DBFReadAttribute()

static void* DBFReadAttribute ( DBFHandle  psDBF, int  hEntity, int  iField, char  chReqType  )

static

Definition at line 934 of file dbfopen.c.

{
        unsigned char *pabyRec;
        void *pReturnField = NULL;
 
        /* -------------------------------------------------------------------- */
        /*      Verify selection.                                               */
        /* -------------------------------------------------------------------- */
        if (hEntity < 0 || hEntity >= psDBF->nRecords)
                return (NULL);
 
        if (iField < 0 || iField >= psDBF->nFields)
                return (NULL);
 
        /* -------------------------------------------------------------------- */
        /*      Have we read the record?                                        */
        /* -------------------------------------------------------------------- */
        if (!DBFLoadRecord(psDBF, hEntity))
                return NULL;
 
        pabyRec = (unsigned char *)psDBF->pszCurrentRecord;
 
        /* -------------------------------------------------------------------- */
        /*      Ensure we have room to extract the target field.                */
        /* -------------------------------------------------------------------- */
        if (psDBF->panFieldSize[iField] >= psDBF->nWorkFieldLength)
        {
                psDBF->nWorkFieldLength = psDBF->panFieldSize[iField] + 100;
                if (psDBF->pszWorkField == NULL)
                        psDBF->pszWorkField = (char *)malloc(psDBF->nWorkFieldLength);
                else
                        psDBF->pszWorkField = (char *)realloc(psDBF->pszWorkField, psDBF->nWorkFieldLength);
        }
 
        /* -------------------------------------------------------------------- */
        /*      Extract the requested field.                                    */
        /* -------------------------------------------------------------------- */
        strncpy(
            psDBF->pszWorkField, ((const char *)pabyRec) + psDBF->panFieldOffset[iField], psDBF->panFieldSize[iField]);
        psDBF->pszWorkField[psDBF->panFieldSize[iField]] = '\0';
 
        pReturnField = psDBF->pszWorkField;
 
        /* -------------------------------------------------------------------- */
        /*      Decode the field.                                               */
        /* -------------------------------------------------------------------- */
        if (chReqType == 'N')
        {
                psDBF->dfDoubleField = psDBF->sHooks.Atof(psDBF->pszWorkField);
 
                pReturnField = &(psDBF->dfDoubleField);
        }
 
/* -------------------------------------------------------------------- */
/*      Should we trim white space off the string attribute value?      */
/* -------------------------------------------------------------------- */
#ifdef TRIM_DBF_WHITESPACE
        else
        {
                char *pchSrc, *pchDst;
 
                pchDst = pchSrc = psDBF->pszWorkField;
                while (*pchSrc == ' ')
                        pchSrc++;
 
                while (*pchSrc != '\0')
                        *(pchDst++) = *(pchSrc++);
                *pchDst = '\0';
 
                while (pchDst != psDBF->pszWorkField && *(--pchDst) == ' ')
                        *pchDst = '\0';
        }
#endif
 
        return (pReturnField);
}

References DBFLoadRecord(), if(), and malloc().

Referenced by DBFReadDoubleAttribute(), DBFReadIntegerAttribute(), DBFReadLogicalAttribute(), and DBFReadStringAttribute().

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