FreeCalypso > hg > freecalypso-tools
annotate uptools/libcoding/ucs2_decode.c @ 926:6a0aa8d36d06
rvinterf backslash escape: introduce libprint
The new helper function library named libprint is meant to replace
the badly misnamed libg23, and will soon contain functions for
printing all of the same kinds of GPF TST packets that are now handled
in libg23. However, we are also moving safe_print_trace() from libasync
to this new library, and changing it to emit our new backslash escape
format.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 23 May 2023 03:47:46 +0000 |
parents | 30fbaa652ea5 |
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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 } |