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#ifndef QPID_FRAMING_ENDIAN_H
#define QPID_FRAMING_ENDIAN_H
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 "qpid/sys/IntegerTypes.h"
namespace qpid {
namespace framing {
namespace endian {
/** Decode integer from network byte order buffer to type T, buffer must be at least sizeof(T). */
template <class T> T decodeInt(const uint8_t* buffer) {
T v = buffer[0];
for (size_t i = 1; i < sizeof(T); ++i) {
v <<= 8;
v |= buffer[i];
}
return v;
}
/** Encode integer value to network byte order in buffer, buffer must be at least sizeof(T). */
template <class T> void encodeInt(uint8_t* buffer, T value) {
for (size_t i = sizeof(T); i > 0; --i) {
buffer[i-1] = value & 0XFF;
value >>= 8;
}
}
// Compute the int type that can hold a float type.
template <class T> struct IntBox { typedef T Type; };
template <> struct IntBox<float> { typedef uint32_t Type; };
template <> struct IntBox<double> { typedef uint64_t Type; };
/** Decode floating from network byte order buffer to type T, buffer must be at least sizeof(T). */
template <class T> T decodeFloat(const uint8_t* buffer) {
typedef typename IntBox<T>::Type Box;
union { T f; Box i; } u;
u.i = decodeInt<Box>(buffer);
return u.f;
}
/** Encode floating value to network byte order in buffer, buffer must be at least sizeof(T). */
template <class T> void encodeFloat(uint8_t* buffer, T value) {
typedef typename IntBox<T>::Type Box;
union { T f; Box i; } u;
u.f = value;
encodeInt(buffer, u.i);
}
}}} // namespace qpid::framing::endian
#endif /*!QPID_FRAMING_ENDIAN_H*/
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