FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/gsm7_decode.c @ 619:f82551c77e58

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libserial-newlnx: ASYNC_LOW_LATENCY patch reverted Reports from Das Signal indicate that loadtools performance on Debian is about the same as on Slackware, and that including or omitting the ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the patch in question does not appear to be necessary, it is being reverted until and unless someone other than Serg reports an actual real-world system on which loadtools operation times are slowed compared to the Mother's Slackware reference and on which Slackware-like performance can be restored by setting the ASYNC_LOW_LATENCY flag.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 01:09:48 +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 }