FreeCalypso > hg > freecalypso-tools
view uptools/libcoding/ucs2_decode.c @ 837:724a6bc2a4b8
CHANGES: document tiaud-compile & tiaud-decomp extension
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 30 Jul 2021 01:37:42 +0000 |
parents | 30fbaa652ea5 |
children |
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/* * This library module implements the conversion of UCS2-encoded data * (typically received in SMS) into ASCII, ISO 8859-1 or UTF-8, * maintaining parallelism with the corresponding function for decoding * GSM7-encoded data. */ #include <sys/types.h> #include <stdio.h> ucs2_to_ascii_or_ext(inbuf, inlen, outbuf, outlenp, ascii_ext, newline_ok) u_char *inbuf, *outbuf; unsigned inlen, *outlenp; { u_char *inp, *endp, *outp; unsigned uni; inp = inbuf; endp = inbuf + (inlen & ~1); outp = outbuf; while (inp < endp) { if ((endp - inp) >= 4 && (inp[0] & 0xFC) == 0xD8 && (inp[2] & 0xFC) == 0xDC) { uni = ((inp[0] & 3) << 18) | (inp[1] << 10) | ((inp[2] & 3) << 8) | inp[3]; inp += 4; uni += 0x10000; if (ascii_ext == 2) outp += emit_utf8_char(uni, outp); else { sprintf(outp, "\\U%06X", uni); outp += 8; } continue; } uni = (inp[0] << 8) | inp[1]; inp += 2; if (uni == '\\') { *outp++ = '\\'; *outp++ = '\\'; } else if (uni == '\r') { *outp++ = '\\'; *outp++ = 'r'; } else if (uni == '\n') { if (newline_ok) *outp++ = '\n'; else { *outp++ = '\\'; *outp++ = 'n'; } } else if (!is_decoded_char_ok(uni, ascii_ext)) { sprintf(outp, "\\u%04X", uni); outp += 6; } else if (ascii_ext == 2) outp += emit_utf8_char(uni, outp); else *outp++ = uni; } *outp = '\0'; if (outlenp) *outlenp = outp - outbuf; }