FreeCalypso > hg > themwi-nanp

annotate libnumdb/check_short.c @ 2:1773886ef54e

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themwi-update-numdb: old source as starting point
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 13 Dec 2023 01:23:47 +0000
parents 6534965175dd
children
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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
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10 #include <themwi/nanp/number_db_v2.h>
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11 #include <themwi/nanp/number_lookup.h>
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12 #include <themwi/nanp/number_utils.h>
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13
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14 extern struct numdb_file_hdr numdb_hdr;
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15 extern struct short_number_rec *numdb_short_numbers;
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16
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17 static int compare_short_num(const void *p1v, const void *p2v)
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18 {
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19 const uint16_t *p1 = p1v, *p2 = p2v;
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20
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21 if (*p1 < *p2)
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22 return(-1);
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23 if (*p1 > *p2)
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24 return(1);
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25 return(0);
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26 }
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27
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28 const struct short_number_rec *numdb_lookup_short(const char *numstr)
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29 {
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30 uint16_t key;
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31
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32 if (!numdb_short_numbers || !numdb_hdr.short_number_count)
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33 return(0);
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34 key = digits4_to_uint16(numstr);
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35 return bsearch(&key, numdb_short_numbers, numdb_hdr.short_number_count,
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36 sizeof(struct short_number_rec), compare_short_num);
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37 }