TACS support (variations added to AMPS code)

These are:

- Bandwidth only 25 KHz, so lower deviations
- Data rate only 8000 KHz
- SID is called AID (Area ID)
- MIN1 coding is different

src/tacs/stations.c

@@ -0,0 +1,89 @@
+#include <stdio.h>
+#include <string.h>
+#include "../amps/stations.h"
+
+/* area codes */
+static struct tacs_areas {
+	const char *number;		/* country code (first 3 digits of subscriber number) + area code */
+	const char *carrier;		/* name of carrier */
+	const char *country;		/* name of country */
+	const char *national_prefix; /* digits to dial inside country */
+} tacs_areas[] = {
+	{ "2220",	"Telecom Italia Mobile",	"Italy",		"0336" },
+	{ "2222",	"Telecom Italia Mobile",	"Italy",		"0337" },
+	{ "2224",	"Telecom Italia Mobile",	"Italy",		"0330" },
+	{ "2225",	"Telecom Italia Mobile",	"Italy",		"0360" },
+	{ "2226",	"Telecom Italia Mobile",	"Italy",		"0368" },
+	{ "2340",	"Vodafone",			"United Kingdom",	"0836" },
+	{ "2341",	"Vodafone",			"United Kingdom",	"0421" },
+	{ "2342",	"CellNet",			"United Kingdom",	"0860" },
+	{ "2343",	"Vodafone",			"United Kingdom",	"0378" },
+	{ "2344",	"Vodafone",			"United Kingdom",	"0831" },
+	{ "2345",	"Vodafone",			"United Kingdom",	"0374" },
+	{ "2346",	"CellNet",			"United Kingdom",	"0850" },
+	{ "2347",	"CellNet",			"United Kingdom",	"0589" },
+	{ "2348",	"CellNet",			"United Kingdom",	"0402" },
+	{ "2349",	"CellNet",			"United Kingdom",	"0585" },
+	{ NULL, NULL, NULL, NULL }
+};
+
+void numbering(const char *number, const char **carrier, const char **country, const char **national_number)
+{
+	int i;
+	static char digits[64];
+
+	for (i = 0; tacs_areas[i].carrier; i++) {
+		if (!strncmp(number, tacs_areas[i].number, 4)) {
+			*carrier = tacs_areas[i].carrier;
+			*country = tacs_areas[i].country;
+			if (tacs_areas[i].national_prefix) {
+				strcpy(digits, tacs_areas[i].national_prefix);
+				strcat(digits, number + 4);
+				*national_number = digits;
+			}
+		}
+	}
+}
+
+/*
+	1: the AID, system Identification number
+	2: the telephone company name
+	3: the country
+*/
+static struct tacs_stations {
+	int aid;
+	const char *carrier, *country;
+} tacs_stations[] = {
+	{ -1,		"Telecom Italia Mobile",	"Italy" },
+	{ 3600,		"CellNet",			"United Kingdom" },
+	{ 2051,		"VodaFone",			"United Kingdom" },
+	{ 0, NULL, NULL }
+};
+
+void list_stations(void)
+{
+	int i;
+
+	for (i = 0; tacs_stations[i].carrier; i++) {
+		if (tacs_stations[i].aid >= 0)
+			printf("AID:%5d", tacs_stations[i].aid);
+		else
+			printf("AID:  ???");
+		printf(" Carrier: %s, %s\n", tacs_stations[i].carrier, tacs_stations[i].country);
+	}
+}
+
+void sid_stations(int aid)
+{
+	int i, first = 1;
+
+	for (i = 0; tacs_stations[i].carrier; i++) {
+		if (aid == tacs_stations[i].aid) {
+			if (first)
+				printf("Selected Area ID (AID) %d belongs to:\n", tacs_stations[i].aid);
+			first = 0;
+			printf("\t%s, %s\n",  tacs_stations[i].carrier, tacs_stations[i].country);
+		}
+	}
+}
+