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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "chromeos/process_proxy/process_output_watcher.h" | 5 #include "chromeos/process_proxy/process_output_watcher.h" |
| 6 | 6 |
| 7 #include <stddef.h> |
| 8 #include <stdint.h> |
| 9 |
| 7 #include <algorithm> | 10 #include <algorithm> |
| 8 #include <cstdio> | 11 #include <cstdio> |
| 9 #include <cstring> | 12 #include <cstring> |
| 10 #include "base/bind.h" | 13 #include "base/bind.h" |
| 11 #include "base/location.h" | 14 #include "base/location.h" |
| 12 #include "base/logging.h" | 15 #include "base/logging.h" |
| 13 #include "base/posix/eintr_wrapper.h" | 16 #include "base/posix/eintr_wrapper.h" |
| 14 #include "base/single_thread_task_runner.h" | 17 #include "base/single_thread_task_runner.h" |
| 15 #include "base/third_party/icu/icu_utf.h" | 18 #include "base/third_party/icu/icu_utf.h" |
| 16 #include "base/thread_task_runner_handle.h" | 19 #include "base/thread_task_runner_handle.h" |
| 17 #include "base/time/time.h" | 20 #include "base/time/time.h" |
| 18 | 21 |
| 19 namespace { | 22 namespace { |
| 20 | 23 |
| 21 // Gets byte size for a UTF8 character given it's leading byte. The character | 24 // Gets byte size for a UTF8 character given it's leading byte. The character |
| 22 // size is encoded as number of leading '1' bits in the character's leading | 25 // size is encoded as number of leading '1' bits in the character's leading |
| 23 // byte. If the most significant bit is '0', the character is a valid ASCII | 26 // byte. If the most significant bit is '0', the character is a valid ASCII |
| 24 // and it's byte size is 1. | 27 // and it's byte size is 1. |
| 25 // The method returns 1 if the provided byte is invalid leading byte. | 28 // The method returns 1 if the provided byte is invalid leading byte. |
| 26 size_t UTF8SizeFromLeadingByte(uint8 leading_byte) { | 29 size_t UTF8SizeFromLeadingByte(uint8_t leading_byte) { |
| 27 size_t byte_count = 0; | 30 size_t byte_count = 0; |
| 28 uint8 mask = 1 << 7; | 31 uint8_t mask = 1 << 7; |
| 29 uint8 error_mask = 1 << (7 - CBU8_MAX_LENGTH); | 32 uint8_t error_mask = 1 << (7 - CBU8_MAX_LENGTH); |
| 30 while (leading_byte & mask) { | 33 while (leading_byte & mask) { |
| 31 if (mask & error_mask) | 34 if (mask & error_mask) |
| 32 return 1; | 35 return 1; |
| 33 mask >>= 1; | 36 mask >>= 1; |
| 34 ++byte_count; | 37 ++byte_count; |
| 35 } | 38 } |
| 36 return byte_count ? byte_count : 1; | 39 return byte_count ? byte_count : 1; |
| 37 } | 40 } |
| 38 | 41 |
| 39 } // namespace | 42 } // namespace |
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| 160 // update the buffer size accordingly. | 163 // update the buffer size accordingly. |
| 161 if (output_to_report < read_buffer_size_) { | 164 if (output_to_report < read_buffer_size_) { |
| 162 for (size_t i = output_to_report; i < read_buffer_size_; ++i) { | 165 for (size_t i = output_to_report; i < read_buffer_size_; ++i) { |
| 163 read_buffer_[i - output_to_report] = read_buffer_[i]; | 166 read_buffer_[i - output_to_report] = read_buffer_[i]; |
| 164 } | 167 } |
| 165 } | 168 } |
| 166 read_buffer_size_ -= output_to_report; | 169 read_buffer_size_ -= output_to_report; |
| 167 } | 170 } |
| 168 | 171 |
| 169 } // namespace chromeos | 172 } // namespace chromeos |
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