FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/number_encode.c @ 712:a167d7b376b7

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fc-loadtool code: flprotreg.c factored out
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 05 Jun 2020 07:29:59 +0000
parents 7154a231e4b5
children
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7154a231e4b5 uptools/libcoding: SMS dest address parsing and encoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This library module implements the function that parses SMS destination
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3 * addresses given by the user and encodes them into the GSM 03.40
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4 * TP-Destination-Address structure.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <ctype.h>
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9 #include <stdlib.h>
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10
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11 digit_char_to_gsm(ch)
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12 {
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13 switch (ch) {
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14 case '0':
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15 case '1':
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16 case '2':
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17 case '3':
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18 case '4':
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19 case '5':
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20 case '6':
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21 case '7':
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22 case '8':
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23 case '9':
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24 return (ch - '0');
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25 case '*':
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26 return 0xA;
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27 case '#':
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28 return 0xB;
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29 case 'a':
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30 case 'b':
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31 case 'c':
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32 return (ch - 'a' + 0xC);
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33 case 'A':
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34 case 'B':
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35 case 'C':
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36 return (ch - 'A' + 0xC);
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37 }
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38 return (-1);
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39 }
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40
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41 parse_and_encode_dest_addr(input, outbuf)
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42 char *input;
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43 u_char *outbuf;
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44 {
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45 char *cp, *endp;
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46 int d;
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47 u_char digits[20];
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48 unsigned n;
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49
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50 cp = input;
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51 if (*cp == '+') {
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52 outbuf[1] = 0x91;
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53 cp++;
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54 } else
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55 outbuf[1] = 0x81;
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56 if (digit_char_to_gsm(*cp) < 0)
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57 return(-1);
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58 n = 0;
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59 while ((d = digit_char_to_gsm(*cp)) >= 0) {
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60 cp++;
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61 if (n >= 20)
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62 return(-1);
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63 digits[n++] = d;
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64 }
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65 outbuf[0] = n;
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66 while (n < 20)
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67 digits[n++] = 0xF;
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68 if (*cp == ',') {
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69 cp++;
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70 if (!isdigit(*cp))
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71 return(-1);
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72 outbuf[1] = strtoul(cp, &endp, 0);
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73 if (*endp)
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74 return(-1);
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75 } else if (*cp)
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76 return(-1);
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77 for (n = 0; n < 10; n++)
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78 outbuf[2+n] = (digits[n*2+1] << 4) | digits[n*2];
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79 return(0);
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80 }