| // Copyright (C) 2009-2011, International Business Machines |
| // Corporation and others. All Rights Reserved. |
| // |
| // Copyright 2007 Google Inc. All Rights Reserved. |
| // Author: sanjay@google.com (Sanjay Ghemawat) |
| |
| #include "unicode/utypes.h" |
| #include "unicode/bytestream.h" |
| #include "cmemory.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| ByteSink::~ByteSink() {} |
| |
| char* ByteSink::GetAppendBuffer(int32_t min_capacity, |
| int32_t /*desired_capacity_hint*/, |
| char* scratch, int32_t scratch_capacity, |
| int32_t* result_capacity) { |
| if (min_capacity < 1 || scratch_capacity < min_capacity) { |
| *result_capacity = 0; |
| return NULL; |
| } |
| *result_capacity = scratch_capacity; |
| return scratch; |
| } |
| |
| void ByteSink::Flush() {} |
| |
| CheckedArrayByteSink::CheckedArrayByteSink(char* outbuf, int32_t capacity) |
| : outbuf_(outbuf), capacity_(capacity < 0 ? 0 : capacity), |
| size_(0), appended_(0), overflowed_(FALSE) { |
| } |
| |
| CheckedArrayByteSink::~CheckedArrayByteSink() {} |
| |
| CheckedArrayByteSink& CheckedArrayByteSink::Reset() { |
| size_ = appended_ = 0; |
| overflowed_ = FALSE; |
| return *this; |
| } |
| |
| void CheckedArrayByteSink::Append(const char* bytes, int32_t n) { |
| if (n <= 0) { |
| return; |
| } |
| appended_ += n; |
| int32_t available = capacity_ - size_; |
| if (n > available) { |
| n = available; |
| overflowed_ = TRUE; |
| } |
| if (n > 0 && bytes != (outbuf_ + size_)) { |
| uprv_memcpy(outbuf_ + size_, bytes, n); |
| } |
| size_ += n; |
| } |
| |
| char* CheckedArrayByteSink::GetAppendBuffer(int32_t min_capacity, |
| int32_t /*desired_capacity_hint*/, |
| char* scratch, |
| int32_t scratch_capacity, |
| int32_t* result_capacity) { |
| if (min_capacity < 1 || scratch_capacity < min_capacity) { |
| *result_capacity = 0; |
| return NULL; |
| } |
| int32_t available = capacity_ - size_; |
| if (available >= min_capacity) { |
| *result_capacity = available; |
| return outbuf_ + size_; |
| } else { |
| *result_capacity = scratch_capacity; |
| return scratch; |
| } |
| } |
| |
| U_NAMESPACE_END |
