FreeCalypso > hg > themwi-system-sw
annotate libutil/imsi_entry.c @ 33:2b072ad13de6
top Makefile: add mgw
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 09 Jul 2022 22:52:44 -0800 |
parents | 40e5097437fa |
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rev | line source |
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libutil: add grok_imsi_user_arg()
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1 /* |
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2 * The library function implemented in this module supports IMSI entry |
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3 * at UI level, either in the standard form (long string of digits) |
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4 * or in the shorthand notation introduced in fc-sim-tools. |
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5 */ |
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6 |
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7 #include <ctype.h> |
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8 #include <string.h> |
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9 #include <strings.h> |
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10 |
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11 grok_imsi_user_arg(arg, dest) |
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12 char *arg, *dest; |
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13 { |
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14 char *cp, *dp; |
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15 int n, tail_len, remain; |
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16 |
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17 if (!isdigit(*arg)) |
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18 return(-1); |
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19 cp = arg; |
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20 dp = dest; |
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21 n = 0; |
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22 while (isdigit(*cp)) { |
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23 if (n >= 15) |
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24 return(-1); |
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25 *dp++ = *cp++; |
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26 n++; |
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27 } |
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28 if (!*cp) { |
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29 if (n < 6) |
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30 return(-1); |
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31 *dp = '\0'; |
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32 return(0); |
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33 } |
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34 if (*cp != '-') |
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35 return(-1); |
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36 cp++; |
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37 tail_len = strlen(cp); |
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38 if (!tail_len) |
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39 return(-1); |
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40 remain = 15 - n; |
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41 if (remain < tail_len + 1) |
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42 return(-1); |
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43 while (remain > tail_len) { |
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44 *dp++ = '0'; |
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45 remain--; |
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46 } |
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47 while (*cp) { |
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48 if (!isdigit(*cp)) |
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49 return(-1); |
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50 *dp++ = *cp++; |
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51 } |
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52 *dp = '\0'; |
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53 return(0); |
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54 } |