| gclib 528 Communications API for Galil controllers and PLCs |

remote_client.cpp
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1
10 #include "examples.h"
11
12 #include <iostream> //std::cout
13 #include <vector>
14 #include <string>
15
16 #ifdef _WIN32
17 #include <conio.h>
18 #elif __linux__
19 #include <ncurses.h>
20 #endif
21
22 using namespace std;
23
24 void print_client_message(const char* message)
25 {
26 #ifdef _WIN32
27 std::cout << message << std::endl;
28 #elif __linux__
29 printw(message);
30 printw("\n");
31 #endif
32 }
33
34 void print_servers_list(const std::vector<std::string>& server_list)
35 {
36 char buf[G_SMALL_BUFFER];
37
38
39 if (server_list.size() == 0)
40 {
41 print_client_message("none");
42 }
43 else
44 {
45 for (int i = 0; i < server_list.size(); i++)
46 {
47 std::string test = server_list[i];
48 sprintf(buf, "<%d> %s", i, test.c_str());
49 print_client_message(buf);
50 }
51 }
52 }
53
54 void servers_to_list(std::vector<std::string>& server_list, std::string servers)
55 {
56 server_list.clear();
57
58 if (servers.length() == 0)
59 return;
60
61 int index = 0;
62 std::string server;
63 while (index < servers.length())
64 {
65 if (servers[index] == '\n')
66 {
67 server_list.push_back(server);
68 server.clear();
69 }
70 else
71 {
72 server += servers[index];
73 }
74 index++;
75 }
76
77 server_list.push_back(server);
78 }
79
89 GReturn remote_client()
90 {
91 bool loop = true;
92 char servers[G_SMALL_BUFFER];
93 char buf[G_SMALL_BUFFER];
94 std::vector<std::string> server_list;
95
96 char instructions[] = "<s> List available servers on the network\n"
97 "<h> List available hardware on currently connected server\n"
98 "<0-9> Enter numbers 0-9 to connect to a server by index\n"
99 "<l> Set active server back to local server\n"
100 "<q> Quit\n";
101
102 #ifdef _WIN32
103 cout << instructions << std::endl;
104 #elif __linux__
105 //These functions set up the ncurses library to capture keyboard input
106 initscr(); // Initialization of ncurses library
107 cbreak(); // Capture one character at a time
108 noecho(); // Do not write back entered characters to the console
109 printw(instructions); //Print instructions to console
110 #endif
111
112 while (loop)
113 {
114 #ifdef _WIN32
115 char input = _getch(); //Capture keypress
116 #elif __linux__
117 char input = getch(); //Capture keypress
118 #endif
119 if(input == 'q')
120 loop = false;
121 else if (input == 's')
122 {
123 print_client_message("Available Servers:");
124 e(GListServers(servers, G_SMALL_BUFFER));
125
126 servers_to_list(server_list, servers);
127
128 print_servers_list(server_list);
129 }
130 else if(input >= '0' && input <= '9')
131 {
132 int index = input - '0';
133 if (server_list.size() > 0 && index < server_list.size())
134 {
135 e(GSetServer(server_list[index].c_str()));
136 sprintf(buf, "Server set to: %s", server_list[index].c_str());
137 print_client_message(buf);
138 }
139 }
140 else if (input == 'l')
141 {
142 e(GSetServer("Local"));
143 print_client_message("Server set to: Local");
144 }
145 else if (input == 'h')
146 {
147 e(GAddresses(buf, G_SMALL_BUFFER));
148 print_client_message(buf);
149 }
150 }
151
152 #if __linux__
153 endwin(); //Restores terminal to previous state
154 #endif
155
156 return GALIL_EXAMPLE_OK;
157 }
examples.h
remote_client
GReturn remote_client()
Lists available remote servers and allows connection to remote server.
Definition: remote_client.cpp:89
GSetServer
GCLIB_DLL_EXPORTED GReturn GCALL GSetServer(GCStringIn server_name)
Uses GUtility(), G_UTIL_GCAPS_SET_SERVER to set the new active server.
Definition: gclibo.c:114
message
GReturn message(GCon g)
Demonstrates how to receive messages from the controller and detect differences in Trace and crashed ...
Definition: message.cpp:14
GAddresses
GCLIB_DLL_EXPORTED GReturn GCALL GAddresses(GCStringOut addresses, GSize addresses_len)
Uses GUtility(), G_UTIL_GCAPS_ADDRESSES or G_UTIL_ADDRESSES to provide a listing of all available con...
Definition: gclibo.c:54
G_SMALL_BUFFER
#define G_SMALL_BUFFER
Most reads from Galil are small. This value will easily hold most, e.g. TH, TZ, etc.
Definition: gclib.h:87
e
void e(GReturn rc)
A trivial, C++ style return code check used in Galil's examples and demos.
Definition: examples.h:30
GReturn
int GReturn
Every function returns a value of type GReturn. See gclib_errors.h for possible values.
Definition: gclib.h:91
GListServers
GCLIB_DLL_EXPORTED GReturn GCALL GListServers(GCStringOut servers, GSize servers_len)
Uses GUtility(), G_UTIL_GCAPS_LIST_SERVERS to provide a list of all available gcaps services on the l...
Definition: gclibo.c:155