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
|
/*
* diseqc.c: DiSEqC handling
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: diseqc.c 2.0 2008/02/10 14:09:27 kls Exp $
*/
#include "diseqc.h"
#include <ctype.h>
#include "sources.h"
#include "thread.h"
// --- cDiseqc ---------------------------------------------------------------
cDiseqc::cDiseqc(void)
{
commands = NULL;
parsing = false;
numCodes = 0;
}
cDiseqc::~cDiseqc()
{
free(commands);
}
bool cDiseqc::Parse(const char *s)
{
bool result = false;
char *sourcebuf = NULL;
int fields = sscanf(s, "%a[^ ] %d %c %d %a[^\n]", &sourcebuf, &slof, &polarization, &lof, &commands);
if (fields == 4)
commands = NULL; //XXX Apparently sscanf() doesn't work correctly if the last %a argument results in an empty string
if (4 <= fields && fields <= 5) {
source = cSource::FromString(sourcebuf);
if (Sources.Get(source)) {
polarization = toupper(polarization);
if (polarization == 'V' || polarization == 'H' || polarization == 'L' || polarization == 'R') {
parsing = true;
char *CurrentAction = NULL;
while (Execute(&CurrentAction) != daNone)
;
parsing = false;
result = !commands || !*CurrentAction;
}
else
esyslog("ERROR: unknown polarization '%c'", polarization);
}
else
esyslog("ERROR: unknown source '%s'", sourcebuf);
}
free(sourcebuf);
return result;
}
char *cDiseqc::Wait(char *s)
{
char *p = NULL;
errno = 0;
int n = strtol(s, &p, 10);
if (!errno && p != s && n >= 0) {
if (!parsing)
cCondWait::SleepMs(n);
return p;
}
esyslog("ERROR: invalid value for wait time in '%s'", s - 1);
return NULL;
}
char *cDiseqc::Codes(char *s)
{
char *e = strchr(s, ']');
if (e) {
numCodes = 0;
char *t = s;
char *p = s;
while (t < e) {
if (numCodes < MaxDiseqcCodes) {
errno = 0;
int n = strtol(t, &p, 16);
if (!errno && p != t && 0 <= n && n <= 255) {
codes[numCodes++] = n;
t = skipspace(p);
}
else {
esyslog("ERROR: invalid code at '%s'", t);
return NULL;
}
}
else {
esyslog("ERROR: too many codes in code sequence '%s'", s - 1);
return NULL;
}
}
return e + 1;
}
else
esyslog("ERROR: missing closing ']' in code sequence '%s'", s - 1);
return NULL;
}
cDiseqc::eDiseqcActions cDiseqc::Execute(char **CurrentAction)
{
if (!*CurrentAction)
*CurrentAction = commands;
while (*CurrentAction && **CurrentAction) {
switch (*(*CurrentAction)++) {
case ' ': break;
case 't': return daToneOff;
case 'T': return daToneOn;
case 'v': return daVoltage13;
case 'V': return daVoltage18;
case 'A': return daMiniA;
case 'B': return daMiniB;
case 'W': *CurrentAction = Wait(*CurrentAction); break;
case '[': *CurrentAction = Codes(*CurrentAction); return *CurrentAction ? daCodes : daNone;
default: return daNone;
}
}
return daNone;
}
// --- cDiseqcs --------------------------------------------------------------
cDiseqcs Diseqcs;
cDiseqc *cDiseqcs::Get(int Source, int Frequency, char Polarization)
{
for (cDiseqc *p = First(); p; p = Next(p)) {
if (p->Source() == Source && p->Slof() > Frequency && p->Polarization() == toupper(Polarization))
return p;
}
return NULL;
}
|
