<commit_before>/*
    FreeRTOS V7.0.1 - Copyright (C) 2011 Real Time Engineers Ltd.
	

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS tutorial books are available in pdf and paperback.        *
     *    Complete, revised, and edited pdf reference manuals are also       *
     *    available.                                                         *
     *                                                                       *
     *    Purchasing FreeRTOS documentation will not only help you, by       *
     *    ensuring you get running as quickly as possible and with an        *
     *    in-depth knowledge of how to use FreeRTOS, it will also help       *
     *    the FreeRTOS project to continue with its mission of providing     *
     *    professional grade, cross platform, de facto standard solutions    *
     *    for microcontrollers - completely free of charge!                  *
     *                                                                       *
     *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
     *                                                                       *
     *    Thank you for using FreeRTOS, and thank you for your support!      *
     *                                                                       *
    ***************************************************************************


    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
    >>>NOTE<<< The modification to the GPL is included to allow you to
    distribute a combined work that includes FreeRTOS without being obliged to
    provide the source code for proprietary components outside of the FreeRTOS
    kernel.  FreeRTOS 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 General Public License for
    more details. You should have received a copy of the GNU General Public
    License and the FreeRTOS license exception along with FreeRTOS; if not it
    can be viewed here: http://www.freertos.org/a00114.html and also obtained
    by writing to <NAME>, contact details for whom are available on the
    FreeRTOS WEB site.

    1 tab == 4 spaces!

    http://www.FreeRTOS.org - Documentation, latest information, license and
    contact details.

    http://www.SafeRTOS.com - A version that is certified for use in safety
    critical systems.

    http://www.OpenRTOS.com - Commercial support, development, porting,
    licensing and training services.
*/

#include "FreeRTOS.h"
#include "task.h"
#include "CommandInterpreter.h"

typedef struct xCOMMAND_INPUT_LIST
{
	const xCommandLineInput *pxCommandLineDefinition;
	struct xCOMMAND_INPUT_LIST *pxNext;
} xCommandLineInputListItem;

/*
 * The callback function that is executed when "help" is entered.  This is the
 * only default command that is always present.
 */
static const signed char *prvHelpCommand( void );

/* The definition of the "help" command.  This command is always at the front
of the list of registered commands. */
static const xCommandLineInput xHelpCommand = 
{
	"help",
	"help: Lists all the registered commands\r\n",
	prvHelpCommand
};

/* The definition of the list of commands.  Commands that are registered are
added to this list. */
static xCommandLineInputListItem xRegisteredCommands =
{	
	&xHelpCommand,	/* The first command in the list is always the help command, defined in this file. */
	NULL			/* The next pointer is initialised to NULL, as there are no other registered commands yet. */
};

/*-----------------------------------------------------------*/

portBASE_TYPE xCmdIntRegisterCommand( const xCommandLineInput * const pxCommandToRegister )
{
static xCommandLineInputListItem *pxLastCommandInList = &xRegisteredCommands;
xCommandLineInputListItem *pxNewListItem;
portBASE_TYPE xReturn = pdFAIL;

	/* Check the parameter is not NULL. */
	configASSERT( pxCommandToRegister );

	/* Create a new list item that will reference the command being registered. */
	pxNewListItem = ( xCommandLineInputListItem * ) pvPortMalloc( sizeof( xCommandLineInputListItem ) );
	configASSERT( pxNewListItem );

	if( pxNewListItem != NULL )
	{
		taskENTER_CRITICAL();
		{
			/* Reference the command being registered from the newly created 
			list item. */
			pxNewListItem->pxCommandLineDefinition = pxCommandToRegister;

			/* The new list item will get added to the end of the list, so 
			pxNext has nowhere to point. */
			pxNewListItem->pxNext = NULL;

			/* Add the newly created list item to the end of the already existing
			list. */
			pxLastCommandInList->pxNext = pxNewListItem;

			/* Set the end of list marker to the new list item. */
			pxLastCommandInList = pxNewListItem;
		}
		
		xReturn = pdPASS;
	}

	return xReturn;
}
/*-----------------------------------------------------------*/

const signed char *pcCmdIntProcessCommand( const signed char * const pcCommandInput )
{
static const xCommandLineInputListItem *pxCommand = NULL;
signed const char *pcReturn = NULL;

	/* Note:  This function is not re-entrant.  It must not be called from more
	thank one task. */

	if( pxCommand == NULL )
	{
		/* Search for the command string in the list of registered commands. */
		for( pxCommand = &xRegisteredCommands; pxCommand != NULL; pxCommand = pxCommand->pxNext )
		{
			if( strcmp( ( const char * ) pcCommandInput, ( const char * ) pxCommand->pxCommandLineDefinition->pcCommand ) == 0 )
			{
				/* The command has been found, the loop can exit so the command
				can be executed. */
				break;
			}
		}
	}

	if( pxCommand != NULL )
	{
		pcReturn = pxCommand->pxCommandLineDefinition->pxCommandInterpreter();

		/* If no strings were returned, then all the strings that are going to
		be returned by the current command have already been returned, and
		pxCommand can be reset to NULL ready to search for the next entered
		command. */
		if( pcReturn == NULL )
		{
			pxCommand = NULL;
		}
	}
	else
	{
		pcReturn = "Command not recognised.  Available commands are listed below.\r\n\r\n";

		/* Print out the help string. */
		pxCommand = &xRegisteredCommands;
	}

	return pcReturn;
}
/*-----------------------------------------------------------*/

static const signed char *prvHelpCommand( void )
{
static const xCommandLineInputListItem * pxCommand = &xRegisteredCommands;
signed const char *pcReturn;

	/* pxCommand will be NULL if all the commands in the list have already been
	returned. */
	if( pxCommand != NULL )
	{
		/* Return the next command help string, before moving the pointer on to
		the next command in the list. */
		pcReturn = pxCommand->pxCommandLineDefinition->pcHelpString;
		pxCommand = pxCommand->pxNext;
	}
	else
	{
		/* Reset the pointer back to the start of the list. */
		pxCommand = &xRegisteredCommands;

		/* Return NULL to show that there are no more strings to return. */
		pcReturn = NULL;
	}
	
	return pcReturn;
}

<commit_msg>Fix a few compiler warnings in utils when compiled with GCC.<commit_after>/*
    FreeRTOS V7.0.1 - Copyright (C) 2011 Real Time Engineers Ltd.
	

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS tutorial books are available in pdf and paperback.        *
     *    Complete, revised, and edited pdf reference manuals are also       *
     *    available.                                                         *
     *                                                                       *
     *    Purchasing FreeRTOS documentation will not only help you, by       *
     *    ensuring you get running as quickly as possible and with an        *
     *    in-depth knowledge of how to use FreeRTOS, it will also help       *
     *    the FreeRTOS project to continue with its mission of providing     *
     *    professional grade, cross platform, de facto standard solutions    *
     *    for microcontrollers - completely free of charge!                  *
     *                                                                       *
     *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
     *                                                                       *
     *    Thank you for using FreeRTOS, and thank you for your support!      *
     *                                                                       *
    ***************************************************************************


    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
    >>>NOTE<<< The modification to the GPL is included to allow you to
    distribute a combined work that includes FreeRTOS without being obliged to
    provide the source code for proprietary components outside of the FreeRTOS
    kernel.  FreeRTOS 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 General Public License for
    more details. You should have received a copy of the GNU General Public
    License and the FreeRTOS license exception along with FreeRTOS; if not it
    can be viewed here: http://www.freertos.org/a00114.html and also obtained
    by writing to <NAME>, contact details for whom are available on the
    FreeRTOS WEB site.

    1 tab == 4 spaces!

    http://www.FreeRTOS.org - Documentation, latest information, license and
    contact details.

    http://www.SafeRTOS.com - A version that is certified for use in safety
    critical systems.

    http://www.OpenRTOS.com - Commercial support, development, porting,
    licensing and training services.
*/

/* Standard includes. */
#include <string.h>

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"

/* Utils includes. */
#include "CommandInterpreter.h"

typedef struct xCOMMAND_INPUT_LIST
{
	const xCommandLineInput *pxCommandLineDefinition;
	struct xCOMMAND_INPUT_LIST *pxNext;
} xCommandLineInputListItem;

/*
 * The callback function that is executed when "help" is entered.  This is the
 * only default command that is always present.
 */
static const signed char *prvHelpCommand( void );

/* The definition of the "help" command.  This command is always at the front
of the list of registered commands. */
static const xCommandLineInput xHelpCommand = 
{
	( const signed char * const ) "help",
	( const signed char * const ) "help: Lists all the registered commands\r\n",
	prvHelpCommand
};

/* The definition of the list of commands.  Commands that are registered are
added to this list. */
static xCommandLineInputListItem xRegisteredCommands =
{	
	&xHelpCommand,	/* The first command in the list is always the help command, defined in this file. */
	NULL			/* The next pointer is initialised to NULL, as there are no other registered commands yet. */
};

/*-----------------------------------------------------------*/

portBASE_TYPE xCmdIntRegisterCommand( const xCommandLineInput * const pxCommandToRegister )
{
static xCommandLineInputListItem *pxLastCommandInList = &xRegisteredCommands;
xCommandLineInputListItem *pxNewListItem;
portBASE_TYPE xReturn = pdFAIL;

	/* Check the parameter is not NULL. */
	configASSERT( pxCommandToRegister );

	/* Create a new list item that will reference the command being registered. */
	pxNewListItem = ( xCommandLineInputListItem * ) pvPortMalloc( sizeof( xCommandLineInputListItem ) );
	configASSERT( pxNewListItem );

	if( pxNewListItem != NULL )
	{
		taskENTER_CRITICAL();
		{
			/* Reference the command being registered from the newly created 
			list item. */
			pxNewListItem->pxCommandLineDefinition = pxCommandToRegister;

			/* The new list item will get added to the end of the list, so 
			pxNext has nowhere to point. */
			pxNewListItem->pxNext = NULL;

			/* Add the newly created list item to the end of the already existing
			list. */
			pxLastCommandInList->pxNext = pxNewListItem;

			/* Set the end of list marker to the new list item. */
			pxLastCommandInList = pxNewListItem;
		}
		
		xReturn = pdPASS;
	}

	return xReturn;
}
/*-----------------------------------------------------------*/

const signed char *pcCmdIntProcessCommand( const signed char * const pcCommandInput )
{
static const xCommandLineInputListItem *pxCommand = NULL;
signed const char *pcReturn = NULL;

	/* Note:  This function is not re-entrant.  It must not be called from more
	thank one task. */

	if( pxCommand == NULL )
	{
		/* Search for the command string in the list of registered commands. */
		for( pxCommand = &xRegisteredCommands; pxCommand != NULL; pxCommand = pxCommand->pxNext )
		{
			if( strcmp( ( const char * ) pcCommandInput, ( const char * ) pxCommand->pxCommandLineDefinition->pcCommand ) == 0 )
			{
				/* The command has been found, the loop can exit so the command
				can be executed. */
				break;
			}
		}
	}

	if( pxCommand != NULL )
	{
		pcReturn = pxCommand->pxCommandLineDefinition->pxCommandInterpreter();

		/* If no strings were returned, then all the strings that are going to
		be returned by the current command have already been returned, and
		pxCommand can be reset to NULL ready to search for the next entered
		command. */
		if( pcReturn == NULL )
		{
			pxCommand = NULL;
		}
	}
	else
	{
		pcReturn = ( const signed char * const ) "Command not recognised.  Available commands are listed below.\r\n\r\n";

		/* Print out the help string. */
		pxCommand = &xRegisteredCommands;
	}

	return pcReturn;
}
/*-----------------------------------------------------------*/

static const signed char *prvHelpCommand( void )
{
static const xCommandLineInputListItem * pxCommand = &xRegisteredCommands;
signed const char *pcReturn;

	/* pxCommand will be NULL if all the commands in the list have already been
	returned. */
	if( pxCommand != NULL )
	{
		/* Return the next command help string, before moving the pointer on to
		the next command in the list. */
		pcReturn = pxCommand->pxCommandLineDefinition->pcHelpString;
		pxCommand = pxCommand->pxNext;
	}
	else
	{
		/* Reset the pointer back to the start of the list. */
		pxCommand = &xRegisteredCommands;

		/* Return NULL to show that there are no more strings to return. */
		pcReturn = NULL;
	}
	
	return pcReturn;
}


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