MtpProperty.cpp revision dde372033b4da75ebde7ea2afdec1c1b86ab5a42 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "MtpProperty"
18
19#include "MtpDataPacket.h"
20#include "MtpProperty.h"
21#include "MtpStringBuffer.h"
22#include "MtpUtils.h"
23
24namespace android {
25
26MtpProperty::MtpProperty()
27    :   mCode(0),
28        mType(0),
29        mWriteable(false),
30        mDefaultArrayLength(0),
31        mDefaultArrayValues(NULL),
32        mCurrentArrayLength(0),
33        mCurrentArrayValues(NULL),
34        mGroupCode(0),
35        mFormFlag(kFormNone),
36        mEnumLength(0),
37        mEnumValues(NULL)
38{
39    memset(&mDefaultValue, 0, sizeof(mDefaultValue));
40    memset(&mCurrentValue, 0, sizeof(mCurrentValue));
41    memset(&mMinimumValue, 0, sizeof(mMinimumValue));
42    memset(&mMaximumValue, 0, sizeof(mMaximumValue));
43}
44
45MtpProperty::MtpProperty(MtpPropertyCode propCode,
46                         MtpDataType type,
47                         bool writeable,
48                         int defaultValue)
49    :   mCode(propCode),
50        mType(type),
51        mWriteable(writeable),
52        mDefaultArrayLength(0),
53        mDefaultArrayValues(NULL),
54        mCurrentArrayLength(0),
55        mCurrentArrayValues(NULL),
56        mGroupCode(0),
57        mFormFlag(kFormNone),
58        mEnumLength(0),
59        mEnumValues(NULL)
60{
61    memset(&mDefaultValue, 0, sizeof(mDefaultValue));
62    memset(&mCurrentValue, 0, sizeof(mCurrentValue));
63    memset(&mMinimumValue, 0, sizeof(mMinimumValue));
64    memset(&mMaximumValue, 0, sizeof(mMaximumValue));
65
66    if (defaultValue) {
67        switch (type) {
68            case MTP_TYPE_INT8:
69                mDefaultValue.u.i8 = defaultValue;
70                break;
71            case MTP_TYPE_UINT8:
72                mDefaultValue.u.u8 = defaultValue;
73                break;
74            case MTP_TYPE_INT16:
75                mDefaultValue.u.i16 = defaultValue;
76                break;
77            case MTP_TYPE_UINT16:
78                mDefaultValue.u.u16 = defaultValue;
79                break;
80            case MTP_TYPE_INT32:
81                mDefaultValue.u.i32 = defaultValue;
82                break;
83            case MTP_TYPE_UINT32:
84                mDefaultValue.u.u32 = defaultValue;
85                break;
86            case MTP_TYPE_INT64:
87                mDefaultValue.u.i64 = defaultValue;
88                break;
89            case MTP_TYPE_UINT64:
90                mDefaultValue.u.u64 = defaultValue;
91                break;
92            default:
93                LOGE("unknown type %04X in MtpProperty::MtpProperty", type);
94        }
95    }
96}
97
98MtpProperty::~MtpProperty() {
99    if (mType == MTP_TYPE_STR) {
100        // free all strings
101        free(mDefaultValue.str);
102        free(mCurrentValue.str);
103        free(mMinimumValue.str);
104        free(mMaximumValue.str);
105        if (mDefaultArrayValues) {
106            for (int i = 0; i < mDefaultArrayLength; i++)
107                free(mDefaultArrayValues[i].str);
108        }
109        if (mCurrentArrayValues) {
110            for (int i = 0; i < mCurrentArrayLength; i++)
111                free(mCurrentArrayValues[i].str);
112        }
113        if (mEnumValues) {
114            for (int i = 0; i < mEnumLength; i++)
115                free(mEnumValues[i].str);
116        }
117    }
118    delete[] mDefaultArrayValues;
119    delete[] mCurrentArrayValues;
120    delete[] mEnumValues;
121}
122
123void MtpProperty::read(MtpDataPacket& packet) {
124    bool deviceProp = isDeviceProperty();
125
126    mCode = packet.getUInt16();
127    mType = packet.getUInt16();
128    mWriteable = (packet.getUInt8() == 1);
129    switch (mType) {
130        case MTP_TYPE_AINT8:
131        case MTP_TYPE_AUINT8:
132        case MTP_TYPE_AINT16:
133        case MTP_TYPE_AUINT16:
134        case MTP_TYPE_AINT32:
135        case MTP_TYPE_AUINT32:
136        case MTP_TYPE_AINT64:
137        case MTP_TYPE_AUINT64:
138        case MTP_TYPE_AINT128:
139        case MTP_TYPE_AUINT128:
140            mDefaultArrayValues = readArrayValues(packet, mDefaultArrayLength);
141            if (deviceProp)
142                mCurrentArrayValues = readArrayValues(packet, mCurrentArrayLength);
143            break;
144        default:
145            readValue(packet, mDefaultValue);
146            if (deviceProp)
147                readValue(packet, mCurrentValue);
148    }
149    if (!deviceProp)
150        mGroupCode = packet.getUInt32();
151    mFormFlag = packet.getUInt8();
152
153    if (mFormFlag == kFormRange) {
154            readValue(packet, mMinimumValue);
155            readValue(packet, mMaximumValue);
156            readValue(packet, mStepSize);
157    } else if (mFormFlag == kFormEnum) {
158        mEnumLength = packet.getUInt16();
159        mEnumValues = new MtpPropertyValue[mEnumLength];
160        for (int i = 0; i < mEnumLength; i++)
161            readValue(packet, mEnumValues[i]);
162    }
163}
164
165void MtpProperty::write(MtpDataPacket& packet) {
166    bool deviceProp = isDeviceProperty();
167
168    packet.putUInt16(mCode);
169    packet.putUInt16(mType);
170    packet.putUInt8(mWriteable ? 1 : 0);
171
172    switch (mType) {
173        case MTP_TYPE_AINT8:
174        case MTP_TYPE_AUINT8:
175        case MTP_TYPE_AINT16:
176        case MTP_TYPE_AUINT16:
177        case MTP_TYPE_AINT32:
178        case MTP_TYPE_AUINT32:
179        case MTP_TYPE_AINT64:
180        case MTP_TYPE_AUINT64:
181        case MTP_TYPE_AINT128:
182        case MTP_TYPE_AUINT128:
183            writeArrayValues(packet, mDefaultArrayValues, mDefaultArrayLength);
184            if (deviceProp)
185                writeArrayValues(packet, mCurrentArrayValues, mCurrentArrayLength);
186            break;
187        default:
188            writeValue(packet, mDefaultValue);
189            if (deviceProp)
190                writeValue(packet, mCurrentValue);
191    }
192    packet.putUInt32(mGroupCode);
193    if (!deviceProp)
194        packet.putUInt8(mFormFlag);
195    if (mFormFlag == kFormRange) {
196            writeValue(packet, mMinimumValue);
197            writeValue(packet, mMaximumValue);
198            writeValue(packet, mStepSize);
199    } else if (mFormFlag == kFormEnum) {
200        packet.putUInt16(mEnumLength);
201        for (int i = 0; i < mEnumLength; i++)
202            writeValue(packet, mEnumValues[i]);
203    }
204}
205
206void MtpProperty::setDefaultValue(const uint16_t* string) {
207    free(mDefaultValue.str);
208    if (string) {
209        MtpStringBuffer buffer(string);
210        mDefaultValue.str = strdup(buffer);
211    }
212    else
213        mDefaultValue.str = NULL;
214}
215
216void MtpProperty::setCurrentValue(const uint16_t* string) {
217    free(mCurrentValue.str);
218    if (string) {
219        MtpStringBuffer buffer(string);
220        mCurrentValue.str = strdup(buffer);
221    }
222    else
223        mCurrentValue.str = NULL;
224}
225
226void MtpProperty::print() {
227    LOGV("MtpProperty %04X\n", mCode);
228    LOGV("    type %04X\n", mType);
229    LOGV("    writeable %s\n", (mWriteable ? "true" : "false"));
230}
231
232void MtpProperty::readValue(MtpDataPacket& packet, MtpPropertyValue& value) {
233    MtpStringBuffer stringBuffer;
234
235    switch (mType) {
236        case MTP_TYPE_INT8:
237        case MTP_TYPE_AINT8:
238            value.u.i8 = packet.getInt8();
239            break;
240        case MTP_TYPE_UINT8:
241        case MTP_TYPE_AUINT8:
242            value.u.u8 = packet.getUInt8();
243            break;
244        case MTP_TYPE_INT16:
245        case MTP_TYPE_AINT16:
246            value.u.i16 = packet.getInt16();
247            break;
248        case MTP_TYPE_UINT16:
249        case MTP_TYPE_AUINT16:
250            value.u.u16 = packet.getUInt16();
251            break;
252        case MTP_TYPE_INT32:
253        case MTP_TYPE_AINT32:
254            value.u.i32 = packet.getInt32();
255            break;
256        case MTP_TYPE_UINT32:
257        case MTP_TYPE_AUINT32:
258            value.u.u32 = packet.getUInt32();
259            break;
260        case MTP_TYPE_INT64:
261        case MTP_TYPE_AINT64:
262            value.u.i64 = packet.getInt64();
263            break;
264        case MTP_TYPE_UINT64:
265        case MTP_TYPE_AUINT64:
266            value.u.u64 = packet.getUInt64();
267            break;
268        case MTP_TYPE_INT128:
269        case MTP_TYPE_AINT128:
270            packet.getInt128(value.u.i128);
271            break;
272        case MTP_TYPE_UINT128:
273        case MTP_TYPE_AUINT128:
274            packet.getUInt128(value.u.u128);
275            break;
276        case MTP_TYPE_STR:
277            packet.getString(stringBuffer);
278            value.str = strdup(stringBuffer);
279            break;
280        default:
281            LOGE("unknown type %04X in MtpProperty::readValue", mType);
282    }
283}
284
285void MtpProperty::writeValue(MtpDataPacket& packet, MtpPropertyValue& value) {
286    MtpStringBuffer stringBuffer;
287
288    switch (mType) {
289        case MTP_TYPE_INT8:
290        case MTP_TYPE_AINT8:
291            packet.putInt8(value.u.i8);
292            break;
293        case MTP_TYPE_UINT8:
294        case MTP_TYPE_AUINT8:
295            packet.putUInt8(value.u.u8);
296            break;
297        case MTP_TYPE_INT16:
298        case MTP_TYPE_AINT16:
299            packet.putInt16(value.u.i16);
300            break;
301        case MTP_TYPE_UINT16:
302        case MTP_TYPE_AUINT16:
303            packet.putUInt16(value.u.u16);
304            break;
305        case MTP_TYPE_INT32:
306        case MTP_TYPE_AINT32:
307            packet.putInt32(value.u.i32);
308            break;
309        case MTP_TYPE_UINT32:
310        case MTP_TYPE_AUINT32:
311            packet.putUInt32(value.u.u32);
312            break;
313        case MTP_TYPE_INT64:
314        case MTP_TYPE_AINT64:
315            packet.putInt64(value.u.i64);
316            break;
317        case MTP_TYPE_UINT64:
318        case MTP_TYPE_AUINT64:
319            packet.putUInt64(value.u.u64);
320            break;
321        case MTP_TYPE_INT128:
322        case MTP_TYPE_AINT128:
323            packet.putInt128(value.u.i128);
324            break;
325        case MTP_TYPE_UINT128:
326        case MTP_TYPE_AUINT128:
327            packet.putUInt128(value.u.u128);
328            break;
329        case MTP_TYPE_STR:
330            if (value.str)
331                packet.putString(value.str);
332            else
333                packet.putEmptyString();
334            break;
335        default:
336            LOGE("unknown type %04X in MtpProperty::writeValue", mType);
337    }
338}
339
340MtpPropertyValue* MtpProperty::readArrayValues(MtpDataPacket& packet, int& length) {
341    length = packet.getUInt32();
342    if (length == 0)
343        return NULL;
344    MtpPropertyValue* result = new MtpPropertyValue[length];
345    for (int i = 0; i < length; i++)
346        readValue(packet, result[i]);
347    return result;
348}
349
350void MtpProperty::writeArrayValues(MtpDataPacket& packet, MtpPropertyValue* values, int length) {
351    packet.putUInt32(length);
352    for (int i = 0; i < length; i++)
353        writeValue(packet, values[i]);
354}
355
356}  // namespace android
357