tool/NumberListParser.cpp
author Florian Pose <fp@igh-essen.com>
Wed, 19 Sep 2012 19:46:58 +0200
branchstable-1.5
changeset 2425 6a6dec6fc806
parent 2012 ee4782738e30
permissions -rw-r--r--
Avoided use of AM_CFLAGS, which is not used in some situations; fixed warning.
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/*****************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2006-2009  Florian Pose, Ingenieurgemeinschaft IgH
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 *
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 *  This file is part of the IgH EtherCAT Master.
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 *
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 *  The IgH EtherCAT Master is free software; you can redistribute it and/or
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 *  modify it under the terms of the GNU General Public License version 2, as
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 *  published by the Free Software Foundation.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
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 *  Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License along
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 *  with the IgH EtherCAT Master; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 *  ---
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 *
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 *  The license mentioned above concerns the source code only. Using the
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 *  EtherCAT technology and brand is only permitted in compliance with the
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 *  industrial property and similar rights of Beckhoff Automation GmbH.
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 *
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 ****************************************************************************/
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#include <cstring>
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#include <sstream>
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#include <stdexcept>
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using namespace std;
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#include "NumberListParser.h"
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/*****************************************************************************/
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NumberListParser::NumberListParser():
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    max(0U),
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    hasMax(false)
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{
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}
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/*****************************************************************************/
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NumberListParser::~NumberListParser()
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{
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}
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/*****************************************************************************/
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NumberListParser::List NumberListParser::parse(const char *data)
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{
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    List ret;
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    unsigned int i = 0, size = strlen(data), firstNum = 0U, secondNum = 0U;
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    typedef enum {
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        SectionStart,
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        FirstNumber,
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        Range,
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        SecondNumber,
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        Finished
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    } State;
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    State state = SectionStart;
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    while (state != Finished) {
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        switch (state) {
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            case SectionStart:
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                if (i >= size) {
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                    state = Finished;
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                } else if (isNumeric(data[i])) {
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                    firstNum = parseNumber(data, &i, size);
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                    state = FirstNumber;
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                } else if (data[i] == '-') {
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                    firstNum = 0U;
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                    i++;
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                    state = Range;
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                } else if (data[i] == ',') {
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                    i++;
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                } else {
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                    stringstream err;
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                    err << "Invalid character " << data[i]
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                        << " at position " << i << "in state "
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                        << state << "." << endl;
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                    throw runtime_error(err.str());
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                }
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                break;
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            case FirstNumber:
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                if (i >= size) {
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                    ret.push_back(firstNum);
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                    state = Finished;
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                } else if (data[i] == '-') {
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                    i++;
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                    state = Range;
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                } else if (data[i] == ',') {
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                    i++;
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                    ret.push_back(firstNum);
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                    state = SectionStart;
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                } else {
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                    stringstream err;
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                    err << "Invalid character " << data[i]
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                        << " at position " << i << "in state "
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                        << state << "." << endl;
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                    throw runtime_error(err.str());
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                }
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                break;
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            case Range:
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                if (i >= size) {
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                    int max = maximum();
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                    // only increasing ranges if second number omitted
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                    if (max >= 0 && firstNum <= (unsigned int) max) {
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                        List r = range(firstNum, max);
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                        ret.splice(ret.end(), r);
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                    }
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                    state = Finished;
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                } else if (isNumeric(data[i])) {
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                    secondNum = parseNumber(data, &i, size);
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                    state = SecondNumber;
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                } else if (data[i] == ',') {
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                    int max = maximum();
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                    i++;
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                    if (max >= 0) {
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                        List r = range(firstNum, max);
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                        ret.splice(ret.end(), r);
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                    }
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                    state = SectionStart;
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                } else {
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                    stringstream err;
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                    err << "Invalid character " << data[i]
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                        << " at position " << i << "in state "
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                        << state << "." << endl;
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                    throw runtime_error(err.str());
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                }
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                break;
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            case SecondNumber:
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                if (i >= size) {
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                    List r = range(firstNum, secondNum);
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                    ret.splice(ret.end(), r);
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                    state = Finished;
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                } else if (data[i] == ',') {
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                    i++;
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                    List r = range(firstNum, secondNum);
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                    ret.splice(ret.end(), r);
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                    state = SectionStart;
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                } else {
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                    stringstream err;
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                    err << "Invalid character " << data[i]
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                        << " at position " << i << "in state "
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                        << state << "." << endl;
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                    throw runtime_error(err.str());
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                }
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                break;
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            default:
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                {
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                    stringstream err;
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                    err << "Invalid state " << state << ".";
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                    throw runtime_error(err.str());
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                }
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        }
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    }
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    return ret;
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}
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/*****************************************************************************/
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int NumberListParser::maximum()
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{
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    if (!hasMax) {
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        max = getMax();
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    }
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    return max;
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}
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/*****************************************************************************/
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bool NumberListParser::isNumeric(char c)
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{
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    return c >= '0' && c <= '9';
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}
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/*****************************************************************************/
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unsigned int NumberListParser::parseNumber(
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        const char *data,
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        unsigned int *i,
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        unsigned int size
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   193
        )
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{
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    unsigned int numSize = 0U, ret;
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   196
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   197
    while (*i + numSize < size && isNumeric(data[*i + numSize])) {
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   198
        numSize++;
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   199
    }
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   200
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   201
    if (numSize) {
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   202
        stringstream str;
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   203
        str << string(data + *i, numSize);
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   204
        str >> ret;
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diff changeset
   205
    } else {
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   206
        throw runtime_error("EOF");
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diff changeset
   207
    }
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diff changeset
   208
ec6223c3b7ec Multi-master support for command-line tool. The --master option supports
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diff changeset
   209
    *i = *i + numSize;
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diff changeset
   210
    return ret;
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diff changeset
   211
}
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   212
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   213
/****************************************************************************/
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   214
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   215
NumberListParser::List NumberListParser::range(
1826
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diff changeset
   216
        unsigned int i,
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   217
        unsigned int j
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diff changeset
   218
        )
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diff changeset
   219
{
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87de63b19e4c Implemented ranges for slaves, configs and domains.
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   220
    List ret;
1826
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diff changeset
   221
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   222
    if (i <= j) {
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diff changeset
   223
        for (; i <= j; i++) {
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diff changeset
   224
            ret.push_back(i);
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diff changeset
   225
        }
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diff changeset
   226
    } else {
1828
651e9cfb244b Fixed endless loop if negative master index range ends at zero.
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diff changeset
   227
        for (; j <= i; j++) {
651e9cfb244b Fixed endless loop if negative master index range ends at zero.
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diff changeset
   228
            ret.push_front(j);
1826
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diff changeset
   229
        }
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diff changeset
   230
    }
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diff changeset
   231
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   232
    return ret;
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diff changeset
   233
}
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   234
ec6223c3b7ec Multi-master support for command-line tool. The --master option supports
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diff changeset
   235
/****************************************************************************/