Thanks a lot Richard... I really appreciate all the help you gave me...
Best Wishes,
Nicolas
-----Mensaje original-----
De: Richard Burmeister <[EMAIL PROTECTED]>
Para: Palm Developer Forum <[EMAIL PROTECTED]>
Fecha: Mi�rcoles, 25 de Abril de 2001 07:22 p.m.
Asunto: RE: DmNewRecord
>> From: Nicolas Raitman
>>
>> Richard, thanks a lot I will try that, but suppose that I would like to
>> write the entire structure, could I do the followig?
>>
>> DmWrite( JugadorPtr, 0, Jugador, size);
>>
>> or not? What should I do instead?
>
>No, your structure contains two pointers:
>
> typedef struct
> {
> char * Nombre;
> char * NickName;
> } JugadorType;
>
>and in your code, Jugador points to one string, not to the structure.
There
>is no guarantee that the second string actually exists in memory
immediately
>following the first string.
>
>If you want to save two strings in a single database record, you have two
>options:
>
>1. Create a struct that holds two arrays of Chars and save that in your
>database:
>
> typedef struct
> {
> Char Nombre[22];
> Char NickName[10];
> } JugadorType;
>
>This method makes it very easy to read and write the entire structure to
the
>database. It has two big problems, however: (a) you have to know the
>maximum size of each string at compile time, and (b) every record uses the
>same amount of space, even if the names you store are short.
>
>2. Pack the two strings together into a single record and save that. I.e.,
>in the database you would store the two strings packed together like this:
>
>Senor Delgato\0Cat\0
>
>then when you read the database record, you have to unpack it to get back
>two strings.
>
>To see examples of how this is done, take a look at Neil Rhodes' book
online
>at http://www.palmos.com/dev/tech/docs/devguide/TableOfContents.htm or buy
a
>good book on Palm database programming. There are several books listed at
>palmos.com.
>
>
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