FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/utf8_decode2.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents 83c755829e31
children 6bf473f77fc4
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83c755829e31 uptools/libcoding: added function for turning UTF-8 into UCS-2
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1 /*
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2 * This library module implements the function for converting UTF-8 input
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3 * to UCS-2 in outgoing SMS composition.
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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 utf8_to_ucs2(inbuf, outbuf, outmax, outlenp)
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9 u_char *inbuf;
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10 u_short *outbuf;
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11 unsigned outmax, *outlenp;
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12 {
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13 u_char *ip = inbuf;
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14 u_short *op = outbuf;
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15 unsigned outcnt = 0, c, n, uni;
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16
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17 while (c = *ip++) {
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18 if (c < 0x80) {
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19 uni = c;
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20 goto gotuni;
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21 }
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22 if (c < 0xC0 || c > 0xEF)
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23 return(-1);
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24 uni = c & 0x1F;
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25 if (c >= 0xE0)
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26 n = 2;
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27 else
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28 n = 1;
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29 for (; n; n--) {
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30 c = *ip++;
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31 if (c < 0x80 || c > 0xBF)
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32 return(-1);
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33 uni <<= 6;
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34 uni |= c & 0x3F;
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35 }
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36 gotuni: if (outcnt >= outmax)
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37 return(-2);
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38 *op++ = uni;
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39 outcnt++;
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40 }
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41 *outlenp = outcnt;
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42 return(0);
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43 }