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streamReader.I
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327 lines (298 loc) · 7.22 KB
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/**
* PANDA 3D SOFTWARE
* Copyright (c) Carnegie Mellon University. All rights reserved.
*
* All use of this software is subject to the terms of the revised BSD
* license. You should have received a copy of this license along
* with this source code in a file named "LICENSE."
*
* @file streamReader.I
* @author drose
* @date 2002-08-04
*/
/**
*
*/
INLINE StreamReader::
StreamReader(std::istream &in) :
_in(&in),
_owns_stream(false)
{
}
/**
* If owns_stream is true, the stream pointer will be deleted when the
* StreamReader destructs.
*/
INLINE StreamReader::
StreamReader(std::istream *in, bool owns_stream) :
_in(in),
_owns_stream(owns_stream)
{
}
/**
* The copy constructor does not copy ownership of the stream.
*/
INLINE StreamReader::
StreamReader(const StreamReader ©) :
_in(copy._in),
_owns_stream(false)
{
}
/**
* The move constructor steals ownership of the stream.
*/
INLINE StreamReader::
StreamReader(StreamReader &&from) noexcept :
_in(from._in),
_owns_stream(from._owns_stream)
{
from._owns_stream = false;
}
/**
* The copy assignment operator does not copy ownership of the stream.
*/
INLINE void StreamReader::
operator = (const StreamReader ©) {
if (_owns_stream) {
delete _in;
}
_in = copy._in;
_owns_stream = false;
}
/**
* The move assignment operator steals ownership of the stream.
*/
INLINE void StreamReader::
operator = (StreamReader &&from) noexcept {
if (_owns_stream) {
delete _in;
}
_in = from._in;
_owns_stream = from._owns_stream;
from._owns_stream = false;
}
/**
*
*/
INLINE StreamReader::
~StreamReader() {
if (_owns_stream) {
delete _in;
}
}
/**
* Returns the stream in use.
*/
INLINE std::istream *StreamReader::
get_istream() const {
return _in;
}
/**
* Extracts a boolean value.
*/
INLINE bool StreamReader::
get_bool() {
return (get_uint8() != 0);
}
/**
* Extracts a signed 8-bit integer.
*/
INLINE int8_t StreamReader::
get_int8() {
return (int8_t)_in->get();
}
/**
* Extracts an unsigned 8-bit integer.
*/
INLINE uint8_t StreamReader::
get_uint8() {
return (uint8_t)_in->get();
}
/**
* Extracts a signed 16-bit integer.
*/
INLINE int16_t StreamReader::
get_int16() {
int16_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a signed 32-bit integer.
*/
INLINE int32_t StreamReader::
get_int32() {
int32_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a signed 64-bit integer.
*/
INLINE int64_t StreamReader::
get_int64() {
int64_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts an unsigned 16-bit integer.
*/
INLINE uint16_t StreamReader::
get_uint16() {
uint16_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts an unsigned 32-bit integer.
*/
INLINE uint32_t StreamReader::
get_uint32() {
uint32_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts an unsigned 64-bit integer.
*/
INLINE uint64_t StreamReader::
get_uint64() {
uint64_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a 32-bit single-precision floating-point number. Since this kind
* of float is not necessarily portable across different architectures,
* special care is required.
*/
INLINE float StreamReader::
get_float32() {
// For now, we assume the float format is portable across all architectures
// we are concerned with. If we come across one that is different, we will
// have to convert.
nassertr(sizeof(float) == 4, 0.0f);
float readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a 64-bit floating-point number.
*/
INLINE PN_float64 StreamReader::
get_float64() {
PN_float64 readval, retval;
_in->read((char *)&readval, sizeof(readval));
LittleEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a signed big-endian 16-bit integer.
*/
INLINE int16_t StreamReader::
get_be_int16() {
int16_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a signed big-endian 32-bit integer.
*/
INLINE int32_t StreamReader::
get_be_int32() {
int32_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a signed big-endian 64-bit integer.
*/
INLINE int64_t StreamReader::
get_be_int64() {
int64_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts an unsigned big-endian 16-bit integer.
*/
INLINE uint16_t StreamReader::
get_be_uint16() {
uint16_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts an unsigned big-endian 32-bit integer.
*/
INLINE uint32_t StreamReader::
get_be_uint32() {
uint32_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts an unsigned big-endian 64-bit integer.
*/
INLINE uint64_t StreamReader::
get_be_uint64() {
uint64_t readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a 32-bit single-precision big-endian floating-point number. Since
* this kind of float is not necessarily portable across different
* architectures, special care is required.
*/
INLINE float StreamReader::
get_be_float32() {
// For now, we assume the float format is portable across all architectures
// we are concerned with. If we come across one that is different, we will
// have to convert.
nassertr(sizeof(float) == 4, 0.0f);
float readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}
/**
* Extracts a 64-bit big-endian floating-point number.
*/
INLINE PN_float64 StreamReader::
get_be_float64() {
PN_float64 readval, retval;
_in->read((char *)&readval, sizeof(readval));
BigEndian s(&readval, 0, sizeof(readval));
s.store_value(&retval, sizeof(retval));
return retval;
}