FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/utf8_decode2.c @ 921:74d284add54d

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fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +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
83c755829e31 uptools/libcoding: added function for turning UTF-8 into UCS-2
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6 #include <sys/types.h>
83c755829e31 uptools/libcoding: added function for turning UTF-8 into UCS-2
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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 }