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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
#include "readline_buffer.h"
#include "string_tools.h"
#include <readline/readline.h>
#include <readline/history.h>
#include <iostream>
#include <boost/thread/mutex.hpp>
#include <boost/thread/lock_guard.hpp>
#include <boost/algorithm/string.hpp>
static bool same_as_last_line(const std::string&);
static void install_line_handler();
static void remove_line_handler();
static boost::mutex sync_mutex;
static rdln::linestatus line_stat;
static char *the_line;
namespace
{
rdln::readline_buffer* current = NULL;
}
rdln::suspend_readline::suspend_readline()
: m_buffer(NULL), m_restart(false)
{
m_buffer = current;
if(!m_buffer)
return;
m_restart = m_buffer->is_running();
if(m_restart)
m_buffer->stop();
}
rdln::suspend_readline::~suspend_readline()
{
if(!m_buffer)
return;
if(m_restart)
m_buffer->start();
}
std::vector<std::string>& rdln::readline_buffer::completion_commands()
{
static std::vector<std::string> commands = {"exit"};
return commands;
}
rdln::readline_buffer::readline_buffer()
: std::stringbuf(), m_cout_buf(NULL), m_prompt_length(0)
{
current = this;
}
void rdln::readline_buffer::start()
{
boost::lock_guard<boost::mutex> lock(sync_mutex);
if(m_cout_buf != NULL)
return;
m_cout_buf = std::cout.rdbuf();
std::cout.rdbuf(this);
install_line_handler();
}
void rdln::readline_buffer::stop()
{
boost::lock_guard<boost::mutex> lock(sync_mutex);
if(m_cout_buf == NULL)
return;
std::cout.rdbuf(m_cout_buf);
m_cout_buf = NULL;
remove_line_handler();
}
rdln::linestatus rdln::readline_buffer::get_line(std::string& line) const
{
boost::lock_guard<boost::mutex> lock(sync_mutex);
line_stat = rdln::partial;
if (!m_cout_buf)
{
line = "";
return rdln::full;
}
rl_callback_read_char();
if (line_stat == rdln::full)
{
line = the_line;
free(the_line);
the_line = NULL;
}
return line_stat;
}
void rdln::readline_buffer::set_prompt(const std::string& prompt)
{
boost::lock_guard<boost::mutex> lock(sync_mutex);
if(m_cout_buf == NULL)
return;
rl_set_prompt(std::string(m_prompt_length, ' ').c_str());
rl_redisplay();
rl_set_prompt(prompt.c_str());
rl_redisplay();
m_prompt_length = prompt.size();
}
void rdln::readline_buffer::add_completion(const std::string& command)
{
if(std::find(completion_commands().begin(), completion_commands().end(), command) != completion_commands().end())
return;
completion_commands().push_back(command);
}
const std::vector<std::string>& rdln::readline_buffer::get_completions()
{
return completion_commands();
}
int rdln::readline_buffer::sync()
{
boost::lock_guard<boost::mutex> lock(sync_mutex);
if (m_cout_buf == nullptr)
{
return -1;
}
#if RL_READLINE_VERSION < 0x0700
char lbuf[2] = {0,0};
char *line = NULL;
int end = 0, point = 0;
#endif
if (rl_end || (rl_prompt && *rl_prompt))
{
#if RL_READLINE_VERSION >= 0x0700
rl_clear_visible_line();
#else
line = rl_line_buffer;
end = rl_end;
point = rl_point;
rl_line_buffer = lbuf;
rl_end = 0;
rl_point = 0;
rl_save_prompt();
rl_redisplay();
#endif
}
do
{
m_cout_buf->sputc( this->sgetc() );
}
while ( this->snextc() != EOF );
#if RL_READLINE_VERSION < 0x0700
if (end || (rl_prompt && *rl_prompt))
{
rl_restore_prompt();
rl_line_buffer = line;
rl_end = end;
rl_point = point;
}
#endif
rl_on_new_line();
rl_redisplay();
return 0;
}
static void handle_line(char* line)
{
bool exit = false;
if (line)
{
line_stat = rdln::full;
the_line = line;
std::string test_line = line;
epee::string_tools::trim_right(test_line);
if(!test_line.empty())
{
if (!same_as_last_line(test_line))
{
add_history(test_line.c_str());
history_set_pos(history_length);
}
if (test_line == "exit" || test_line == "q")
exit = true;
}
} else
/* EOF */
{
line_stat = rdln::empty;
exit = true;
}
rl_done = 1;
if (exit)
rl_set_prompt("");
return;
}
// same_as_last_line returns true, if the last line in the history is
// equal to test_line.
static bool same_as_last_line(const std::string& test_line)
{
// Note that state->offset == state->length, when a new line was entered.
HISTORY_STATE* state = history_get_history_state();
return state->length > 0
&& test_line.compare(state->entries[state->length-1]->line) == 0;
}
static char* completion_matches(const char* text, int state)
{
static size_t list_index;
static size_t len;
if(state == 0)
{
list_index = 0;
len = strlen(text);
}
const std::vector<std::string>& completions = rdln::readline_buffer::get_completions();
for(; list_index<completions.size(); )
{
const std::string& cmd = completions[list_index++];
if(cmd.compare(0, len, text) == 0)
{
return strdup(cmd.c_str());
}
}
return NULL;
}
static char** attempted_completion(const char* text, int start, int end)
{
rl_attempted_completion_over = 1;
return rl_completion_matches(text, completion_matches);
}
static void install_line_handler()
{
#if RL_READLINE_VERSION >= 0x0801
rl_variable_bind("enable-bracketed-paste", "off");
#endif
rl_attempted_completion_function = attempted_completion;
rl_callback_handler_install("", handle_line);
stifle_history(500);
}
static void remove_line_handler()
{
rl_replace_line("", 0);
rl_set_prompt("");
rl_redisplay();
rl_callback_handler_remove();
}
void rdln::clear_screen()
{
rl_clear_screen(0, 0);
}
|
