Modified channel handling; full DiSEqC support

sources.c

@@ -0,0 +1,104 @@
+/*
+ * sources.c: Source handling
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: sources.c 1.1 2002/10/06 09:27:10 kls Exp $
+ */
+
+#include "sources.h"
+#include <ctype.h>
+
+// -- cSource ----------------------------------------------------------------
+
+cSource::cSource(void)
+{
+  code = stNone;
+  description = NULL;
+}
+
+cSource::~cSource()
+{
+  free(description);
+}
+
+bool cSource::Parse(const char *s)
+{
+  char *codeBuf = NULL;
+  if (2 == sscanf(s, "%a[^ ] %a[^\n]", &codeBuf, &description))
+     code = FromString(codeBuf);
+  free(codeBuf);
+  return code != stNone && description && *description;
+}
+
+const char *cSource::ToString(int Code)
+{
+  static char buffer[16];
+  char *q = buffer;
+  switch (Code & st_Mask) {
+    case stCable: *q++ = 'C'; break;
+    case stSat:   *q++ = 'S';
+                  {
+                    int pos = Code & ~st_Mask;
+                    q += snprintf(q, sizeof(buffer) - 2, "%u.%u", (pos & ~st_Neg) / 10, (pos & ~st_Neg) % 10); // can't simply use "%g" here since the silly 'locale' messes up the decimal point
+                    *q++ = (Code & st_Neg) ? 'E' : 'W';
+                  }
+                  break;
+    case stTerr:  *q++ = 'T'; break;
+    default:      *q++ = Code + '0'; // backward compatibility
+    }
+  *q = 0;
+  return buffer;
+}
+
+int cSource::FromString(const char *s)
+{
+  int type = stNone;
+  switch (toupper(*s)) {
+    case 'C': type = stCable; break;
+    case 'S': type = stSat;   break;
+    case 'T': type = stTerr;  break;
+    case '0' ... '9': type = *s - '0'; break; // backward compatibility
+    default: esyslog("ERROR: unknown source key '%c'", *s);
+             return stNone;
+    }
+  int code = type;
+  if (type == stSat) {
+     int pos = 0;
+     bool dot = false;
+     bool neg = false;
+     while (*++s) {
+           switch (toupper(*s)) {
+             case '0' ... '9': pos *= 10;
+                               pos += *s - '0';
+                               break;
+             case '.':         dot = true;
+                               break;
+             case 'E':         neg = true; // fall through to 'W'
+             case 'W':         if (!dot)
+                                  pos *= 10;
+                               break;
+             default: esyslog("ERROR: unknown source character '%c'", *s);
+                      return stNone;
+             }
+           }
+     if (neg)
+        pos |= st_Neg;
+     code |= pos;
+     }
+  return code;
+}
+
+// -- cSources ---------------------------------------------------------------
+
+cSources Sources;
+
+cSource *cSources::Get(int Code)
+{
+  for (cSource *p = First(); p; p = Next(p)) {
+      if (p->Code() == Code)
+         return p;
+      }
+  return NULL;
+}