1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/390223051): Remove C-library calls to fix the errors.
#pragma allow_unsafe_libc_calls
#endif
#include "ppapi/cpp/file_io.h"
#include <string.h> // memcpy
#include "ppapi/c/ppb_file_io.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/file_ref.h"
#include "ppapi/cpp/instance_handle.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/module_impl.h"
namespace pp {
namespace {
template <> const char* interface_name<PPB_FileIO_1_0>() {
return PPB_FILEIO_INTERFACE_1_0;
}
template <> const char* interface_name<PPB_FileIO_1_1>() {
return PPB_FILEIO_INTERFACE_1_1;
}
} // namespace
FileIO::FileIO() {}
FileIO::FileIO(const InstanceHandle& instance) {
if (has_interface<PPB_FileIO_1_1>()) {
PassRefFromConstructor(get_interface<PPB_FileIO_1_1>()->Create(
instance.pp_instance()));
} else if (has_interface<PPB_FileIO_1_0>()) {
PassRefFromConstructor(get_interface<PPB_FileIO_1_0>()->Create(
instance.pp_instance()));
}
}
FileIO::FileIO(const FileIO& other) : Resource(other) {}
FileIO& FileIO::operator=(const FileIO& other) {
Resource::operator=(other);
return *this;
}
int32_t FileIO::Open(const FileRef& file_ref,
int32_t open_flags,
const CompletionCallback& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
return get_interface<PPB_FileIO_1_1>()->Open(
pp_resource(), file_ref.pp_resource(), open_flags,
cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
return get_interface<PPB_FileIO_1_0>()->Open(
pp_resource(), file_ref.pp_resource(), open_flags,
cc.pp_completion_callback());
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
int32_t FileIO::Query(PP_FileInfo* result_buf,
const CompletionCallback& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
return get_interface<PPB_FileIO_1_1>()->Query(
pp_resource(), result_buf, cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
return get_interface<PPB_FileIO_1_0>()->Query(
pp_resource(), result_buf, cc.pp_completion_callback());
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
int32_t FileIO::Touch(PP_Time last_access_time,
PP_Time last_modified_time,
const CompletionCallback& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
return get_interface<PPB_FileIO_1_1>()->Touch(
pp_resource(), last_access_time, last_modified_time,
cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
return get_interface<PPB_FileIO_1_0>()->Touch(
pp_resource(), last_access_time, last_modified_time,
cc.pp_completion_callback());
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
int32_t FileIO::Read(int64_t offset,
char* buffer,
int32_t bytes_to_read,
const CompletionCallback& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
return get_interface<PPB_FileIO_1_1>()->Read(pp_resource(),
offset, buffer, bytes_to_read, cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
return get_interface<PPB_FileIO_1_0>()->Read(pp_resource(),
offset, buffer, bytes_to_read, cc.pp_completion_callback());
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
int32_t FileIO::Read(
int32_t offset,
int32_t max_read_length,
const CompletionCallbackWithOutput< std::vector<char> >& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
PP_ArrayOutput array_output = cc.output();
return get_interface<PPB_FileIO_1_1>()->ReadToArray(pp_resource(),
offset, max_read_length, &array_output,
cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
// Data for our callback wrapper. The callback handler will delete it and
// temp_buffer.
CallbackData1_0* data = new CallbackData1_0;
data->output = cc.output();
data->temp_buffer = max_read_length >= 0 ? new char[max_read_length] : NULL;
data->original_callback = cc.pp_completion_callback();
// Actual returned bytes might not equals to max_read_length. We need to
// read to a temporary buffer first and copy later to make sure the array
// buffer has correct size.
return get_interface<PPB_FileIO_1_0>()->Read(
pp_resource(), offset, data->temp_buffer, max_read_length,
PP_MakeCompletionCallback(&CallbackConverter, data));
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
int32_t FileIO::Write(int64_t offset,
const char* buffer,
int32_t bytes_to_write,
const CompletionCallback& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
return get_interface<PPB_FileIO_1_1>()->Write(
pp_resource(), offset, buffer, bytes_to_write,
cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
return get_interface<PPB_FileIO_1_0>()->Write(
pp_resource(), offset, buffer, bytes_to_write,
cc.pp_completion_callback());
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
int32_t FileIO::SetLength(int64_t length,
const CompletionCallback& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
return get_interface<PPB_FileIO_1_1>()->SetLength(
pp_resource(), length, cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
return get_interface<PPB_FileIO_1_0>()->SetLength(
pp_resource(), length, cc.pp_completion_callback());
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
int32_t FileIO::Flush(const CompletionCallback& cc) {
if (has_interface<PPB_FileIO_1_1>()) {
return get_interface<PPB_FileIO_1_1>()->Flush(
pp_resource(), cc.pp_completion_callback());
} else if (has_interface<PPB_FileIO_1_0>()) {
return get_interface<PPB_FileIO_1_0>()->Flush(
pp_resource(), cc.pp_completion_callback());
}
return cc.MayForce(PP_ERROR_NOINTERFACE);
}
void FileIO::Close() {
if (has_interface<PPB_FileIO_1_1>())
get_interface<PPB_FileIO_1_1>()->Close(pp_resource());
else if (has_interface<PPB_FileIO_1_0>())
get_interface<PPB_FileIO_1_0>()->Close(pp_resource());
}
// static
void FileIO::CallbackConverter(void* user_data, int32_t result) {
CallbackData1_0* data = static_cast<CallbackData1_0*>(user_data);
if (result >= 0) {
// Copy to the destination buffer owned by the callback.
char* buffer = static_cast<char*>(data->output.GetDataBuffer(
data->output.user_data, result, sizeof(char)));
memcpy(buffer, data->temp_buffer, result);
delete[] data->temp_buffer;
}
// Now execute the original callback.
PP_RunCompletionCallback(&data->original_callback, result);
delete data;
}
} // namespace pp
|
