projects / apple / icu.git / blame
| Commit | Line | Data |
|---|---|---|
| 4388f060 | 1 | // Copyright (C) 2009-2011, International Business Machines |
| 729e4ab9 A |
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 | ||
| 4388f060 A |
13 | ByteSink::~ByteSink() {} |
| 14 | ||
| 729e4ab9 A |
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 | ||
| 4388f060 A |
34 | CheckedArrayByteSink::~CheckedArrayByteSink() {} |
| 35 | ||
| 729e4ab9 A |
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 |