mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
09ddcece30
Change-Id: I4d2759ffa80c0106838ad0ddbc6dd086fddda1dd Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/157742 Commit-Queue: Tess Strickland <sstrickl@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
#include "vm/zone_text_buffer.h"
|
|
|
|
#include "platform/assert.h"
|
|
#include "platform/globals.h"
|
|
#include "platform/utils.h"
|
|
#include "vm/object.h"
|
|
#include "vm/os.h"
|
|
#include "vm/zone.h"
|
|
|
|
namespace dart {
|
|
|
|
ZoneTextBuffer::ZoneTextBuffer(Zone* zone, intptr_t initial_capacity)
|
|
: zone_(zone) {
|
|
ASSERT(initial_capacity > 0);
|
|
buffer_ = reinterpret_cast<char*>(zone->Alloc<char>(initial_capacity));
|
|
capacity_ = initial_capacity;
|
|
buffer_[length_] = '\0';
|
|
}
|
|
|
|
void ZoneTextBuffer::Clear() {
|
|
const intptr_t initial_capacity = 64;
|
|
buffer_ = reinterpret_cast<char*>(zone_->Alloc<char>(initial_capacity));
|
|
capacity_ = initial_capacity;
|
|
length_ = 0;
|
|
buffer_[length_] = '\0';
|
|
}
|
|
|
|
bool ZoneTextBuffer::EnsureCapacity(intptr_t len) {
|
|
intptr_t remaining = capacity_ - length_;
|
|
if (remaining <= len) {
|
|
intptr_t new_capacity = capacity_ + Utils::Maximum(capacity_, len);
|
|
buffer_ = zone_->Realloc<char>(buffer_, capacity_, new_capacity);
|
|
capacity_ = new_capacity;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
} // namespace dart
|