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// Copyright (c) 2006, 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 "common/convert_UTF.h"
#include "processor/scoped_ptr.h"
#include "common/string_conversion.h"
namespace google_breakpad {
using std::string;
using std::vector;
void UTF8ToUTF16(const char *in, vector<u_int16_t> *out) {
size_t source_length = strlen(in);
const UTF8 *source_ptr = reinterpret_cast<const UTF8 *>(in);
const UTF8 *source_end_ptr = source_ptr + source_length;
// Erase the contents and zero fill to the expected size
out->empty();
out->insert(out->begin(), source_length, 0);
u_int16_t *target_ptr = &(*out)[0];
u_int16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(u_int16_t);
ConversionResult result = ConvertUTF8toUTF16(&source_ptr, source_end_ptr,
&target_ptr, target_end_ptr,
strictConversion);
// Resize to be the size of the # of converted characters + NULL
out->resize(result == conversionOK ? target_ptr - &(*out)[0] + 1: 0);
}
int UTF8ToUTF16Char(const char *in, int in_length, u_int16_t out[2]) {
const UTF8 *source_ptr = reinterpret_cast<const UTF8 *>(in);
const UTF8 *source_end_ptr = source_ptr + sizeof(char);
u_int16_t *target_ptr = out;
u_int16_t *target_end_ptr = target_ptr + 2 * sizeof(u_int16_t);
out[0] = out[1] = 0;
// Process one character at a time
while (1) {
ConversionResult result = ConvertUTF8toUTF16(&source_ptr, source_end_ptr,
&target_ptr, target_end_ptr,
strictConversion);
if (result == conversionOK)
return source_ptr - reinterpret_cast<const UTF8 *>(in);
// Add another character to the input stream and try again
source_ptr = reinterpret_cast<const UTF8 *>(in);
++source_end_ptr;
if (source_end_ptr > reinterpret_cast<const UTF8 *>(in) + in_length)
break;
}
return 0;
}
void UTF32ToUTF16(const wchar_t *in, vector<u_int16_t> *out) {
size_t source_length = wcslen(in);
const UTF32 *source_ptr = reinterpret_cast<const UTF32 *>(in);
const UTF32 *source_end_ptr = source_ptr + source_length;
// Erase the contents and zero fill to the expected size
out->empty();
out->insert(out->begin(), source_length, 0);
u_int16_t *target_ptr = &(*out)[0];
u_int16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(u_int16_t);
ConversionResult result = ConvertUTF32toUTF16(&source_ptr, source_end_ptr,
&target_ptr, target_end_ptr,
strictConversion);
// Resize to be the size of the # of converted characters + NULL
out->resize(result == conversionOK ? target_ptr - &(*out)[0] + 1: 0);
}
void UTF32ToUTF16Char(wchar_t in, u_int16_t out[2]) {
const UTF32 *source_ptr = reinterpret_cast<const UTF32 *>(&in);
const UTF32 *source_end_ptr = source_ptr + 1;
u_int16_t *target_ptr = out;
u_int16_t *target_end_ptr = target_ptr + 2 * sizeof(u_int16_t);
out[0] = out[1] = 0;
ConversionResult result = ConvertUTF32toUTF16(&source_ptr, source_end_ptr,
&target_ptr, target_end_ptr,
strictConversion);
if (result != conversionOK) {
out[0] = out[1] = 0;
}
}
static inline u_int16_t Swap(u_int16_t value) {
return (value >> 8) | (value << 8);
}
string UTF16ToUTF8(const vector<u_int16_t> &in, bool swap) {
const UTF16 *source_ptr = &in[0];
scoped_ptr<u_int16_t> source_buffer;
// If we're to swap, we need to make a local copy and swap each byte pair
if (swap) {
int idx = 0;
source_buffer.reset(new u_int16_t[in.size()]);
UTF16 *source_buffer_ptr = source_buffer.get();
for (vector<u_int16_t>::const_iterator it = in.begin();
it != in.end(); ++it, ++idx)
source_buffer_ptr[idx] = Swap(*it);
source_ptr = source_buffer.get();
}
// The maximum expansion would be 4x the size of the input string.
const UTF16 *source_end_ptr = source_ptr + in.size();
int target_capacity = in.size() * 4;
scoped_array<UTF8> target_buffer(new UTF8[target_capacity]);
UTF8 *target_ptr = target_buffer.get();
UTF8 *target_end_ptr = target_ptr + target_capacity;
ConversionResult result = ConvertUTF16toUTF8(&source_ptr, source_end_ptr,
&target_ptr, target_end_ptr,
strictConversion);
if (result == conversionOK) {
const char *targetPtr = reinterpret_cast<const char *>(target_buffer.get());
string result(targetPtr);
return result;
}
return "";
}
} // namespace google_breakpad
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