FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/decode_helpers.c @ 995:74024eb17e04

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fc-loadtool help: improve language regarding 16 MiB flash chips In FC project history, 16 MiB flash originally meant Pirelli DP-L10. Then we got FCDEV3B with the same flash (our own design), but now we are discovering more Calypso devices that used such large flash, both late Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to migrate to more generic or neutral language in associated documentation, without giving elevated status to specific examples that drove our early project history.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 03 Dec 2023 21:11:12 +0000
parents 1c599681fd60
children
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1 /*
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2 * This library module implements the is_decoded_char_ok() and emit_utf8_char()
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3 * functions used by gsm7_to_ascii_or_ext() and ucs2_to_ascii_or_ext().
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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 is_decoded_char_ok(uni, ascii_ext)
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9 unsigned uni;
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10 {
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11 unsigned upper_limit;
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12
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13 /* weed out control chars first */
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14 if (uni < 0x20)
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15 return(0);
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16 if (uni >= 0x7F && uni <= 0x9F)
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17 return(0);
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18 /* see what range our output encoding allows */
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19 switch (ascii_ext) {
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20 case 0:
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21 upper_limit = 0x7F;
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22 break;
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23 case 1:
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24 upper_limit = 0xFF;
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25 break;
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26 case 2:
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27 upper_limit = 0xFFFF;
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28 break;
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29 default:
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30 upper_limit = 0;
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31 }
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32 if (uni <= upper_limit)
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33 return(1);
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34 else
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35 return(0);
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36 }
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37
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38 emit_utf8_char(uni, outp)
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39 unsigned uni;
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40 u_char *outp;
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41 {
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42 if (uni < 0x80) {
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43 *outp = uni;
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44 return(1);
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45 }
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46 if (uni < 0x800) {
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47 outp[0] = 0xC0 | (uni >> 6);
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48 outp[1] = 0x80 | (uni & 0x3F);
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49 return(2);
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50 }
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51 if (uni < 0x10000) {
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52 outp[0] = 0xE0 | (uni >> 12);
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53 outp[1] = 0x80 | ((uni >> 6) & 0x3F);
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54 outp[2] = 0x80 | (uni & 0x3F);
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55 return(3);
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56 }
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57 outp[0] = 0xF0 | (uni >> 18);
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58 outp[1] = 0x80 | ((uni >> 12) & 0x3F);
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59 outp[2] = 0x80 | ((uni >> 6) & 0x3F);
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60 outp[3] = 0x80 | (uni & 0x3F);
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61 return(4);
328
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62 }