The Tor Browser / file comparison
comparison: intl/icu/source/common/bytestream.cpp
intl/icu/source/common/bytestream.cpp
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:4c974143fe10 |
|---|---|
| 1 // Copyright (C) 2009-2011, International Business Machines | |
| 2 // Corporation and others. All Rights Reserved. | |
| 3 // | |
| 4 // Copyright 2007 Google Inc. All Rights Reserved. | |
| 5 // Author: sanjay@google.com (Sanjay Ghemawat) | |
| 6 | |
| 7 #include "unicode/utypes.h" | |
| 8 #include "unicode/bytestream.h" | |
| 9 #include "cmemory.h" | |
| 10 | |
| 11 U_NAMESPACE_BEGIN | |
| 12 | |
| 13 ByteSink::~ByteSink() {} | |
| 14 | |
| 15 char* ByteSink::GetAppendBuffer(int32_t min_capacity, | |
| 16 int32_t /*desired_capacity_hint*/, | |
| 17 char* scratch, int32_t scratch_capacity, | |
| 18 int32_t* result_capacity) { | |
| 19 if (min_capacity < 1 || scratch_capacity < min_capacity) { | |
| 20 *result_capacity = 0; | |
| 21 return NULL; | |
| 22 } | |
| 23 *result_capacity = scratch_capacity; | |
| 24 return scratch; | |
| 25 } | |
| 26 | |
| 27 void ByteSink::Flush() {} | |
| 28 | |
| 29 CheckedArrayByteSink::CheckedArrayByteSink(char* outbuf, int32_t capacity) | |
| 30 : outbuf_(outbuf), capacity_(capacity < 0 ? 0 : capacity), | |
| 31 size_(0), appended_(0), overflowed_(FALSE) { | |
| 32 } | |
| 33 | |
| 34 CheckedArrayByteSink::~CheckedArrayByteSink() {} | |
| 35 | |
| 36 CheckedArrayByteSink& CheckedArrayByteSink::Reset() { | |
| 37 size_ = appended_ = 0; | |
| 38 overflowed_ = FALSE; | |
| 39 return *this; | |
| 40 } | |
| 41 | |
| 42 void CheckedArrayByteSink::Append(const char* bytes, int32_t n) { | |
| 43 if (n <= 0) { | |
| 44 return; | |
| 45 } | |
| 46 appended_ += n; | |
| 47 int32_t available = capacity_ - size_; | |
| 48 if (n > available) { | |
| 49 n = available; | |
| 50 overflowed_ = TRUE; | |
| 51 } | |
| 52 if (n > 0 && bytes != (outbuf_ + size_)) { | |
| 53 uprv_memcpy(outbuf_ + size_, bytes, n); | |
| 54 } | |
| 55 size_ += n; | |
| 56 } | |
| 57 | |
| 58 char* CheckedArrayByteSink::GetAppendBuffer(int32_t min_capacity, | |
| 59 int32_t /*desired_capacity_hint*/, | |
| 60 char* scratch, | |
| 61 int32_t scratch_capacity, | |
| 62 int32_t* result_capacity) { | |
| 63 if (min_capacity < 1 || scratch_capacity < min_capacity) { | |
| 64 *result_capacity = 0; | |
| 65 return NULL; | |
| 66 } | |
| 67 int32_t available = capacity_ - size_; | |
| 68 if (available >= min_capacity) { | |
| 69 *result_capacity = available; | |
| 70 return outbuf_ + size_; | |
| 71 } else { | |
| 72 *result_capacity = scratch_capacity; | |
| 73 return scratch; | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 U_NAMESPACE_END |
