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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
@author Thomas F. Gundersen, �ystein Fledsberg
@version $Id$
@date 2004-03-15
*/
#include "bytebuffer.h"
#include "bufferexceptions.h"
#include "stringutil.h"
#include <vespa/vespalib/stllike/asciistream.h>
#include <sstream>
#include <arpa/inet.h>
using vespalib::alloc::Alloc;
using vespalib::make_string;
namespace document {
namespace {
[[noreturn]] static void throwOutOfBounds(size_t want, size_t has) __attribute__((noinline));
void throwOutOfBounds(size_t want, size_t has)
{
throw BufferOutOfBoundsException(want, has, VESPA_STRLOC);
}
}
#if defined(__i386__) || defined(__x86_64__) || defined(__AARCH64EL__)
template<typename T>
void
ByteBuffer::getDoubleLongNetwork(T &val) {
//TODO: Change this if we move to big-endian hardware
if (__builtin_expect(getRemaining() < (int)sizeof(T), 0)) {
throwOutOfBounds(sizeof(T), getRemaining());
}
auto * data = reinterpret_cast<unsigned char*>(&val);
for (int i=sizeof(T)-1; i>=0; --i) {
getByte(data[i]);
}
}
#else
#error "getDoubleLongNetwork is undefined for this arcitecture"
#endif
VESPA_IMPLEMENT_EXCEPTION_SPINE(BufferOutOfBoundsException);
vespalib::string BufferOutOfBoundsException::createMessage(size_t pos, size_t len) {
vespalib::asciistream ost;
ost << pos << " > " << len;
return ost.str();
}
BufferOutOfBoundsException::BufferOutOfBoundsException(size_t pos, size_t len, const vespalib::string& location)
: IoException(createMessage(pos, len), IoException::NO_SPACE, location, 1)
{
}
ByteBuffer::ByteBuffer(Alloc buffer, uint32_t len)
: _buffer(static_cast<const char *>(buffer.get())),
_len(len),
_pos(0),
_ownedBuffer(std::make_unique<Alloc>(std::move(buffer)))
{
}
ByteBuffer::ByteBuffer(std::unique_ptr<Alloc> buffer, uint32_t len)
: _buffer(static_cast<const char *>(buffer->get())),
_len(len),
_pos(0),
_ownedBuffer(std::move(buffer))
{
}
ByteBuffer::ByteBuffer(const ByteBuffer& rhs)
: _buffer(nullptr),
_len(rhs._len),
_pos(rhs._pos),
_ownedBuffer()
{
if (rhs._len > 0 && rhs._buffer) {
auto buf = Alloc::alloc(rhs._len);
memcpy(buf.get(), rhs._buffer, rhs._len);
_buffer = static_cast<const char *>(buf.get());
_ownedBuffer = std::make_unique<Alloc>(std::move(buf));
}
}
ByteBuffer
ByteBuffer::copyBuffer(const char* buffer, uint32_t len)
{
if (buffer && len) {
Alloc newBuf = Alloc::alloc(len);
memcpy(newBuf.get(), buffer, len);
return ByteBuffer(std::make_unique<Alloc>(std::move(newBuf)), len);
} else {
return ByteBuffer();
}
}
void ByteBuffer::incPos(uint32_t pos)
{
if (_pos + pos > _len) {
throwOutOfBounds(_pos + pos, _len);
} else {
_pos+=pos;
}
}
void ByteBuffer::getNumeric(uint8_t & v) {
if (__builtin_expect(getRemaining() < sizeof(v), 0)) {
throwOutOfBounds(getRemaining(), sizeof(v));
} else {
v = *reinterpret_cast<const uint8_t *>(getBufferAtPos());
incPosNoCheck(sizeof(v));
}
}
void ByteBuffer::getNumericNetwork(int16_t & v) {
if (__builtin_expect(getRemaining() < sizeof(v), 0)) {
throwOutOfBounds(getRemaining(), sizeof(v));
} else {
uint16_t val;
memcpy(&val, getBufferAtPos(), sizeof(val));
v = ntohs(val);
incPosNoCheck(sizeof(v));
}
}
void ByteBuffer::getNumericNetwork(int32_t & v) {
if (__builtin_expect(getRemaining() < sizeof(v), 0)) {
throwOutOfBounds(getRemaining(), sizeof(v));
} else {
uint32_t val;
memcpy(&val, getBufferAtPos(), sizeof(val));
v = ntohl(val);
incPosNoCheck(sizeof(v));
}
}
void ByteBuffer::getNumeric(int64_t& v) {
if (__builtin_expect(getRemaining() < sizeof(v), 0)) {
throwOutOfBounds(getRemaining(), sizeof(v));
} else {
memcpy(&v, getBufferAtPos(), sizeof(v));
incPosNoCheck(sizeof(v));
}
}
void ByteBuffer::getNumericNetwork(double & v) {
getDoubleLongNetwork(v);
}
void ByteBuffer::getNumericNetwork(int64_t & v) {
getDoubleLongNetwork(v);
}
void ByteBuffer::getBytes(void *buffer, uint32_t count)
{
const char *v = getBufferAtPos();
incPos(count);
if (count > 0) {
memcpy(buffer, v, count);
}
}
} // document
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