FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/gsm7_decode.c @ 416:30f6d1c32c6f

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doc/Flash-boot-defect article removed (no longer relevant) This article is no longer relevant because the issue in question only affected one (1) defective FCDEV3B board which was not and never will be sold.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 26 Oct 2018 07:11:08 +0000
parents 978571e23318
children 1c599681fd60
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1 /*
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2 * This library module implements the decoding of GSM7-encoded data
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3 * into ASCII, ISO 8859-1 or UTF-8.
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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 extern u_short gsm7_decode_table[128];
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9 extern u_short gsm7ext_decode_table[128];
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10
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11 gsm7_to_ascii_or_ext(inbuf, inlen, outbuf, outlenp, ascii_ext, newline_ok, errp)
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12 u_char *inbuf, *outbuf;
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13 unsigned inlen, *outlenp, *errp;
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14 {
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15 u_char *inp, *endp, *outp;
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16 unsigned errcnt = 0;
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17 unsigned gsm, uni;
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18
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19 inp = inbuf;
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20 endp = inbuf + inlen;
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21 outp = outbuf;
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22 while (inp < endp) {
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23 gsm = *inp++;
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24 if (gsm == 0x1B && inp < endp)
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25 uni = gsm7ext_decode_table[*inp++];
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26 else
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27 uni = gsm7_decode_table[gsm];
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28 if (uni == '\r') {
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29 *outp++ = '\\';
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30 *outp++ = 'r';
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31 errcnt++;
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32 } else if (uni == '\n') {
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33 if (newline_ok)
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34 *outp++ = '\n';
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35 else {
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36 *outp++ = '\\';
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37 *outp++ = 'n';
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38 errcnt++;
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39 }
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40 } else if (!uni || !is_decoded_char_ok(uni, ascii_ext)) {
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41 *outp++ = '?';
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42 errcnt++;
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43 } else if (ascii_ext == 2)
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44 outp += emit_utf8_char(uni, outp);
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45 else
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46 *outp++ = uni;
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47 }
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48 *outp = '\0';
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49 if (outlenp)
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50 *outlenp = outp - outbuf;
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51 if (errp)
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52 *errp = errcnt;
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53 }