File content as of revision 7:8159a2d12e4e:

/*
 * CharValue.cpp
 *
 * Created on: Nov 1, 2013
 * * Authors: Vincent Wochnik <v.wochnik@gmail.com>
 *
 * Copyright (c) 2013 Cumulocity GmbH
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include "CharValue.h"
#include "NullValue.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

CharValue::CharValue(const char *str, bool copy)
{
    if ((str == NULL) || (*str == '\0')) {
        _alloc = false;
        _str = NULL;
    } else {
        _alloc = copy;
        if (copy) {
            _str = (const char*)malloc(strlen(str)*sizeof(char));
            if (_str == NULL)
                return;
            strcpy((char*)_str, str);
            _escape = escapeCheck();
        } else {
            _str = str;
            _escape = escapeCheck();
        }
    }
}

CharValue::~CharValue()
{
    if (_alloc)
        free((void*)_str);
}

uint8_t CharValue::valueType() const
{
    if (_str == NULL)
        return VALUE_NULL;
    return VALUE_CHARACTER;
}

long CharValue::integerValue() const
{
    return 0;
}

double CharValue::floatValue() const
{
    return 0.0;
}

const char * CharValue::characterValue() const
{
    return _str;
}

size_t CharValue::write(AbstractDataSink& sink) const
{
    size_t n;
    const char *ptr; char c;

    if (_str == NULL)
        return 0;

    n = 0;
    if (_escape)
        n += sink.write('"');

    for (ptr = _str; (c = *ptr) != '\0'; ptr++) {
        if ((_escape) && (c == '"'))
            n += sink.write('"');
        n += sink.write(c);
    }

    if (_escape)
        n += sink.write('"');
    return n;
}

size_t CharValue::length() const
{
    size_t n;
    const char *ptr; char c;

    if (_str == NULL)
        return 0;

    n = 0;
    if (_escape)
        n += 2;

    for (ptr = _str; (c = *ptr) != '\0'; ptr++) {
        if ((_escape) && (c == '"'))
            n++;
        n++;
    }

    return n;
}

Value* CharValue::copy() const
{
    if (_str == NULL)
        return new NullValue();
    return new CharValue(_str, true);
}

bool CharValue::escapeCheck()
{
    const char *ptr; char c;

    ptr = _str;
    while (*ptr != '\0') {
        c = *ptr;
        if ((isspace(c)) && ((ptr == _str) || (c != ' ')))
            return true;
        else if ((c == '"') || (c == ','))
            return true;
        ptr++;
    }

    if (isspace(c))
        return true;

    return false;
}