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Fix issue #3: add a search index for the CSV callsign database.

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This commit is contained in:
Serge Vakulenko 2018-09-10 20:29:33 -07:00
parent 09188047c9
commit ae79587ff9
1 changed files with 57 additions and 4 deletions
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61
uv380.c
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@ -2401,6 +2401,58 @@ static int uv380_verify_config(radio_device_t *radio)
return 1;
}
//
// Build search index of callsign table.
// Callsigns are supposed to be sorted by id.
//
// Region 0x200003-0x204002 of configuration memory contains a search helper
// for the ContactsCSV table. The helper is organized as a list
// of pairs <idbase, index>:
// idbase - high bits 23:12 of DMR ID
// index - number in ContactsCSV table, starting from 1 (20 bits)
//
// For example:
// id[23:12]
// Ncontacts | index[19:0]
// vvvvvvvv //\ /||\\.
// 200000 00 40 00 5a d0 00 01 5a e0 10 00 5a f0 20 00 5b .@.Z...Z...Z. .[
// 200010 00 30 00 5b 10 40 00 ff ff ff ff ff ff ff ff ff .0.[.@..........
// 200020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
// *
// 204000 ff ff ff
//
static void build_callsign_index(uint8_t *mem, int nrecords)
{
uint8_t *p;
int index;
// Number of contacts.
mem[0] = nrecords >> 16;
mem[1] = nrecords >> 8;
mem[2] = nrecords;
// Callsign index starting from 1.
index = 1;
p = &mem[3];
for (;;) {
int id = GET_CALLSIGN(mem, index-1)->dmrid;
// Add index item.
*p++ = id >> 16;
*p++ = ((id >> 8) & 0xf0) | (index >> 16);
*p++ = index >> 8;
*p++ = index;
// Skip callsigns with the same id[23:12].
do {
index++;
if (index > nrecords)
return;
} while ((GET_CALLSIGN(mem, index-1)->dmrid >> 12) == (id >> 12));
}
}
//
// Write CSV file to contacts database.
//
@ -2462,10 +2514,11 @@ static void uv380_write_csv(radio_device_t *radio, FILE *csv)
}
fprintf(stderr, "Total %d contacts.\n", nrecords);
// Number of contacts.
mem[0] = nrecords >> 16;
mem[1] = nrecords >> 8;
mem[2] = nrecords;
build_callsign_index(mem, nrecords);
#if 0
print_hex(mem, 0x4003);
exit(0);
#endif
// Align to 1kbyte.
finish = CALLSIGN_START + (CALLSIGN_OFFSET + nrecords*120 + 1023) / 1024 * 1024;