function. How would I use the
MemPtrNew to allocate it in the heap instead of the stack?
Instead of
ComDB abc ;
use
ComDB *abc = (ComDB*)MemPtrNew( sizeof(ComDB) ) ;
...
MemPtrFree( abc ) ;
2.
yes - as above
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, August 25, 2004 3:40 PM
Subject: Re: stack overflow error
> Many thanks for all your help.
>
> I have set the stack pragma and I received the following compiler warning
message: 'function SaveFormDoCommand uses 2140 of stack'
>
> 1. How can I decrease the stack usage for this function. How would I use
the MemPtrNew to allocate it in the heap instead of the stack?
>
> 2. Also, this is the struct that I think is causing the stack overflow. It
is in the SaveFormDoCommand that I try to fill it up with data. I believe
that if I can reduce its stack usage, my problem is solved. Can aI lso use
MemPtrNew to allocate this struct in the heap instead of the stack? If so,
how can I go about it?
>
> typedef struct{
> char com1[30];
> char com2[30];
> char com3[30];
> char com4[30];
> char com5[30];
> char com6[30];
> char com7[30];
> char com8[30];
> char com9[30];
> char com10[30];
> char com11[30];
> char com12[30];
> char com13[30];
> char com14[30];
> char com15[30];
> char com16[30];
> char com17[30];
> char com18[30];
> char com19[30];
> char com20[30];
> char com21[30];
> char com22[30];
> char com23[30];
> char com24[30];
> char com25[30];
> char com26[30];
> char com27[30];
> char com28[30];
> char com29[30];
> char com30[30];
> char com31[30];
> char com32[30];
> char com33[30];
> char com34[30];
> char com35[30];
> char com36[30];
> char com37[30];
> char com38[30];
> char com39[30];
> char com40[30];
> char com41[30];
> char com42[30];
> char com43[30];
> char com44[30];
> char com45[30];
> char com46[30];
> char com47[30];
> char com48[30];
> char com49[30];
> char com50[30];
> char com51[30];
> char com52[30];
> char com53[30];
> char com54[30];
> char com55[30];
> char com56[30];
> char com57[30];
> char com58[30];
> char com59[30];
> char com60[30];
> char com61[30];
> } ComDB;
>
>
> Thanks in Advance.
>
>
> --
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please see http://www.palmos.com/dev/support/forums/
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Re: stack overflow error
Many thanks for all your help.
I have set the stack pragma and I received the following compiler warning message:
'function SaveFormDoCommand uses 2140 of stack'
1. How can I decrease the stack usage for this function. How would I use the MemPtrNew
to allocate it in the heap instead of the stack?
2. Also, this is the struct that I think is causing the stack overflow. It is in the
SaveFormDoCommand that I try to fill it up with data. I believe that if I can reduce
its stack usage, my problem is solved. Can aI lso use MemPtrNew to allocate this
struct in the heap instead of the stack? If so, how can I go about it?
typedef struct{
char com1[30];
char com2[30];
char com3[30];
char com4[30];
char com5[30];
char com6[30];
char com7[30];
char com8[30];
char com9[30];
char com10[30];
char com11[30];
char com12[30];
char com13[30];
char com14[30];
char com15[30];
char com16[30];
char com17[30];
char com18[30];
char com19[30];
char com20[30];
char com21[30];
char com22[30];
char com23[30];
char com24[30];
char com25[30];
char com26[30];
char com27[30];
char com28[30];
char com29[30];
char com30[30];
char com31[30];
char com32[30];
char com33[30];
char com34[30];
char com35[30];
char com36[30];
char com37[30];
char com38[30];
char com39[30];
char com40[30];
char com41[30];
char com42[30];
char com43[30];
char com44[30];
char com45[30];
char com46[30];
char com47[30];
char com48[30];
char com49[30];
char com50[30];
char com51[30];
char com52[30];
char com53[30];
char com54[30];
char com55[30];
char com56[30];
char com57[30];
char com58[30];
char com59[30];
char com60[30];
char com61[30];
} ComDB;
Thanks in Advance.
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MTWK::__LoadAndRelocate__ problem
Hi, When i run my program i have a : Invalid read from 4F18 The debugger stack shows : __Startup__ MTWK::__LoadAndRelocate__(unsigned char,__opaque*) Source : ... ... 03298038: 2F0Amove.l a2,-(a7) 0329803A: 4E4Ftrap #15 0329803C: A022sysTrapMemHandleUnlock 0329803E: 584Faddq.w #4,a7 03298040: 7010moveq#16,d0 03298042: D880add.ld0,d4 03298044: 5246addq.w #1,d6 03298046: 2044movea.l d4,a0 03298048: 4AA80004tst.l4(a0) stop > 0329804C: 66D6bne.sMTWK::__LoadAndRelocate__(unsigned char,_opaque*)+0x1b74 (0x3298024); 0x03298024 0329804E: 4CDF0CF8movem.l (a7)+,d3-d7/a2-a3 03298052: 4E5Eunlk a6 03298054: 4E75rts Any idea ? Thanks ! Chris -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Problem in Float to string conversion.
Tons of code samples to convert floating point to a string have been posted to this list. A quick search will get you what you need. - Original Message - From: "Dina" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[EMAIL PROTECTED]> Sent: Wednesday, August 25, 2004 8:35 AM Subject: Problem in Float to string conversion. > Hi, > I am using Palm OS5.0 and CW 9.3. > Why this part of the C code doesn't work in Palm > OS5.0? > > float a = 3.9; > char str[10]; > sprintf(str,"%f",a); > > I get the err "StringMgr doesnt support this". > > or > How can I convert a float value to String?? > > regards, > Dina. > > > > > __ > Do you Yahoo!? > New and Improved Yahoo! Mail - 100MB free storage! > http://promotions.yahoo.com/new_mail > > -- > For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Treo 600 Simulator "Missing PhoneLib" errors
Actually, Will, this is mentioned in the docs (Treo600Simulator_History.txt). You have to be thankful and read any TXT files, as most other simulators don't have any docs. ;-) Nikolai F. Handshigh Tech Support At 00:29 25.8.2004, you wrote: At 03:59 PM 8/24/2004, you wrote: My apologies if this is obvious or has been answered before. When starting up a Treo 600 emulator (Verizon CDMA Debug), a series of error messages about the missing phone library are output by the Simulator: e.g. "Error getting Phone Library", "Phone Lib failed to load". I understand that Treo600s have their own implementation of Phone Library (as well as other libraries), so, You need to right click on the simulator, change the radio type to CDMA, and reboot the sim. -- Ben Combee, DTS technical lead, PalmSource, Inc. "Combee on Palm OS" weblog: http://palmos.combee.net/ Palm OS Dev Fourm Archives: http://news.palmos.com/read/all_forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: stack overflow error
Subject: Re: stack overflow error
From: [EMAIL PROTECTED]
Date: Tue, 24 Aug 2004 14:02:20 -0400
Thanks Jan, you have been a great help..how do I set the stack pragma to
compile these critical functions?
...I found a way to somewhat resolve the problem. I have 3 fairly large
structs (about 60 variables). When I try to store all the data in one
form, thats when it gives me the stack overflow error. So I created
another save form and stored data to 2 of the large structs there, and it
didnt give me the error. However, it's still giving me a warning saying
that I am 'close' to overflowing the stack, but the program is still
running fine on the palm deviceI would still like to know how to check
for functions that are overflowing the stack however for my own knowledge.
I've never really tried to debug in a low source level.
What is the stack impact of these struct's ??
Are you doing:
struct FIELD_DEF {...} fields; /// wrong!!! , uses stack
or
struct FIELD_DEF (...) *pfields = NULL; // stack impact is 4 bytes
pfields = (struct FIELD_DEF *)
MemPtrNew (sizeof (struct FIELD_DEF) + 2);
if (pfields == NULL) { /* handle memory error */ return -1;}
MemSet ((MemPtr)pfields, sizeof (struct FIELD_DEF) + 2, 0);
// Note defensive programming techniques
...
...
...
MemPtrFree ((MemPtr)pfields; pfields = NULL;
return 1;
Roger Stringer
Marietta Systems, Inc. (www.rf-tp.com)
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Problem in Float to string conversion.
Hi, I am using Palm OS5.0 and CW 9.3. Why this part of the C code doesn't work in Palm OS5.0? float a = 3.9; char str[10]; sprintf(str,"%f",a); I get the err "StringMgr doesnt support this". or How can I convert a float value to String?? regards, Dina. __ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Palm OS 5 and Palm OS 4.1
Not exactly remove the armlet code - you can keep both the armlet and the
m68K code and decide (based on the onARM() function bellow) which of the
codes will be applied. Naturally, you have to remove all ARM-specific things
(e.g. endian conversions) from the m68K code.
The advantage of keeping both codes together is that you have just one
distribution package. The disadvantage = increased app size.
Regards,
Jan Slodicka
Boolean onARM()
{
UInt32 processorType;
// get the processor type
FtrGet(sysFileCSystem, sysFtrNumProcessorID, &processorType);
return sysFtrNumProcessorIsARM( processorType) ;
}
- Original Message -
From: "Shree S" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, August 25, 2004 12:20 PM
Subject: Palm OS 5 and Palm OS 4.1
>
> Hi all,
>
> I have developed an application for SDIO on palm OS 5.2.1. (devices
Tungsten and treo600). I have also used few armlets in my code.
> Now, I understand that if i have to run my application on palm os 4.1 i'll
have to remove the armlets.
>
> I want to know from you guys what else do i have to change to make it run
on palm 4.1. or my code will run directly without any modification(armlets
removed).
>
>
> --
> __
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>
> Powered by Outblaze
>
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What could cause exgErrBadLibrary
Hello, I got a user report stating exgErrBadLibrary error as a result of ExgPut (probably) or ExgSend call. The particular piece of code is used to pass the data to a registered handler (i.e. another application). The socket initialization: target points to the CreatorId of the receiving app length, time to obvious values localMode = 1 description = some text name = "_local:" The code was tested by many users and seems to be ok. Hence I suspect some strange setup of the user machine. (I asked the user, but don't have a reply yet.) The official Palm error official error text is "Couldn't find default exchange library". (Or without the word "default".) By browsing the web I found just one relevant mention (http://www.mail-archive.com/[EMAIL PROTECTED]/msg53219.html) where Keith Rollin admits such Palm bug in some early release of Palm OS 5. (I believe that it is solved by now.) Does anybody have some explanation? Thanks in advance. Jan Slodicka -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Palm OS 5 and Palm OS 4.1
Hi all, I have developed an application for SDIO on palm OS 5.2.1. (devices Tungsten and treo600). I have also used few armlets in my code. Now, I understand that if i have to run my application on palm os 4.1 i'll have to remove the armlets. I want to know from you guys what else do i have to change to make it run on palm 4.1. or my code will run directly without any modification(armlets removed). -- __ IndiaInfo Mail - the free e-mail service with a difference! www.indiainfo.com Check out our value-added Premium features, such as an extra 20MB for mail storage, POP3, e-mail forwarding, and ads-free mailboxes! Powered by Outblaze -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: stack overflow error
> Thanks Jan, you have been a great help..how do I set the stack pragma to
compile these critical functions?
Write the following line (you may select a lower threshold than 300 By) to
the source file (*.c) start or just before the function of interest.
#pragma warn_stack_usage 300
> However, it's still giving me a warning saying that I am 'close' to
overflowing the stack
You solved it for the time being, but it is still dangerous. Maybe you do
some change to your code in the future or the program will run on a weaker
machine with less stack space or some hack will be in the call sequence
taking part of the stack. (Other experts could judge it better...) I would
still try to decrease your stack usage.
Looks like you identified the dangerous places = the mentioned struct
instances. What about to allocate them on the heap (MemPtrNew) instead of
leaving them on the stack?
Roughly speaking stack usage in a particular function = sum of sizeof's for
all local variables. This isn't an exact statement as the compiler may do
its own decisions, but it is a good estimate.
Example:
int A()
{
char bufA[1024] ;
int a ;
//...
}
int B()
{
char bufb[1024] ;
double b ;
//...
// (1)
A() ;// (2)
// (3)
}
(1), (3) A() takes (roughly) 1026 By of the stack,
(2) During the call 1026+1032 By of the stack space are taken.
Jan
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Tuesday, August 24, 2004 8:02 PM
Subject: Re: stack overflow error
> Thanks Jan, you have been a great help..how do I set the stack pragma to
compile these critical functions?
>
> ...I found a way to somewhat resolve the problem. I have 3 fairly large
structs (about 60 variables). When I try to store all the data in one form,
thats when it gives me the stack overflow error. So I created another save
form and stored data to 2 of the large structs there, and it didnt give me
the error. However, it's still giving me a warning saying that I am 'close'
to overflowing the stack, but the program is still running fine on the palm
deviceI would still like to know how to check for functions that are
overflowing the stack however for my own knowledge. I've never really tried
to debug in a low source level.
>
> --
> For information on using the Palm Developer Forums, or to unsubscribe,
please see http://www.palmos.com/dev/support/forums/
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re: detecting warm reset
I am not quite sure I understand your requirements, but maybe two helpful hints: 1. register your app. for system reset with SysNotifyRegister: every warm reset will go through your application 2. check TimGetTicks(): this counter is reset to 0 upon every reset. Harry -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Is there any telephony event when a phone call is incoming?
Hi all, I am developing an application that needs to detect the incoming phone call. To solve this, one way is to use a timer and call TelGetCallState() api to check the telephone call state information in every timer loop. But I wonder whether there is any event or notification sent by palm system when a phone call is incoming. Waiting for your reply. Thank you very much. Best Regards, -- Ice -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
re: VFS Fragmentation?
Jeff, I believe that you are running into a VFAT cluster size problem. Each of your files is around 3KBytes, but I think that the cards use 16KByte clusters, thus your 1000 files will fill in a 16MB SD card. I am not sure if it can be done or if PalmOS would recognize it, but you can try to somehow reformat the card to use smaller cluster size (4K in your case). Natcho -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Re: Seeking API to fill a non-rectangular area
On Wed, Aug 25, 2004 at 03:27:08AM -0400 Luc Le Blanc [EMAIL PROTECTED] wrote: > I need to fill a trapezoidal area. i.e. a rectangle with unequal sides. > I see no API for that, nor something like "WinFillArea" that would color > every pixel around the given start location until hitting a different > color (like a paint tool in basic paint programs). Are there suitable > APIs for that, or is there a graphics shared library freely available to > do that? Hi, the best way is to tesselate the polygon (you don't care about covex/concave), and fill all the triangles you created. Filling a triangle is simple. /tom > -- > Luc Le Blanc > -- === Tomas Meinlschmidt, SBN3, MCT, MCP, MCP+I, MCSE, NetApp Filer & NetCache gPG fp: CB78 76D9 210F 256A ADF4 0B02 BECA D462 66AB 6F56 / $ID: 66AB6F56 GCS d-(?) s: a- C++ ULHISC*$ P+++> L+++$> E--- W+++$ N++(+) !o !K w(---) !O !M V PS+ PE Y+ PGP++ t+@ !5 X? R tv b+ !DI D+ G e>+++ h r+++ z+++@ === -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
re: How to draw low density bmp on high density display?
How about this: - BitmapTypeV3*bmP3=NULL; BitmapType *bmP=NULL; WinSetCoordinateSystem( kCoordinatesNative ); bmP3 = BmpCreateBitmapV3( bmP, kDensityDouble, BmpGetBits( bmP ), NULL ); WinDrawBitmap( (BitmapPtr) bmP3, x, y ); WinSetCoordinateSystem( kCoordinatesStandard ); - This code pieces work in my app as follows: bmp is a standard bitmap, of any dimension, or, say 320x320. It is converted into a V3 bitmap and then draw on the screen. One bitmap pix is one screen pix then -- I assume that is what you need. -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
Seeking API to fill a non-rectangular area
I need to fill a trapezoidal area. i.e. a rectangle with unequal sides. I see no API for that, nor something like "WinFillArea" that would color every pixel around the given start location until hitting a different color (like a paint tool in basic paint programs). Are there suitable APIs for that, or is there a graphics shared library freely available to do that? -- Luc Le Blanc -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
