FreeCalypso > hg > themwi-nanp

comparison libnumdb/check_nanp.c @ 1:6534965175dd

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
libnumdb ported over
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 13 Dec 2023 00:53:04 +0000
parents
children
comparison
equal deleted inserted replaced
0:159dd90eeafe 1:6534965175dd
1 /*
2 * The library function implemented in this module consults ThemWi number db
3 * to see if a given NANP number is owned by us or not.
4 */
5
6 #include <stdio.h>
7 #include <stdint.h>
8 #include <stdlib.h>
9
10 #include <themwi/nanp/number_db_v2.h>
11 #include <themwi/nanp/number_lookup.h>
12 #include <themwi/nanp/number_utils.h>
13
14 extern struct numdb_file_hdr numdb_hdr;
15 extern struct owned_number_rec *numdb_owned_numbers;
16
17 static int compare_owned_num(const void *p1v, const void *p2v)
18 {
19 const uint16_t *p1 = p1v, *p2 = p2v;
20
21 if (p1[0] < p2[0])
22 return(-1);
23 if (p1[0] > p2[0])
24 return(1);
25 if (p1[1] < p2[1])
26 return(-1);
27 if (p1[1] > p2[1])
28 return(1);
29 if (p1[2] < p2[2])
30 return(-1);
31 if (p1[2] > p2[2])
32 return(1);
33 return(0);
34 }
35
36 const struct owned_number_rec *numdb_lookup_nanp(const char *numstr)
37 {
38 uint16_t key[3];
39
40 if (!numdb_owned_numbers || !numdb_hdr.owned_number_count)
41 return(0);
42 key[0] = digits3_to_uint16(numstr);
43 key[1] = digits3_to_uint16(numstr + 3);
44 key[2] = digits4_to_uint16(numstr + 6);
45 return bsearch(key, numdb_owned_numbers, numdb_hdr.owned_number_count,
46 sizeof(struct owned_number_rec), compare_owned_num);
47 }