FFStr.cc

 
// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of ff_handler a FreeForm API handler for the OPeNDAP
// DAP2 data server.
 
// Copyright (c) 2005 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This is free software; you can redistribute it and/or modify it under the
// terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 2.1 of the License, or (at your
// option) any later version.
//
// This software is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
// License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
// (c) COPYRIGHT URI/MIT 1997-99
// Please read the full copyright statement in the file COPYRIGHT.
//
// Authors: reza (Reza Nekovei)
 
// FreeFrom sub-class implementation for FFByte,...FFGrid.
// The files are patterned after the subcalssing examples
// Test<type>.c,h files.
//
// ReZa 6/18/97
 
#include "config_ff.h"
 
#ifndef WIN32
#include <strings.h>
#endif
 
#include <ctype.h>
#include <string>
#include <cstring>
 
#include "FFStr.h"
#include <libdap/util.h>
 
extern long BufPtr;   // set by read functions
extern char * BufVal; // set by first call to sequence
 
FFStr::FFStr(const string &n, const string &d) : Str(n, d), d_length(0)
{
}
 
BaseType *
FFStr::ptr_duplicate()
{
    return new FFStr(*this);
}
 
bool
FFStr::read()
{
    if (read_p())           // nothing to do
        return true;
 
    if (BufVal) { // Data in cache
        char *ptr = BufVal + BufPtr;
        vector<char> TmpBuf(size() + 1);
 
        // This code prunes both trailing and leading spaces from strings.
        // Spaces are often added to URLs in file server data sets since the
        // URL length can vary but in FF a field is a fixed size. However, if
        // you want the FF handler to return _exactly_ the string data, this
        // should be turned off. Once the subject of much debate... jhrg
 
        int i, j, sLength;
 
        //remove trailing white space
        for (i = size() - 1; i >= 0; i--)
            if (!isspace(*(ptr + i))) break;
 
        //remove leading white space
        for (j = 0; j < i; j++)
            if (!isspace(*(ptr + j))) break;
 
        sLength = i - j + 1;
        strncpy(TmpBuf.data(), ptr + j, sLength /*i - j + 1 jhrg 4/7/22*/);
        TmpBuf[sLength /*i - j + 1 jhrg 4/7/22*/] = '\0';
 
        // Use set_value() jhrg 8/19/14
        set_value(TmpBuf.data());
        set_read_p(true);
 
        BufPtr += size();
        return true;
    }
 
    return false;
}