Line data Source code
1 : // Copyright (c) 2006, Google Inc.
2 : // All rights reserved.
3 : //
4 : // Redistribution and use in source and binary forms, with or without
5 : // modification, are permitted provided that the following conditions are
6 : // met:
7 : //
8 : // * Redistributions of source code must retain the above copyright
9 : // notice, this list of conditions and the following disclaimer.
10 : // * Redistributions in binary form must reproduce the above
11 : // copyright notice, this list of conditions and the following disclaimer
12 : // in the documentation and/or other materials provided with the
13 : // distribution.
14 : // * Neither the name of Google Inc. nor the names of its
15 : // contributors may be used to endorse or promote products derived from
16 : // this software without specific prior written permission.
17 : //
18 : // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 : // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 : // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 : // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 : // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 : // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 : // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 : // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 : // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 : // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 : // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 :
30 : #include <string.h>
31 :
32 : #include "common/convert_UTF.h"
33 : #include "common/scoped_ptr.h"
34 : #include "common/string_conversion.h"
35 : #include "common/using_std_string.h"
36 :
37 : namespace google_breakpad {
38 :
39 : using std::vector;
40 :
41 0 : void UTF8ToUTF16(const char *in, vector<uint16_t> *out) {
42 0 : size_t source_length = strlen(in);
43 0 : const UTF8 *source_ptr = reinterpret_cast<const UTF8 *>(in);
44 0 : const UTF8 *source_end_ptr = source_ptr + source_length;
45 : // Erase the contents and zero fill to the expected size
46 0 : out->clear();
47 0 : out->insert(out->begin(), source_length, 0);
48 0 : uint16_t *target_ptr = &(*out)[0];
49 0 : uint16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(uint16_t);
50 : ConversionResult result = ConvertUTF8toUTF16(&source_ptr, source_end_ptr,
51 : &target_ptr, target_end_ptr,
52 0 : strictConversion);
53 :
54 : // Resize to be the size of the # of converted characters + NULL
55 0 : out->resize(result == conversionOK ? target_ptr - &(*out)[0] + 1: 0);
56 0 : }
57 :
58 0 : int UTF8ToUTF16Char(const char *in, int in_length, uint16_t out[2]) {
59 0 : const UTF8 *source_ptr = reinterpret_cast<const UTF8 *>(in);
60 0 : const UTF8 *source_end_ptr = source_ptr + sizeof(char);
61 0 : uint16_t *target_ptr = out;
62 0 : uint16_t *target_end_ptr = target_ptr + 2 * sizeof(uint16_t);
63 0 : out[0] = out[1] = 0;
64 :
65 : // Process one character at a time
66 : while (1) {
67 : ConversionResult result = ConvertUTF8toUTF16(&source_ptr, source_end_ptr,
68 : &target_ptr, target_end_ptr,
69 0 : strictConversion);
70 :
71 0 : if (result == conversionOK)
72 0 : return static_cast<int>(source_ptr - reinterpret_cast<const UTF8 *>(in));
73 :
74 : // Add another character to the input stream and try again
75 0 : source_ptr = reinterpret_cast<const UTF8 *>(in);
76 0 : ++source_end_ptr;
77 :
78 0 : if (source_end_ptr > reinterpret_cast<const UTF8 *>(in) + in_length)
79 0 : break;
80 0 : }
81 :
82 0 : return 0;
83 : }
84 :
85 0 : void UTF32ToUTF16(const wchar_t *in, vector<uint16_t> *out) {
86 0 : size_t source_length = wcslen(in);
87 0 : const UTF32 *source_ptr = reinterpret_cast<const UTF32 *>(in);
88 0 : const UTF32 *source_end_ptr = source_ptr + source_length;
89 : // Erase the contents and zero fill to the expected size
90 0 : out->clear();
91 0 : out->insert(out->begin(), source_length, 0);
92 0 : uint16_t *target_ptr = &(*out)[0];
93 0 : uint16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(uint16_t);
94 : ConversionResult result = ConvertUTF32toUTF16(&source_ptr, source_end_ptr,
95 : &target_ptr, target_end_ptr,
96 0 : strictConversion);
97 :
98 : // Resize to be the size of the # of converted characters + NULL
99 0 : out->resize(result == conversionOK ? target_ptr - &(*out)[0] + 1: 0);
100 0 : }
101 :
102 0 : void UTF32ToUTF16Char(wchar_t in, uint16_t out[2]) {
103 0 : const UTF32 *source_ptr = reinterpret_cast<const UTF32 *>(&in);
104 0 : const UTF32 *source_end_ptr = source_ptr + 1;
105 0 : uint16_t *target_ptr = out;
106 0 : uint16_t *target_end_ptr = target_ptr + 2 * sizeof(uint16_t);
107 0 : out[0] = out[1] = 0;
108 : ConversionResult result = ConvertUTF32toUTF16(&source_ptr, source_end_ptr,
109 : &target_ptr, target_end_ptr,
110 0 : strictConversion);
111 :
112 0 : if (result != conversionOK) {
113 0 : out[0] = out[1] = 0;
114 : }
115 0 : }
116 :
117 0 : static inline uint16_t Swap(uint16_t value) {
118 0 : return (value >> 8) | static_cast<uint16_t>(value << 8);
119 : }
120 :
121 0 : string UTF16ToUTF8(const vector<uint16_t> &in, bool swap) {
122 0 : const UTF16 *source_ptr = &in[0];
123 0 : scoped_array<uint16_t> source_buffer;
124 :
125 : // If we're to swap, we need to make a local copy and swap each byte pair
126 0 : if (swap) {
127 0 : int idx = 0;
128 0 : source_buffer.reset(new uint16_t[in.size()]);
129 0 : UTF16 *source_buffer_ptr = source_buffer.get();
130 0 : for (vector<uint16_t>::const_iterator it = in.begin();
131 0 : it != in.end(); ++it, ++idx)
132 0 : source_buffer_ptr[idx] = Swap(*it);
133 :
134 0 : source_ptr = source_buffer.get();
135 : }
136 :
137 : // The maximum expansion would be 4x the size of the input string.
138 0 : const UTF16 *source_end_ptr = source_ptr + in.size();
139 0 : size_t target_capacity = in.size() * 4;
140 0 : scoped_array<UTF8> target_buffer(new UTF8[target_capacity]);
141 0 : UTF8 *target_ptr = target_buffer.get();
142 0 : UTF8 *target_end_ptr = target_ptr + target_capacity;
143 : ConversionResult result = ConvertUTF16toUTF8(&source_ptr, source_end_ptr,
144 : &target_ptr, target_end_ptr,
145 0 : strictConversion);
146 :
147 0 : if (result == conversionOK) {
148 0 : const char *targetPtr = reinterpret_cast<const char *>(target_buffer.get());
149 0 : return targetPtr;
150 : }
151 :
152 0 : return "";
153 : }
154 :
155 : } // namespace google_breakpad
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