FreeCalypso > hg > themwi-system-sw

annotate libutil/digit_groups.c @ 242:f86ec96cea6f

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top Makefile: utils use libnumdb2 now
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 14 Aug 2023 15:44:33 -0800
parents 28441920fb35
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * In version 2 of ThemWi owned number database, NANP numbers are stored as 3
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Mychaela Falconia <falcon@freecalypso.org>
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3 * uint16_t words: NPA, exchange and prefix, each uint16_t encoding a group of
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Mychaela Falconia <falcon@freecalypso.org>
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4 * 3 or 4 digits of the full telephone number. This library module provides
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Mychaela Falconia <falcon@freecalypso.org>
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5 * functions for turning groups of 3 or 4 digits into uint16_t words.
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Mychaela Falconia <falcon@freecalypso.org>
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6 */
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7
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8 digits3_to_uint16(str)
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9 char *str;
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10 {
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11 int acc;
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12
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13 acc = (str[0] - '0') * 100;
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14 acc += (str[1] - '0') * 10;
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15 acc += str[2] - '0';
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16 return acc;
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Mychaela Falconia <falcon@freecalypso.org>
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17 }
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18
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19 digits4_to_uint16(str)
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20 char *str;
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Mychaela Falconia <falcon@freecalypso.org>
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21 {
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22 int acc;
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23
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24 acc = (str[0] - '0') * 1000;
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Mychaela Falconia <falcon@freecalypso.org>
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25 acc += (str[1] - '0') * 100;
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26 acc += (str[2] - '0') * 10;
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27 acc += str[3] - '0';
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Mychaela Falconia <falcon@freecalypso.org>
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28 return acc;
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29 }