FreeCalypso > hg > freecalypso-tools
annotate uptools/libcoding/number_decode.c @ 466:5bcf12be0834
ffstools/caltools: null pointer passing fixes
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 11 Feb 2019 05:50:45 +0000 |
parents | ea41b6001848 |
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rev | line source |
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uptools/libcoding: digit decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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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 } |