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/*
* Copyright 2011 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "sfntly/data/byte_array.h"
#include <algorithm>
#include "sfntly/port/exception_type.h"
namespace sfntly {
const int32_t ByteArray::COPY_BUFFER_SIZE = 8192;
ByteArray::~ByteArray() {}
int32_t ByteArray::Length() { return filled_length_; }
int32_t ByteArray::Size() { return storage_length_; }
int32_t ByteArray::SetFilledLength(int32_t filled_length) {
filled_length_ = std::min<int32_t>(filled_length, storage_length_);
return filled_length_;
}
int32_t ByteArray::Get(int32_t index) {
if (index < 0 || index >= Length())
return -1;
return InternalGet(index) & 0xff;
}
int32_t ByteArray::Get(int32_t index, ByteVector* b) {
assert(b);
return Get(index, &((*b)[0]), 0, b->size());
}
int32_t ByteArray::Get(int32_t index,
byte_t* b,
int32_t offset,
int32_t length) {
assert(b);
if (index < 0 || index >= filled_length_) {
return 0;
}
int32_t actual_length = std::min<int32_t>(length, filled_length_ - index);
return InternalGet(index, b, offset, actual_length);
}
void ByteArray::Put(int32_t index, byte_t b) {
if (index < 0 || index >= Size()) {
#if defined (SFNTLY_NO_EXCEPTION)
return;
#else
throw IndexOutOfBoundException(
"Attempt to write outside the bounds of the data");
#endif
}
InternalPut(index, b);
filled_length_ = std::max<int32_t>(filled_length_, index + 1);
}
int32_t ByteArray::Put(int index, ByteVector* b) {
assert(b);
return Put(index, &((*b)[0]), 0, b->size());
}
int32_t ByteArray::Put(int32_t index,
byte_t* b,
int32_t offset,
int32_t length) {
assert(b);
if (index < 0 || index >= Size()) {
#if defined (SFNTLY_NO_EXCEPTION)
return 0;
#else
throw IndexOutOfBoundException(
"Attempt to write outside the bounds of the data");
#endif
}
int32_t actual_length = std::min<int32_t>(length, Size() - index);
int32_t bytes_written = InternalPut(index, b, offset, actual_length);
filled_length_ = std::max<int32_t>(filled_length_, index + bytes_written);
return bytes_written;
}
int32_t ByteArray::CopyTo(ByteArray* array) {
return CopyTo(array, 0, Length());
}
int32_t ByteArray::CopyTo(ByteArray* array, int32_t offset, int32_t length) {
return CopyTo(0, array, offset, length);
}
int32_t ByteArray::CopyTo(int32_t dst_offset, ByteArray* array,
int32_t src_offset, int32_t length) {
assert(array);
if (array->Size() < dst_offset + length) { // insufficient space
return -1;
}
ByteVector b(COPY_BUFFER_SIZE);
int32_t bytes_read = 0;
int32_t index = 0;
int32_t remaining_length = length;
int32_t buffer_length = std::min<int32_t>(COPY_BUFFER_SIZE, length);
while ((bytes_read =
Get(index + src_offset, &(b[0]), 0, buffer_length)) > 0) {
int bytes_written = array->Put(index + dst_offset, &(b[0]), 0, bytes_read);
UNREFERENCED_PARAMETER(bytes_written);
index += bytes_read;
remaining_length -= bytes_read;
buffer_length = std::min<int32_t>(b.size(), remaining_length);
}
return index;
}
int32_t ByteArray::CopyTo(OutputStream* os) {
return CopyTo(os, 0, Length());
}
int32_t ByteArray::CopyTo(OutputStream* os, int32_t offset, int32_t length) {
ByteVector b(COPY_BUFFER_SIZE);
int32_t bytes_read = 0;
int32_t index = 0;
int32_t buffer_length = std::min<int32_t>(COPY_BUFFER_SIZE, length);
while ((bytes_read = Get(index + offset, &(b[0]), 0, buffer_length)) > 0) {
os->Write(&b, 0, bytes_read);
index += bytes_read;
buffer_length = std::min<int32_t>(b.size(), length - index);
}
return index;
}
bool ByteArray::CopyFrom(InputStream* is, int32_t length) {
ByteVector b(COPY_BUFFER_SIZE);
int32_t bytes_read = 0;
int32_t index = 0;
int32_t buffer_length = std::min<int32_t>(COPY_BUFFER_SIZE, length);
while ((bytes_read = is->Read(&b, 0, buffer_length)) > 0) {
if (Put(index, &(b[0]), 0, bytes_read) != bytes_read) {
#if defined (SFNTLY_NO_EXCEPTION)
return 0;
#else
throw IOException("Error writing bytes.");
#endif
}
index += bytes_read;
length -= bytes_read;
buffer_length = std::min<int32_t>(b.size(), length);
}
return true;
}
bool ByteArray::CopyFrom(InputStream* is) {
ByteVector b(COPY_BUFFER_SIZE);
int32_t bytes_read = 0;
int32_t index = 0;
int32_t buffer_length = COPY_BUFFER_SIZE;
while ((bytes_read = is->Read(&b, 0, buffer_length)) > 0) {
if (Put(index, &b[0], 0, bytes_read) != bytes_read) {
#if defined (SFNTLY_NO_EXCEPTION)
return 0;
#else
throw IOException("Error writing bytes.");
#endif
}
index += bytes_read;
}
return true;
}
ByteArray::ByteArray(int32_t filled_length,
int32_t storage_length,
bool growable) {
Init(filled_length, storage_length, growable);
}
ByteArray::ByteArray(int32_t filled_length, int32_t storage_length) {
Init(filled_length, storage_length, false);
}
void ByteArray::Init(int32_t filled_length,
int32_t storage_length,
bool growable) {
storage_length_ = storage_length;
growable_ = growable;
SetFilledLength(filled_length);
}
} // namespace sfntly
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