CQDFRTVFD

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Introduction

C version of the RPG prpgram DSPINFO. This program works differently to the RPG version. I coded it to return only one field or constant at a time. So to see all the fields in a DSPF it needs to loop.

DISPINFOC is coded quite inefficiently but it still works quite fast. It retreives the API data for every time it is called then iterates though all the fields. I coded it this way so as to hide the API retreival within DISPINFOC.

I did not include any of the logic to retreive FILE, RECORD, or FIELD attributes. Also there is no logic for any other caterories (eg Date/Time) other than Cat 23 (Conatants)


DISPINFOC



 /* Function: This program uses the QDFRTVFD API to return the */
 /* structure of a display file.  */


 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "QSYSINC/H/QUSEC"
 #include "QSYSINC/H/QDFRTVFD"

 #define EQ      ==

 #define fail() do { printf("\nLine %d FAILED in file %s", \
 __LINE__,__FILE__); \
 } while(0)

/* Pointers to structures required to be used by this program. */
 QDFFBASE_t *p_QDFFBASE;
 QDFFINFO_t *p_QDFFINFO;
 QDFARFTE_t *p_QDFARFTE;
 QDFFRINF_t *p_QDFFRINF;
 QDFFDPDD_t *p_QDFFDPDD;
 QDFFRDPD_t *p_QDFFRDPD;
 QDFWFLEI_t *p_QDFWFLEI;
 QDFFNTBL_t *p_QDFFNTBL;
 QDFWRCDI_t *p_QDFWRCDI;
 QDFWFLDI_t *p_QDFWFLDI;
 QDFFSFCR_t *p_QDFFSFCR;
 QDFFSFHR_t *p_QDFFSFHR;
 QDFFSCRA_t *p_QDFFSCRA;
 QDFFFITB_t *p_QDFFFITB;
 QDFFFINF_t *p_QDFFFINF;
 QDFFFCON_t *p_QDFFFCON;
 QDFFFDPD_t *p_QDFFFDPD;
 QDFFFNAM_t *p_QDFFFNAM;
 QDFFFDIC_t *p_QDFFFDIC;
 QDFFXFDP_t *p_QDFFXFDP;
 QDFFRCTB_t *p_QDFFRCTB;
 QDFFRCTE_t *p_QDFFRCTE;
 QDFFNTB_t  *p_QDFFNTB;
 QDFFCOSA_t *p_QDFFCOSA;
 QDFFCCOA_t *p_QDFFCCOA;
 QDFKMFDK_t *p_QDFKMFDK;
 QDFKDFT_t  *p_QDFKDFT;
 QDFKEDTR_t *p_QDFKEDTR;
 QDFKDFPM_t *p_QDFKDFPM;


    /* Global variables */
    char *p_iLib;
    char *p_iFile;
    char *p_iRecord;
    char *p_iField;
    char *p_iRow;
    char *p_iCol;
    char *p_iFunc;

 /* returned data   */
typedef struct FieldData {
    char RecordName[10];
    char ROW[1];
    char COL[1];
    char FldIO[1];
    char FldAtr[1];
    char FldNam[10];
    char FldCom[3000];
    int  FldPlen;
    int  FldDec;
    int  EndDta;
  } FieldData_t;

 FieldData_t *p_FieldData;
 FieldData_t *Odata;

    typedef struct inputArguments
    {
        char *pgmname;
        char *iLib;
        char *iFile;
        char *iRecord;
        char *iField;
        char *iRow;
        char *iCol;
        char *iFunc;
        FieldData_t *iOdata;
    } main_args_t;


    int ProcessRec (void);
    int ProcessField (int *);
    int ProcessCons(void);
    int ProcessCat22(void);
    int ProcessCat23(void);
    int ProcessCat24(void);

    int RecIndex;

   /* Area into which the QDFRTVFD returns  the requested data.*/
    char *ReturnVar;


    char FileName[20] = "                    ";
    char Fldblank[3000] = { " " };
    char Format[8];
    int  EndFlds = 0;

    /* 4 bytes WDFFRETN Length of the returned data. */
    /* 4 bytes WDFFSIZE Size of the display file description */
    typedef struct RtvSizeInfo
    {
        int ReturnLen;
        int ReturnSiz;
    } RtvSizeInfo_t;



   /* ########################################################  */
 int main(int argc, main_args_t *main_args)
 {

    RtvSizeInfo_t *RtvSize;
    Qus_EC_t Error_Code = {0};



    int  API_Len;

    p_iFile   =  main_args->iFile;
    p_iLib    =  main_args->iLib;
    p_iRecord =  main_args->iRecord;
    p_iField  =  main_args->iField;
    p_iRow    =  main_args->iRow;
    p_iCol    =  main_args->iCol;
    p_iFunc   =  main_args->iFunc;
    Odata     =  main_args->iOdata;

/* Define the API format requested and the display file to access */
    memcpy(Format,"DSPF0100",8);

/* Point to your DSPF */
    memmove(FileName,p_iFile, strlen(p_iFile));
    memmove(FileName + 10 ,p_iLib, strlen(p_iLib ));


 /* Invoke the API. */
    RtvSize =  malloc(8);
    QDFRTVFD (RtvSize,
                8,
                Format,
                FileName,
                &Error_Code);
    if ( Error_Code.Bytes_Available != 0 ) {
            fail();
            exit (1);
    }
    API_Len  =  RtvSize->ReturnSiz;
    free(RtvSize);

    ReturnVar =  malloc(API_Len);
    QDFRTVFD (ReturnVar,
                API_Len,
                Format,
                FileName,
                &Error_Code);
    if ( Error_Code.Bytes_Available != 0 ) {
            fail();
            printf( "\nExcId: %s" , Error_Code.Exception_Id );
            exit (1);
    }


    ProcessRec();


   free(ReturnVar);
 }
  /* ######################################### */
int ProcessRec() {

    int  NumRecs;
    int i;
    int GotIt = 0;
    /* Access returned structures. The base structure starts at */
    /* the begining of the returned space. */
     p_QDFFBASE = (QDFFBASE_t *)ReturnVar;
     p_QDFFINFO = (QDFFINFO_t *)((char *) p_QDFFBASE + p_QDFFBASE->WDFFINOF);
     p_QDFARFTE = (QDFARFTE_t *)((char *) p_QDFFINFO + p_QDFFINFO->WDFFDFLO);
     p_QDFWFLEI = (QDFWFLEI_t *)((char *) p_QDFFINFO + p_QDFFINFO->WDFFWUOF);
     p_QDFFDPDD = (QDFFDPDD_t *)((char *) p_QDFFINFO + p_QDFFINFO->WDFFXDOF);
     p_QDFWRCDI = (QDFWRCDI_t *)((char *) p_QDFWFLEI + p_QDFWFLEI->WDFWXLEN);
     p_QDFFNTBL = (QDFFNTBL_t *)((char *) p_QDFWFLEI + p_QDFWFLEI->WDFWNTBO);

    /*  here is the place to retreive File Keywords */

     NumRecs = p_QDFFBASE->WDFFRCS;

     for (i=0; i< NumRecs ; ++i) {

         /* Bump ptr to next record structure */
      if  (i  != 0)
     {p_QDFWRCDI = (QDFWRCDI_t *)((char *) p_QDFWRCDI + p_QDFWRCDI->WDFWNXTR);
      p_QDFARFTE = (QDFARFTE_t *)((char *) p_QDFARFTE + sizeof(QDFARFTE_t));   }

     memcpy(Odata->RecordName,
            p_QDFARFTE->WDFARFNM,sizeof(p_QDFARFTE->WDFARFNM));

    if  (i EQ NumRecs - 1) {
      EndFlds = 1;
      }

     ProcessField(&GotIt);



    }

 }

  /* ######################################### */

int ProcessField(int *GotIt) {

      int SflCtl;
      int SizeIdx;
      int FldIdx;
      int NumFlds;
      char ScrnSize[1];
      char Attrib[1];
      char X01     =  0x01 ;
      char Functn[10] = "          ";

      /*  record header   */
       p_QDFFRINF = (QDFFRINF_t *)((char *) p_QDFFINFO + p_QDFARFTE->WDFARFOF);
      /*  record dev dept  */
       p_QDFFRDPD = (QDFFRDPD_t *)((char *) p_QDFFRINF + p_QDFFRINF->WDFFRAOF);
      /*  SFLCTL                                                              */
      /* 12  C       BIN(31) WDFFRFLG    Miscellaneous record contents.       */
      /* 12  C   0   BIT(1)  WDFFUDDS    If on, USRDFN keyword is specified.  */
      /* 12  C   1   BIT(1)  WDFFSFL If on, SFL keyword is specified (next rec*/
      /* 12  C   2   BIT(1)  WDFFSFLC    If on, SFLCTL keyword is specified (p*/
       SflCtl = 0;
       if (p_QDFFRINF->WDFFRFLG.WDFFSFLC)
        {  SflCtl = 1;
     p_QDFFSFCR  = (QDFFSFCR_t *)((char *) p_QDFFRINF + p_QDFFRINF->WDFFRAOF);
     p_QDFFSFHR  = (QDFFSFHR_t *)((char *) p_QDFFSFCR + sizeof(QDFFSFCR_t));
         }

     for (SizeIdx=0; SizeIdx<p_QDFFBASE->WDFFSCR ; ++SizeIdx) {
     p_QDFFSCRA  = (QDFFSCRA_t *)((char *) p_QDFFBASE + sizeof(QDFFBASE_t)
                          + sizeof(QDFFSCRA_t) * SizeIdx    ) ;
    *ScrnSize =  p_QDFFSCRA->WDFFSCIA ;
     }
    /* Find RowColumn table. Note: this is the first row/col table */
    /* so this code only works for the PRIMARY DISPLAY SIZE. */
    /* See QDFFRDPD.WDFFDRCO field description for finding the */
    /* correct QDFFRCTB structure if more than one screen size is */
    /* used. */
      p_QDFFRCTB = (QDFFRCTB_t *)((char *) p_QDFFRINF + p_QDFFRDPD->WDFFDRCO);

    /********  HERE include code for Record Keywords ********/

    /*  PROCESS THE RECORDS FIELDS    */
        /* Find where used section */

      p_QDFWFLDI = (QDFWFLDI_t *)((char *) p_QDFWRCDI + p_QDFWRCDI->WDFWRLEN);
      p_QDFFFITB = (QDFFFITB_t *)((char *) p_QDFFRINF + p_QDFFRINF->WDFFOFIT
                   +  ( p_QDFWFLDI->WDFWRRDX -1) * sizeof(QDFFFITB_t));


    for (FldIdx=0; FldIdx < p_QDFFRINF->WDFFFLD; ++FldIdx) {

       /* Field Header  */
     p_QDFFFINF = (QDFFFINF_t *)((char *) p_QDFFRINF + p_QDFFFITB->WDFFFOFS);

    if (p_QDFFFINF->WDFFFIOA EQ 0x01)  {
      /* constant  */
     p_QDFFFCON = (QDFFFCON_t *)((char *) p_QDFFFINF + sizeof(QDFFFINF_t));
     p_QDFFFDPD = (QDFFFDPD_t *)((char *) p_QDFFFINF + p_QDFFFCON->WDFFFAOC);
    }
    else {
      /*  variable */
     p_QDFFFNAM = (QDFFFNAM_t *)((char *) p_QDFFFINF + sizeof(QDFFFINF_t));
     p_QDFFFDPD = (QDFFFDPD_t *)((char *) p_QDFFFINF + p_QDFFFNAM->WDFFFAOF);
     p_QDFFFDIC = (QDFFFDIC_t *)((char *) p_QDFFFDPD + sizeof(QDFFFDPD_t));
    }
      /* Field Extension  */
     p_QDFFXFDP = (QDFFXFDP_t *)((char *) p_QDFFFINF + p_QDFFFDPD->WDFFXFDO);

      /* Row Column  */
     p_QDFFRCTB = (QDFFRCTB_t *)((char *) p_QDFFRINF + p_QDFFRDPD->WDFFDRCO
                     + (p_QDFWFLDI->WDFWRRDX - 1) *2);
     p_QDFFRCTE = (QDFFRCTE_t *)((char *) p_QDFFRCTB + sizeof(QDFFRCTB_t));

       *Odata->ROW  =  p_QDFFRCTE->WDFFSROW;
       *Odata->COL  =  p_QDFFRCTE->WDFFSCOL;

      /*   here can extract data time flags */

      /* CONSTANTS  */
    if (p_QDFFFINF->WDFFFIOA EQ 0x01)  {
      /* constant  */
      ProcessCons();

    }
    else {
        /*   Field Name   */

       p_QDFFNTB  = (QDFFNTB_t *)((char *) p_QDFFNTBL + sizeof(QDFFNTBL_t)
                          +  10 * (p_QDFWFLDI->WDFWNMEI -1) );


      /*Field attribute.  */
      /*X'01' indicates Constant (see structure QDFFFCON, Constant Field  */
      /*X'02' indicates Output (O), */
      /*X'03' indicates Message (M), h (B), */
      /*X'04' indicates Input (I),  (P)  */
      /*X'05' indicates Both (B), */
      /*X'06' indicates Hidden (H), and */
      /*X'07' indicates Program to System (P) */
       *Odata->FldIO     = p_QDFFFINF->WDFFFIOA;

      /* Keyboard shift and data type.  */
      /* X'00' indicates Alpha shift/character (A), */


        *Odata->FldAtr   = p_QDFFFNAM->WDFFKBDT;
        memcpy(Odata->FldNam,
               p_QDFFNTB->WDFFNAM,sizeof(p_QDFFNTB->WDFFNAM));
        memcpy(Odata->FldCom,Fldblank,3000);
        Odata->FldPlen  = p_QDFFFNAM->WDFFPLEN;
        Odata->FldDec   = p_QDFFFNAM->WDFFDEC;
    }

   /***********  HERE include code for Field KEYWORDS **********/
      if (FldIdx < p_QDFFRINF->WDFFFLD -1) {
       p_QDFWFLDI = (QDFWFLDI_t *)((char *) p_QDFWFLDI + p_QDFWFLDI->WDFWFLDL);
       p_QDFFFITB = (QDFFFITB_t *)((char *) p_QDFFRINF + p_QDFFRINF->WDFFOFIT
                   +  ( p_QDFWFLDI->WDFWRRDX -1) * sizeof(QDFFFITB_t));
       }

      NumFlds += 1;

       Odata->EndDta   = 0;

   /* End ofthe Fields  */
      if ((EndFlds EQ 1) && (FldIdx EQ p_QDFFRINF->WDFFFLD -1) ) {
        Odata->EndDta   = 1;
         *GotIt = 1;
       };

       /* Return the requested Field  */
       memmove(Functn,p_iFunc, strlen(p_iFunc));

        if (!memcmp(Functn , "#FIRST", 6)) {
            *GotIt = 1;
          };

        if (*GotIt)  {
            *GotIt  = 0;
            free(ReturnVar);
            exit(0);
          };

    /* We know we are about to get the NEXT record when we have */
    /* found the record just before                             */
        if (!memcmp(Functn , "#NEXT"  , 5)) {
          if (!memcmp(p_iRecord, Odata->RecordName, sizeof(*p_iRecord))) {
            if(!memcmp(p_iField, Odata->FldNam,sizeof(*p_iField) ))      {
              if(!memcmp(p_iRow, Odata->ROW, sizeof(*p_iRow) ))          {
                if(!memcmp(p_iCol,Odata->COL, sizeof(*p_iCol)))          {
           *GotIt = 1;
                };
              };
            };
          };
        };



    }

 }

  /* ######################################### */

int ProcessCons() {
      /*------------------------------------------------*/
      /* This loops through all keyword categories      */
      /*  for a constant field (text on the screen.)    */
      /*------------------------------------------------*/

   int cc;

     if   (p_QDFFFDPD->WDFFFDOC > 0) {

      p_QDFFCOSA = (QDFFCOSA_t *) ((char *) p_QDFFFINF +
                                              p_QDFFFDPD->WDFFFDOC);
       cc = 0;
       for (cc=0; cc<=p_QDFFCOSA->WDFFCCT -1 ; ++cc) {

          p_QDFFCCOA  = (QDFFCCOA_t *)((char *) p_QDFFCOSA +
                             sizeof(QDFFCOSA_t) + sizeof(QDFFCCOA_t) * cc);


           if (p_QDFFCCOA->WDFFCAID EQ 0x22) {
              p_QDFKMFDK = (QDFKMFDK_t *)((char *) p_QDFFFINF  +
                                                p_QDFFCCOA->WDFFCAOF);
              ProcessCat22();
            }


           if (p_QDFFCCOA->WDFFCAID EQ 0x23) {
              p_QDFKDFT  = (QDFKDFT_t *)((char *) p_QDFFFINF  +
                                                p_QDFFCCOA->WDFFCAOF);
              ProcessCat23();
            }


           if (p_QDFFCCOA->WDFFCAID EQ 0x24) {
              p_QDFKEDTR = (QDFKEDTR_t *)((char *) p_QDFFFINF  +
                                                p_QDFFCCOA->WDFFCAOF);
              ProcessCat24();
            }

       }

     }


 }

  /* ######################################### */

int ProcessCat22() {
      /*-----------------------------------------------*/
      /* This loops through all keywords that fall into*/
      /*  category 22                                  */
      /*-----------------------------------------------*/
}

  /* ######################################### */

int ProcessCat23() {
      /*------------------------------------------------*/
      /* This loops through all keywords that fall into */
      /*  category 23 (DFT, MSGCON, DFTVAL, HTML)       */
      /*------------------------------------------------*/
 typedef _Packed struct  KwdData {
    char Temp[3000];
} KwdData_t;

   KwdData_t  *p_KwdData;
   int        ck;

  for (ck=1; ck <= p_QDFKDFT->WDFKDFS ; ++ck) {

    if   (ck EQ 1 )  {
     p_QDFKDFPM = (QDFKDFPM_t *)((char *) p_QDFKDFT + sizeof(QDFKDFT_t));  }
    else
    {p_QDFKDFPM = (QDFKDFPM_t *)((char *) p_QDFKDFPM  + sizeof(QDFKDFPM_t)); }

        if (p_QDFKDFPM->WDFKDFID EQ 0x01)  {

        memcpy(Odata->FldNam,"          ",10);

        Odata->FldPlen  = p_QDFKDFPM->WDFKDFLN;
        *Odata->FldIO   = p_QDFFFINF->WDFFFIOA;
  p_KwdData =  (KwdData_t *) ((char *) p_QDFKDFPM + sizeof(QDFKDFPM_t) );
        memcpy(Odata->FldCom,
                p_KwdData->Temp, p_QDFKDFPM->WDFKDFLN);

        }

    }


}

  /* ######################################### */

int ProcessCat24() {
      /*-----------------------------------------------*/
      /* This loops through all keywords that fall into*/
      /*  category 24  (Date, Time)                    */
      /*-----------------------------------------------*/
}


RTVFLD (RPG code DISPINFOC driver)

RPG Driver program for DISPINFOC This program is coded to loop to invoke DISPINFOC for one field at a time.

It needs to pass a parameter (#FIRST | #NEXT) to tell DISPINFOC what to do.



     h Option(*NODEBUGIO)  DFTACTGRP(*NO)

     D RTVFLD          PR
     D                               10A
     D                               10A

     D RTVFLD          PI
     D iLib                          10A
     D iFile                         10A

     D DISPINFOC       PR                  ExtPgm('DISPINFOC')
     D Lib                           10A   const
     D File                          10A   const
     D oRecord                       10A   const
     D oField                        10A   const
     D oRow                           1A   const
     D oCol                           1A   const
     D Func                          10A   const
     D Fdata                               like(RTVDATA)
           // returned data
     D RTVDATA         DS
     D RecordName                    10A
     D ROW                            1A
     D COL                            1A
     D FldIO                          1A
     D FldAtr                         1A
     D FldNam                        10A
     D FldCom                      3000A
     D FLdPlen                       10I 0
     D FldDec                        10I 0
     D EndDta                        10I 0

     D oRecordName                   10A
     D oFldNam                       10A
     D oRow                           1A
     D oCol                           1A

      /free

          *INLR = *ON;

          DISPINFOC( iLib  : iFile    : '  ': '  ' : '  ': '  ':
                    '#FIRST' : RTVDATA   );

        DOW (EndDta = 0);

                    oRecordName  =    RecordName ;
                    oFldNam      =    FldNam     ;
                    oROW         =    ROW        ;
                    oCOL         =    COL        ;

       // To get the next record the previous fields info is passed
          DISPINFOC(iLib   :  iFile    :
                    oRecordName  :
                    oFldNam      :
                    oROW         :
                    oCOL         :
                    '#NEXT ' : RTVDATA   );

        ENDDO;

      /end-free