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comparison libnumdb/check_short.c @ 11:1d590563e64b

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libnumdb: implement short number lookup
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 26 Jun 2022 13:51:12 -0800
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10:960ffce6c542 11:1d590563e64b
1 /*
2 * The library function implemented in this module looks up 4-digit short
3 * dialing numbers in ThemWi number db to determine their disposition.
4 */
5
6 #include <stdio.h>
7 #include <stdint.h>
8 #include <stdlib.h>
9 #include "../include/number_db_file.h"
10
11 extern struct numdb_file_hdr numdb_hdr;
12 extern struct short_number_map *numdb_short_numbers;
13
14 static int
15 compare_short_num(p1, p2)
16 struct short_number_map *p1, *p2;
17 {
18 if (p1->short_code < p2->short_code)
19 return(-1);
20 else if (p1->short_code > p2->short_code)
21 return(1);
22 else
23 return(0);
24 }
25
26 lookup_short_dial_number(numstr, nanp_buf)
27 char *numstr, *nanp_buf;
28 {
29 struct short_number_map key, *res;
30
31 if (!numdb_short_numbers || !numdb_hdr.short_number_count)
32 return(0);
33 key.short_code = strtoul(numstr, 0, 10);
34 res = bsearch(&key, numdb_short_numbers, numdb_hdr.short_number_count,
35 sizeof(struct short_number_map), compare_short_num);
36 if (!res)
37 return(0);
38 if (res->prefix < 200000 || res->prefix > 999999) {
39 /* either ITN or an invalid record, also treated as an ITN */
40 nanp_buf[0] = '\0';
41 return(1);
42 }
43 sprintf(nanp_buf, "%06u%04u", res->prefix, res->short_code);
44 return(1);
45 }