cmdlist.c

psoc_usb的代码,用来小卡测试的.没事下下来

//-----------------------------------------------------------------------------
// Contents:  main module of a simple firmware
//
// Copyright: Inventec Electronics(Tianjin) Co., Ltd.
// $Archive:  cmdlist.c
// $Date:     2007-08-06
// $Revision: 1.00
//
//-----------------------------------------------------------------------------
// Copyright 2006, [e-mail]
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "cmdlist.h"

//global variable
struct command_list * g_cmdlist = NULL;
struct command_list * g_retlist = NULL;

//--------------------------------------------------------------------------------
//get command list tail
//--------------------------------------------------------------------------------
struct command_list * get_cmdlist_tail()
{
        struct command_list *plist;
        
        plist=g_cmdlist;
        if (plist!=NULL){
                while(plist->next!=NULL)
                        plist=plist->next;
        }
        
        return plist;
}


//--------------------------------------------------------------------------------
//add a command to list
//--------------------------------------------------------------------------------
struct command_list * add_to_cmdlist(char * cmd)
{
        struct command_list *plist;
        struct command_list *ptemp;
        
        if (strlen(cmd)>=MAX_CMD_LENGTH) //too long
                return NULL;
               
        ptemp=malloc(sizeof(struct command_list));
        if(ptemp==NULL) //alloc error
                return NULL;

        memset(ptemp,0,sizeof(struct command_list)); 
        strcpy(ptemp->message,cmd);
        plist=get_cmdlist_tail();
        if (plist==NULL){
                g_cmdlist=ptemp;
        }else{
                plist->next=ptemp;
        }
        return ptemp;
}


//--------------------------------------------------------------------------------
//free command list
//--------------------------------------------------------------------------------
void free_cmdlist()
{
        struct command_list *plist;
        
        plist=g_cmdlist;
        while(plist!=NULL){
                g_cmdlist=g_cmdlist->next;
                free(plist);
                plist=g_cmdlist;
        }
        g_cmdlist = NULL;
        return;
}


//=============================================================================
/*
 * The Interface description:
 *      get ret_msg_list tail pointer
 * Parameters: 
 *      <none>
 * Return Value:
 *      pointer for g_cmd_info.cmd_msg
 * Remark: 
 *      
 */
//=============================================================================
struct command_list * get_retlist_tail()
{
        struct command_list *plist;
        
        plist = g_retlist;
        if (plist != NULL){
                while(plist->next!=NULL) {
                        plist=plist->next;
                }
        }
        
        return plist;
}

//=============================================================================
/*
 * The Interface description:
 *      add return message to g_cmd_info.ret_msg_list 
 *      for output to cli as echo message
 * Parameters: 
 *      cmd[in]: cmd string from cli,
 * Return Value:
 *      pointer for new message_st, NULL if error
 * Remark: 
 *      
 */
//=============================================================================
struct command_list * add_to_retlist(char * cmd)
{
        struct command_list *plist;
        struct command_list *ptemp;
        
        if (strlen(cmd) > MAX_CMD_LENGTH) {//too long
                return NULL;
        }
               
        ptemp = malloc(sizeof(struct command_list));
        if(ptemp == NULL) {//alloc error
                return NULL;
        }

        memset(ptemp,0,sizeof(struct command_list)); 
        strcpy(ptemp->message,cmd);
        plist = get_retlist_tail();
        
        if (plist == NULL){
                g_retlist = ptemp;
        }else{
                plist->next = ptemp;
        }
        return ptemp;
}



//=============================================================================
/*
 * The Interface description:
 *      free g_cmd_info.ret_msg_list
 * Parameters: 
 *      <none>
 * Return Value:
 *      <none>
 * Remark: 
 *      
 */
//=============================================================================
void free_retlist()
{
        struct command_list *plist;
        
        plist = g_retlist;
        while(plist != NULL){
                g_retlist=g_retlist->next;
                free(plist);
                plist = g_retlist;
        }
        
        g_retlist = NULL;
        return;
}