Retrieving values as text, back to numeric values

[paul.s...@telenet.be]

Hi All,


Writing values to a file as text separated with a comma works fine.
But for the inverse I can use some help:
retrieving these text values, one by one, and addressing them as a numeric value back to a variable, sounds unclear for me. I couldn't find anywhere a usefull demo...
Can somebody give me an example of (pseudo)code that will do? Thanks ahead!

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    iv00 =fopen( "C:\\FM\\Data\\Info_00.txt","w");    // This writes the values to a text file
////////////////////////////////////////
    for( y =0; y <Y; y++) {
    for( x =0; x <X; x++) {
////////////////////////////////////////
    iA0 =getArray( 0, x, y, 0);
    if( x ==X -1) {
    fprintf( iv00, "%d\n", iA0); }    // new line
    else {
    fprintf( iv00, "%d,", iA0); }    // comma separator
////////////////////////////////////////
    }}  // End_for_y, x
////////////////////////////////////////
    fclose( iv00);


And gives something like this as result:
24312,24365,24896,20774,17107,18041,17273, ...

[Ognen]

Hi Paul and a Happy New Year,

I don't know what your idea is in all this, but isn't it easier to write the value directly into the variable when you need it?

Maybe more explanation on what you want to achieve would make things clearer.

Regards,

Ognen

[paul.s...@telenet.be]

Hi Ognen,


Thanks for reponse!
It's for a study. The stored values as text could be reed and fed into Excel for further evaluation.

What I want is to reload some selected values back into FM. Thus reading a list of numbers in text format and feeding them to a selection of variables. I only need to know how to convert values as text into a number and how to shift the list.


Grtz,
Paul

---

Van: "Ognen" <gog...@gmail.com>
Aan: "FilterMeister Mailing List (FMML)" <filter...@googlegroups.com>
Verzonden: Dinsdag 10 januari 2023 01:10:46
Onderwerp: [FMML2] Re: Retrieving values as text, back to numeric values

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[paul.s...@telenet.be]

Hi All,
Ognen,


e.g.  24312,24365,24896,20774,17107,18041,17273, ...
What I want to obtain could be reduced to:

1.  Reading text blocks separated with a comma
2.  Converting the retrieved numbers as text back to integers

Eventually could I write first fixed text blocks as the equivalent of 4 bytes,
filled with binary numbers (as text),
if this would work easier to retrieve?

Hopefully this opens up a more viable solution?


Thanks,
Paul

---

Van: "paul simoens" <paul.s...@telenet.be>
Aan: "filtermeister" <filter...@googlegroups.com>
Verzonden: Dinsdag 10 januari 2023 13:09:19
Onderwerp: Re: [FMML2] Re: Retrieving values as text, back to numeric values

To view this discussion on the web visit https://groups.google.com/d/msgid/filtermeister/440160014.14351562.1673352559863.JavaMail.zimbra%40telenet.be.

[Ognen]

All I know for now is that you can't do it in FM, but maybe you will extract some information from the example below and will find it useful:

https://stackoverflow.com/questions/4118132/convert-a-set-of-chars-to-int-from-a-file

You have to use sscanf() function, which is supported by FM(only in 32bit version as well as the others that belong to stdio.h), but array functions such as getArray() aren't supported and it behaves very odd when you use it.

Regards,

Ognen

[Roberto]

Hi Paul,

On page 58+ of the FilterMeister Reference (epub file) are numerous file i/o functions described.

Nothing of any use there?

Roberto

Op Wed, 11 Jan 2023 18:44:02 +0100 schreef <paul.s...@telenet.be>:

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[paul.s...@telenet.be]

To Duncan, Ognan, Roberto and others,


Thanks for your reactions.
I have unfortunately little experience with coding of characters. Meanwhile I spent already days of trying things without any or reliable results. Although I'm convinced there must exist simple and elegant tricks to transfer characters back to integers?

Integers could be transferred and stored as text in little more than one line of code.
Is there e.g. nothing like converting characters into their VK_CODE? This would already do the job for me, certainly if I should use binary numbers. This would also allow a constant shift for reading the data. Again, to try this myself, characters and pointers are a grey zone for me, mostly due to the lack of completed examples that really work. If somebody could help me with this?


Another thing: Automatic naming?
When storing data as text, it would be comfortable if the name of the file could be automatic change to avoid overwriting. I found this chunck of code on the web, but I didn't succeed either to let it work in FM, although - as far I can judge - it uses code that is supported by FM.

    void RecordNumber()
    {
    srand( time( NULL) );
    FILE *fp;
    char name[ 64];
    int x,y;
    long num[ 256];
    int na =rand( );

    sprintf( name, "num[%d].dat", na);
    fp =fopen( name,"w");            // fp =fopen( name,"a");
    fclose( fp);
    }

    int main( ) {
    RecordNumber( );
    return 0;
    }

I don't expect a direct reply on this, but it would be great if somebody could find - inbetween the own activities - a working solution. And that can be added to the FM code snippets for general profit of all.

Regards,
Paul

---

Van: "Duncan Suss" <dunc...@gmail.com>
Aan: "paul simoens" <paul.s...@telenet.be>
Verzonden: Donderdag 12 januari 2023 02:15:48
Onderwerp: Re: [FMML2] Re: Retrieving values as text, back to integers

Hi Paul,

I don't know if FM has implemented the C function strtok, but I found this code snippet on stackoverflow which might point you in the right direction. I think you would have to first allocate a buffer, then read the line of text into the buffer, then parse the buffer contents using strtok. (Perhaps - it's been a long time since I wrote any code in FM or C.)

Best regards,

Duncan

#include <stdio.h>
#include <string.h>

int main ()
{
  char str[] ="hello, world, I, 287876, 6.0" ;
  char * pch;
  printf ("Splitting string \"%s\" into tokens:\n",str);
  pch = strtok (str,",");
  while (pch != NULL)
  {
    printf ("%s\n",pch);
    pch = strtok (NULL, ",");
  }
  return 0;
}

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