| // Copyright 2010-2014, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "base/text_converter.h" |
| |
| #include <cstring> |
| #include <string> |
| #include "base/string_piece.h" |
| #include "base/util.h" |
| |
| namespace mozc { |
| |
| namespace { |
| |
| int Lookup(const mozc::TextConverter::DoubleArray *array, |
| const char *key, int len, int *result) { |
| int32 seekto = 0; |
| int n = 0; |
| int b = array[0].base; |
| uint32 p = 0; |
| *result = -1; |
| uint32 num = 0; |
| |
| for (int i = 0; i < len; ++i) { |
| p = b; |
| n = array[p].base; |
| if (static_cast<uint32>(b) == array[p].check && n < 0) { |
| seekto = i; |
| *result = - n - 1; |
| ++num; |
| } |
| p = b + static_cast<uint8>(key[i]) + 1; |
| if (static_cast<uint32 >(b) == array[p].check) { |
| b = array[p].base; |
| } else { |
| return seekto; |
| } |
| } |
| p = b; |
| n = array[p].base; |
| if (static_cast<uint32>(b) == array[p].check && n < 0) { |
| seekto = len; |
| *result = -n - 1; |
| } |
| |
| return seekto; |
| } |
| |
| } // namespace |
| |
| void TextConverter::Convert(const DoubleArray *da, |
| const char *ctable, |
| const StringPiece input, |
| string *output) { |
| output->clear(); |
| const char *begin = input.data(); |
| const char *const end = input.data() + input.size(); |
| while (begin < end) { |
| int result = 0; |
| size_t mblen = Lookup(da, begin, static_cast<int>(end - begin), &result); |
| if (mblen > 0) { |
| const char *p = &ctable[result]; |
| const size_t len = strlen(p); |
| output->append(p, len); |
| mblen -= static_cast<int32>(p[len + 1]); |
| begin += mblen; |
| } else { |
| mblen = Util::OneCharLen(begin); |
| output->append(begin, mblen); |
| begin += mblen; |
| } |
| } |
| } |
| |
| } // namespace mozc |