66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
// Copyright (C) 2009, 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
|
|
|
|
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), overflowed_(false) {
|
|
}
|
|
|
|
void CheckedArrayByteSink::Append(const char* bytes, int32_t n) {
|
|
if (n <= 0) {
|
|
return;
|
|
}
|
|
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
|