// Geometric Tools, Inc.
// http://www.geometrictools.com
// Copyright (c) 1998-2005.  All Rights Reserved
//
// The Wild Magic Library (WM3) source code is supplied under the terms of
// the license agreement
//     http://www.geometrictools.com/License/WildMagic3License.pdf
// and may not be copied or disclosed except in accordance with the terms
// of that agreement.

#include "CommandLine.h"
using namespace Wm3;

char CommandLine::ms_acOptionNotFound[] = "option not found";
char CommandLine::ms_acArgumentRequired[] = "option requires an argument";
char CommandLine::ms_acArgumentOutOfRange[] = "argument out of range";
char CommandLine::ms_acFilenameNotFound[] = "filename not found";

//----------------------------------------------------------------------------
CommandLine::CommandLine (int iQuantity, char** apcArgument)
{
    m_iQuantity = iQuantity;
    m_acCmdline = 0;
    m_abUsed = 0;

    if ( m_iQuantity > 0 )
    {
        m_apcArgument = new char*[m_iQuantity];
        for (int i = 0; i < m_iQuantity; i++)
            m_apcArgument[i] = apcArgument[i];

    }
    else
    {
        m_apcArgument = 0;
    }

    Initialize();
}
//----------------------------------------------------------------------------
CommandLine::CommandLine (char* acCmdline)
{
    class Argument
    {
    public:
        char* m_pcItem;
        Argument* m_pkNext;
    };

    m_iQuantity = 0;
    m_apcArgument = 0;
    m_acCmdline = 0;
    m_abUsed = 0;

    if ( acCmdline == 0 || strlen(acCmdline) == 0 )
        return;

    m_acCmdline = new char[strlen(acCmdline)+1];
    strcpy(m_acCmdline,acCmdline);

    char* pcToken = strtok(m_acCmdline," \t");
    Argument* pkList = 0;

    while ( pcToken )
    {
        m_iQuantity++;

        Argument* pkCurrent = new Argument;
        pkCurrent->m_pcItem = pcToken;
        pkCurrent->m_pkNext = pkList;
        pkList = pkCurrent;

        pcToken = strtok(0," \t");
    }

    m_iQuantity++;
    m_apcArgument = new char*[m_iQuantity];
    m_apcArgument[0] = m_acCmdline;
    int i = m_iQuantity-1;
    while ( pkList )
    {
        m_apcArgument[i--] = pkList->m_pcItem;
        
        Argument* pkSave = pkList->m_pkNext;
        delete pkList;
        pkList = pkSave;
    }

    Initialize();
}
//----------------------------------------------------------------------------
CommandLine::~CommandLine ()
{
    delete[] m_abUsed;
    delete[] m_apcArgument;
    delete[] m_acCmdline;
}
//----------------------------------------------------------------------------
void CommandLine::Initialize ()
{
    m_abUsed = new bool[m_iQuantity];
    memset(m_abUsed,false,m_iQuantity*sizeof(bool));

    m_dSmall = 0.0;
    m_dLarge = 0.0;
    m_bMinSet = false;
    m_bMaxSet = false;
    m_bInfSet = false;
    m_bSupSet = false;

    m_acLastError = 0;
}
//----------------------------------------------------------------------------
int CommandLine::ExcessArguments ()
{
    // checks to see if any command line arguments were not processed
    for (int i = 1; i < m_iQuantity; i++)
    {
        if ( !m_abUsed[i] )
            return i;
    }

    return 0;
}
//----------------------------------------------------------------------------
CommandLine& CommandLine::Min (double dValue)
{
    m_dSmall = dValue;
    m_bMinSet = true;
    return *this;
}
//----------------------------------------------------------------------------
CommandLine& CommandLine::Max (double dValue)
{
    m_dLarge = dValue;
    m_bMaxSet = true;
    return *this;
}
//----------------------------------------------------------------------------
CommandLine& CommandLine::Inf (double dValue)
{
    m_dSmall = dValue;
    m_bInfSet = true;
    return *this;
}
//----------------------------------------------------------------------------
CommandLine& CommandLine::Sup (double dValue)
{
    m_dLarge = dValue;
    m_bSupSet = true;
    return *this;
}
//----------------------------------------------------------------------------
int CommandLine::Boolean (char* acName)
{
    bool bValue = false;
    return Boolean(acName,bValue);
}
//----------------------------------------------------------------------------
int CommandLine::Boolean (char* acName, bool& rbValue)
{
    int iMatchFound = 0;
    rbValue = false;
    for (int i = 1; i < m_iQuantity; i++)
    {
        char* pcTmp = m_apcArgument[i];
        if ( !m_abUsed[i] && pcTmp[0] == '-' && strcmp(acName,++pcTmp) == 0 )
        {
            m_abUsed[i] = true;
            iMatchFound = i;
            rbValue = true;
            break;
        }
    }

    if ( iMatchFound == 0 )
        m_acLastError = ms_acOptionNotFound;

    return iMatchFound;
}
//----------------------------------------------------------------------------
int CommandLine::Integer (char* acName, int& riValue)
{
    int iMatchFound = 0;
    for (int i = 1; i < m_iQuantity; i++)
    {
        char* pcTmp = m_apcArgument[i];
        if ( !m_abUsed[i] && pcTmp[0] == '-' && strcmp(acName,++pcTmp) == 0 )
        {
            // get argument
            pcTmp = m_apcArgument[i+1];
            if ( m_abUsed[i+1] || (pcTmp[0] == '-' && !isdigit(pcTmp[1])) )
            {
                m_acLastError = ms_acArgumentRequired;
                return 0;
            }
            sscanf(pcTmp,"%d",&riValue);
            if ( (m_bMinSet && riValue < m_dSmall)
            ||   (m_bMaxSet && riValue > m_dLarge)
            ||   (m_bInfSet && riValue <= m_dSmall)
            ||   (m_bSupSet && riValue >= m_dLarge) )
            {
                m_acLastError = ms_acArgumentOutOfRange;
                return 0;
            }
            m_abUsed[i] = true;
            m_abUsed[i+1] = true;
            iMatchFound = i;
            break;
        }
    }

    m_bMinSet = false;
    m_bMaxSet = false;
    m_bInfSet = false;
    m_bSupSet = false;

    if ( iMatchFound == 0 )
        m_acLastError = ms_acOptionNotFound;

    return iMatchFound;
}
//----------------------------------------------------------------------------
int CommandLine::Float (char* acName, float& rfValue)
{
    int iMatchFound = 0;
    for (int i = 1; i < m_iQuantity; i++)
    {
        char* pcTmp = m_apcArgument[i];
        if ( !m_abUsed[i] && pcTmp[0] == '-' && strcmp(acName,++pcTmp) == 0 )
        {
            // get argument
            pcTmp = m_apcArgument[i+1];
            if ( m_abUsed[i+1] || (pcTmp[0] == '-' && !isdigit(pcTmp[1])) )
            {
                m_acLastError = ms_acArgumentRequired;
                return 0;
            }
            sscanf(pcTmp,"%f",&rfValue);
            if ( (m_bMinSet && rfValue < m_dSmall)
            ||   (m_bMaxSet && rfValue > m_dLarge)
            ||   (m_bInfSet && rfValue <= m_dSmall)
            ||   (m_bSupSet && rfValue >= m_dLarge) )
            {
                m_acLastError = ms_acArgumentOutOfRange;
                return 0;
            }
            m_abUsed[i] = true;
            m_abUsed[i+1] = true;
            iMatchFound = i;
            break;
        }
    }

    m_bMinSet = false;
    m_bMaxSet = false;
    m_bInfSet = false;
    m_bSupSet = false;

    if ( iMatchFound == 0 )
        m_acLastError = ms_acOptionNotFound;

    return iMatchFound;
}
//----------------------------------------------------------------------------
int CommandLine::Double (char* acName, double& rdValue)
{
    int iMatchFound = 0;
    for (int i = 1; i < m_iQuantity; i++)
    {
        char* pcTmp = m_apcArgument[i];
        if ( !m_abUsed[i] && pcTmp[0] == '-' && strcmp(acName,++pcTmp) == 0 )
        {
            // get argument
            pcTmp = m_apcArgument[i+1];
            if ( m_abUsed[i+1] || (pcTmp[0] == '-' && !isdigit(pcTmp[1])) )
            {
                m_acLastError = ms_acArgumentRequired;
                return 0;
            }
            sscanf(pcTmp,"%lf",&rdValue);
            if ( (m_bMinSet && rdValue < m_dSmall)
            ||   (m_bMaxSet && rdValue > m_dLarge)
            ||   (m_bInfSet && rdValue <= m_dSmall)
            ||   (m_bSupSet && rdValue >= m_dLarge) )
            {
                m_acLastError = ms_acArgumentOutOfRange;
                return 0;
            }
            m_abUsed[i] = true;
            m_abUsed[i+1] = true;
            iMatchFound = i;
            break;
        }
    }

    m_bMinSet = false;
    m_bMaxSet = false;
    m_bInfSet = false;
    m_bSupSet = false;

    if ( iMatchFound == 0 )
        m_acLastError = ms_acOptionNotFound;

    return iMatchFound;
}
//----------------------------------------------------------------------------
int CommandLine::String (char* acName, char*& racValue)
{
    int iMatchFound = 0;
    for (int i = 1; i < m_iQuantity; i++)
    {
        char* pcTmp = m_apcArgument[i];
        if ( !m_abUsed[i] && pcTmp[0] == '-' && strcmp(acName,++pcTmp) == 0 )
        {
            // get argument
            pcTmp = m_apcArgument[i+1];
            if ( m_abUsed[i+1] || pcTmp[0] == '-' )
            {
                m_acLastError = ms_acArgumentRequired;
                return 0;
            }

            racValue = new char[strlen(pcTmp)+1];
            strcpy(racValue,pcTmp);
            m_abUsed[i] = true;
            m_abUsed[i+1] = true;
            iMatchFound = i;
            break;
        }
    }

    if ( iMatchFound == 0 )
        m_acLastError = ms_acOptionNotFound;

    return iMatchFound;
}
//----------------------------------------------------------------------------
int CommandLine::Filename (char*& racName)
{
    int iMatchFound = 0;
    for (int i = 1; i < m_iQuantity; i++)
    {
        char* pcTmp = m_apcArgument[i];
        if ( !m_abUsed[i] && pcTmp[0] != '-' )
        {
            racName = new char[strlen(pcTmp)+1];
            strcpy(racName,pcTmp);
            m_abUsed[i] = true;
            iMatchFound = i;
            break;
        }
    }

    if ( iMatchFound == 0 )
        m_acLastError = ms_acFilenameNotFound;

    return iMatchFound;
}
//----------------------------------------------------------------------------
const char* CommandLine::GetLastError ()
{
    return m_acLastError;
}
//----------------------------------------------------------------------------
