FreeCalypso > hg > freecalypso-tools
annotate uptools/libcoding/ucs2_decode.c @ 884:8eb1f60f6676
ringtools/fc-pwt-comp.c: rm redundant type cast
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 03 Apr 2022 03:49:48 +0000 |
parents | 30fbaa652ea5 |
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rev | line source |
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1 /* |
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2 * This library module implements the conversion of UCS2-encoded data |
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3 * (typically received in SMS) into ASCII, ISO 8859-1 or UTF-8, |
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4 * maintaining parallelism with the corresponding function for decoding |
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5 * GSM7-encoded data. |
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6 */ |
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7 |
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8 #include <sys/types.h> |
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9 #include <stdio.h> |
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10 |
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11 ucs2_to_ascii_or_ext(inbuf, inlen, outbuf, outlenp, ascii_ext, newline_ok) |
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12 u_char *inbuf, *outbuf; |
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13 unsigned inlen, *outlenp; |
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14 { |
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15 u_char *inp, *endp, *outp; |
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16 unsigned uni; |
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17 |
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18 inp = inbuf; |
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19 endp = inbuf + (inlen & ~1); |
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20 outp = outbuf; |
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21 while (inp < endp) { |
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22 if ((endp - inp) >= 4 && (inp[0] & 0xFC) == 0xD8 && |
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23 (inp[2] & 0xFC) == 0xDC) { |
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24 uni = ((inp[0] & 3) << 18) | (inp[1] << 10) | |
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25 ((inp[2] & 3) << 8) | inp[3]; |
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26 inp += 4; |
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27 uni += 0x10000; |
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28 if (ascii_ext == 2) |
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29 outp += emit_utf8_char(uni, outp); |
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30 else { |
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31 sprintf(outp, "\\U%06X", uni); |
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32 outp += 8; |
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33 } |
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34 continue; |
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35 } |
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36 uni = (inp[0] << 8) | inp[1]; |
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37 inp += 2; |
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38 if (uni == '\\') { |
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39 *outp++ = '\\'; |
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40 *outp++ = '\\'; |
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41 } else if (uni == '\r') { |
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42 *outp++ = '\\'; |
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43 *outp++ = 'r'; |
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44 } else if (uni == '\n') { |
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45 if (newline_ok) |
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46 *outp++ = '\n'; |
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47 else { |
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48 *outp++ = '\\'; |
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49 *outp++ = 'n'; |
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50 } |
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51 } else if (!is_decoded_char_ok(uni, ascii_ext)) { |
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52 sprintf(outp, "\\u%04X", uni); |
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53 outp += 6; |
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54 } else if (ascii_ext == 2) |
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55 outp += emit_utf8_char(uni, outp); |
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56 else |
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57 *outp++ = uni; |
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58 } |
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59 *outp = '\0'; |
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60 if (outlenp) |
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61 *outlenp = outp - outbuf; |
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62 } |