155 lines
6.1 KiB
C++
155 lines
6.1 KiB
C++
// Copyright (c) 2006, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "common/convert_UTF.h"
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#include "processor/scoped_ptr.h"
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#include "common/string_conversion.h"
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#include <string.h>
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namespace google_breakpad {
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using std::string;
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using std::vector;
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void UTF8ToUTF16(const char *in, vector<u_int16_t> *out) {
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size_t source_length = strlen(in);
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const UTF8 *source_ptr = reinterpret_cast<const UTF8 *>(in);
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const UTF8 *source_end_ptr = source_ptr + source_length;
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// Erase the contents and zero fill to the expected size
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out->empty();
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out->insert(out->begin(), source_length, 0);
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u_int16_t *target_ptr = &(*out)[0];
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u_int16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(u_int16_t);
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ConversionResult result = ConvertUTF8toUTF16(&source_ptr, source_end_ptr,
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&target_ptr, target_end_ptr,
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strictConversion);
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// Resize to be the size of the # of converted characters + NULL
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out->resize(result == conversionOK ? target_ptr - &(*out)[0] + 1: 0);
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}
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int UTF8ToUTF16Char(const char *in, int in_length, u_int16_t out[2]) {
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const UTF8 *source_ptr = reinterpret_cast<const UTF8 *>(in);
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const UTF8 *source_end_ptr = source_ptr + sizeof(char);
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u_int16_t *target_ptr = out;
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u_int16_t *target_end_ptr = target_ptr + 2 * sizeof(u_int16_t);
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out[0] = out[1] = 0;
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// Process one character at a time
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while (1) {
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ConversionResult result = ConvertUTF8toUTF16(&source_ptr, source_end_ptr,
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&target_ptr, target_end_ptr,
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strictConversion);
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if (result == conversionOK)
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return static_cast<int>(source_ptr - reinterpret_cast<const UTF8 *>(in));
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// Add another character to the input stream and try again
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source_ptr = reinterpret_cast<const UTF8 *>(in);
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++source_end_ptr;
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if (source_end_ptr > reinterpret_cast<const UTF8 *>(in) + in_length)
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break;
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}
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return 0;
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}
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void UTF32ToUTF16(const wchar_t *in, vector<u_int16_t> *out) {
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size_t source_length = wcslen(in);
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const UTF32 *source_ptr = reinterpret_cast<const UTF32 *>(in);
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const UTF32 *source_end_ptr = source_ptr + source_length;
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// Erase the contents and zero fill to the expected size
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out->empty();
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out->insert(out->begin(), source_length, 0);
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u_int16_t *target_ptr = &(*out)[0];
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u_int16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(u_int16_t);
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ConversionResult result = ConvertUTF32toUTF16(&source_ptr, source_end_ptr,
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&target_ptr, target_end_ptr,
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strictConversion);
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// Resize to be the size of the # of converted characters + NULL
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out->resize(result == conversionOK ? target_ptr - &(*out)[0] + 1: 0);
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}
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void UTF32ToUTF16Char(wchar_t in, u_int16_t out[2]) {
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const UTF32 *source_ptr = reinterpret_cast<const UTF32 *>(&in);
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const UTF32 *source_end_ptr = source_ptr + 1;
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u_int16_t *target_ptr = out;
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u_int16_t *target_end_ptr = target_ptr + 2 * sizeof(u_int16_t);
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out[0] = out[1] = 0;
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ConversionResult result = ConvertUTF32toUTF16(&source_ptr, source_end_ptr,
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&target_ptr, target_end_ptr,
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strictConversion);
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if (result != conversionOK) {
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out[0] = out[1] = 0;
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}
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}
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static inline u_int16_t Swap(u_int16_t value) {
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return (value >> 8) | (value << 8);
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}
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string UTF16ToUTF8(const vector<u_int16_t> &in, bool swap) {
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const UTF16 *source_ptr = &in[0];
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scoped_ptr<u_int16_t> source_buffer;
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// If we're to swap, we need to make a local copy and swap each byte pair
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if (swap) {
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int idx = 0;
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source_buffer.reset(new u_int16_t[in.size()]);
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UTF16 *source_buffer_ptr = source_buffer.get();
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for (vector<u_int16_t>::const_iterator it = in.begin();
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it != in.end(); ++it, ++idx)
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source_buffer_ptr[idx] = Swap(*it);
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source_ptr = source_buffer.get();
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}
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// The maximum expansion would be 4x the size of the input string.
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const UTF16 *source_end_ptr = source_ptr + in.size();
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size_t target_capacity = in.size() * 4;
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scoped_array<UTF8> target_buffer(new UTF8[target_capacity]);
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UTF8 *target_ptr = target_buffer.get();
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UTF8 *target_end_ptr = target_ptr + target_capacity;
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ConversionResult result = ConvertUTF16toUTF8(&source_ptr, source_end_ptr,
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&target_ptr, target_end_ptr,
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strictConversion);
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if (result == conversionOK) {
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const char *targetPtr = reinterpret_cast<const char *>(target_buffer.get());
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return targetPtr;
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}
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return "";
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}
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} // namespace google_breakpad
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