FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/ucs2_decode.c @ 431:579441d7dcd8

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doc/TIFFS-Overview: long-overdue update for the current state of FC
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 04 Nov 2018 02:00:03 +0000
parents 978571e23318
children 1c599681fd60
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1 /*
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2 * This library module implements the conversion of UCS2-encoded data
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3 * (typically received in SMS) into ASCII, ISO 8859-1 or UTF-8,
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4 * maintaining parallelism with the corresponding function for decoding
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5 * GSM7-encoded data.
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6 */
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7
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8 #include <sys/types.h>
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9
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10 ucs2_to_ascii_or_ext(inbuf, inlen, outbuf, outlenp, ascii_ext, newline_ok, errp)
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11 u_char *inbuf, *outbuf;
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12 unsigned inlen, *outlenp, *errp;
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13 {
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14 u_char *inp, *endp, *outp;
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15 unsigned errcnt = 0;
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16 unsigned uni;
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17
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18 inp = inbuf;
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19 endp = inbuf + (inlen & ~1);
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20 outp = outbuf;
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21 while (inp < endp) {
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22 uni = (inp[0] << 8) | inp[1];
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23 inp += 2;
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24 if (uni == '\r') {
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25 *outp++ = '\\';
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26 *outp++ = 'r';
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27 errcnt++;
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28 } else if (uni == '\n') {
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29 if (newline_ok)
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30 *outp++ = '\n';
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31 else {
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32 *outp++ = '\\';
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33 *outp++ = 'n';
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34 errcnt++;
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35 }
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36 } else if (!is_decoded_char_ok(uni, ascii_ext)) {
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37 *outp++ = '?';
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38 errcnt++;
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39 } else if (ascii_ext == 2)
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40 outp += emit_utf8_char(uni, outp);
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41 else
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42 *outp++ = uni;
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43 }
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44 *outp = '\0';
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45 if (outlenp)
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46 *outlenp = outp - outbuf;
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47 if (errp)
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48 *errp = errcnt;
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49 }