Colony

/**

 *

 *  @author Jason Knichel

 *

 *  3/22/07

 */

#include <stdio.h>

#include <string.h>

#include <ctype.h>

#include "includes/Client.h"

#include "includes/Commands.h"

void Commands::printUsage()

{

  printf("\nAvailable commands:\n");

  printf("buzzer\n");

  printf("lcd\n");

  printf("type \"help <command>\" for more information\n\n");

}

int Commands::parseCommand(char * command, Server server)

{

  if (!command)

    return -1;

  if (strlen(command) > MAX_INPUT_LENGTH)

    return -1;

  char tempCommand[MAX_INPUT_LENGTH];

  strcpy(tempCommand, command);

  char tokens[MAX_TOKENS][MAX_TOKEN_SIZE];

  int numTokens = 0;

  if ((numTokens = tokenizeCommand(tempCommand, tokens)) < 1)

    {

      return -1;

    }

  if (strcmp(tokens[0], "help") == 0)

    {

      if (numTokens == 1)

        {

          printUsage();

          return 0;

        }

      if (strcmp(tokens[1], "buzzer") == 0)

        {

          buzzer.printUsage();

        }

      else if (strcmp(tokens[1], "lcd") == 0)

        {

          lcd.printUsage();

        }

    }

  else if (strcmp(tokens[0], "buzzer") == 0)

    {

      if (buzzer.parseCommand(tokens, numTokens, server) < 0)

        {

          return -1;

        }

    }

  else if (strcmp(tokens[0], "lcd") == 0)

    {

      if (lcd.parseCommand(tokens, numTokens, server) < 0)

        {

          return -1;

        }

    }

  else

    {

      printf("Invalid command.\n");

    }

  return 0;

}

int tokenizeCommand(char* command, 

                           char tokens[MAX_TOKENS][MAX_TOKEN_SIZE])

{

  char* nextToken = command;

  char* endToken = NULL;

  int numTokens = 0;

  if (!command) {

    return -1;

  }

  while ((endToken = strstr(nextToken, " "))) {

    *endToken = '\0';

    if (strlen(nextToken) > MAX_TOKEN_SIZE-1) {

      return -1;

    }

    strcpy(tokens[numTokens], nextToken);

    numTokens++;

    nextToken = endToken + 1;

    while (isspace(*nextToken) && *nextToken != '\0') {

      nextToken++;

    }

  }

  if (endToken == NULL && *nextToken != '\0') {

    int nextTokenLen = strlen(nextToken);

    if (nextTokenLen > MAX_TOKEN_SIZE-1) {

      return -1;

    }

    if (nextToken[nextTokenLen-1] == '\n')

      nextToken[nextTokenLen-1] = '\0';

    strcpy(tokens[numTokens], nextToken);

    numTokens++;

  }

  return numTokens;

}