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/*
* diseqc.c: DiSEqC handling
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: diseqc.c 1.2 2002/12/07 13:44:56 kls Exp $
*/
#include "diseqc.h"
#include <ctype.h>
#include "sources.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') {
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)
usleep(n * 1000);
return p;
}
esyslog("ERROR: illegal 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: illegal 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;
}
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