C++ PCOLDEF::IsSpecial方法代码示例

bool CSVDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff)
  {
  char   buf[8];

  // Double check correctness of offset values
  if (Catfunc == FNC_NO)
    for (PCOLDEF cdp = To_Cols; cdp; cdp = cdp->GetNext())
      if (cdp->GetOffset() < 1 && !cdp->IsSpecial()) {
        strcpy(g->Message, MSG(BAD_OFFSET_VAL));
        return true;
        } // endif Offset

  // Call DOSDEF DefineAM with am=CSV so FMT is not confused with FIX
  if (DOSDEF::DefineAM(g, "CSV", poff))
    return true;

  GetCharCatInfo("Separator", ",", buf, sizeof(buf));
  Sep = (strlen(buf) == 2 && buf[0] == '\\' && buf[1] == 't') ? '\t' : *buf;
  Quoted = GetIntCatInfo("Quoted", -1);
  GetCharCatInfo("Qchar", "", buf, sizeof(buf));
  Qot = *buf;

  if (Qot && Quoted < 0)
    Quoted = 0;
  else if (!Qot && Quoted >= 0)
    Qot = '"';

  Fmtd = (!Sep || (am && (*am == 'F' || *am == 'f')));
  Header = (GetIntCatInfo("Header", 0) != 0);
  Maxerr = GetIntCatInfo("Maxerr", 0);
  Accept = (GetIntCatInfo("Accept", 0) != 0);
  return false;
  } // end of DefineAM

int TDBCSV::EstimatedLength(PGLOBAL g)
  {
  int     n = 0;
  PCOLDEF cdp;

  if (trace)
    htrc("EstimatedLength: Fields=%d Columns=%p\n", Fields, Columns);

  for (cdp = To_Def->GetCols(); cdp; cdp = cdp->GetNext())
    if (!cdp->IsSpecial() && !cdp->IsVirtual())  // A true column
      n++;

  return --n;   // Number of separators if all fields are null
  } // end of Estimated Length

bool TDBCSV::OpenDB(PGLOBAL g)
  {
  bool    rc = false;
  PCOLDEF cdp;
  PDOSDEF tdp = (PDOSDEF)To_Def;

  if (Use != USE_OPEN && (Columns || Mode == MODE_UPDATE)) {
    // Allocate the storage used to read (or write) records
    int     i, len;
    PCSVCOL colp;

    if (!Fields)              // May have been set in TABFMT::OpenDB
      if (Mode != MODE_UPDATE && Mode != MODE_INSERT) {
        for (colp = (PCSVCOL)Columns; colp; colp = (PCSVCOL)colp->Next)
          if (!colp->IsSpecial() && !colp->IsVirtual())
            Fields = MY_MAX(Fields, (int)colp->Fldnum);

        if (Columns)
          Fields++;           // Fldnum was 0 based

      } else
        for (cdp = tdp->GetCols(); cdp; cdp = cdp->GetNext())
          if (!cdp->IsSpecial() && !cdp->IsVirtual())
            Fields++;

    Offset = (int*)PlugSubAlloc(g, NULL, sizeof(int) * Fields);
    Fldlen = (int*)PlugSubAlloc(g, NULL, sizeof(int) * Fields);

    if (Mode == MODE_INSERT || Mode == MODE_UPDATE) {
      Field = (PSZ*)PlugSubAlloc(g, NULL, sizeof(PSZ) * Fields);
      Fldtyp = (bool*)PlugSubAlloc(g, NULL, sizeof(bool) * Fields);
      } // endif Mode

    for (i = 0; i < Fields; i++) {
      Offset[i] = 0;
      Fldlen[i] = 0;

      if (Field) {
        Field[i] = NULL;
        Fldtyp[i] = false;
        } // endif Field

      } // endfor i

    if (Field)
      // Prepare writing fields
      if (Mode != MODE_UPDATE) {
        for (colp = (PCSVCOL)Columns; colp; colp = (PCSVCOL)colp->Next)
          if (!colp->IsSpecial() && !colp->IsVirtual()) {
            i = colp->Fldnum;
            len = colp->GetLength();
            Field[i] = (PSZ)PlugSubAlloc(g, NULL, len + 1);
            Field[i][len] = '\0';
            Fldlen[i] = len;
            Fldtyp[i] = IsTypeNum(colp->GetResultType());
            } // endif colp

      } else     // MODE_UPDATE
        for (cdp = tdp->GetCols(); cdp; cdp = cdp->GetNext())
          if (!cdp->IsSpecial() && !cdp->IsVirtual()) {
            i = cdp->GetOffset() - 1;
            len = cdp->GetLength();
            Field[i] = (PSZ)PlugSubAlloc(g, NULL, len + 1);
            Field[i][len] = '\0';
            Fldlen[i] = len;
            Fldtyp[i] = IsTypeNum(cdp->GetType());
            } // endif cdp

    } // endif Use

  if (Header) {
    // Check that the Lrecl is at least equal to the header line length
    int     headlen = 0;
    PCOLDEF cdp;
    PDOSDEF tdp = (PDOSDEF)To_Def;

    for (cdp = tdp->GetCols(); cdp; cdp = cdp->GetNext())
      headlen += strlen(cdp->GetName()) + 3;  // 3 if names are quoted

    if (headlen > Lrecl) {
      Lrecl = headlen;
      Txfp->Lrecl = headlen;
      } // endif headlen

    } // endif Header

  Nerr = 0;
  rc = TDBDOS::OpenDB(g);

  if (!rc && Mode == MODE_UPDATE && To_Kindex)
    // Because KINDEX::Init is executed in mode READ, we must restore
    // the Fldlen array that was modified when reading the table file.
    for (cdp = tdp->GetCols(); cdp; cdp = cdp->GetNext())
      Fldlen[cdp->GetOffset() - 1] = cdp->GetLength();

  return rc;
  } // end of OpenDB