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
| #include <iostream>
#include <string>
using namespace std;
class ModStream;
using TModStreamIO =int (ModStream::*)(char** buf,int sz);
using TModStreamOCF =int (ModStream::*)();
using TModStreamSeek=int (ModStream::*)(int pos);
// j'arrive a faire les using de class fonctor maintenant NA !
struct CB{
ModStream* ctx;
TModStreamIO _read;
TModStreamIO _write;
TModStreamOCF _open;
TModStreamOCF _close;
TModStreamOCF _flush;
TModStreamSeek _seek;
} cb;
class ServerStream{
public:
string type=""; // CTTI :p
CB cb;
ServerStream(){
cb.ctx=NULL;
}
virtual int write(char** buf, int sz){
return (cb.ctx->*cb._write)(buf, sz);
}
virtual int read(char** buf, int sz){
return (cb.ctx->*cb._read)(buf, sz);
}
};
class ModStream{
protected:
CB oldcb;
virtual int _read(char** buf,int sz){
if(!oldcb.ctx) return 0;
if(oldcb._read) return (oldcb.ctx->*oldcb._read)(buf,sz);
return -1;
}
virtual int _write(char** buf, int sz){
if(!oldcb.ctx) return 0;
if(oldcb._write) return (oldcb.ctx->*oldcb._write)(buf,sz);
return -1;
}
virtual int _open(){
if(!oldcb.ctx) return 0;
if(oldcb._open)return (oldcb.ctx->*oldcb._open)();
return -1;
}
virtual int _close(){
if(!oldcb.ctx) return 0;
if(oldcb._close) return (oldcb.ctx->*oldcb._close)();
return -1;
}
virtual int _flush(){
if(!oldcb.ctx) return 0;
if(oldcb._flush) return (oldcb.ctx->*oldcb._flush)();
return -1;
}
virtual int _seek(int pos){
if(!oldcb.ctx) return 0;
if(oldcb._seek) return (oldcb.ctx->*oldcb._seek)(pos);
return pos;
}
public:
ModStream(ServerStream *slf){
oldcb=slf->cb;
slf->cb.ctx=this;
slf->cb._open =(TModStreamOCF)&ModStream::_open;
slf->cb._close=(TModStreamOCF)&ModStream::_close;
slf->cb._flush=(TModStreamOCF)&ModStream::_open;
slf->cb._write=(TModStreamIO) &ModStream::_write;
slf->cb._read =(TModStreamIO) &ModStream::_read;
}
};
class FileStream:public ServerStream{
protected:
string filename;
bool opened=false;
public:
FileStream(){
cout << "File::"<<endl;
type="FileStream";
}
int open(string fn){
filename=fn;
cout << "File::open name="<<filename<<endl;
opened=true;
return (cb.ctx->*cb._open)();
}
int flush(string fn){
cout << "File::flush name="<<filename<<endl;
return (cb.ctx->*cb._open)();
}
int close(){
int err=(cb.ctx->*cb._close)();
cout << "File::close name="<<filename<<endl;
return err;
}
virtual int read(char** buf, int sz){
cout <<"File::read in "<<filename<<endl;
return ServerStream::read(buf,sz);
}
virtual int write(char** buf, int sz){
cout <<"File::write in "<<filename<<endl;
int err= ServerStream::write(buf,sz);
return err;
}
};
class Enc:public ModStream{
private:
string key;
bool opened=false;
protected:
virtual int _read(char** buf,int sz){
cout << "Enc::read"<<endl;
return ModStream::_read(buf,sz);
}
virtual int _write(char** buf, int sz){
cout << "Enc::write key="<<key <<endl;
return ModStream::_read(buf,sz);
}
virtual int _open(){
if(key.empty()) return -1;
opened=true;
cout << "Enc::open key="<<key << endl;
return ModStream::_open();
}
virtual int _close(){
cout << "Enc::close"<<endl;
return ModStream::_close();
}
virtual int _flush(){
cout << "Enc::flush"<<endl;
return ModStream::_flush();
}
virtual int _seek(int pos){
cout << "Enc::seek"<<endl;
return ModStream::_seek(pos);;
}
public:
Enc(ServerStream* slf):ModStream(slf){
slf->type+="+Enc";
cout << "Enc::"<<endl;
}
int setKey(string k){
if (opened) return -1;
key=k;
return 0;
}
};
class Zip:public ModStream{
public:
int ratio=9;
bool opened=false;
protected:
virtual int _read(char** buf,int sz){
cout << "Zip::read ratio="<<ratio<<endl;
return ModStream::_read(buf,sz);
}
virtual int _write(char** buf, int sz){
cout << "Zip::write"<<endl;
return ModStream::_read(buf,sz);
}
virtual int _open(){
cout << "Zip::open ratio="<<ratio<<endl;
return ModStream::_open();
}
virtual int _close(){
cout << "Zip::close"<<endl;
return ModStream::_close();
}
virtual int _flush(){
cout << "Zip::flush"<<endl;
return ModStream::_flush();
}
virtual int _seek(int pos){
cout << "Zip::seek"<<endl;
return ModStream::_seek(pos);
}
public:
Zip(ServerStream* slf):ModStream(slf){
slf->type+="+Zip";
cout << "Zip::"<<endl;
}
int setRatio(int r){
if(opened) return -1;
ratio=r;
return 0;
}
};
// ce que le ender user ecrira //
class MyStream:public FileStream,public Zip,public Enc{
public:
MyStream():Zip(this),Enc(this){};
};
int main(int argc, char** argv){
MyStream myStream;
cout << myStream.type << endl;
myStream.setKey("1234");
myStream.setRatio(5);
cout << myStream.open("totor.txt") << endl;
} |
