Import code to generate RRLP ephemeris data from u-blox GPS receiver
taken from http://www.246tnt.com/files/rrlp-20091101.tar.bz2
diff --git a/rrlp-ephemeris/main.c b/rrlp-ephemeris/main.c
new file mode 100644
index 0000000..bb025a2
--- /dev/null
+++ b/rrlp-ephemeris/main.c
@@ -0,0 +1,99 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "gps.h"
+#include "ubx.h"
+#include "ubx-parse.h"
+#include "rrlp.h"
+
+static int
+do_ubx_read(struct gps_assist_data *gps, const char *filename)
+{
+ int rv, fd, i;
+ struct stat st;
+ void *buf;
+
+ /* Load file */
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ rv = fstat(fd, &st);
+ if (rv < 0) {
+ close(fd);
+ return -1;
+ }
+
+ buf = malloc(st.st_size);
+ if (!buf) {
+ close(fd);
+ return -1;
+ }
+
+ rv = read(fd, buf, st.st_size);
+ if (rv != st.st_size) {
+ free(buf);
+ close(fd);
+ return -1;
+ }
+
+ /* Parse each message */
+ for (i=0; i<st.st_size;) {
+ int rv;
+ rv = ubx_msg_dispatch(ubx_parse_dt, buf + i, st.st_size - i, gps);
+ if (rv < 0)
+ i++; /* Invalid message: try one byte later */
+ else
+ i += rv;
+ }
+
+ /* Done */
+ free(buf);
+ close(fd);
+
+ return 0;
+}
+
+static int
+do_rrlp(struct gps_assist_data *gps)
+{
+ struct rrlp_assist_req ar;
+ void *pdus[64];
+ int len[64];
+ int i, rv;
+
+ char *test = "\x28\x00\x80\x10\x01\x32\x00\x19\x4F\x07\x15\x04";
+
+ rrlp_decode_assistance_request(&ar, test, 12);
+ printf("%08x %016llx\n", ar.req_elems, (long long unsigned) ar.eph_svs);
+
+ ar.req_elems = -1;
+ ar.eph_svs = -1LL;
+ rv = rrlp_gps_assist_pdus(gps, &ar, pdus, len, 64);
+ printf("%d\n", rv);
+ for (i=0; i<rv; i++) {
+ printf("%p %d\n", pdus[i], len[i]);
+ }
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ struct gps_assist_data gps;
+ int rv;
+
+ memset(&gps, 0x00, sizeof(gps));
+
+ rv = do_ubx_read(&gps, "data.ubx");
+
+ rv = do_rrlp(&gps);
+
+ return 0;
+}
+