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comparison libnumdb2/check_short.c @ 236:38cac1cbe010

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libnumdb2: port check_short.c
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 14 Aug 2023 14:16:07 -0800
parents libnumdb/check_short.c@1d590563e64b
children
comparison
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235:bd493b21f215 236:38cac1cbe010
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_v2.h"
10
11 extern struct numdb_file_hdr numdb_hdr;
12 extern struct short_number_rec *numdb_short_numbers;
13
14 static int
15 compare_short_num(p1, p2)
16 uint16_t *p1, *p2;
17 {
18 if (*p1 < *p2)
19 return(-1);
20 if (*p1 > *p2)
21 return(1);
22 return(0);
23 }
24
25 struct short_number_rec *
26 numdb_lookup_short(numstr)
27 char *numstr;
28 {
29 uint16_t key;
30
31 if (!numdb_short_numbers || !numdb_hdr.short_number_count)
32 return(0);
33 key = digits4_to_uint16(numstr);
34 return bsearch(&key, numdb_short_numbers, numdb_hdr.short_number_count,
35 sizeof(struct short_number_rec), compare_short_num);
36 }