FreeCalypso > hg > sms-coding-utils

annotate libcoding/number_decode.c @ 28:6e925aa54727

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libcoding: more sensible naming of GSM time encoding and decoding modules
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 13 Jun 2024 02:32:11 +0000
parents 7418ca2e9949
children
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7418ca2e9949 libcoding: add functions from freecalypso-tools/uptools/libcoding
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1 /*
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2 * This library module implements the decoding of number (address) digits.
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3 */
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4
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5 #include <sys/types.h>
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6
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7 char gsm_address_digits[16] =
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8 {'0','1','2','3','4','5','6','7','8','9','*','#','a','b','c','?'};
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9
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10 decode_address_digits(inbuf, outbuf, ndigits)
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11 u_char *inbuf;
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12 char *outbuf;
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13 unsigned ndigits;
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14 {
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15 u_char *inp = inbuf;
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16 char *outp = outbuf;
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17 unsigned n = 0, b;
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18
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19 while (n < ndigits) {
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20 b = *inp++;
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21 *outp++ = gsm_address_digits[b & 0xF];
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22 n++;
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23 if (n >= ndigits)
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24 break;
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25 *outp++ = gsm_address_digits[b >> 4];
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26 n++;
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27 }
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28 *outp = '\0';
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29 }