DBFIsValueNULL()

static int DBFIsValueNULL ( char  chType, const char *  pszValue  )

static

Definition at line 1080 of file dbfopen.c.

{
        int i;
 
        if (pszValue == NULL)
                return TRUE;
 
        switch (chType)
        {
        case 'N':
        case 'F':
                /*
                ** We accept all asterisks or all blanks as NULL
                ** though according to the spec I think it should be all
                ** asterisks.
                */
                if (pszValue[0] == '*')
                        return TRUE;
 
                for (i = 0; pszValue[i] != '\0'; i++)
                {
                        if (pszValue[i] != ' ')
                                return FALSE;
                }
                return TRUE;
 
        case 'D':
                /* NULL date fields have value "00000000" or blank or empty */
                if (pszValue[0] == '\0' || /* emtpy string */
                    strncmp(pszValue, "00000000", 8) == 0 || strncmp(pszValue, "        ", 8) == 0)
                {
                        return 1;
                }
                else
                {
                        return 0;
                }
                /* return strncmp(pszValue,"00000000",8) == 0; */
 
        case 'L':
                /* NULL boolean fields have value "?" or empty */
                if (pszValue[0] == '\0' || pszValue[0] == '?')
                {
                        return 1;
                }
                else
                {
                        return 0;
                }
 
        default:
                /* empty string fields are considered NULL */
                return strlen(pszValue) == 0;
        }
}

References FALSE, and TRUE.

Referenced by DBFAlterFieldDefn(), and DBFIsAttributeNULL().

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