menu/menu.c at master · mengning/menu · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165

/**************************************************************************************************/
/* Copyright (C) mc2lab.com, SSE@USTC, 2014-2015                                                  */
/*                                                                                                */
/*  FILE NAME             :  menu.c                                                               */
/*  PRINCIPAL AUTHOR      :  Mengning                                                             */
/*  SUBSYSTEM NAME        :  menu                                                                 */
/*  MODULE NAME           :  menu                                                                 */
/*  LANGUAGE              :  C                                                                    */
/*  TARGET ENVIRONMENT    :  ANY                                                                  */
/*  DATE OF FIRST RELEASE :  2014/08/31                                                           */
/*  DESCRIPTION           :  This is a menu program                                               */
/**************************************************************************************************/

/*
 * Revision log:
 *
 * Created by Mengning, 2014/08/31
 *
 */


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "linktable.h"
#include "menu.h"

tLinkTable * head = NULL;
int Help();
int Quit();

#define CMD_MAX_LEN 		1024
#define CMD_MAX_ARGV_NUM 	32
#define DESC_LEN    		1024
#define CMD_NUM     		10

char prompt[CMD_MAX_LEN] = "Input Cmd >";

/* data struct and its operations */

typedef struct DataNode
{
    tLinkTableNode * pNext;
    char*   cmd;
    char*   desc;
    int     (*handler)(int argc, char *argv[]);
} tDataNode;

int SearchConditon(tLinkTableNode * pLinkTableNode,void * arg)
{
    char * cmd = (char*)arg;
    tDataNode * pNode = (tDataNode *)pLinkTableNode;
    if(strcmp(pNode->cmd, cmd) == 0)
    {
        return  SUCCESS;
    }
    return FAILURE;
}
/* find a cmd in the linklist and return the datanode pointer */
tDataNode* FindCmd(tLinkTable * head, char * cmd)
{
    tDataNode * pNode = (tDataNode*)GetLinkTableHead(head);
    while(pNode != NULL)
    {
        if(!strcmp(pNode->cmd, cmd))
        {
            return  pNode;
        }
        pNode = (tDataNode*)GetNextLinkTableNode(head,(tLinkTableNode *)pNode);
    }
    return NULL;
}

/* show all cmd in listlist */
int ShowAllCmd(tLinkTable * head)
{
    tDataNode * pNode = (tDataNode*)GetLinkTableHead(head);
    while(pNode != NULL)
    {
        printf("    * %s - %s\n", pNode->cmd, pNode->desc);
        pNode = (tDataNode*)GetNextLinkTableNode(head,(tLinkTableNode *)pNode);
    }
    return 0;
}

int Help(int argc, char *argv[])
{
    ShowAllCmd(head);
    return 0;
}

int SetPrompt(char * p)
{
    if (p == NULL)
    {
        return 0;
    }
    strcpy(prompt,p);
    return 0;
}
/* add cmd to menu */
int MenuConfig(char * cmd, char * desc, int (*handler)())
{
    tDataNode* pNode = NULL;
    if ( head == NULL)
    {
        head = CreateLinkTable();
        pNode = (tDataNode*)malloc(sizeof(tDataNode));
        pNode->cmd = "help";
        pNode->desc = "Menu List";
        pNode->handler = Help;
        AddLinkTableNode(head,(tLinkTableNode *)pNode);
    }
    pNode = (tDataNode*)malloc(sizeof(tDataNode));
    pNode->cmd = cmd;
    pNode->desc = desc;
    pNode->handler = handler;
    AddLinkTableNode(head,(tLinkTableNode *)pNode);
    return 0;
}


/* Menu Engine Execute */
int ExecuteMenu()
{
   /* cmd line begins */
    while(1)
    {
		int argc = 0;
		char *argv[CMD_MAX_ARGV_NUM];
        char cmd[CMD_MAX_LEN];
		char *pcmd = NULL;
        printf("%s",prompt);
        /* scanf("%s", cmd); */
		pcmd = fgets(cmd, CMD_MAX_LEN, stdin);
		if(pcmd == NULL)
		{
			continue;
		}
        /* convert cmd to argc/argv */
		pcmd = strtok(pcmd," ");
		while(pcmd != NULL && argc < CMD_MAX_ARGV_NUM)
		{
			argv[argc] = pcmd;
			argc++;
			pcmd = strtok(NULL," ");
		}
        if(argc == 1)
        {
            int len = strlen(argv[0]);
            *(argv[0] + len - 1) = '\0';
        }
        tDataNode *p = (tDataNode*)SearchLinkTableNode(head,SearchConditon,(void*)argv[0]);
        if( p == NULL)
        {
            continue;
        }
        printf("%s - %s\n", p->cmd, p->desc);
        if(p->handler != NULL)
        {
            p->handler(argc, argv);
        }
    }
}