| /* stringlib: codec implementations */ |
| |
| #if !STRINGLIB_IS_UNICODE |
| # error "codecs.h is specific to Unicode" |
| #endif |
| |
| /* Mask to quickly check whether a C 'long' contains a |
| non-ASCII, UTF8-encoded char. */ |
| #if (SIZEOF_LONG == 8) |
| # define ASCII_CHAR_MASK 0x8080808080808080UL |
| #elif (SIZEOF_LONG == 4) |
| # define ASCII_CHAR_MASK 0x80808080UL |
| #else |
| # error C 'long' size should be either 4 or 8! |
| #endif |
| |
| /* 10xxxxxx */ |
| #define IS_CONTINUATION_BYTE(ch) ((ch) >= 0x80 && (ch) < 0xC0) |
| |
| Py_LOCAL_INLINE(Py_UCS4) |
| STRINGLIB(utf8_decode)(const char **inptr, const char *end, |
| STRINGLIB_CHAR *dest, |
| Py_ssize_t *outpos) |
| { |
| Py_UCS4 ch; |
| const char *s = *inptr; |
| const char *aligned_end = (const char *) _Py_ALIGN_DOWN(end, SIZEOF_LONG); |
| STRINGLIB_CHAR *p = dest + *outpos; |
| |
| while (s < end) { |
| ch = (unsigned char)*s; |
| |
| if (ch < 0x80) { |
| /* Fast path for runs of ASCII characters. Given that common UTF-8 |
| input will consist of an overwhelming majority of ASCII |
| characters, we try to optimize for this case by checking |
| as many characters as a C 'long' can contain. |
| First, check if we can do an aligned read, as most CPUs have |
| a penalty for unaligned reads. |
| */ |
| if (_Py_IS_ALIGNED(s, SIZEOF_LONG)) { |
| /* Help register allocation */ |
| const char *_s = s; |
| STRINGLIB_CHAR *_p = p; |
| while (_s < aligned_end) { |
| /* Read a whole long at a time (either 4 or 8 bytes), |
| and do a fast unrolled copy if it only contains ASCII |
| characters. */ |
| unsigned long value = *(unsigned long *) _s; |
| if (value & ASCII_CHAR_MASK) |
| break; |
| #if PY_LITTLE_ENDIAN |
| _p[0] = (STRINGLIB_CHAR)(value & 0xFFu); |
| _p[1] = (STRINGLIB_CHAR)((value >> 8) & 0xFFu); |
| _p[2] = (STRINGLIB_CHAR)((value >> 16) & 0xFFu); |
| _p[3] = (STRINGLIB_CHAR)((value >> 24) & 0xFFu); |
| # if SIZEOF_LONG == 8 |
| _p[4] = (STRINGLIB_CHAR)((value >> 32) & 0xFFu); |
| _p[5] = (STRINGLIB_CHAR)((value >> 40) & 0xFFu); |
| _p[6] = (STRINGLIB_CHAR)((value >> 48) & 0xFFu); |
| _p[7] = (STRINGLIB_CHAR)((value >> 56) & 0xFFu); |
| # endif |
| #else |
| # if SIZEOF_LONG == 8 |
| _p[0] = (STRINGLIB_CHAR)((value >> 56) & 0xFFu); |
| _p[1] = (STRINGLIB_CHAR)((value >> 48) & 0xFFu); |
| _p[2] = (STRINGLIB_CHAR)((value >> 40) & 0xFFu); |
| _p[3] = (STRINGLIB_CHAR)((value >> 32) & 0xFFu); |
| _p[4] = (STRINGLIB_CHAR)((value >> 24) & 0xFFu); |
| _p[5] = (STRINGLIB_CHAR)((value >> 16) & 0xFFu); |
| _p[6] = (STRINGLIB_CHAR)((value >> 8) & 0xFFu); |
| _p[7] = (STRINGLIB_CHAR)(value & 0xFFu); |
| # else |
| _p[0] = (STRINGLIB_CHAR)((value >> 24) & 0xFFu); |
| _p[1] = (STRINGLIB_CHAR)((value >> 16) & 0xFFu); |
| _p[2] = (STRINGLIB_CHAR)((value >> 8) & 0xFFu); |
| _p[3] = (STRINGLIB_CHAR)(value & 0xFFu); |
| # endif |
| #endif |
| _s += SIZEOF_LONG; |
| _p += SIZEOF_LONG; |
| } |
| s = _s; |
| p = _p; |
| if (s == end) |
| break; |
| ch = (unsigned char)*s; |
| } |
| if (ch < 0x80) { |
| s++; |
| *p++ = ch; |
| continue; |
| } |
| } |
| |
| if (ch < 0xE0) { |
| /* \xC2\x80-\xDF\xBF -- 0080-07FF */ |
| Py_UCS4 ch2; |
| if (ch < 0xC2) { |
| /* invalid sequence |
| \x80-\xBF -- continuation byte |
| \xC0-\xC1 -- fake 0000-007F */ |
| goto InvalidStart; |
| } |
| if (end - s < 2) { |
| /* unexpected end of data: the caller will decide whether |
| it's an error or not */ |
| break; |
| } |
| ch2 = (unsigned char)s[1]; |
| if (!IS_CONTINUATION_BYTE(ch2)) |
| /* invalid continuation byte */ |
| goto InvalidContinuation1; |
| ch = (ch << 6) + ch2 - |
| ((0xC0 << 6) + 0x80); |
| assert ((ch > 0x007F) && (ch <= 0x07FF)); |
| s += 2; |
| if (STRINGLIB_MAX_CHAR <= 0x007F || |
| (STRINGLIB_MAX_CHAR < 0x07FF && ch > STRINGLIB_MAX_CHAR)) |
| /* Out-of-range */ |
| goto Return; |
| *p++ = ch; |
| continue; |
| } |
| |
| if (ch < 0xF0) { |
| /* \xE0\xA0\x80-\xEF\xBF\xBF -- 0800-FFFF */ |
| Py_UCS4 ch2, ch3; |
| if (end - s < 3) { |
| /* unexpected end of data: the caller will decide whether |
| it's an error or not */ |
| if (end - s < 2) |
| break; |
| ch2 = (unsigned char)s[1]; |
| if (!IS_CONTINUATION_BYTE(ch2) || |
| (ch2 < 0xA0 ? ch == 0xE0 : ch == 0xED)) |
| /* for clarification see comments below */ |
| goto InvalidContinuation1; |
| break; |
| } |
| ch2 = (unsigned char)s[1]; |
| ch3 = (unsigned char)s[2]; |
| if (!IS_CONTINUATION_BYTE(ch2)) { |
| /* invalid continuation byte */ |
| goto InvalidContinuation1; |
| } |
| if (ch == 0xE0) { |
| if (ch2 < 0xA0) |
| /* invalid sequence |
| \xE0\x80\x80-\xE0\x9F\xBF -- fake 0000-0800 */ |
| goto InvalidContinuation1; |
| } else if (ch == 0xED && ch2 >= 0xA0) { |
| /* Decoding UTF-8 sequences in range \xED\xA0\x80-\xED\xBF\xBF |
| will result in surrogates in range D800-DFFF. Surrogates are |
| not valid UTF-8 so they are rejected. |
| See http://www.unicode.org/versions/Unicode5.2.0/ch03.pdf |
| (table 3-7) and http://www.rfc-editor.org/rfc/rfc3629.txt */ |
| goto InvalidContinuation1; |
| } |
| if (!IS_CONTINUATION_BYTE(ch3)) { |
| /* invalid continuation byte */ |
| goto InvalidContinuation2; |
| } |
| ch = (ch << 12) + (ch2 << 6) + ch3 - |
| ((0xE0 << 12) + (0x80 << 6) + 0x80); |
| assert ((ch > 0x07FF) && (ch <= 0xFFFF)); |
| s += 3; |
| if (STRINGLIB_MAX_CHAR <= 0x07FF || |
| (STRINGLIB_MAX_CHAR < 0xFFFF && ch > STRINGLIB_MAX_CHAR)) |
| /* Out-of-range */ |
| goto Return; |
| *p++ = ch; |
| continue; |
| } |
| |
| if (ch < 0xF5) { |
| /* \xF0\x90\x80\x80-\xF4\x8F\xBF\xBF -- 10000-10FFFF */ |
| Py_UCS4 ch2, ch3, ch4; |
| if (end - s < 4) { |
| /* unexpected end of data: the caller will decide whether |
| it's an error or not */ |
| if (end - s < 2) |
| break; |
| ch2 = (unsigned char)s[1]; |
| if (!IS_CONTINUATION_BYTE(ch2) || |
| (ch2 < 0x90 ? ch == 0xF0 : ch == 0xF4)) |
| /* for clarification see comments below */ |
| goto InvalidContinuation1; |
| if (end - s < 3) |
| break; |
| ch3 = (unsigned char)s[2]; |
| if (!IS_CONTINUATION_BYTE(ch3)) |
| goto InvalidContinuation2; |
| break; |
| } |
| ch2 = (unsigned char)s[1]; |
| ch3 = (unsigned char)s[2]; |
| ch4 = (unsigned char)s[3]; |
| if (!IS_CONTINUATION_BYTE(ch2)) { |
| /* invalid continuation byte */ |
| goto InvalidContinuation1; |
| } |
| if (ch == 0xF0) { |
| if (ch2 < 0x90) |
| /* invalid sequence |
| \xF0\x80\x80\x80-\xF0\x8F\xBF\xBF -- fake 0000-FFFF */ |
| goto InvalidContinuation1; |
| } else if (ch == 0xF4 && ch2 >= 0x90) { |
| /* invalid sequence |
| \xF4\x90\x80\80- -- 110000- overflow */ |
| goto InvalidContinuation1; |
| } |
| if (!IS_CONTINUATION_BYTE(ch3)) { |
| /* invalid continuation byte */ |
| goto InvalidContinuation2; |
| } |
| if (!IS_CONTINUATION_BYTE(ch4)) { |
| /* invalid continuation byte */ |
| goto InvalidContinuation3; |
| } |
| ch = (ch << 18) + (ch2 << 12) + (ch3 << 6) + ch4 - |
| ((0xF0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80); |
| assert ((ch > 0xFFFF) && (ch <= 0x10FFFF)); |
| s += 4; |
| if (STRINGLIB_MAX_CHAR <= 0xFFFF || |
| (STRINGLIB_MAX_CHAR < 0x10FFFF && ch > STRINGLIB_MAX_CHAR)) |
| /* Out-of-range */ |
| goto Return; |
| *p++ = ch; |
| continue; |
| } |
| goto InvalidStart; |
| } |
| ch = 0; |
| Return: |
| *inptr = s; |
| *outpos = p - dest; |
| return ch; |
| InvalidStart: |
| ch = 1; |
| goto Return; |
| InvalidContinuation1: |
| ch = 2; |
| goto Return; |
| InvalidContinuation2: |
| ch = 3; |
| goto Return; |
| InvalidContinuation3: |
| ch = 4; |
| goto Return; |
| } |
| |
| #undef ASCII_CHAR_MASK |
| |
| |
| /* UTF-8 encoder specialized for a Unicode kind to avoid the slow |
| PyUnicode_READ() macro. Delete some parts of the code depending on the kind: |
| UCS-1 strings don't need to handle surrogates for example. */ |
| Py_LOCAL_INLINE(PyObject *) |
| STRINGLIB(utf8_encoder)(PyObject *unicode, |
| STRINGLIB_CHAR *data, |
| Py_ssize_t size, |
| const char *errors) |
| { |
| Py_ssize_t i; /* index into data of next input character */ |
| char *p; /* next free byte in output buffer */ |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| PyObject *error_handler_obj = NULL; |
| PyObject *exc = NULL; |
| PyObject *rep = NULL; |
| _Py_error_handler error_handler = _Py_ERROR_UNKNOWN; |
| #endif |
| #if STRINGLIB_SIZEOF_CHAR == 1 |
| const Py_ssize_t max_char_size = 2; |
| #elif STRINGLIB_SIZEOF_CHAR == 2 |
| const Py_ssize_t max_char_size = 3; |
| #else /* STRINGLIB_SIZEOF_CHAR == 4 */ |
| const Py_ssize_t max_char_size = 4; |
| #endif |
| _PyBytesWriter writer; |
| |
| assert(size >= 0); |
| _PyBytesWriter_Init(&writer); |
| |
| if (size > PY_SSIZE_T_MAX / max_char_size) { |
| /* integer overflow */ |
| return PyErr_NoMemory(); |
| } |
| |
| p = _PyBytesWriter_Alloc(&writer, size * max_char_size); |
| if (p == NULL) |
| return NULL; |
| |
| for (i = 0; i < size;) { |
| Py_UCS4 ch = data[i++]; |
| |
| if (ch < 0x80) { |
| /* Encode ASCII */ |
| *p++ = (char) ch; |
| |
| } |
| else |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| if (ch < 0x0800) |
| #endif |
| { |
| /* Encode Latin-1 */ |
| *p++ = (char)(0xc0 | (ch >> 6)); |
| *p++ = (char)(0x80 | (ch & 0x3f)); |
| } |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| else if (Py_UNICODE_IS_SURROGATE(ch)) { |
| Py_ssize_t startpos, endpos, newpos; |
| Py_ssize_t k; |
| if (error_handler == _Py_ERROR_UNKNOWN) { |
| error_handler = get_error_handler(errors); |
| } |
| |
| startpos = i-1; |
| endpos = startpos+1; |
| |
| while ((endpos < size) && Py_UNICODE_IS_SURROGATE(data[endpos])) |
| endpos++; |
| |
| /* Only overallocate the buffer if it's not the last write */ |
| writer.overallocate = (endpos < size); |
| |
| switch (error_handler) |
| { |
| case _Py_ERROR_REPLACE: |
| memset(p, '?', endpos - startpos); |
| p += (endpos - startpos); |
| /* fall through the ignore handler */ |
| case _Py_ERROR_IGNORE: |
| i += (endpos - startpos - 1); |
| break; |
| |
| case _Py_ERROR_SURROGATEPASS: |
| for (k=startpos; k<endpos; k++) { |
| ch = data[k]; |
| *p++ = (char)(0xe0 | (ch >> 12)); |
| *p++ = (char)(0x80 | ((ch >> 6) & 0x3f)); |
| *p++ = (char)(0x80 | (ch & 0x3f)); |
| } |
| i += (endpos - startpos - 1); |
| break; |
| |
| case _Py_ERROR_BACKSLASHREPLACE: |
| /* subtract preallocated bytes */ |
| writer.min_size -= max_char_size * (endpos - startpos); |
| p = backslashreplace(&writer, p, |
| unicode, startpos, endpos); |
| if (p == NULL) |
| goto error; |
| i += (endpos - startpos - 1); |
| break; |
| |
| case _Py_ERROR_XMLCHARREFREPLACE: |
| /* subtract preallocated bytes */ |
| writer.min_size -= max_char_size * (endpos - startpos); |
| p = xmlcharrefreplace(&writer, p, |
| unicode, startpos, endpos); |
| if (p == NULL) |
| goto error; |
| i += (endpos - startpos - 1); |
| break; |
| |
| case _Py_ERROR_SURROGATEESCAPE: |
| for (k=startpos; k<endpos; k++) { |
| ch = data[k]; |
| if (!(0xDC80 <= ch && ch <= 0xDCFF)) |
| break; |
| *p++ = (char)(ch & 0xff); |
| } |
| if (k >= endpos) { |
| i += (endpos - startpos - 1); |
| break; |
| } |
| startpos = k; |
| assert(startpos < endpos); |
| /* fall through the default handler */ |
| default: |
| rep = unicode_encode_call_errorhandler( |
| errors, &error_handler_obj, "utf-8", "surrogates not allowed", |
| unicode, &exc, startpos, endpos, &newpos); |
| if (!rep) |
| goto error; |
| |
| /* subtract preallocated bytes */ |
| writer.min_size -= max_char_size * (newpos - startpos); |
| |
| if (PyBytes_Check(rep)) { |
| p = _PyBytesWriter_WriteBytes(&writer, p, |
| PyBytes_AS_STRING(rep), |
| PyBytes_GET_SIZE(rep)); |
| } |
| else { |
| /* rep is unicode */ |
| if (PyUnicode_READY(rep) < 0) |
| goto error; |
| |
| if (!PyUnicode_IS_ASCII(rep)) { |
| raise_encode_exception(&exc, "utf-8", unicode, |
| startpos, endpos, |
| "surrogates not allowed"); |
| goto error; |
| } |
| |
| p = _PyBytesWriter_WriteBytes(&writer, p, |
| PyUnicode_DATA(rep), |
| PyUnicode_GET_LENGTH(rep)); |
| } |
| |
| if (p == NULL) |
| goto error; |
| Py_CLEAR(rep); |
| |
| i = newpos; |
| } |
| |
| /* If overallocation was disabled, ensure that it was the last |
| write. Otherwise, we missed an optimization */ |
| assert(writer.overallocate || i == size); |
| } |
| else |
| #if STRINGLIB_SIZEOF_CHAR > 2 |
| if (ch < 0x10000) |
| #endif |
| { |
| *p++ = (char)(0xe0 | (ch >> 12)); |
| *p++ = (char)(0x80 | ((ch >> 6) & 0x3f)); |
| *p++ = (char)(0x80 | (ch & 0x3f)); |
| } |
| #if STRINGLIB_SIZEOF_CHAR > 2 |
| else /* ch >= 0x10000 */ |
| { |
| assert(ch <= MAX_UNICODE); |
| /* Encode UCS4 Unicode ordinals */ |
| *p++ = (char)(0xf0 | (ch >> 18)); |
| *p++ = (char)(0x80 | ((ch >> 12) & 0x3f)); |
| *p++ = (char)(0x80 | ((ch >> 6) & 0x3f)); |
| *p++ = (char)(0x80 | (ch & 0x3f)); |
| } |
| #endif /* STRINGLIB_SIZEOF_CHAR > 2 */ |
| #endif /* STRINGLIB_SIZEOF_CHAR > 1 */ |
| } |
| |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| Py_XDECREF(error_handler_obj); |
| Py_XDECREF(exc); |
| #endif |
| return _PyBytesWriter_Finish(&writer, p); |
| |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| error: |
| Py_XDECREF(rep); |
| Py_XDECREF(error_handler_obj); |
| Py_XDECREF(exc); |
| _PyBytesWriter_Dealloc(&writer); |
| return NULL; |
| #endif |
| } |
| |
| /* The pattern for constructing UCS2-repeated masks. */ |
| #if SIZEOF_LONG == 8 |
| # define UCS2_REPEAT_MASK 0x0001000100010001ul |
| #elif SIZEOF_LONG == 4 |
| # define UCS2_REPEAT_MASK 0x00010001ul |
| #else |
| # error C 'long' size should be either 4 or 8! |
| #endif |
| |
| /* The mask for fast checking. */ |
| #if STRINGLIB_SIZEOF_CHAR == 1 |
| /* The mask for fast checking of whether a C 'long' contains a |
| non-ASCII or non-Latin1 UTF16-encoded characters. */ |
| # define FAST_CHAR_MASK (UCS2_REPEAT_MASK * (0xFFFFu & ~STRINGLIB_MAX_CHAR)) |
| #else |
| /* The mask for fast checking of whether a C 'long' may contain |
| UTF16-encoded surrogate characters. This is an efficient heuristic, |
| assuming that non-surrogate characters with a code point >= 0x8000 are |
| rare in most input. |
| */ |
| # define FAST_CHAR_MASK (UCS2_REPEAT_MASK * 0x8000u) |
| #endif |
| /* The mask for fast byte-swapping. */ |
| #define STRIPPED_MASK (UCS2_REPEAT_MASK * 0x00FFu) |
| /* Swap bytes. */ |
| #define SWAB(value) ((((value) >> 8) & STRIPPED_MASK) | \ |
| (((value) & STRIPPED_MASK) << 8)) |
| |
| Py_LOCAL_INLINE(Py_UCS4) |
| STRINGLIB(utf16_decode)(const unsigned char **inptr, const unsigned char *e, |
| STRINGLIB_CHAR *dest, Py_ssize_t *outpos, |
| int native_ordering) |
| { |
| Py_UCS4 ch; |
| const unsigned char *aligned_end = |
| (const unsigned char *) _Py_ALIGN_DOWN(e, SIZEOF_LONG); |
| const unsigned char *q = *inptr; |
| STRINGLIB_CHAR *p = dest + *outpos; |
| /* Offsets from q for retrieving byte pairs in the right order. */ |
| #if PY_LITTLE_ENDIAN |
| int ihi = !!native_ordering, ilo = !native_ordering; |
| #else |
| int ihi = !native_ordering, ilo = !!native_ordering; |
| #endif |
| --e; |
| |
| while (q < e) { |
| Py_UCS4 ch2; |
| /* First check for possible aligned read of a C 'long'. Unaligned |
| reads are more expensive, better to defer to another iteration. */ |
| if (_Py_IS_ALIGNED(q, SIZEOF_LONG)) { |
| /* Fast path for runs of in-range non-surrogate chars. */ |
| const unsigned char *_q = q; |
| while (_q < aligned_end) { |
| unsigned long block = * (unsigned long *) _q; |
| if (native_ordering) { |
| /* Can use buffer directly */ |
| if (block & FAST_CHAR_MASK) |
| break; |
| } |
| else { |
| /* Need to byte-swap */ |
| if (block & SWAB(FAST_CHAR_MASK)) |
| break; |
| #if STRINGLIB_SIZEOF_CHAR == 1 |
| block >>= 8; |
| #else |
| block = SWAB(block); |
| #endif |
| } |
| #if PY_LITTLE_ENDIAN |
| # if SIZEOF_LONG == 4 |
| p[0] = (STRINGLIB_CHAR)(block & 0xFFFFu); |
| p[1] = (STRINGLIB_CHAR)(block >> 16); |
| # elif SIZEOF_LONG == 8 |
| p[0] = (STRINGLIB_CHAR)(block & 0xFFFFu); |
| p[1] = (STRINGLIB_CHAR)((block >> 16) & 0xFFFFu); |
| p[2] = (STRINGLIB_CHAR)((block >> 32) & 0xFFFFu); |
| p[3] = (STRINGLIB_CHAR)(block >> 48); |
| # endif |
| #else |
| # if SIZEOF_LONG == 4 |
| p[0] = (STRINGLIB_CHAR)(block >> 16); |
| p[1] = (STRINGLIB_CHAR)(block & 0xFFFFu); |
| # elif SIZEOF_LONG == 8 |
| p[0] = (STRINGLIB_CHAR)(block >> 48); |
| p[1] = (STRINGLIB_CHAR)((block >> 32) & 0xFFFFu); |
| p[2] = (STRINGLIB_CHAR)((block >> 16) & 0xFFFFu); |
| p[3] = (STRINGLIB_CHAR)(block & 0xFFFFu); |
| # endif |
| #endif |
| _q += SIZEOF_LONG; |
| p += SIZEOF_LONG / 2; |
| } |
| q = _q; |
| if (q >= e) |
| break; |
| } |
| |
| ch = (q[ihi] << 8) | q[ilo]; |
| q += 2; |
| if (!Py_UNICODE_IS_SURROGATE(ch)) { |
| #if STRINGLIB_SIZEOF_CHAR < 2 |
| if (ch > STRINGLIB_MAX_CHAR) |
| /* Out-of-range */ |
| goto Return; |
| #endif |
| *p++ = (STRINGLIB_CHAR)ch; |
| continue; |
| } |
| |
| /* UTF-16 code pair: */ |
| if (q >= e) |
| goto UnexpectedEnd; |
| if (!Py_UNICODE_IS_HIGH_SURROGATE(ch)) |
| goto IllegalEncoding; |
| ch2 = (q[ihi] << 8) | q[ilo]; |
| q += 2; |
| if (!Py_UNICODE_IS_LOW_SURROGATE(ch2)) |
| goto IllegalSurrogate; |
| ch = Py_UNICODE_JOIN_SURROGATES(ch, ch2); |
| #if STRINGLIB_SIZEOF_CHAR < 4 |
| /* Out-of-range */ |
| goto Return; |
| #else |
| *p++ = (STRINGLIB_CHAR)ch; |
| #endif |
| } |
| ch = 0; |
| Return: |
| *inptr = q; |
| *outpos = p - dest; |
| return ch; |
| UnexpectedEnd: |
| ch = 1; |
| goto Return; |
| IllegalEncoding: |
| ch = 2; |
| goto Return; |
| IllegalSurrogate: |
| ch = 3; |
| goto Return; |
| } |
| #undef UCS2_REPEAT_MASK |
| #undef FAST_CHAR_MASK |
| #undef STRIPPED_MASK |
| #undef SWAB |
| |
| |
| #if STRINGLIB_MAX_CHAR >= 0x80 |
| Py_LOCAL_INLINE(Py_ssize_t) |
| STRINGLIB(utf16_encode)(const STRINGLIB_CHAR *in, |
| Py_ssize_t len, |
| unsigned short **outptr, |
| int native_ordering) |
| { |
| unsigned short *out = *outptr; |
| const STRINGLIB_CHAR *end = in + len; |
| #if STRINGLIB_SIZEOF_CHAR == 1 |
| if (native_ordering) { |
| const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4); |
| while (in < unrolled_end) { |
| out[0] = in[0]; |
| out[1] = in[1]; |
| out[2] = in[2]; |
| out[3] = in[3]; |
| in += 4; out += 4; |
| } |
| while (in < end) { |
| *out++ = *in++; |
| } |
| } else { |
| # define SWAB2(CH) ((CH) << 8) /* high byte is zero */ |
| const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4); |
| while (in < unrolled_end) { |
| out[0] = SWAB2(in[0]); |
| out[1] = SWAB2(in[1]); |
| out[2] = SWAB2(in[2]); |
| out[3] = SWAB2(in[3]); |
| in += 4; out += 4; |
| } |
| while (in < end) { |
| Py_UCS4 ch = *in++; |
| *out++ = SWAB2((Py_UCS2)ch); |
| } |
| #undef SWAB2 |
| } |
| *outptr = out; |
| return len; |
| #else |
| if (native_ordering) { |
| #if STRINGLIB_MAX_CHAR < 0x10000 |
| const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4); |
| while (in < unrolled_end) { |
| /* check if any character is a surrogate character */ |
| if (((in[0] ^ 0xd800) & |
| (in[1] ^ 0xd800) & |
| (in[2] ^ 0xd800) & |
| (in[3] ^ 0xd800) & 0xf800) == 0) |
| break; |
| out[0] = in[0]; |
| out[1] = in[1]; |
| out[2] = in[2]; |
| out[3] = in[3]; |
| in += 4; out += 4; |
| } |
| #endif |
| while (in < end) { |
| Py_UCS4 ch; |
| ch = *in++; |
| if (ch < 0xd800) |
| *out++ = ch; |
| else if (ch < 0xe000) |
| /* reject surrogate characters (U+D800-U+DFFF) */ |
| goto fail; |
| #if STRINGLIB_MAX_CHAR >= 0x10000 |
| else if (ch >= 0x10000) { |
| out[0] = Py_UNICODE_HIGH_SURROGATE(ch); |
| out[1] = Py_UNICODE_LOW_SURROGATE(ch); |
| out += 2; |
| } |
| #endif |
| else |
| *out++ = ch; |
| } |
| } else { |
| #define SWAB2(CH) (((CH) << 8) | ((CH) >> 8)) |
| #if STRINGLIB_MAX_CHAR < 0x10000 |
| const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4); |
| while (in < unrolled_end) { |
| /* check if any character is a surrogate character */ |
| if (((in[0] ^ 0xd800) & |
| (in[1] ^ 0xd800) & |
| (in[2] ^ 0xd800) & |
| (in[3] ^ 0xd800) & 0xf800) == 0) |
| break; |
| out[0] = SWAB2(in[0]); |
| out[1] = SWAB2(in[1]); |
| out[2] = SWAB2(in[2]); |
| out[3] = SWAB2(in[3]); |
| in += 4; out += 4; |
| } |
| #endif |
| while (in < end) { |
| Py_UCS4 ch = *in++; |
| if (ch < 0xd800) |
| *out++ = SWAB2((Py_UCS2)ch); |
| else if (ch < 0xe000) |
| /* reject surrogate characters (U+D800-U+DFFF) */ |
| goto fail; |
| #if STRINGLIB_MAX_CHAR >= 0x10000 |
| else if (ch >= 0x10000) { |
| Py_UCS2 ch1 = Py_UNICODE_HIGH_SURROGATE(ch); |
| Py_UCS2 ch2 = Py_UNICODE_LOW_SURROGATE(ch); |
| out[0] = SWAB2(ch1); |
| out[1] = SWAB2(ch2); |
| out += 2; |
| } |
| #endif |
| else |
| *out++ = SWAB2((Py_UCS2)ch); |
| } |
| #undef SWAB2 |
| } |
| *outptr = out; |
| return len; |
| fail: |
| *outptr = out; |
| return len - (end - in + 1); |
| #endif |
| } |
| |
| #if STRINGLIB_SIZEOF_CHAR == 1 |
| # define SWAB4(CH, tmp) ((CH) << 24) /* high bytes are zero */ |
| #elif STRINGLIB_SIZEOF_CHAR == 2 |
| # define SWAB4(CH, tmp) (tmp = (CH), \ |
| ((tmp & 0x00FFu) << 24) + ((tmp & 0xFF00u) << 8)) |
| /* high bytes are zero */ |
| #else |
| # define SWAB4(CH, tmp) (tmp = (CH), \ |
| tmp = ((tmp & 0x00FF00FFu) << 8) + ((tmp >> 8) & 0x00FF00FFu), \ |
| ((tmp & 0x0000FFFFu) << 16) + ((tmp >> 16) & 0x0000FFFFu)) |
| #endif |
| Py_LOCAL_INLINE(Py_ssize_t) |
| STRINGLIB(utf32_encode)(const STRINGLIB_CHAR *in, |
| Py_ssize_t len, |
| PY_UINT32_T **outptr, |
| int native_ordering) |
| { |
| PY_UINT32_T *out = *outptr; |
| const STRINGLIB_CHAR *end = in + len; |
| if (native_ordering) { |
| const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4); |
| while (in < unrolled_end) { |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| /* check if any character is a surrogate character */ |
| if (((in[0] ^ 0xd800) & |
| (in[1] ^ 0xd800) & |
| (in[2] ^ 0xd800) & |
| (in[3] ^ 0xd800) & 0xf800) == 0) |
| break; |
| #endif |
| out[0] = in[0]; |
| out[1] = in[1]; |
| out[2] = in[2]; |
| out[3] = in[3]; |
| in += 4; out += 4; |
| } |
| while (in < end) { |
| Py_UCS4 ch; |
| ch = *in++; |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| if (Py_UNICODE_IS_SURROGATE(ch)) { |
| /* reject surrogate characters (U+D800-U+DFFF) */ |
| goto fail; |
| } |
| #endif |
| *out++ = ch; |
| } |
| } else { |
| const STRINGLIB_CHAR *unrolled_end = in + _Py_SIZE_ROUND_DOWN(len, 4); |
| while (in < unrolled_end) { |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| Py_UCS4 ch1, ch2, ch3, ch4; |
| /* check if any character is a surrogate character */ |
| if (((in[0] ^ 0xd800) & |
| (in[1] ^ 0xd800) & |
| (in[2] ^ 0xd800) & |
| (in[3] ^ 0xd800) & 0xf800) == 0) |
| break; |
| #endif |
| out[0] = SWAB4(in[0], ch1); |
| out[1] = SWAB4(in[1], ch2); |
| out[2] = SWAB4(in[2], ch3); |
| out[3] = SWAB4(in[3], ch4); |
| in += 4; out += 4; |
| } |
| while (in < end) { |
| Py_UCS4 ch = *in++; |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| if (Py_UNICODE_IS_SURROGATE(ch)) { |
| /* reject surrogate characters (U+D800-U+DFFF) */ |
| goto fail; |
| } |
| #endif |
| *out++ = SWAB4(ch, ch); |
| } |
| } |
| *outptr = out; |
| return len; |
| #if STRINGLIB_SIZEOF_CHAR > 1 |
| fail: |
| *outptr = out; |
| return len - (end - in + 1); |
| #endif |
| } |
| #undef SWAB4 |
| |
| #endif |