FreeCalypso > hg > themwi-system-sw
annotate libutil/numstring.c @ 176:f5c4f9a764be
osmo-bts-rtp-bfi.patch: updated version
This version of the osmo-bts patch sets the TAF bit correctly
in generated RTP BFI packets, correctly generates RTP BFI in the
case of FACCH stealing on sysmoBTS, and removes one EFR-specific
bogon from sysmoBTS code.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 17 Feb 2023 18:27:03 -0800 |
parents | d712d518059e |
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rev | line source |
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libutil: add functions for number string parsing/preening
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1 /* |
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2 * Utility functions for number string initial parsing or preening. |
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3 * grok_number_string() checks whether or not a user-supplied string |
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4 * argument is fully numeric (with possibility of allowing hyphens), |
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5 * and returns the number of digits. dehyphen_number_string() copies |
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6 * a possibly-hyphenated number string to a new buffer with all hyphens |
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7 * taken out. |
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8 */ |
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9 |
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10 #include <ctype.h> |
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11 |
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12 grok_number_string(str, allow_hyphen) |
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13 char *str; |
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14 { |
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15 char *cp; |
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16 int c, n, last_hyphen; |
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17 |
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18 n = 0; |
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19 last_hyphen = 0; |
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20 for (cp = str; *cp; ) { |
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21 c = *cp++; |
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22 if (isdigit(c)) { |
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23 n++; |
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24 last_hyphen = 0; |
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25 } else if (c == '-') { |
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26 if (!allow_hyphen || !n || last_hyphen) |
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27 return(-1); |
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28 last_hyphen = 1; |
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29 } else |
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30 return(-1); |
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31 } |
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32 if (last_hyphen) |
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33 return(-1); |
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34 return n; |
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35 } |
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36 |
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37 dehyphen_number_string(src, dest) |
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38 char *src, *dest; |
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39 { |
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40 char *cp, *dp; |
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41 int c; |
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42 |
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43 dp = dest; |
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44 for (cp = src; *cp; ) { |
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45 c = *cp++; |
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46 if (isdigit(c)) |
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47 *dp++ = c; |
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48 } |
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49 *dp = '\0'; |
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50 } |