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