pkasting@chromium.org | d23fe1a | 2011-04-01 05:34:25 +0900 | [diff] [blame] | 1 | // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 4 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 5 | #include "base/pickle.h" |
| 6 | |
maruel@google.com | 825f879 | 2008-08-07 05:35:17 +0900 | [diff] [blame] | 7 | #include <stdlib.h> |
| 8 | |
thestig@chromium.org | eb9afb4 | 2009-10-28 13:21:01 +0900 | [diff] [blame] | 9 | #include <algorithm> // for max() |
maruel@google.com | 825f879 | 2008-08-07 05:35:17 +0900 | [diff] [blame] | 10 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 11 | //------------------------------------------------------------------------------ |
| 12 | |
| 13 | // static |
| 14 | const int Pickle::kPayloadUnit = 64; |
| 15 | |
thestig@chromium.org | f0c8f44 | 2011-10-11 07:20:33 +0900 | [diff] [blame^] | 16 | static const size_t kCapacityReadOnly = static_cast<size_t>(-1); |
deanm@google.com | 19650de | 2008-08-13 23:57:51 +0900 | [diff] [blame] | 17 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 18 | // Payload is uint32 aligned. |
| 19 | |
| 20 | Pickle::Pickle() |
| 21 | : header_(NULL), |
| 22 | header_size_(sizeof(Header)), |
| 23 | capacity_(0), |
| 24 | variable_buffer_offset_(0) { |
| 25 | Resize(kPayloadUnit); |
| 26 | header_->payload_size = 0; |
| 27 | } |
| 28 | |
| 29 | Pickle::Pickle(int header_size) |
| 30 | : header_(NULL), |
| 31 | header_size_(AlignInt(header_size, sizeof(uint32))), |
| 32 | capacity_(0), |
| 33 | variable_buffer_offset_(0) { |
pkasting@chromium.org | d23fe1a | 2011-04-01 05:34:25 +0900 | [diff] [blame] | 34 | DCHECK_GE(static_cast<size_t>(header_size), sizeof(Header)); |
kushi.p@gmail.com | e486977 | 2011-04-22 22:13:07 +0900 | [diff] [blame] | 35 | DCHECK_LE(header_size, kPayloadUnit); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 36 | Resize(kPayloadUnit); |
| 37 | header_->payload_size = 0; |
| 38 | } |
| 39 | |
| 40 | Pickle::Pickle(const char* data, int data_len) |
| 41 | : header_(reinterpret_cast<Header*>(const_cast<char*>(data))), |
rvargas@google.com | 8d9b2b9 | 2010-11-16 04:31:23 +0900 | [diff] [blame] | 42 | header_size_(0), |
deanm@google.com | 19650de | 2008-08-13 23:57:51 +0900 | [diff] [blame] | 43 | capacity_(kCapacityReadOnly), |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 44 | variable_buffer_offset_(0) { |
rvargas@google.com | 8d9b2b9 | 2010-11-16 04:31:23 +0900 | [diff] [blame] | 45 | if (data_len >= static_cast<int>(sizeof(Header))) |
| 46 | header_size_ = data_len - header_->payload_size; |
| 47 | |
| 48 | if (header_size_ > static_cast<unsigned int>(data_len)) |
| 49 | header_size_ = 0; |
| 50 | |
| 51 | if (header_size_ != AlignInt(header_size_, sizeof(uint32))) |
| 52 | header_size_ = 0; |
| 53 | |
| 54 | // If there is anything wrong with the data, we're not going to use it. |
| 55 | if (!header_size_) |
| 56 | header_ = NULL; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | Pickle::Pickle(const Pickle& other) |
| 60 | : header_(NULL), |
| 61 | header_size_(other.header_size_), |
| 62 | capacity_(0), |
| 63 | variable_buffer_offset_(other.variable_buffer_offset_) { |
| 64 | size_t payload_size = header_size_ + other.header_->payload_size; |
| 65 | bool resized = Resize(payload_size); |
| 66 | CHECK(resized); // Realloc failed. |
| 67 | memcpy(header_, other.header_, payload_size); |
| 68 | } |
| 69 | |
| 70 | Pickle::~Pickle() { |
deanm@google.com | 19650de | 2008-08-13 23:57:51 +0900 | [diff] [blame] | 71 | if (capacity_ != kCapacityReadOnly) |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 72 | free(header_); |
| 73 | } |
| 74 | |
| 75 | Pickle& Pickle::operator=(const Pickle& other) { |
jar@chromium.org | 4e105f1 | 2009-08-08 08:13:35 +0900 | [diff] [blame] | 76 | if (this == &other) { |
| 77 | NOTREACHED(); |
| 78 | return *this; |
| 79 | } |
jar@chromium.org | 766c5a0 | 2009-08-03 16:01:47 +0900 | [diff] [blame] | 80 | if (capacity_ == kCapacityReadOnly) { |
| 81 | header_ = NULL; |
| 82 | capacity_ = 0; |
| 83 | } |
| 84 | if (header_size_ != other.header_size_) { |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 85 | free(header_); |
| 86 | header_ = NULL; |
| 87 | header_size_ = other.header_size_; |
| 88 | } |
jar@chromium.org | 4e105f1 | 2009-08-08 08:13:35 +0900 | [diff] [blame] | 89 | bool resized = Resize(other.header_size_ + other.header_->payload_size); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 90 | CHECK(resized); // Realloc failed. |
jar@chromium.org | 4e105f1 | 2009-08-08 08:13:35 +0900 | [diff] [blame] | 91 | memcpy(header_, other.header_, |
| 92 | other.header_size_ + other.header_->payload_size); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 93 | variable_buffer_offset_ = other.variable_buffer_offset_; |
| 94 | return *this; |
| 95 | } |
| 96 | |
| 97 | bool Pickle::ReadBool(void** iter, bool* result) const { |
| 98 | DCHECK(iter); |
| 99 | |
| 100 | int tmp; |
| 101 | if (!ReadInt(iter, &tmp)) |
| 102 | return false; |
| 103 | DCHECK(0 == tmp || 1 == tmp); |
| 104 | *result = tmp ? true : false; |
| 105 | return true; |
| 106 | } |
| 107 | |
| 108 | bool Pickle::ReadInt(void** iter, int* result) const { |
| 109 | DCHECK(iter); |
| 110 | if (!*iter) |
| 111 | *iter = const_cast<char*>(payload()); |
| 112 | |
| 113 | if (!IteratorHasRoomFor(*iter, sizeof(*result))) |
| 114 | return false; |
| 115 | |
maruel@chromium.org | b7f65c3 | 2009-06-02 05:26:42 +0900 | [diff] [blame] | 116 | // TODO(jar): http://crbug.com/13108 Pickle should be cleaned up, and not |
| 117 | // dependent on alignment. |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 118 | // Next line is otherwise the same as: memcpy(result, *iter, sizeof(*result)); |
| 119 | *result = *reinterpret_cast<int*>(*iter); |
| 120 | |
| 121 | UpdateIter(iter, sizeof(*result)); |
| 122 | return true; |
| 123 | } |
| 124 | |
klink@google.com | d7f6003 | 2008-08-23 08:24:54 +0900 | [diff] [blame] | 125 | bool Pickle::ReadLong(void** iter, long* result) const { |
| 126 | DCHECK(iter); |
| 127 | if (!*iter) |
| 128 | *iter = const_cast<char*>(payload()); |
| 129 | |
| 130 | if (!IteratorHasRoomFor(*iter, sizeof(*result))) |
| 131 | return false; |
| 132 | |
maruel@chromium.org | b7f65c3 | 2009-06-02 05:26:42 +0900 | [diff] [blame] | 133 | // TODO(jar): http://crbug.com/13108 Pickle should be cleaned up, and not |
| 134 | // dependent on alignment. |
klink@google.com | d7f6003 | 2008-08-23 08:24:54 +0900 | [diff] [blame] | 135 | memcpy(result, *iter, sizeof(*result)); |
| 136 | |
| 137 | UpdateIter(iter, sizeof(*result)); |
| 138 | return true; |
| 139 | } |
| 140 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 141 | bool Pickle::ReadSize(void** iter, size_t* result) const { |
| 142 | DCHECK(iter); |
| 143 | if (!*iter) |
| 144 | *iter = const_cast<char*>(payload()); |
| 145 | |
| 146 | if (!IteratorHasRoomFor(*iter, sizeof(*result))) |
| 147 | return false; |
| 148 | |
maruel@chromium.org | b7f65c3 | 2009-06-02 05:26:42 +0900 | [diff] [blame] | 149 | // TODO(jar): http://crbug.com/13108 Pickle should be cleaned up, and not |
| 150 | // dependent on alignment. |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 151 | // Next line is otherwise the same as: memcpy(result, *iter, sizeof(*result)); |
| 152 | *result = *reinterpret_cast<size_t*>(*iter); |
| 153 | |
| 154 | UpdateIter(iter, sizeof(*result)); |
| 155 | return true; |
| 156 | } |
| 157 | |
bryner@chromium.org | c85d0fd | 2011-02-23 04:47:19 +0900 | [diff] [blame] | 158 | bool Pickle::ReadUInt16(void** iter, uint16* result) const { |
| 159 | DCHECK(iter); |
| 160 | if (!*iter) |
| 161 | *iter = const_cast<char*>(payload()); |
| 162 | |
| 163 | if (!IteratorHasRoomFor(*iter, sizeof(*result))) |
| 164 | return false; |
| 165 | |
| 166 | memcpy(result, *iter, sizeof(*result)); |
| 167 | |
| 168 | UpdateIter(iter, sizeof(*result)); |
| 169 | return true; |
| 170 | } |
| 171 | |
jeremy@chromium.org | 62ace90 | 2008-12-30 03:55:18 +0900 | [diff] [blame] | 172 | bool Pickle::ReadUInt32(void** iter, uint32* result) const { |
| 173 | DCHECK(iter); |
| 174 | if (!*iter) |
| 175 | *iter = const_cast<char*>(payload()); |
| 176 | |
| 177 | if (!IteratorHasRoomFor(*iter, sizeof(*result))) |
| 178 | return false; |
| 179 | |
| 180 | memcpy(result, *iter, sizeof(*result)); |
| 181 | |
| 182 | UpdateIter(iter, sizeof(*result)); |
| 183 | return true; |
| 184 | } |
| 185 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 186 | bool Pickle::ReadInt64(void** iter, int64* result) const { |
| 187 | DCHECK(iter); |
| 188 | if (!*iter) |
| 189 | *iter = const_cast<char*>(payload()); |
| 190 | |
| 191 | if (!IteratorHasRoomFor(*iter, sizeof(*result))) |
| 192 | return false; |
| 193 | |
| 194 | memcpy(result, *iter, sizeof(*result)); |
| 195 | |
| 196 | UpdateIter(iter, sizeof(*result)); |
| 197 | return true; |
| 198 | } |
| 199 | |
thestig@chromium.org | eb9afb4 | 2009-10-28 13:21:01 +0900 | [diff] [blame] | 200 | bool Pickle::ReadUInt64(void** iter, uint64* result) const { |
| 201 | DCHECK(iter); |
| 202 | if (!*iter) |
| 203 | *iter = const_cast<char*>(payload()); |
| 204 | |
| 205 | if (!IteratorHasRoomFor(*iter, sizeof(*result))) |
| 206 | return false; |
| 207 | |
| 208 | memcpy(result, *iter, sizeof(*result)); |
| 209 | |
| 210 | UpdateIter(iter, sizeof(*result)); |
| 211 | return true; |
| 212 | } |
| 213 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 214 | bool Pickle::ReadString(void** iter, std::string* result) const { |
| 215 | DCHECK(iter); |
| 216 | |
| 217 | int len; |
| 218 | if (!ReadLength(iter, &len)) |
| 219 | return false; |
| 220 | if (!IteratorHasRoomFor(*iter, len)) |
| 221 | return false; |
| 222 | |
| 223 | char* chars = reinterpret_cast<char*>(*iter); |
| 224 | result->assign(chars, len); |
| 225 | |
| 226 | UpdateIter(iter, len); |
| 227 | return true; |
| 228 | } |
| 229 | |
| 230 | bool Pickle::ReadWString(void** iter, std::wstring* result) const { |
| 231 | DCHECK(iter); |
| 232 | |
| 233 | int len; |
| 234 | if (!ReadLength(iter, &len)) |
| 235 | return false; |
cevans@chromium.org | a834cdd | 2009-06-26 01:54:02 +0900 | [diff] [blame] | 236 | // Avoid integer overflow. |
| 237 | if (len > INT_MAX / static_cast<int>(sizeof(wchar_t))) |
| 238 | return false; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 239 | if (!IteratorHasRoomFor(*iter, len * sizeof(wchar_t))) |
| 240 | return false; |
| 241 | |
| 242 | wchar_t* chars = reinterpret_cast<wchar_t*>(*iter); |
| 243 | result->assign(chars, len); |
| 244 | |
| 245 | UpdateIter(iter, len * sizeof(wchar_t)); |
| 246 | return true; |
| 247 | } |
| 248 | |
estade@chromium.org | 38a18bf | 2009-03-04 12:36:36 +0900 | [diff] [blame] | 249 | bool Pickle::ReadString16(void** iter, string16* result) const { |
| 250 | DCHECK(iter); |
| 251 | |
| 252 | int len; |
| 253 | if (!ReadLength(iter, &len)) |
| 254 | return false; |
cevans@chromium.org | a834cdd | 2009-06-26 01:54:02 +0900 | [diff] [blame] | 255 | if (!IteratorHasRoomFor(*iter, len * sizeof(char16))) |
estade@chromium.org | 38a18bf | 2009-03-04 12:36:36 +0900 | [diff] [blame] | 256 | return false; |
| 257 | |
| 258 | char16* chars = reinterpret_cast<char16*>(*iter); |
| 259 | result->assign(chars, len); |
| 260 | |
| 261 | UpdateIter(iter, len * sizeof(char16)); |
| 262 | return true; |
| 263 | } |
| 264 | |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 265 | bool Pickle::ReadData(void** iter, const char** data, int* length) const { |
| 266 | DCHECK(iter); |
| 267 | DCHECK(data); |
| 268 | DCHECK(length); |
| 269 | *length = 0; |
| 270 | *data = 0; |
| 271 | |
| 272 | if (!ReadLength(iter, length)) |
| 273 | return false; |
| 274 | |
| 275 | return ReadBytes(iter, data, *length); |
| 276 | } |
| 277 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 278 | bool Pickle::ReadBytes(void** iter, const char** data, int length) const { |
| 279 | DCHECK(iter); |
| 280 | DCHECK(data); |
cevans@chromium.org | 7c65f02 | 2009-12-31 05:09:02 +0900 | [diff] [blame] | 281 | *data = 0; |
mpcomplete@chromium.org | 0409ecb | 2010-03-31 08:52:24 +0900 | [diff] [blame] | 282 | if (!*iter) |
| 283 | *iter = const_cast<char*>(payload()); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 284 | |
| 285 | if (!IteratorHasRoomFor(*iter, length)) |
| 286 | return false; |
| 287 | |
| 288 | *data = reinterpret_cast<const char*>(*iter); |
| 289 | |
| 290 | UpdateIter(iter, length); |
| 291 | return true; |
| 292 | } |
| 293 | |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 294 | bool Pickle::ReadLength(void** iter, int* result) const { |
| 295 | if (!ReadInt(iter, result)) |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 296 | return false; |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 297 | return ((*result) >= 0); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | bool Pickle::WriteString(const std::string& value) { |
| 301 | if (!WriteInt(static_cast<int>(value.size()))) |
| 302 | return false; |
| 303 | |
| 304 | return WriteBytes(value.data(), static_cast<int>(value.size())); |
| 305 | } |
| 306 | |
| 307 | bool Pickle::WriteWString(const std::wstring& value) { |
| 308 | if (!WriteInt(static_cast<int>(value.size()))) |
| 309 | return false; |
| 310 | |
| 311 | return WriteBytes(value.data(), |
estade@chromium.org | 38a18bf | 2009-03-04 12:36:36 +0900 | [diff] [blame] | 312 | static_cast<int>(value.size() * sizeof(wchar_t))); |
| 313 | } |
| 314 | |
| 315 | bool Pickle::WriteString16(const string16& value) { |
| 316 | if (!WriteInt(static_cast<int>(value.size()))) |
| 317 | return false; |
| 318 | |
| 319 | return WriteBytes(value.data(), |
| 320 | static_cast<int>(value.size()) * sizeof(char16)); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | bool Pickle::WriteData(const char* data, int length) { |
wtc@chromium.org | c2f15c5 | 2009-07-29 06:00:03 +0900 | [diff] [blame] | 324 | return length >= 0 && WriteInt(length) && WriteBytes(data, length); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 325 | } |
| 326 | |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 327 | bool Pickle::WriteBytes(const void* data, int data_len) { |
kushi.p@gmail.com | 381e966 | 2011-05-04 10:29:38 +0900 | [diff] [blame] | 328 | DCHECK_NE(kCapacityReadOnly, capacity_) << "oops: pickle is readonly"; |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 329 | |
| 330 | char* dest = BeginWrite(data_len); |
| 331 | if (!dest) |
| 332 | return false; |
| 333 | |
| 334 | memcpy(dest, data, data_len); |
| 335 | |
| 336 | EndWrite(dest, data_len); |
| 337 | return true; |
| 338 | } |
| 339 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 340 | char* Pickle::BeginWriteData(int length) { |
darin@google.com | cf7eff4 | 2008-08-15 10:05:11 +0900 | [diff] [blame] | 341 | DCHECK_EQ(variable_buffer_offset_, 0U) << |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 342 | "There can only be one variable buffer in a Pickle"; |
| 343 | |
wtc@chromium.org | c2f15c5 | 2009-07-29 06:00:03 +0900 | [diff] [blame] | 344 | if (length < 0 || !WriteInt(length)) |
| 345 | return NULL; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 346 | |
| 347 | char *data_ptr = BeginWrite(length); |
| 348 | if (!data_ptr) |
| 349 | return NULL; |
| 350 | |
| 351 | variable_buffer_offset_ = |
| 352 | data_ptr - reinterpret_cast<char*>(header_) - sizeof(int); |
| 353 | |
| 354 | // EndWrite doesn't necessarily have to be called after the write operation, |
| 355 | // so we call it here to pad out what the caller will eventually write. |
| 356 | EndWrite(data_ptr, length); |
| 357 | return data_ptr; |
| 358 | } |
| 359 | |
maruel@google.com | a01bb10 | 2008-08-08 02:04:23 +0900 | [diff] [blame] | 360 | void Pickle::TrimWriteData(int new_length) { |
ukai@chromium.org | d37bd34 | 2009-10-28 14:27:22 +0900 | [diff] [blame] | 361 | DCHECK_NE(variable_buffer_offset_, 0U); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 362 | |
maruel@google.com | a01bb10 | 2008-08-08 02:04:23 +0900 | [diff] [blame] | 363 | // Fetch the the variable buffer size |
| 364 | int* cur_length = reinterpret_cast<int*>( |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 365 | reinterpret_cast<char*>(header_) + variable_buffer_offset_); |
| 366 | |
maruel@google.com | a01bb10 | 2008-08-08 02:04:23 +0900 | [diff] [blame] | 367 | if (new_length < 0 || new_length > *cur_length) { |
| 368 | NOTREACHED() << "Invalid length in TrimWriteData."; |
| 369 | return; |
deanm@google.com | 8ba9dfb | 2008-08-08 00:18:20 +0900 | [diff] [blame] | 370 | } |
maruel@google.com | a01bb10 | 2008-08-08 02:04:23 +0900 | [diff] [blame] | 371 | |
| 372 | // Update the payload size and variable buffer size |
| 373 | header_->payload_size -= (*cur_length - new_length); |
| 374 | *cur_length = new_length; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 375 | } |
| 376 | |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 377 | char* Pickle::BeginWrite(size_t length) { |
| 378 | // write at a uint32-aligned offset from the beginning of the header |
| 379 | size_t offset = AlignInt(header_->payload_size, sizeof(uint32)); |
| 380 | |
| 381 | size_t new_size = offset + length; |
| 382 | size_t needed_size = header_size_ + new_size; |
| 383 | if (needed_size > capacity_ && !Resize(std::max(capacity_ * 2, needed_size))) |
| 384 | return NULL; |
| 385 | |
| 386 | #ifdef ARCH_CPU_64_BITS |
thestig@chromium.org | f0c8f44 | 2011-10-11 07:20:33 +0900 | [diff] [blame^] | 387 | DCHECK_LE(length, kuint32max); |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 388 | #endif |
| 389 | |
| 390 | header_->payload_size = static_cast<uint32>(new_size); |
| 391 | return payload() + offset; |
| 392 | } |
| 393 | |
| 394 | void Pickle::EndWrite(char* dest, int length) { |
jeanluc@chromium.org | 5fcf787 | 2011-08-18 02:41:02 +0900 | [diff] [blame] | 395 | // Zero-pad to keep tools like valgrind from complaining about uninitialized |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 396 | // memory. |
| 397 | if (length % sizeof(uint32)) |
| 398 | memset(dest + length, 0, sizeof(uint32) - (length % sizeof(uint32))); |
| 399 | } |
| 400 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 401 | bool Pickle::Resize(size_t new_capacity) { |
| 402 | new_capacity = AlignInt(new_capacity, kPayloadUnit); |
| 403 | |
willchan@chromium.org | 33e05ef | 2010-03-03 03:29:42 +0900 | [diff] [blame] | 404 | CHECK_NE(capacity_, kCapacityReadOnly); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 405 | void* p = realloc(header_, new_capacity); |
| 406 | if (!p) |
| 407 | return false; |
| 408 | |
| 409 | header_ = reinterpret_cast<Header*>(p); |
| 410 | capacity_ = new_capacity; |
| 411 | return true; |
| 412 | } |
| 413 | |
| 414 | // static |
| 415 | const char* Pickle::FindNext(size_t header_size, |
| 416 | const char* start, |
| 417 | const char* end) { |
kushi.p@gmail.com | e486977 | 2011-04-22 22:13:07 +0900 | [diff] [blame] | 418 | DCHECK_EQ(header_size, AlignInt(header_size, sizeof(uint32))); |
| 419 | DCHECK_LE(header_size, static_cast<size_t>(kPayloadUnit)); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 420 | |
glider@chromium.org | 8b725fa | 2011-01-26 22:02:27 +0900 | [diff] [blame] | 421 | if (static_cast<size_t>(end - start) < sizeof(Header)) |
| 422 | return NULL; |
| 423 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 424 | const Header* hdr = reinterpret_cast<const Header*>(start); |
| 425 | const char* payload_base = start + header_size; |
| 426 | const char* payload_end = payload_base + hdr->payload_size; |
| 427 | if (payload_end < payload_base) |
| 428 | return NULL; |
| 429 | |
| 430 | return (payload_end > end) ? NULL : payload_end; |
| 431 | } |