/*============================================================================*/
/*
  VFLib: https://github.com/vinniefalco/VFLib

  Copyright (C) 2008 by Vinnie Falco <vinnie.falco@gmail.com>

  This library contains portions of other open source products covered by
  separate licenses. Please see the corresponding source files for specific
  terms.

  VFLib is provided under the terms of The MIT License (MIT):

  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.
*/
/*============================================================================*/

namespace Debug
{

//------------------------------------------------------------------------------

bool isDebuggerAttached ()
{
    return beast_isRunningUnderDebugger ();
}

//------------------------------------------------------------------------------

#if BEAST_DEBUG && defined (beast_breakDebugger)
void breakPoint ()
{
    if (isDebuggerAttached ())
        beast_breakDebugger;
}

#else
void breakPoint ()
{
    bassertfalse
}

#endif

//----------------------------------------------------------------------------

#if BEAST_MSVC && defined (_DEBUG)

void setHeapAlwaysCheck (bool bAlwaysCheck)
{
    int flags = _CrtSetDbgFlag (_CRTDBG_REPORT_FLAG);

    if (bAlwaysCheck) flags |= _CRTDBG_CHECK_ALWAYS_DF; // on
    else flags &= ~_CRTDBG_CHECK_ALWAYS_DF; // off

    _CrtSetDbgFlag (flags);
}

void setHeapDelayedFree (bool bDelayedFree)
{
    int flags = _CrtSetDbgFlag (_CRTDBG_REPORT_FLAG);

    if (bDelayedFree) flags |= _CRTDBG_DELAY_FREE_MEM_DF; // on
    else flags &= ~_CRTDBG_DELAY_FREE_MEM_DF; // off

    _CrtSetDbgFlag (flags);
}

void setHeapReportLeaks (bool bReportLeaks)
{
    int flags = _CrtSetDbgFlag (_CRTDBG_REPORT_FLAG);

    if (bReportLeaks) flags |= _CRTDBG_LEAK_CHECK_DF; // on
    else flags &= ~_CRTDBG_LEAK_CHECK_DF; // off

    _CrtSetDbgFlag (flags);
}

void checkHeap ()
{
    _CrtCheckMemory ();
}

#else

void setHeapAlwaysCheck (bool)
{
}

void setHeapDelayedFree (bool)
{
}

void setHeapReportLeaks (bool)
{
}

void checkHeap ()
{
}

#endif

//------------------------------------------------------------------------------

const String getFileNameFromPath (const char* sourceFileName)
{
    return File::createFileWithoutCheckingPath (sourceFileName).getFileName ();
}

// Returns a String with double quotes escaped
static const String withEscapedQuotes (String const& string)
{
    String escaped;

    int i0 = 0;
    int i;

    do
    {
        i = string.indexOfChar (i0, '"');

        if (i == -1)
        {
            escaped << string.substring (i0, string.length ());
        }
        else
        {
            escaped << string.substring (i0, i) << "\\\"";
            i0 = i + 1;
        }
    }
    while (i != -1);

    return escaped;
}

// Converts escaped quotes back into regular quotes
static const String withUnescapedQuotes (String const& string)
{
    String unescaped;

    int i0 = 0;
    int i;

    do
    {
        i = string.indexOfChar (i0, '\\');

        if (i == -1)
        {
            unescaped << string.substring (i0, string.length ());
        }
        else
        {
            // peek
            if (string.length () > i && string[i + 1] == '\"')
            {
                unescaped << string.substring (i0, i) << '"';
                i0 = i + 2;
            }
            else
            {
                unescaped << string.substring (i0, i + 1);
                i0 = i + 1;
            }
        }
    }
    while (i != -1);

    return unescaped;
}

// Converts a String that may contain newlines, into a
// command line where each line is delimited with quotes.
// Any quotes in the actual string will be escaped via \".
String stringToCommandLine (String const& string)
{
    String commandLine;

    int i0 = 0;
    int i;

    for (i = 0; i < string.length (); i++)
    {
        beast_wchar c = string[i];

        if (c == '\n')
        {
            if (i0 != 0)
                commandLine << ' ';

            commandLine << '"' << withEscapedQuotes (string.substring (i0, i)) << '"';
            i0 = i + 1;
        }
    }

    if (i0 < i)
    {
        if (i0 != 0)
            commandLine << ' ';

        commandLine << '"' << withEscapedQuotes (string.substring (i0, i)) << '"';
    }

    return commandLine;
}

// Converts a command line consisting of multiple quoted strings
// back into a single string with newlines delimiting each quoted
// string. Escaped quotes \" are turned into real quotes.
String commandLineToString (const String& commandLine)
{
    String string;

    bool quoting = false;
    int i0 = 0;
    int i;

    for (i = 0; i < commandLine.length (); i++)
    {
        beast_wchar c = commandLine[i];

        if (c == '\\')
        {
            // peek
            if (commandLine.length () > i && commandLine[i + 1] == '\"')
            {
                i++;
            }
        }
        else if (c == '"')
        {
            if (!quoting)
            {
                i0 = i + 1;
                quoting = true;
            }
            else
            {
                if (!string.isEmpty ())
                    string << '\n';

                string << withUnescapedQuotes (commandLine.substring (i0, i));
                quoting = false;
            }
        }
    }

    return string;
}

}