FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/decode_helpers.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 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 outp[0] = 0xE0 | (uni >> 12);
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52 outp[1] = 0x80 | ((uni >> 6) & 0x3F);
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53 outp[2] = 0x80 | (uni & 0x3F);
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54 return(3);
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55 }