FreeCalypso > hg > freecalypso-tools
annotate uptools/libcoding/decode_helpers.c @ 799:f023a1c187a9
uptools/libcoding: import print_gsm7_string_to_file()
function from fc-sim-tools
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 25 Mar 2021 01:26:28 +0000 |
parents | 978571e23318 |
children | 1c599681fd60 |
rev | line source |
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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 } |