FreeCalypso > hg > sms-coding-utils
annotate libcoding/gsm7_encode.c @ 10:17dd30989c0b
sms-gen-tpdu: fix bug in GSM7 data source
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 05 Aug 2023 07:47:22 +0000 |
parents | 2d0082216916 |
children | e56bb9f09ff1 |
rev | line source |
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Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * This library module implements the function for encoding from ISO 8859-1 |
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3 * into the GSM 7-bit default alphabet (03.38 or 23.038). |
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Mychaela Falconia <falcon@freecalypso.org>
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4 */ |
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5 |
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6 #include <sys/types.h> |
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7 |
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8 extern u_char gsm7_encode_table[256]; |
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Mychaela Falconia <falcon@freecalypso.org>
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9 |
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10 latin1_to_gsm7(inbuf, outbuf, outmax, outlenp) |
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11 u_char *inbuf, *outbuf; |
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12 unsigned outmax, *outlenp; |
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Mychaela Falconia <falcon@freecalypso.org>
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13 { |
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14 u_char *ip = inbuf, *op = outbuf; |
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15 unsigned outcnt = 0, c, n; |
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Mychaela Falconia <falcon@freecalypso.org>
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16 |
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17 while (c = *ip++) { |
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18 c = gsm7_encode_table[c]; |
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19 if (c == 0xFF) |
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20 return(-1); |
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21 if (c & 0x80) |
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22 n = 2; |
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23 else |
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24 n = 1; |
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25 if (outcnt + n > outmax) |
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26 return(-2); |
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27 if (c & 0x80) { |
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28 *op++ = 0x1B; |
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29 *op++ = c & 0x7F; |
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30 } else |
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31 *op++ = c; |
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32 outcnt += n; |
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33 } |
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34 *outlenp = outcnt; |
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35 return(0); |
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36 } |