FreeCalypso > hg > themwi-system-sw

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